阴极
材料科学
电池(电)
离子
涂层
氧化物
辐照
电流密度
化学工程
复合材料
纳米技术
法律工程学
冶金
电气工程
化学
功率(物理)
物理
有机化学
量子力学
核物理学
工程类
作者
Zeyang Li,Long Deng,Tongye Wei,Hongbin Zhao,Chengxin Wang,Xiaolin Wei
标识
DOI:10.1016/j.apsusc.2023.158219
摘要
Reachable Zinc ion batteries (ZIBs) are regarded as promising large scale energy storge systems because of their advantages of high safety, high energy density (high volumetric capacity), and economic benefits. However, ZIBs suffer from of lack of suitable cathode materials with high capacity and long stability of circulation. In addition, conventional coating process to prepare cathode with binder (PVDF/PTFE et al.) will not only reduce active material loading but also hinder ion transmission. Hence, a simple binder-free cathode prepare process was proposed. We use laser irradiation the Mn7O13·5H2O/graphene oxide cathode. The laser irradiation will induce vacancy defect in the Mn7O13·5H2O, leading to more active contact sites. Finally, the prepared materials achieve an ultra-high specific capacity of 411.6 mAh g–1 (0.2 A g–1), an excellent rate performance (176.3 mAh g–1 at a current density of 5 A g–1), and a satisfactory capacity retention rate of 90.1% after long 3500 cycles at 2 A g–1. The assembled all-in-one architecture battery has a fair specific capacity of 177.3 mAh g–1 at the current density of 2 A g–1. This work opens up a new horizon for conveniently preparing binder-free cathode materials with defects for high energy density and long cycle life.
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