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Zhou B, Wong D, Fu Z, Guo H, Schulz C, Karkera G, Hahn H, Bianchini M, Wang Q. K-Doping Suppresses Oxygen Redox in P2-Na 0.67Ni 0.11Cu 0.22Mn 0.67O 2 Cathode Materials for Sodium-Ion Batteries. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2402991. [PMID: 38958092 DOI: 10.1002/smll.202402991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 06/13/2024] [Indexed: 07/04/2024]
Abstract
In P2-type layered oxide cathodes, Na site-regulation strategies are proposed to modulate the Na+ distribution and structural stability. However, their impact on the oxygen redox reactions remains poorly understood. Herein, the incorporation of K+ in the Na layer of Na0.67Ni0.11Cu0.22Mn0.67O2 is successfully applied. The effects of partial substitution of Na+ with K+ on electrochemical properties, structural stability, and oxygen redox reactions have been extensively studied. Improved Na+ diffusion kinetics of the cathode is observed from galvanostatic intermittent titration technique (GITT) and rate performance. The valence states and local structural environment of the transition metals (TMs) are elucidated via operando synchrotron X-ray absorption spectroscopy (XAS). It is revealed that the TMO2 slabs tend to be strengthened by K-doping, which efficiently facilitates reversible local structural change. Operando X-ray diffraction (XRD) further confirms more reversible phase changes during the charge/discharge for the cathode after K-doping. Density functional theory (DFT) calculations suggest that oxygen redox reaction in Na0.62K0.03Ni0.11Cu0.22Mn0.67O2 cathode has been remarkably suppressed as the nonbonding O 2p states shift down in the energy. This is further corroborated experimentally by resonant inelastic X-ray scattering (RIXS) spectroscopy, ultimately proving the role of K+ incorporated in the Na layer.
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Affiliation(s)
- Bei Zhou
- Bavarian Center for Battery Technology (BayBatt), Universität Bayreuth, Weiherstr. 26, 95448, Bayreuth, Germany
- KIT-TUD Joint Laboratory Nanomaterials-Technische Universität Darmstadt, Otto-Berndt-Str. 3, 64206, Darmstadt, Germany
| | - Deniz Wong
- Dynamics and Transport in Quantum Materials, Helmholtz-Zentrum Berlin für Materialen und Energie, GmbH, Albert-Einstein-Strasse 15, 12489, Berlin, Germany
| | - Zhongheng Fu
- Beijing Advanced Innovation Center for Materials Genome Engineering, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
| | - Hao Guo
- Bavarian Center for Battery Technology (BayBatt), Universität Bayreuth, Weiherstr. 26, 95448, Bayreuth, Germany
- Department of Chemistry, Universität Bayreuth, Universitätsstr. 30, 95447, Bayreuth, Germany
| | - Christian Schulz
- Dynamics and Transport in Quantum Materials, Helmholtz-Zentrum Berlin für Materialen und Energie, GmbH, Albert-Einstein-Strasse 15, 12489, Berlin, Germany
| | - Guruprakash Karkera
- Helmholtz Institute Ulm (HIU) Electrochemical Energy Storage, Helmholtzstr. 11, 89081, Ulm, Germany
| | - Horst Hahn
- KIT-TUD Joint Laboratory Nanomaterials-Technische Universität Darmstadt, Otto-Berndt-Str. 3, 64206, Darmstadt, Germany
- School of Sustainable Chemical, Biological and Materials Engineering, University of Oklahoma, 201 Stephenson Pkwy., Norman, OK, 73019, USA
| | - Matteo Bianchini
- Bavarian Center for Battery Technology (BayBatt), Universität Bayreuth, Weiherstr. 26, 95448, Bayreuth, Germany
- Department of Chemistry, Universität Bayreuth, Universitätsstr. 30, 95447, Bayreuth, Germany
| | - Qingsong Wang
- Bavarian Center for Battery Technology (BayBatt), Universität Bayreuth, Weiherstr. 26, 95448, Bayreuth, Germany
- Department of Chemistry, Universität Bayreuth, Universitätsstr. 30, 95447, Bayreuth, Germany
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2
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Rice DB, Wong D, Weyhermüller T, Neese F, DeBeer S. The spin-forbidden transition in iron(IV)-oxo catalysts relevant to two-state reactivity. SCIENCE ADVANCES 2024; 10:eado1603. [PMID: 38941457 PMCID: PMC11212722 DOI: 10.1126/sciadv.ado1603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 05/23/2024] [Indexed: 06/30/2024]
Abstract
Quintet oxoiron(IV) intermediates are often invoked in nonheme iron enzymes capable of performing selective oxidation, while most well-characterized synthetic model oxoiron(IV) complexes have a triplet ground state. These differing spin states lead to the proposal of a two-state reactivity model, where the complexes cross from the triplet to an excited quintet state. However, the energy of this quintet state has never been measured experimentally. Here, magnetic circular dichroism is used to assign the singlet and triplet excited states in a series of triplet oxoiron(IV) complexes. These transition energies are used to determine the energies of the quintet state via constrained fitting of 2p3d resonant inelastic x-ray scattering. This allowed for a direct correlation between the quintet energies and substrate C─H oxidation rates.
