共沉淀
法拉第效率
电化学
容量损失
电解质
涂层
电极
锂(药物)
表面改性
材料科学
化学工程
图层(电子)
化学
无机化学
纳米技术
工程类
医学
内分泌学
物理化学
作者
Lina Cong,Xu-Guang Gao,Shunchao Ma,Xin Guo,Yanping Zeng,Ling-Hua Tai,Rongshun Wang,Haiming Xie,Liqun Sun
标识
DOI:10.1016/j.electacta.2013.10.117
摘要
Li[Li0.2Mn0.54Ni0.13Co0.13]O2 was prepared using a coprecipitation method and modified with Li4Ti5O12. The sample coated with 3 wt% Li4Ti5O12 exhibited the best cyclability and mean coulombic efficiency in the voltage range of 2.0–4.75 V. These improvements are attributed to the effective Li4Ti5O12 coating layer, which stabilizes the host structure, protects the electrode surface from electrolyte attack, and prevents the formation of a thick passive film on the electrode surface. The initial irreversible capacity loss was eliminated by blending with 10 wt% Li4Ti5O12, in the larger potential window of 1.5–4.75 V. It was confirmed that the irreversible capacity loss decreased with increasing Li4Ti5O12 content; this is because Li4Ti5O12 offers a larger number of available sites for insertion of extracted lithium.
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