期刊
MATERIALS LETTERS
卷 253, 期 -, 页码 136-139出版社
ELSEVIER
DOI: 10.1016/j.matlet.2019.06.062
关键词
Oxidation; LiNi0.5Mn1.5O4; Rate performance; Energy storage and conversion
资金
- National Natural Science Foundation of China [51774002, 21773060]
- Fundamental Research Funds for the Central Universities [N182304014]
- Natural Science Foundation of Heilongjiang Province [E2016056]
- Young Scholar Project of Long Jiang Scholars Program [Q201818]
LiNi0.5Mn1.5O4 (LNMO) and V2O5-modified LNMO materials with P4(3)32 structure were prepared by ethanol assisted co-precipitation process. The discharge capacities of V2O5-coated LiNi0.5Mn1.5O4 is 131.4, 122, 111.1 93.8 and 52.1 mAh g(-1) at 0.2, 0.5, 1, 2 and 5 C charge-discharge rates, respectively. The discharge capacities of pristine LNMO are only 125.7, 107.3, 86.2, 69.7 and 37.6 mAh g(-1) at homologous rates. The V2O5 modification can be considered as an efficient way to enhance the rate capability of LNMO. The improved rate capability of V2O5-coated LNMO material could be ascribed to the enhanced lithium-ions diffusion coefficient and reduced charge-transfer reaction resistance. (C) 2019 Elsevier B.V. All rights reserved.
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