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Affiliation(s)
- Derek B. Rice
- Max Planck Institute for Chemical Energy Conversion, D-45470 Mülheim an der Ruhr, Germany
| | - Deniz Wong
- Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, D-14109 Berlin, Germany
| | - Thomas Weyhermüller
- Max Planck Institute for Chemical Energy Conversion, D-45470 Mülheim an der Ruhr, Germany
| | - Frank Neese
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim an der Ruhr, Germany
| | - Serena DeBeer
- Max Planck Institute for Chemical Energy Conversion, D-45470 Mülheim an der Ruhr, Germany
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3
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Li Y, Mazzio KA, Yaqoob N, Sun Y, Freytag AI, Wong D, Schulz C, Baran V, Mendez ASJ, Schuck G, Zając M, Kaghazchi P, Adelhelm P. Competing Mechanisms Determine Oxygen Redox in Doped Ni-Mn Based Layered Oxides for Na-Ion Batteries. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2309842. [PMID: 38269958 DOI: 10.1002/adma.202309842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 12/11/2023] [Indexed: 01/26/2024]
Abstract
Cation doping is an effective strategy for improving the cyclability of layered oxide cathode materials through suppression of phase transitions in the high voltage region. In this study, Mg and Sc are chosen as dopants in P2-Na0.67Ni0.33Mn0.67O2, and both have found to positively impact the cycling stability, but influence the high voltage regime in different ways. Through a combination of synchrotron-based methods and theoretical calculations it is shown that it is more than just suppression of the P2 to O2 phase transition that is critical for promoting the favorable properties, and that the interplay between Ni and O activity is also a critical aspect that dictates the performance. With Mg doping, the Ni activity can be enhanced while simultaneously suppressing the O activity. This is surprising because it is in contrast to what has been reported in other Mn-based layered oxides where Mg is known to trigger oxygen redox. This contradiction is addressed by proposing a competing mechanism between Ni and Mg that impacts differences in O activity in Na0.67MgxNi0.33- xMn0.67O2 (x < 0 < 0.33). These findings provide a new direction in understanding the effects of cation doping on the electrochemical behavior of layered oxides.
