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Role of Substitution Elements in Enhancing the Structural Stability of Li-Rich Layered Cathodes.
Zhang, Baodan; Zhang, Yiming; Wang, Xiaotong; Liu, Hui; Yan, Yawen; Zhou, Shiyuan; Tang, Yonglin; Zeng, Guifan; Wu, Xiaohong; Liao, Hong-Gang; Qiu, Yongfu; Huang, Huan; Zheng, Lirong; Xu, Juping; Yin, Wen; Huang, Zhongyuan; Xiao, Yinguo; Xie, Qingshui; Peng, Dong-Liang; Li, Chao; Qiao, Yu; Sun, Shi-Gang.
Afiliação
  • Zhang B; 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.
  • Zhang Y; Fujian Science & Technology Innovation Laboratory for Energy Materials of China (Tan Kah Kee Innovation Laboratory), Xiamen 361005, PR China.
  • Wang X; 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.
  • Liu H; 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.
  • Yan Y; Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, PR China.
  • Zhou S; 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.
  • Tang Y; 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.
  • Zeng G; 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.
  • Wu X; 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.
  • Liao HG; 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.
  • Qiu Y; 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.
  • Huang H; School of Environment and Civil Engineering, Dongguan University of Technology, Guangdong 523808, PR China.
  • Zheng L; Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China.
  • Xu J; Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China.
  • Yin W; Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China.
  • Huang Z; Spallation Neutron Source Science Center, Dongguan 523803, China.
  • Xiao Y; Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China.
  • Xie Q; Spallation Neutron Source Science Center, Dongguan 523803, China.
  • Peng DL; School of Advanced Materials, Shenzhen Graduate School, Peking University, Shenzhen 518055, PR China.
  • Li C; School of Advanced Materials, Shenzhen Graduate School, Peking University, Shenzhen 518055, PR China.
  • Qiao Y; College of Materials, Xiamen University, Xiamen 361005, PR China.
  • Sun SG; College of Materials, Xiamen University, Xiamen 361005, PR China.
J Am Chem Soc ; 2023 Apr 07.
Article em En | MEDLINE | ID: mdl-37029335
ABSTRACT
Element doping/substitution has been recognized as an effective strategy to enhance the structural stability of layered cathodes. However, abundant substitution studies not only lack a clear identification of the substitution sites in the material lattice, but the rigid interpretation of the transition metal (TM)-O covalent theory is also not sufficiently convincing, resulting in the doping/substitution proposals being dragged into design blindness. In this work, taking Li1.2Ni0.2Mn0.6O2 as a prototype, the intense correlation between the "disordered degree" (Li/Ni mixing) and interface-structure stability (e.g., TM-O environment, slab/lattice, and Li+ reversibility) is revealed. Specifically, the degree of disorder induced by the Mg/Ti substitution extends in the opposite direction, conducive to sharp differences in the stability of TM-O, Li+ diffusion, and anion redox reversibility, delivering fairly distinct electrochemical performance. Based on the established paradigm of systematic characterization/analysis, the "degree of disorder" has been shown to be a powerful indicator of material modification by element substitution/doping.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2023 Tipo de documento: Article
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2023 Tipo de documento: Article