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Li M, Wu J, You Z, Dai Z, Gu Y, Shi L, Wu M, Wen Z. Crown Ether Electrolyte Induced Li 2O 2 Amorphization for Low Polarization and Long Lifespan Li-O 2 Batteries. Angew Chem Int Ed Engl 2024; 63:e202403521. [PMID: 38654696 DOI: 10.1002/anie.202403521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 03/29/2024] [Accepted: 04/22/2024] [Indexed: 04/26/2024]
Abstract
Lithium-oxygen batteries possess an extremely high theoretical energy density, rendering them a prime candidate for next-generation secondary batteries. However, they still face multiple problems such as huge charge polarization and poor life, which lay a significant gap between laboratory research and commercial applications. In this work, we adopt 15-crown-5 ether (C15) as solvent to regulate the generation of discharge products in lithium-oxygen batteries. The coronal structure endows C15 with strong affinity to Li+, firmly stabilizes the intermediate LiO2 and discharge product Li2O2. Thus, the crystalline Li2O2 is amorphized into easily decomposable amorphous products. The lithium-oxygen batteries assembled with 0.5 M C15 electrolyte show an increased discharge capacity from 4.0 mAh cm-2 to 5.7 mAh cm-2 and a low charge overpotential of 0.88 V during the whole lifespan at 0.05 mA cm-2. The batteries with 1 M C15 electrolyte can cycle stably for 140 cycles. Furthermore, the amorphous characteristic of Li2O2 product is preserved when matched with redox mediators such as LiI, with the charge polarization further decreasing to 0.74 V over a cycle life of 190 cycles. This provides new possibilities for electrolyte design to promote Li2O2 amorphization and reduce charge overpotential in lithium-oxygen batteries.
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Affiliation(s)
- Meng Li
- The State Key Lab High Performance Ceram & Superfine Microstructure Shanghai Institute of Ceramics, Chinese Academy of Sciences, 200050, Shanghai, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Science, 100049, Beijing, P. R. China
| | - Jiaxin Wu
- The State Key Lab High Performance Ceram & Superfine Microstructure Shanghai Institute of Ceramics, Chinese Academy of Sciences, 200050, Shanghai, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Science, 100049, Beijing, P. R. China
| | - Zichang You
- The State Key Lab High Performance Ceram & Superfine Microstructure Shanghai Institute of Ceramics, Chinese Academy of Sciences, 200050, Shanghai, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Science, 100049, Beijing, P. R. China
| | - Zhongqin Dai
- The State Key Lab High Performance Ceram & Superfine Microstructure Shanghai Institute of Ceramics, Chinese Academy of Sciences, 200050, Shanghai, P. R. China
| | - Yuanfan Gu
- The State Key Lab High Performance Ceram & Superfine Microstructure Shanghai Institute of Ceramics, Chinese Academy of Sciences, 200050, Shanghai, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Science, 100049, Beijing, P. R. China
| | - Lei Shi
- The State Key Lab High Performance Ceram & Superfine Microstructure Shanghai Institute of Ceramics, Chinese Academy of Sciences, 200050, Shanghai, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Science, 100049, Beijing, P. R. China
| | - Meifen Wu
- The State Key Lab High Performance Ceram & Superfine Microstructure Shanghai Institute of Ceramics, Chinese Academy of Sciences, 200050, Shanghai, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Science, 100049, Beijing, P. R. China
| | - Zhaoyin Wen
- The State Key Lab High Performance Ceram & Superfine Microstructure Shanghai Institute of Ceramics, Chinese Academy of Sciences, 200050, Shanghai, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Science, 100049, Beijing, P. R. China
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Yang F, Armentrout PB. Periodic trends in the hydration energies and critical sizes of alkaline earth and transition metal dication water complexes. MASS SPECTROMETRY REVIEWS 2023:e21830. [PMID: 36644985 DOI: 10.1002/mas.21830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 11/19/2022] [Accepted: 12/16/2022] [Indexed: 06/17/2023]
Abstract
This review encompasses guided ion beam tandem mass spectrometry studies of hydrated metal dication complexes. Metals include the Group 2 alkaline earths (Mg, Ca, Sr, and Ba), late first-row transition metals (Mn, Fe, Co, Ni, Cu, and Zn), along with Cd. In all cases, threshold collision-induced dissociation experiments are used to quantitatively determine the sequential hydration energies for M2+ (H2 O)x complexes ranging in size from one to 11 water molecules. Periodic trends in these bond dissociation energies are examined and discussed. Values are compared to other experimental results when available. In addition to dissociation by simple water ligand loss, complexes at a select size (which differs from metal to metal) are also observed to undergo charge separation to yield a hydrated metal hydroxide cation and a hydrated proton. This leads to the concept of a critical size, xcrit , and the periodic trends in this value are also discussed.