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Affiliation(s)
- Yongchun Li
- Institut für Chemie, Humboldt-University Berlin, Brook-Taylor-Str. 2, 12489, Berlin, Germany
| | - Katherine A Mazzio
- Institut für Chemie, Humboldt-University Berlin, Brook-Taylor-Str. 2, 12489, Berlin, Germany
- Joint Research Group "Operando Battery Analysis" (CE-GOBA), Helmholtz-Zentrum Berlin für Materialien und Energie, GmbH, Hahn-Meitner-Platz 1, 14109, Berlin, Germany
| | - Najma Yaqoob
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research Materials Synthesis and Processing (IEK-1), 52425, Jülich, Germany
- MESA+ Institute for Nanotechnology, University of Twente, Enschede, 7500 AE, The Netherlands
| | - Yanan Sun
- Institut für Chemie, Humboldt-University Berlin, Brook-Taylor-Str. 2, 12489, Berlin, Germany
- Joint Research Group "Operando Battery Analysis" (CE-GOBA), Helmholtz-Zentrum Berlin für Materialien und Energie, GmbH, Hahn-Meitner-Platz 1, 14109, Berlin, Germany
| | - Annica I Freytag
- Institut für Chemie, Humboldt-University Berlin, Brook-Taylor-Str. 2, 12489, Berlin, Germany
- Joint Research Group "Operando Battery Analysis" (CE-GOBA), Helmholtz-Zentrum Berlin für Materialien und Energie, GmbH, Hahn-Meitner-Platz 1, 14109, Berlin, Germany
| | - Deniz Wong
- Dynamics and Transport in Quantum Materials, Helmholtz-Zentrum Berlin für Materialen und Energie, GmbH, Albert-Einstein-Strasse 15, 12489, Berlin, Germany
| | - Christian Schulz
- Dynamics and Transport in Quantum Materials, Helmholtz-Zentrum Berlin für Materialen und Energie, GmbH, Albert-Einstein-Strasse 15, 12489, Berlin, Germany
| | - Volodymyr Baran
- Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607, Hamburg, Germany
| | - Alba San Jose Mendez
- Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607, Hamburg, Germany
| | - Götz Schuck
- Department Structure and Dynamics of Energy Materials, Helmholtz-Zentrum Berlin für Materialien und Energie, GmbH, Hahn-Meitner-Platz 1, 14109, Berlin, Germany
| | - Marcin Zając
- National Synchrotron Radiation Centre SOLARIS, Jagiellonian University, ul, Czerwone Maki 98, Kraków, 30-392, Poland
| | - Payam Kaghazchi
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research Materials Synthesis and Processing (IEK-1), 52425, Jülich, Germany
- MESA+ Institute for Nanotechnology, University of Twente, Enschede, 7500 AE, The Netherlands
| | - Philipp Adelhelm
- Institut für Chemie, Humboldt-University Berlin, Brook-Taylor-Str. 2, 12489, Berlin, Germany
- Joint Research Group "Operando Battery Analysis" (CE-GOBA), Helmholtz-Zentrum Berlin für Materialien und Energie, GmbH, Hahn-Meitner-Platz 1, 14109, Berlin, Germany
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Miyawaki J, Kosegawa Y, Harada Y. Angle-resolved X-ray emission spectroscopy facility realized by an innovative spectrometer rotation mechanism at SPring-8 BL07LSU. JOURNAL OF SYNCHROTRON RADIATION 2024; 31:208-216. [PMID: 38300129 PMCID: PMC10914175 DOI: 10.1107/s1600577523010391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 12/02/2023] [Indexed: 02/02/2024]
Abstract
The X-ray emission spectrometer at SPring-8 BL07LSU has recently been upgraded with advanced modifications that enable the rotation of the spectrometer with respect to the scattering angle. This major upgrade allows the scattering angle to be flexibly changed within the range of 45-135°, which considerably simplifies the measurement of angle-resolved X-ray emission spectroscopy. To accomplish the rotation system, a sophisticated sample chamber and a highly precise spectrometer rotation mechanism have been developed. The sample chamber has a specially designed combination of three rotary stages that can smoothly move the connection flange along the wide scattering angle without breaking the vacuum. In addition, the spectrometer is rotated by sliding on a flat metal surface, ensuring exceptionally high accuracy in rotation and eliminating the need for any further adjustments during rotation. A control system that integrates the sample chamber and rotation mechanism to automate the measurement of angle-resolved X-ray emission spectroscopy has also been developed. This automation substantially streamlines the process of measuring angle-resolved spectra, making it far easier than ever before. Furthermore, the upgraded X-ray emission spectrometer can now also be utilized in diffraction experiments, providing even greater versatility to our research capabilities.
