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Aliovalent-Ion-Induced Lattice Regulation Based on Charge Balance Theory: Advanced Fluorophosphate Cathode for Sodium-Ion Full Batteries.
Gu, Zhen-Yi; Guo, Jin-Zhi; Sun, Zhong-Hui; Zhao, Xin-Xin; Wang, Xiao-Tong; Liang, Hao-Jie; Zhao, Bo; Li, Wen-Hao; Pan, Xiu-Mei; Wu, Xing-Long.
Afiliación
  • Gu ZY; MOE Key Laboratory for UV Light-Emitting Materials and Technology, Northeast Normal University, Changchun, Jilin, 130024, P. R. China.
  • Guo JZ; MOE Key Laboratory for UV Light-Emitting Materials and Technology, Northeast Normal University, Changchun, Jilin, 130024, P. R. China.
  • Sun ZH; Center for Advanced Analytical Science, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Guangdong, 510006, P. R. China.
  • Zhao XX; Department of Chemistry, Northeast Normal University, Changchun, Jilin, 130024, P. R. China.
  • Wang XT; MOE Key Laboratory for UV Light-Emitting Materials and Technology, Northeast Normal University, Changchun, Jilin, 130024, P. R. China.
  • Liang HJ; MOE Key Laboratory for UV Light-Emitting Materials and Technology, Northeast Normal University, Changchun, Jilin, 130024, P. R. China.
  • Zhao B; Department of Chemistry, Northeast Normal University, Changchun, Jilin, 130024, P. R. China.
  • Li WH; MOE Key Laboratory for UV Light-Emitting Materials and Technology, Northeast Normal University, Changchun, Jilin, 130024, P. R. China.
  • Pan XM; Department of Chemistry, Northeast Normal University, Changchun, Jilin, 130024, P. R. China.
  • Wu XL; MOE Key Laboratory for UV Light-Emitting Materials and Technology, Northeast Normal University, Changchun, Jilin, 130024, P. R. China.
Small ; 17(32): e2102010, 2021 Aug.
Article en En | MEDLINE | ID: mdl-34216100
There are still many problems that hinder the development of sodium-ion batteries (SIBs), including poor rate performance, short-term cycle lifespan, and inferior low-temperature property. Herein, excellent Na-storage performance in fluorophosphate (Na3 V2 (PO4 )2 F3 ) cathode is achieved by lattice regulation based on charge balance theory. Lattice regulation of aliovalent Mn2+ for V3+ increases both electronic conductivity and Na+ -migration kinetics. Because of the maintaining of electrical neutrality in the material, aliovalent Mn2+ -introduced leads to the coexistence of V3+ and V4+ from charge balance theory. It decreases the particle size and improves the structural stability, suppressing the large lattice distortion during cathode reaction processes. These multiple effects enhance the specific capacity (123.8 mAh g-1 ), outstanding high-rate (68% capacity retention at 20 C), ultralong cycle (only 0.018% capacity attenuation per cycle over 1000 cycles at 1 C) and low-temperature (96.5% capacity retention after 400 cycles at -25 °C) performances of Mn2+ -induced Na3 V1.98 Mn0.02 (PO4 )2 F3 when used as cathode in SIBs. Importantly, a feasible sodium-ion full battery is assembled, achieving outstanding rate capability and cycle stability. The strategy of aliovalent ion-induced lattice regulation constructs cathode materials with superior performances, which is available to improve other electrode materials for energy storage systems.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Small Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2021 Tipo del documento: Article Pais de publicación: Alemania
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Small Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2021 Tipo del documento: Article Pais de publicación: Alemania