Boosting rate performance of LiNi0.8Co0.15Al0.05O2 cathode by simply mixing lithium iron phosphate
Boosting rate performance of LiNi0.8Co0.15Al0.05O2 cathode by simply mixing lithium iron phosphate
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通过简单混合磷酸铁锂提高LiNi0.8Co0.15Al0.05O2正极的倍率性能
DOI:
10.1016/j.jallcom.2020.154296
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发表时间:
2020-06
影响因子:
6.2
通讯作者:
Xia Shu-Biao
中科院分区:
文献类型:
--
作者:
Huang Wen-Jin;Zheng Jia-Yu;Liu Jian-Jun;Yang Rui-Ming;Cheng Fei-Xiang;Suo Hong-Bo;Guo Hong;Xia Shu-Biao
LiNi0.8Co0.15Al0.05O2(NCA), a cathode material for lithium-ion batteries (LIBs), is a promising material due to its high specific capacity. However, there are drawbacks like high cost, safety issues, and limited cycle-performance that represent obstacles for commercial applications. This study describes a simple ballmilling method to modify the surface of NCA materials and fill the gaps between particles by LiFePO4(LFP) cathode to improve its charge/discharge rate. The results show that NCA@5LFP, mixed with 5wt% LFP, has the best cycling and rate performance, with a higher capacity-retention (89.4% after 200 cycles, at 2C). Post-electrochemical andin-situanalysis reveal more detailed reasons of the observed improvements. The formation of a more stable solid electrolyte interface film in the NCA@5LFP hybrid electrode helps ensure the orderliness of the NCA structure, by reducing the charge-transfer resistance, and increasing the channel for lithium ion de-intercalation. All these factors help improve the battery performance.
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影响因子:
17.6
作者:
Liu, Yang;Tang, Lin-bo;Zheng, Jun-chao
通讯作者:
Zheng, Jun-chao
影响因子:
9.2
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Y. Lai;Ming Xu;Zhian Zhang;Chunhui Gao;Peng Wang;Ziyang Yu
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通讯作者:
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影响因子:
32.5
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通讯作者:
Sun, Yang-Kook
影响因子:
9.2
作者:
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通讯作者:
Ehrenberg, Helmut