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Affiliation(s)
- Jun Miyawaki
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - Yuka Kosegawa
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - Yoshihisa Harada
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
- Synchrotron Radiation Research Organization, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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5
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Zhang B, Wu X, Luo H, Yan H, Chen Y, Zhou S, Yin J, Zhang K, Liao HG, Wang Q, Zou Y, Qiao Y, Sun SG. Gradient Interphase Engineering Enabled by Anionic Redox for High-Voltage and Long-Life Li-Ion Batteries. J Am Chem Soc 2024; 146:4557-4569. [PMID: 38345667 DOI: 10.1021/jacs.3c11440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
Intelligent utilization of the anionic redox reaction (ARR) in Li-rich cathodes is an advanced strategy for the practical implementation of next-generation high-energy-density rechargeable batteries. However, due to the intrinsic complexity of ARR (e.g., nucleophilic attacks), the instability of the cathode-electrolyte interphase (CEI) on a Li-rich cathode presents more challenges than typical high-voltage cathodes. Here, we manipulate CEI interfacial engineering by introducing an all-fluorinated electrolyte and exploiting its interaction with the nucleophilic attack to construct a gradient CEI containing a pair of fluorinated layers on a Li-rich cathode, delivering enhanced interfacial stability. Negative/detrimental nucleophilic electrolyte decomposition has been efficiently evolved to further reinforce CEI fabrication, resulting in the construction of LiF-based indurated outer shield and fluorinated polymer-based flexible inner sheaths. Gradient interphase engineering dramatically improved the capacity retention of the Li-rich cathode from 43 to 71% after 800 cycles and achieved superior cycling stability in anode-free and pouch-type full cells (98.8% capacity retention, 220 cycles), respectively.
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Affiliation(s)
- Baodan Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China
- Fujian Science & Technology Innovation Laboratory for Energy Materials of China (Tan Kah Kee Innovation Laboratory), Xiamen 361005, PR China
| | - Xiaohong Wu
- Fujian Provincial Key Laboratory of Functional Materials and Applications, Institute of Advanced Energy Materials, School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, P. R. China
| | - Haiyan Luo
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China
| | - Hao Yan
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China
| | - Yilong Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China
| | - Shiyuan Zhou
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China
| | - Jianhua Yin
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China
| | - Kang Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China
| | - Hong-Gang Liao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China
| | - Qingsong Wang
- Bavarian Center for Battery Technology (BayBatt), Department of Chemistry, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany
| | - Yeguo Zou
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China
- Fujian Science & Technology Innovation Laboratory for Energy Materials of China (Tan Kah Kee Innovation Laboratory), Xiamen 361005, PR China
| | - Yu Qiao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China
- Fujian Science & Technology Innovation Laboratory for Energy Materials of China (Tan Kah Kee Innovation Laboratory), Xiamen 361005, PR China
| | - Shi-Gang Sun
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China
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6
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Li Q, Wang H, Wang Y, Sun G, Li Z, Zhang Y, Shao H, Jiang Y, Tang Y, Liang R. Critical Review of Emerging Pre-metallization Technologies for Rechargeable Metal-Ion Batteries. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2306262. [PMID: 37775338 DOI: 10.1002/smll.202306262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 09/15/2023] [Indexed: 10/01/2023]
Abstract
Low Coulombic efficiency, low-capacity retention, and short cycle life are the primary challenges faced by various metal-ion batteries due to the loss of corresponding active metal. Practically, these issues can be significantly ameliorated by compensating for the loss of active metals using pre-metallization techniques. Herein, the state-of-the-art development in various pr-emetallization techniques is summarized. First, the origin of pre-metallization is elaborated and the Coulombic efficiency of different battery materials is compared. Second, different pre-metallization strategies, including direct physical contact, chemical strategies, electrochemical method, overmetallized approach, and the use of electrode additives are summarized. Third, the impact of pre-metallization on batteries, along with its role in improving Coulombic efficiency is discussed. Fourth, the various characterization techniques required for mechanistic studies in this field are outlined, from laboratory-level experiments to large scientific device. Finally, the current challenges and future opportunities of pre-metallization technology in improving Coulombic efficiency and cycle stability for various metal-ion batteries are discussed. In particular, the positive influence of pre-metallization reagents is emphasized in the anode-free battery systems. It is envisioned that this review will inspire the development of high-performance energy storage systems via the effective pre-metallization technologies.
