Barrel effect of high-rate capability determined by anode for LiNi0.5Co0.2Mn0.3O2/graphite lithium-ion battery

被引:0
作者
Liu, Mengyang [1 ,2 ]
Zhang, Songtong [2 ]
Zhu, Xiayu [2 ]
Kumar, Pushpendra [4 ]
Ming, Hai [2 ]
Meng, Wenjie [3 ]
Guan, Hongsheng [3 ]
Qiu, Jingyi [2 ]
Chen, Zhijun [1 ]
机构
[1] Zhengzhou Univ Light Ind, Sch Chem Engn & Mat Sci, Henan Prov Key Lab Surface & Interface Sci, Zhengzhou 450002, Peoples R China
[2] AMS, Chem Def Inst, Beijing 100191, Peoples R China
[3] Beihang Univ, Sch Reliabil & Syst Engn, Beijing 100191, Peoples R China
[4] Jawaharlal Nehru Univ, Sch Phys Sci, New Delhi 110067, India
基金
中国国家自然科学基金;
关键词
Lithium -ion battery; High -rate capability; Accelerates aging; Barrel effect; Failure mechanism;
D O I
10.1016/j.jpowsour.2024.235011
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
To date, charging time remains a critical issue that impedes the widespread application of lithium-ion batteries (LIBs). A comprehensive understanding of the attenuation mechanism of LIBs at high (dis)charging rates is essential for clarifying application strategies for extreme operating conditions and environments, thereby enhancing battery control, and guiding the design of advanced batteries with superior rate capability. In line with this focus, particular commercial NCM/graphite batteries were explored under various high-rate (dis) charging procedures, alongside the investigation of the impact of constant voltage steps on battery performance. This exploration revealed that capacity degradation occurs in three stages, and the rate of capacity decay is directly proportional to the (dis)charging rate. Furthermore, the in-situ temperature and stress of the battery during cycling, primarily caused by side reactions, were monitored to confirm the thermal effects and stress variations under high-rate conditions. By characterizing the morphology and composition of the electrode surface after post-mortem analysis, the "barrel effect" of high-rate capability determined by the anode electrode for LIBs is proposed. This research aims to establish optimal guidelines for designing batteries with excellent highrate properties and to provide solutions for improving the safety and reliability of batteries applied in high-rate conditions.
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页数:12
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