Enhanced Structural and Electrochemical Performance of LiNi0.5Mn1.5O4 Cathode Material by PO43−/Fe3+ Co-Doping
Source abstract
Abstract
Series of PO43−/Fe3+ co-doped samples of LiNi0.5Mn1.5-5/3xFexP2/3xO4 (x = 0.01, 0.02, 0.03, 0.04, 0.05) have been synthesized by the coprecipitation–hydrothermal method, along with high-temperature calcination using FeSO4 and NaH2PO4 as Fe3+ and PO43− sources, respectively. The effects of the PO43−/Fe3+ co-doping amount on the crystal structure, particle morphology and electrochemical performance of LiNi0.5Mn1.5O4 are intensively studied. The results show that the PO43−/Fe3+ co-doping amount exerts a significant influence on the crystal structure and particle morphology, including increased crystallinity, lowered Mn3+ content, smaller primary particle size with decreased agglomeration and the exposure of high-energy (110) and (311) crystal surfaces in primary particles. The synergy of the above factors contributes to the obviously ameliorated electrochemical performance of the co-doped samples. The LiNi0.5Mn1.45Fe0.03P0.02O4 sample exhibits the best cycling stability, and the LiNi0.5Mn1.4333Fe0.04P0.0267O4 sample displays the best rate performance. The electrochemical properties of LiNi0.5Mn1.5-5/3xFexP2/3xO4 can be regulated by adjusting the PO43−/Fe3+ co-doping amount.
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Research context
OpenAlex topics: Advancements in Battery Materials · Extraction and Separation Processes · Advanced Battery Technologies Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Shandong Goldencell Electronics Technology Co., Ltd., Zaozhuang 277100, China
School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300401, China
Funding
National Natural Science Foundation of China
References (31)
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