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Affiliation(s)
- Qingyuan Li
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Macau SAR, 999078, China
| | - Huibo Wang
- Qingyuan Innovation Laboratory, Quanzhou, 362801, China
- College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, China
| | - Yueyang Wang
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Macau SAR, 999078, China
| | - Guoxing Sun
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Macau SAR, 999078, China
| | - Zongjin Li
- Department of Engineering Science, Faculty of Innovation Engineering, Macau University of Science and Technology, Avenida Wai Long, Taipa, Macau SAR, 999078, China
| | - Yanyan Zhang
- College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, China
| | - Huaiyu Shao
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Macau SAR, 999078, China
| | - Yinzhu Jiang
- School of Materials Science and Engineering, ZJU-Hangzhou Global Scientific and Technological Innovation Centre, Zhejiang University, Hangzhou, 310027, China
- State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization, Baotou Research Institute of Rare Earths, Baotou, 014030, China
| | - Yuxin Tang
- Qingyuan Innovation Laboratory, Quanzhou, 362801, China
- College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, China
| | - Rui Liang
- Department of Engineering Science, Faculty of Innovation Engineering, Macau University of Science and Technology, Avenida Wai Long, Taipa, Macau SAR, 999078, China
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Lu Z, Zhang J, Zhang Q, Wong D, Yin W, Zhang N, Chen Z, Gu L, Hu Z, Liu X. Oxygen Anion Redox Chemistry Correlated with Spin State in Ni-Rich Layered Cathodes. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2206442. [PMID: 36698260 PMCID: PMC10037688 DOI: 10.1002/advs.202206442] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 12/27/2022] [Indexed: 06/17/2023]
Abstract
Despite the low cost and high capacity of Ni-rich layered oxides (NRLOs), their widespread implementation in electric vehicles is hindered by capacity decay and O release. These issues originate from chemo-mechanical heterogeneity, which is mainly related to oxygen anion redox (OAR). However, what to tune regarding OAR in NRLOs and how to tune it remains unknown. In this study, a close correlation between the OAR chemistry and Li/Ni antisite defects is revealed. Experiments and calculations show the opposite effects of aggregative and dispersive Li/Ni antisite defects on the NiO6 configuration and Ni spin state in NRLOs. The resulting broad or narrow spans for the energy bands caused by spin states lead to different OAR chemistries. By tuning the Li/Ni antisite defects to be dispersive rather than aggregative, the threshold voltage for triggering OAR is obviously elevated, and the generation of bulk-O2 -like species and O2 release at phase transition nodes is fundamentally restrained. The OAR is regulated from irreversible to reversible, fundamentally addressing structural degradation and heterogeneity. This study reveals the interaction of the Li/Ni antisite defect/OAR chemistry/chemo-mechanical heterogeneity and presents some insights into the design of high-performance NRLO cathodes.
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Affiliation(s)
- Zhihua Lu
- Center of Materials Science and Optoelectronics EngineeringCollege of Materials Science and Optoelectronic TechnologyUniversity of Chinese Academy of SciencesBeijing100049P. R. China
| | - Jicheng Zhang
- Center of Materials Science and Optoelectronics EngineeringCollege of Materials Science and Optoelectronic TechnologyUniversity of Chinese Academy of SciencesBeijing100049P. R. China
| | - Qinghua Zhang
- Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of ScienceBeijing100190P. R. China
| | - Deniz Wong
- Dynamics and Transport in Quantum MaterialsHelmholtz‐Zentrum Berlin für Materialen und EnergieAlbert‐Einstein‐Strasse 1512489BerlinGermany
| | - Wen Yin
- Spallation Neutron Source Science CenterDongguan523803P. R. China
| | - Nian Zhang
- Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai200050P. R. China
| | - Zhongjun Chen
- Lirong ZhengBeijing Synchrotron Radiation FacilityInstitute of High Energy PhysicsChinese Academy of SciencesBeijing100049China
| | - Lin Gu
- Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of ScienceBeijing100190P. R. China
| | - Zhongbo Hu
- Center of Materials Science and Optoelectronics EngineeringCollege of Materials Science and Optoelectronic TechnologyUniversity of Chinese Academy of SciencesBeijing100049P. R. China
| | - Xiangfeng Liu
- Center of Materials Science and Optoelectronics EngineeringCollege of Materials Science and Optoelectronic TechnologyUniversity of Chinese Academy of SciencesBeijing100049P. R. China