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Affiliation(s)
- Fan Yang
- Department of Chemistry, University of Utah, Salt Lake City, Utah, USA
| | - P B Armentrout
- Department of Chemistry, University of Utah, Salt Lake City, Utah, USA
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Demissie EG, Lam WK, Thompson H, Tang WK, Siu CK. Decomposition of nitrous oxide in hydrated cobalt(I) clusters: a theoretical insight into the mechanistic roles of ligand-binding modes. Phys Chem Chem Phys 2021; 23:16816-16826. [PMID: 34323905 DOI: 10.1039/d1cp01820e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydrated cobalt(i) cluster ions, [Co(H2O)n]+, can decompose the inert nitrous oxide molecule, N2O. Density functional theory suggests that N2O can anchor to Co+ of [Co(N2O)(H2O)n]+ through either O end-on (η1-OL) or N end-on (η1-NL) coordinate mode. The latter is thermodynamically more favorable resulting from a subtle π backdonation from Co+ to N2O. N2O decomposition involves two major processes: (1) redox reaction and (2) N-O bond dissociation. The initial activation of N2O through an electron transfer from Co+ to N2O yields anionic N2O-, which binds to the metal center of [Co2+(N2O-)(H2O)n] also through either O end-on (η1-O) or N end-on (η1-N) mode and is stabilized by water molecules through hydrogen bonding. From η1-O, subsequent N-O bond dissociation to liberate N2, producing [CoO(H2O)n]+, is straightforward via a mechanism that is commonplace for typical metal-catalyzed N2O decompositions. Unexpectedly, the N-O bond dissociation directly from η1-N is also possible and eliminates both N2 and OH, explaining the formation of [CoOH(H2O)n]+ as observed in a previous experimental study. Interestingly, formation of [CoO(H2O)n]+ is kinetically controlled by the initial redox process between Co+ and the O-bound N2O, the activation barriers of which in large water clusters (n ≥ 14) are higher than that of the unexpected N-O bond dissociation from the N-bound structure forming [CoOH(H2O)n]+. This theoretical discovery implies that in the present of water molecules, the metal-catalyzed N2O decomposition starting from an O-bound metal complex is not mandatory.
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Affiliation(s)
- Ephrem G Demissie
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong SAR, P. R. China.
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Li M, Ren G, Yang W, Wang F, Ma N, Fan X, Pan Q. Modulation of High-Spin Co(II) in Li/Co-MOFs as Efficient Fenton-like Catalysts. Inorg Chem 2021; 60:12405-12412. [PMID: 34296855 DOI: 10.1021/acs.inorgchem.1c01632] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Developing high-performance catalysts toward the Fenton reaction is important for environmental protection and sustainable development, yet it is still challenging. The high-spin states of first-row transition metal atoms with tetrahedral coordination provide a flexible electronic environment to activate the catalyst and elevate its catalytic activity. As a type of material with adjustable structures, metal-organic frameworks (MOFs) are excellent candidate catalysts as they can accurately regulate the coordination configurations of metal ions. In this paper, we investigate and summarize the direct formation of bimetallic carboxylate Li/Co-MOFs with tetrahedral coordination metal centers in a mixed H2O/polar organic solvent system. The induction of Li(I) ions is manifested in the generation of hydroxides during the dissociation of the Co(II) solvation structure to trigger the tetrahedral coordination behavior of Co(II). These Li/Co-MOFs containing high-spin Co(II) centers can serve as highly efficient Fenton-like catalysts for organics. This study provides a promising strategy for rational design of MOF-based catalysts with high-spin metal centers for application in environment governance.
