材料科学
阳极
石墨烯
锂(药物)
涂层
聚合
阴极
化学工程
纳米技术
复合材料
电极
聚合物
物理化学
电气工程
医学
化学
内分泌学
工程类
作者
Hal-Bon Gu,Yong Wang,Yun Zeng,Meng Yu,Tong Liu,Jian Chen,Ke Wang,Jun Xie,Linsen Li
标识
DOI:10.1021/acsami.2c01587
摘要
SiOx suffers from the 200% volume change during cycling and low electronic conductivity, resulting in poor cyclability and rate capability as a lithium-ion battery anode. Herein, we demonstrate a dopamine polymerization-guided carbon coating for SiOx anodes (SiOx@PDA@GNH). SiOx@PDA@GNH delivers charge capacities of 1269 and 1140 mA h·g-1 at charge rates of 0.05 and 3 C, respectively, and a capacity retention of 79.60% after 150 cycles at 1 C. A full cell with LiNi0.8Co0.1Mn0.1O2 or cathode demonstrates a capacity retention of >80% after 100 cycles at the rate of 0.33 C with an area capacity over 3.2 mA h·cm-2. Suppressed crack and overgrowth of the SEI layer are the key contributions for the improved performance. These results enlighten a practical pathway for the designing and modifications of SiOx anodes for high energy density lithium-ion batteries.
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