- CAS Center for Excellence in Topological Quantum ComputationUniversity of Chinese Academy of SciencesBeijing100190China
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8
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Chai K, Zhang J, Li Q, Wong D, Zheng L, Schulz C, Bartkowiak M, Smirnov D, Liu X. Facilitating Reversible Cation Migration and Suppressing O 2 Escape for High Performance Li-Rich Oxide Cathodes. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2201014. [PMID: 35373917 DOI: 10.1002/smll.202201014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 03/21/2022] [Indexed: 06/14/2023]
Abstract
High-capacity Li-rich Mn-based oxide cathodes show a great potential in next generation Li-ion batteries but suffer from some critical issues, such as, lattice oxygen escape, irreversible transition metal (TM) cation migration, and voltage decay. Herein, a comprehensive structural modulation in the bulk and surface of Li-rich cathodes is proposed through simultaneously introducing oxygen vacancies and P doping to mitigate these issues, and the improvement mechanism is revealed. First, oxygen vacancies and P doping elongates OO distance, which lowers the energy barrier and enhances the reversible cation migration. Second, reversible cation migration elevates the discharge voltage, inhibits voltage decay and lattice oxygen escape by increasing the Li vacancy-TM antisite at charge, and decreasing the trapped cations at discharge. Third, oxygen vacancies vary the lattice arrangement on the surface from a layered lattice to a spinel phase, which deactivates oxygen redox and restrains oxygen gas (O2 ) escape. Fourth, P doping enhances the covalency between cations and anions and elevates lattice stability in bulk. The modulated Li-rich cathode exhibits a high-rate capability, a good cycling stability, a restrained voltage decay, and an elevated working voltage. This study presents insights into regulating oxygen redox by facilitating reversible cation migration and suppressing O2 escape.
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Affiliation(s)
- Ke Chai
- Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
- Sino-Danish College, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Jicheng Zhang
- Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Qingyuan Li
- Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Deniz Wong
- Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, D-14109, Berlin, Germany
| | - Lirong Zheng
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Christian Schulz
- Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, D-14109, Berlin, Germany
| | - Maciej Bartkowiak
- Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, D-14109, Berlin, Germany
| | - Dmitry Smirnov
- Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, D-14109, Berlin, Germany
| | - Xiangfeng Liu
- Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
- Sino-Danish College, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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9
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Improving the oxygen redox reversibility of Li-rich battery cathode materials via Coulombic repulsive interactions strategy. Nat Commun 2022; 13:1123. [PMID: 35236854 PMCID: PMC8891320 DOI: 10.1038/s41467-022-28793-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Accepted: 02/11/2022] [Indexed: 11/21/2022] Open
Abstract
The oxygen redox reaction in lithium-rich layered oxide battery cathode materials generates extra capacity at high cell voltages (i.e., >4.5 V). However, the irreversible oxygen release causes transition metal (TM) dissolution, migration and cell voltage decay. To circumvent these issues, we introduce a strategy for tuning the Coulombic interactions in a model Li-rich positive electrode active material, i.e., Li1.2Mn0.6Ni0.2O2. In particular, we tune the Coulombic repulsive interactions to obtain an adaptable crystal structure that enables the reversible distortion of TMO6 octahedron and mitigates TM dissolution and migration. Moreover, this strategy hinders the irreversible release of oxygen and other parasitic reactions (e.g., electrolyte decomposition) commonly occurring at high voltages. When tested in non-aqueous coin cell configuration, the modified Li-rich cathode material, combined with a Li metal anode, enables a stable cell discharge capacity of about 240 mAh g−1 for 120 cycles at 50 mA g−1 and a slower voltage decay compared to the unmodified Li1.2Mn0.6Ni0.2O2. Tailoring the oxygen redox reactivity in Li-rich cathode is crucial for developing high-energy batteries. Here, the authors report a strategy to obtain a flexible crystal structure and enhance the oxygen redox reversibility.
