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Fluorine gradient-doped LiNi0.5Mn1.5O4 spinel with improved high voltage stability for Li-ion batteries
Luo, Y; Li, HY; Lu, TL; Zhang, YX; Mao, SS; Liu, Z; Wen, W; Xie, JY; Yan, LQ
2017
Source PublicationELECTROCHIMICA ACTA
ISSN0013-4686
Volume238Issue:-Pages:237-245
Subtype期刊论文
AbstractThe fluorine gradient-doped LiNi0.5Mn1.5O4 spinels are synthesized by a facile one-step method and the effect of heat treatment on their structure, morphology, and electrochemical performance are investigated. The results show that introduction of fluorine leads to a larger lattice parameter and particle size, and the formation of F-enriched surface. Whereas at 400 degrees C, the fluorine gradient-doped LiNi0.5Mn1.5O4 sample exhibits an improved long-term cycling stability and high rate performance, due to` the suppression of the reaction between electrolyte and cathode, resulting in a decrease in the total resistance and the formation of a thin, uniform and smooth film on the surface. As a result of in situ XRD with charged pristine and the fluorine gradient-doped samples, the similar thermal-decomposition pathways from the charged spinel to the final NiMn2O4-type spinel structure with a small amount of NiMnO3 and alpha-Mn2O3 are observed. In addition, the disappearance temperature of the charged spinel structures is at about 280 degrees C for the fluorine gradient-doped sample, exhibiting an improved thermal stability of high voltage cathode material. These results show that fluorine gradient-doped LiNi0.5Mn1.5O4 sample is a promising positive electrode material for high performance lithium ion batteries. (C) 2017 Elsevier Ltd. All rights reserved.
KeywordElectrochemical Performance Cathode Material Thermal-stability Surface Modification Limn1.5ni0.5-xmxo4 m Rate Capability Lithium Cation Electrodes Fe
DOI10.1016/j.electacta.2017.04.043
WOS KeywordELECTROCHEMICAL PERFORMANCE ; CATHODE MATERIAL ; THERMAL-STABILITY ; SURFACE MODIFICATION ; LIMN1.5NI0.5-XMXO4 M ; RATE CAPABILITY ; LITHIUM ; CATION ; ELECTRODES ; FE
Indexed BySCI
Language英语
WOS IDWOS:000401113500027
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/28661
Collection中科院上海应用物理研究所2011-2018年
Recommended Citation
GB/T 7714
Luo, Y,Li, HY,Lu, TL,et al. Fluorine gradient-doped LiNi0.5Mn1.5O4 spinel with improved high voltage stability for Li-ion batteries[J]. ELECTROCHIMICA ACTA,2017,238(-):237-245.
APA Luo, Y.,Li, HY.,Lu, TL.,Zhang, YX.,Mao, SS.,...&Yan, LQ.(2017).Fluorine gradient-doped LiNi0.5Mn1.5O4 spinel with improved high voltage stability for Li-ion batteries.ELECTROCHIMICA ACTA,238(-),237-245.
MLA Luo, Y,et al."Fluorine gradient-doped LiNi0.5Mn1.5O4 spinel with improved high voltage stability for Li-ion batteries".ELECTROCHIMICA ACTA 238.-(2017):237-245.
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