阳极
材料科学
电化学
锂(药物)
离子
无定形固体
复合数
化学工程
碳纤维
晶界
扩散
纳米技术
复合材料
电极
结晶学
化学
微观结构
物理化学
有机化学
热力学
内分泌学
工程类
物理
医学
作者
Zhenbang Li,Fei Tian,Yan Li,Danni Lei,Chengxin Wang
出处
期刊:Small
[Wiley]
日期:2022-10-31
卷期号:18 (50)
被引量:6
标识
DOI:10.1002/smll.202204875
摘要
The insertion type materials are the most important anode materials for lithium-ion batteries, but their insufficient capacity is the bottleneck of practical application. Here, LiAl5 O8 nanowires with high theoretical capacity and Li-ions diffusion coefficient are prepared and studied as an insertion anode material, which exhibits zero-strain properties upon electrochemical cycling. However, the poor electronic conductivity of LiAl5 O8 definitely sacrifices the capacity and limits the rate performance. Therefore, compact LiAl5 O8 and carbon composite are further synthesized, in which nanosized LiAl5 O8 particles are uniformly embedded in an amorphous carbon matrix. It displays a reversible capacity of 490.9 mAh g-1 at 1 A g-1 , and the capacity rises continuously to 996.8 mAh g-1 after 1000 cycles due to the interfacial storage mechanism, that the excess Li+ ions can be accommodated in the grain boundaries and C/LiAl5 O8 interfaces.
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