期刊
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
卷 2021, 期 13, 页码 1256-1262出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.202001159
关键词
Cathode materials; Doping; Electrochemistry; Manganese; Sodium-ion batteries
资金
- National Natural Science Foundation of China [21701079, 21801109]
- Shandong Provincial Natural Science Foundation for Doctors Scholar [ZR2018BB019, ZR2018BB001]
Na3V2O2(PO4)(2)F, as a promising cathode material for sodium-ion batteries, has high voltage and theoretical energy density but low electrical conductivity. Mn-doping, leading to the successful synthesis of NVMOPF-0.050, significantly improves the electrochemical performance of these materials in sodium ion batteries.
Na3V2O2(PO4)(2)F (marked as NVOPF) is a promising cathode material for sodium-ion batteries owing to its high voltage and theoretical energy density, while the low electrical conductivity hinders its practical applications. Ion-doping could effectively improve electronic conductivity and structural stability of these materials. In this study, Mn-doping Na3V2-xMnxO2(PO4)(2)F (0 <= x <= 0.15) hollow microspheres were successfully synthesized by hydrothermal method in the presence of H2O2. Among these obtained materials, NVMOPF-0.050 exhibits the best electrochemical performance with initial discharge capacity of 118 mAh g(-1) and 61 mAh g(-1) at 0.1 C and 2 C as cathode material for sodium ion batteries. Excellent performance can be attributed to the hollow spherical architecture, and good structural stability.
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