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Kong W, Zhang J, Wong D, Yang W, Yang J, Schulz C, Liu X. Tailoring Co3d and O2p Band Centers to Inhibit Oxygen Escape for Stable 4.6 V LiCoO
2
Cathodes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202112508] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Weijin Kong
- Center of Materials Science and Optoelectronics Engineering College of Materials Science and Optoelectronic Technology University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Jicheng Zhang
- Center of Materials Science and Optoelectronics Engineering College of Materials Science and Optoelectronic Technology University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Deniz Wong
- Helmholtz-Center Berlin for Materials and Energy Hahn-Meitner-Platz 1 14109 Berlin Germany
| | - Wenyun Yang
- State Key Laboratory for Mesoscopic Physics School of Physics Peking University Beijing 100871 China
| | - Jinbo Yang
- State Key Laboratory for Mesoscopic Physics School of Physics Peking University Beijing 100871 China
| | - Christian Schulz
- Helmholtz-Center Berlin for Materials and Energy Hahn-Meitner-Platz 1 14109 Berlin Germany
| | - Xiangfeng Liu
- Center of Materials Science and Optoelectronics Engineering College of Materials Science and Optoelectronic Technology University of Chinese Academy of Sciences Beijing 100049 P. R. China
- CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of Sciences Beijing 100190 China
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11
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Kong W, Zhang J, Wong D, Yang W, Yang J, Schulz C, Liu X. Tailoring Co3d and O2p Band Centers to Inhibit Oxygen Escape for Stable 4.6 V LiCoO 2 Cathodes. Angew Chem Int Ed Engl 2021; 60:27102-27112. [PMID: 34668282 DOI: 10.1002/anie.202112508] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Indexed: 11/09/2022]
Abstract
High-voltage LiCoO2 delivers a high capacity but sharp fading is a critical issue, and the capacity decay mechanism is also poorly understood. Herein, we clarify that the escape of surface oxygen and Li-insulator Co3 O4 formation are the main causes for the capacity fading of 4.6 V LiCoO2 . We propose the inhibition of the oxygen escape for achieving stable 4.6 V LiCoO2 by tailoring the Co3d and O2p band center and enlarging their band gap with MgF2 doping. This enhances the ionicity of the Co-O bond and the redox activity of Co and improves cation migration reversibility. The inhibition of oxygen escape suppresses the formation of Li-insulator Co3 O4 and maintains the surface structure integrity. Mg acts as a pillar, providing a stable and enlarged channel for fast Li+ intercalation/extraction. The modulated LiCoO2 shows almost zero strain and achieves a record capacity retention at 4.6 V: 92 % after 100 cycles at 1C and 86.4 % after 1000 cycles at 5C.
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Affiliation(s)
- Weijin Kong
- Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Jicheng Zhang
- Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Deniz Wong
- Helmholtz-Center Berlin for Materials and Energy, Hahn-Meitner-Platz 1, 14109, Berlin, Germany
| | - Wenyun Yang
- State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing, 100871, China
| | - Jinbo Yang
- State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing, 100871, China
| | - Christian Schulz
- Helmholtz-Center Berlin for Materials and Energy, Hahn-Meitner-Platz 1, 14109, Berlin, Germany
| | - Xiangfeng Liu
- Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.,CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing, 100190, China
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12
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Singh A, Huang HY, Chu YY, Hua CY, Lin SW, Fung HS, Shiu HW, Chang J, Li JH, Okamoto J, Chiu CC, Chang CH, Wu WB, Perng SY, Chung SC, Kao KY, Yeh SC, Chao HY, Chen JH, Huang DJ, Chen CT. Development of the Soft X-ray AGM-AGS RIXS beamline at the Taiwan Photon Source. JOURNAL OF SYNCHROTRON RADIATION 2021; 28:977-986. [PMID: 33950006 PMCID: PMC8127366 DOI: 10.1107/s1600577521002897] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 03/18/2021] [Indexed: 06/01/2023]
Abstract
We report on the development of a high-resolution and highly efficient beamline for soft X-ray resonant inelastic X-ray scattering (RIXS) located at the Taiwan Photon Source. This beamline adopts an optical design that uses an active grating monochromator (AGM) and an active grating spectrometer (AGS) to implement the energy compensation principle of grating dispersion. Active gratings are utilized to diminish defocus, coma and higher-order aberrations, as well as to decrease the slope errors caused by thermal deformation and optical polishing. The AGS is mounted on a rotatable granite platform to enable momentum-resolved RIXS measurements with scattering angles over a wide range. Several high-precision instruments developed in-house for this beamline are described briefly. The best energy resolution obtained from this AGM-AGS beamline was 12.4 meV at 530 eV, achieving a resolving power of 4.2 × 104, while the bandwidth of the incident soft X-rays was kept at 0.5 eV. To demonstrate the scientific impact of high-resolution RIXS, we present an example of momentum-resolved RIXS measurements on a high-temperature superconducting cuprate, i.e. La2-xSrxCuO4. The measurements reveal the A1g buckling phonons in superconducting cuprates, opening a new opportunity to investigate the coupling between these phonons and charge-density waves.
