阴极
微观结构
材料科学
纳米-
化学工程
聚乙烯吡咯烷酮
微尺度化学
锂(药物)
热液循环
纳米技术
复合材料
物理化学
化学
高分子化学
工程类
内分泌学
数学教育
医学
数学
作者
Yu Li,Ying Bai,Xuanxuan Bi,Ji Qian,Lu Ma,Jun Tian,Chuan Wu,Feng Wu,Jun Lü,Khalil Amine
出处
期刊:Chemsuschem
[Wiley]
日期:2016-03-04
卷期号:9 (7): 728-735
被引量:63
标识
DOI:10.1002/cssc.201501548
摘要
Rechargeable lithium-ion batteries with high energy and high power density are required in the application of electric vehicles and portable electronics. Herein, we introduce a type of spherical Li-rich cathode material, Li1.2Ni0.2Mn0.6O2, assembled from uniform nanocubes by a facile polyvinylpyrrolidone (PVP)-assisted hydrothermal method. The material with a hierarchical nano-/microstructure exhibits stable high-rate performance. Furthermore, the precipitant (i.e., urea) and the structure-directing agent (i.e., PVP) effectively activated the Li2 MnO3 components in the microscale material to achieve a high specific capacity of 298.5 mAh g(-1) in the first cycle. This Li-rich cathode material still delivered 243 mAh g(-1) at 0.1 C after 200 cycles and the capacity retentions at 0.5, 1, 2, and 5 C were 94.4, 78.7, 76.3, and 67.8% after 150 cycles, respectively. The results make this Li-rich nano-/microstructure a promising cathode material for long-life and high-performance lithium-ion batteries.
科研通智能强力驱动
Strongly Powered by AbleSci AI