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Zhao Z, Zhang H, Li F, Zhao L, Li Q, Li H. Understanding the Predominant Potassium-Ion Intercalation Mechanism of Single-Phased Bimetal Oxides by in Situ Magnetometry. NANO LETTERS 2022; 22:10102-10110. [PMID: 36475731 DOI: 10.1021/acs.nanolett.2c03849] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The electrochemical performance of electrode materials is largely dependent on the structural and chemical evolutions during the charge-discharge processes. Hence, revealing ion storage chemistry could enlighten mechanistic understanding and offer guidance for rational design for energy storage materials. Here, we investigate the mechanisms of potassium (K)-ion storage in the promising bimetal oxide materials by in situ magnetometry. We focus on a single-phased hollow FeTiO3 (SPH-FTO) hexagonal prism synthesized through a complexing-reagent assisted approach and find that the K-ion storage in this compound occurs predominantly with an intercalation mechanism and fractionally a conversion mechanism. We also demonstrate a K-ion hybrid capacitor assembled with the prepared SPH-FTO hexagonal prism anode and activated carbon cathode, delivering a high energy density and high power density as well as extraordinary cycling stability. This new understanding is used to showcase the inherently high K-ion storage properties from the earth-abundant FeTiO3.
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Affiliation(s)
- Zhongchen Zhao
- College of Physics, Center for Marine Observation and Communications, Qingdao University, Qingdao266071, P. R. China
| | - Hao Zhang
- College of Physics, Center for Marine Observation and Communications, Qingdao University, Qingdao266071, P. R. China
| | - Fei Li
- College of Physics, Center for Marine Observation and Communications, Qingdao University, Qingdao266071, P. R. China
| | - Linyi Zhao
- College of Physics, Center for Marine Observation and Communications, Qingdao University, Qingdao266071, P. R. China
| | - Qiang Li
- College of Physics, Center for Marine Observation and Communications, Qingdao University, Qingdao266071, P. R. China
| | - Hongsen Li
- College of Physics, Center for Marine Observation and Communications, Qingdao University, Qingdao266071, P. R. China
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Kroll T, Baker ML, Wilson SA, Lundberg M, Juhin A, Arrio MA, Yan JJ, Gee LB, Braun A, Weng TC, Sokaras D, Hedman B, Hodgson KO, Solomon EI. Effect of 3d/4p Mixing on 1s2p Resonant Inelastic X-ray Scattering: Electronic Structure of Oxo-Bridged Iron Dimers. J Am Chem Soc 2021; 143:4569-4584. [PMID: 33730507 PMCID: PMC8018712 DOI: 10.1021/jacs.0c11193] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
1s2p resonant inelastic X-ray scattering (1s2p RIXS) has proven successful in the determination of the differential orbital covalency (DOC, the amount of metal vs ligand character in each d molecular orbital) of highly covalent centrosymmetric iron environments including heme models and enzymes. However, many reactive intermediates have noncentrosymmetric environments, e.g., the presence of strong metal-oxo bonds, which results in the mixing of metal 4p character into the 3d orbitals. This leads to significant intensity enhancement in the metal K-pre-edge and as shown here, the associated 1s2p RIXS features, which impact their insight into electronic structure. Binuclear oxo bridged high spin Fe(III) complexes are used to determine the effects of 4p mixing on 1s2p RIXS spectra. In addition to developing the analysis of 4p mixing on K-edge XAS and 1s2p RIXS data, this study explains the selective nature of the 4p mixing that also enhances the analysis of L-edge XAS intensity in terms of DOC. These 1s2p RIXS biferric model studies enable new structural insight from related data on peroxo bridged biferric enzyme intermediates. The dimeric nature of the oxo bridged Fe(III) complexes further results in ligand-to-ligand interactions between the Fe(III) sites and angle dependent features just above the pre-edge that reflect the superexchange pathway of the oxo bridge. Finally, we present a methodology that enables DOC to be obtained when L-edge XAS is inaccessible and only 1s2p RIXS experiments can be performed as in many metalloenzyme intermediates in solution.
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Affiliation(s)
- Thomas Kroll
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Michael L Baker
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
- Department of Chemistry, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Samuel A Wilson
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Marcus Lundberg
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
- Department of Chemistry - Ångström Laboratory, Uppsala University, SE-751 20 Uppsala, Sweden
| | - Amélie Juhin
- CNRS, Sorbonne Université, UMR7590, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC) Univ Paris 06, Muséum National d'Histoire Naturelle, IRD UMR206, 4 Place Jussieu, F-75005 Paris, France
| | - Marie-Anne Arrio
- CNRS, Sorbonne Université, UMR7590, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC) Univ Paris 06, Muséum National d'Histoire Naturelle, IRD UMR206, 4 Place Jussieu, F-75005 Paris, France
| | - James J Yan
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Leland B Gee
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Augustin Braun
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Tsu-Chien Weng
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Dimosthenis Sokaras
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Britt Hedman
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Keith O Hodgson
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Edward I Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
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Rohringer N. X-ray Raman scattering: a building block for nonlinear spectroscopy. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2019; 377:20170471. [PMID: 30929628 DOI: 10.1098/rsta.2017.0471] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/11/2019] [Indexed: 06/09/2023]
Abstract
Ultraintense X-ray free-electron laser pulses of attosecond duration can enable new nonlinear X-ray spectroscopic techniques to observe coherent electronic motion. The simplest nonlinear X-ray spectroscopic concept is based on stimulated electronic X-ray Raman scattering. We present a snapshot of recent experimental achievements, paving the way towards the goal of realizing nonlinear X-ray spectroscopy. In particular, we review the first proof-of-principle experiments, demonstrating stimulated X-ray emission and scattering in atomic gases in the soft X-ray regime and first results of stimulated hard X-ray emission spectroscopy on transition metal complexes. We critically asses the challenges that have to be overcome for future successful implementation of nonlinear coherent X-ray Raman spectroscopy. This article is part of the theme issue 'Measurement of ultrafast electronic and structural dynamics with X-rays'.
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Affiliation(s)
- Nina Rohringer
- 1 Deutsches Elektronen-Synchrotron (DESY) , 22607 Hamburg , Germany
- 2 Department of Physics , Universität Hamburg , 20355 Hamburg , Germany
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