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Affiliation(s)
- A. Singh
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - H. Y. Huang
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - Y. Y. Chu
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - C. Y. Hua
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - S. W. Lin
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - H. S. Fung
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - H. W. Shiu
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - J. Chang
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - J. H. Li
- Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - J. Okamoto
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - C. C. Chiu
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - C. H. Chang
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - W. B. Wu
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - S. Y. Perng
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - S. C. Chung
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - K. Y. Kao
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - S. C. Yeh
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - H. Y. Chao
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - J. H. Chen
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - D. J. Huang
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
- Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - C. T. Chen
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
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Ren J, Lin L, Lieutenant K, Schulz C, Wong D, Gimm T, Bande A, Wang X, Petit T. Role of Dopants on the Local Electronic Structure of Polymeric Carbon Nitride Photocatalysts. SMALL METHODS 2021; 5:e2000707. [PMID: 34927893 DOI: 10.1002/smtd.202000707] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 10/02/2020] [Indexed: 06/14/2023]
Abstract
Polymeric carbon nitride (PCN) is a promising class of materials for solar-to-chemical energy conversion. The increase of the photocatalytic activity of PCN is often achieved by the incorporation of heteroatoms, whose impact on the electronic structure of PCN remains poorly explored. This work reveals that the local electronic structure of PCN is strongly altered by doping with sulfur and iron using X-ray absorption spectroscopy (XAS) and resonant inelastic X-ray scattering (RIXS). From XAS at the carbon and nitrogen K-edges, sulfur atoms are found to mostly affect carbon atoms, in contrast to iron doping mostly altering nitrogen sites. In RIXS at the nitrogen K-edge, a vibrational progression, affected by iron doping, is evidenced, which is attributed to a vibronic coupling between excited electrons in nitrogen atoms and C-N stretching modes in PCN heterocycling rings. This work opens new perspectives for the characterization of vibronic coupling in polymeric photocatalysts.
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Affiliation(s)
- Jian Ren
- Institute for Nanospectroscopy, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Straße 15, Berlin, 12489, Germany
- Department of Physics, Freie Universität Berlin, Arnimallee 14, Berlin, 14195, Germany
| | - Lihua Lin
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350002, China
| | - Klaus Lieutenant
- Department of Methods for Characterization of Transport Phenomena in Energy Materials, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Straße 15, Berlin, 12489, Germany
| | - Christian Schulz
- Department of Methods for Characterization of Transport Phenomena in Energy Materials, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Straße 15, Berlin, 12489, Germany
| | - Deniz Wong
- Department of Methods for Characterization of Transport Phenomena in Energy Materials, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Straße 15, Berlin, 12489, Germany
| | - Thorren Gimm
- Joint Research Group Simulation of Energy Materials, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner-Platz 1, Berlin, 14109, Germany
| | - Annika Bande
- Young Investigator Group Theory of Electron Dynamics and Spectroscopy, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner-Platz 1, Berlin, 14109, Germany
| | - Xinchen Wang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350002, China
| | - Tristan Petit
- Institute for Nanospectroscopy, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Straße 15, Berlin, 12489, Germany
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