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Molten-Salt-Assisted Strategy Enables High-Rate Micron-Sized Single-Crystal Li-Rich, Mn-Based Layered Oxide Cathode Materials.
Liu, Kailin; Zhang, Qiangfeng; Lu, Zheng; Zhu, Haipeng; Song, Miao; Chen, Libao; Zhang, Chunxiao; Wei, Weifeng.
Afiliación
  • Liu K; Powder Metallurgy Research Institute, Central South University, Changsha, Hunan 410083, P. R. China.
  • Zhang Q; State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, P. R. China.
  • Lu Z; Powder Metallurgy Research Institute, Central South University, Changsha, Hunan 410083, P. R. China.
  • Zhu H; State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, P. R. China.
  • Song M; Powder Metallurgy Research Institute, Central South University, Changsha, Hunan 410083, P. R. China.
  • Chen L; State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, P. R. China.
  • Zhang C; Powder Metallurgy Research Institute, Central South University, Changsha, Hunan 410083, P. R. China.
  • Wei W; State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, P. R. China.
ACS Appl Mater Interfaces ; 16(12): 14902-14911, 2024 Mar 27.
Article en En | MEDLINE | ID: mdl-38484086
ABSTRACT
Li-rich Mn-based layered oxides (LMLOs) are expected to be the most promising high-capacity cathodes for the next generation of lithium-ion batteries (LIBs). However, the poor cycling stability and kinetics performance of polycrystalline LMLOs restrict their practical applications due to the anisotropic lattice stress and crack propagation during cycling. Herein, B-doped micron-sized single-crystal Co-free LMLOs were obtained by molten-salt (LiNO3 and H3BO3)-assisted sintering. The results reveal that the low-melting-point molten salt can serve as liquid-phase media to improve the efficiency of atomic mass transfer and crystal nucleation and growth. The modified single-crystal LMLO cathodes can resist the accumulation of anisotropic stress and strain during the cycling and reduce interface side reactions, thus achieving excellent high-voltage stability and kinetics performance. The reversible specific capacity of the single crystals is 210.8 mAh g-1 at 1C with a voltage decay rate of 1.95 mV/cycle and up to 161.1 mAh g-1 at 10C with a capacity retention of 81.06% after 200 cycles.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Appl Mater Interfaces Asunto de la revista: BIOTECNOLOGIA / ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article Pais de publicación: Estados Unidos
Texto completo
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XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Appl Mater Interfaces Asunto de la revista: BIOTECNOLOGIA / ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article Pais de publicación: Estados Unidos