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Affiliation(s)
- Meiling Li
- Key Laboratory of Advanced Materials of Tropical Island Resources, Ministry of Education, College of Science, Hainan University, Haikou 570228, China
- School of Chemical Engineering and Technology, Hainan University, Haikou 570228, China
| | - Guojian Ren
- Key Laboratory of Advanced Materials of Tropical Island Resources, Ministry of Education, College of Science, Hainan University, Haikou 570228, China
| | - Weiting Yang
- Key Laboratory of Advanced Materials of Tropical Island Resources, Ministry of Education, College of Science, Hainan University, Haikou 570228, China
| | - Fuxiang Wang
- Key Laboratory of Advanced Materials of Tropical Island Resources, Ministry of Education, College of Science, Hainan University, Haikou 570228, China
| | - Nana Ma
- College of Chemistry and Chemical Engineering, Henan Normal University, XinXiang 453007, China
| | - Xiaolei Fan
- Department of Chemical Engineering and Analytical Science, School of Engineering, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Qinhe Pan
- Key Laboratory of Advanced Materials of Tropical Island Resources, Ministry of Education, College of Science, Hainan University, Haikou 570228, China
- School of Chemical Engineering and Technology, Hainan University, Haikou 570228, China
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Sander O, Armentrout PB. Hydration Energies of Iron Hydroxide Cation: A Guided Ion Beam and Theoretical Investigation. J Phys Chem A 2019; 123:1675-1688. [DOI: 10.1021/acs.jpca.8b12257] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Oxana Sander
- Fachbereich Chemie, Technische Universität Darmstadt, Alarich-Weiss-Straße 8, 64287 Darmstadt, Germany
| | - P. B. Armentrout
- Department of Chemistry, University of Utah, 315 South 1400 East, Room 2020, Salt Lake City, Utah 84112, United States
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Coates RA, Armentrout PB. Binding energies of hydrated cobalt(ii) by collision-induced dissociation and theoretical studies: evidence for a new critical size. Phys Chem Chem Phys 2018; 20:802-818. [PMID: 29210383 DOI: 10.1039/c7cp05828d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The experimental sequential bond energies for loss of water from Co2+(H2O)x complexes, x = 5-11, are determined by threshold collision-induced dissociation (TCID) using a guided ion beam tandem mass spectrometer with a thermal electrospray ionization source. Kinetic energy dependent TCID cross sections are analyzed to yield 0 K thresholds for sequential loss of neutral water molecules. The thresholds are converted from 0 to 298 K values to give hydration enthalpies and free energies. Theoretical geometry optimizations and single point energy calculations at several levels of theory are performed for the reactant and product ion complexes. Theoretical bond energies for ground structures are used for direct comparison with experimental values to obtain structural information on these complexes. In addition, the dissociative charge separation process, Co2+(H2O)x → CoOH+(H2O)m + H+(H2O)x-m-1, is observed at x = 4, 6, and 7 in competition with primary water loss products. Energies for the charge separation rate-limiting transition states are calculated and compared to experimental threshold measurements. Results suggest that the critical size for which charge separation is energetically favored over water loss is xcrit = 6, in contrast to lower values in previous literature reports.
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Affiliation(s)
- Rebecca A Coates
- Department of Chemistry, University of Utah, 315 S. 1400 E. Rm 2020, Salt Lake City, UT 84112, USA.
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