阴极
材料科学
上部结构
锂(药物)
氧化还原
化学工程
电极
氧气
图层(电子)
离子
纳米技术
物理化学
化学
热力学
冶金
有机化学
内分泌学
工程类
物理
医学
作者
Yuxuan Zuo,Biao Li,Ning Jiang,Wangsheng Chu,Hao Zhang,Ruqiang Zou,Dingguo Xia
标识
DOI:10.1002/adma.201707255
摘要
A high capacity cathode is the key to the realization of high-energy-density lithium-ion batteries. The anionic oxygen redox induced by activation of the Li2 MnO3 domain has previously afforded an O3-type layered Li-rich material used as the cathode for lithium-ion batteries with a notably high capacity of 250-300 mAh g-1 . However, its practical application in lithium-ion batteries has been limited due to electrodes made from this material suffering severe voltage fading and capacity decay during cycling. Here, it is shown that an O2-type Li-rich material with a single-layer Li2 MnO3 superstructure can deliver an extraordinary reversible capacity of 400 mAh g-1 (energy density: ≈1360 Wh kg-1 ). The activation of a single-layer Li2 MnO3 enables stable anionic oxygen redox reactions and leads to a highly reversible charge-discharge cycle. Understanding the high performance will further the development of high-capacity cathode materials that utilize anionic oxygen redox processes.
科研通智能强力驱动
Strongly Powered by AbleSci AI