Flexible rechargeable Ni//Zn battery based on self-supported NiCo2O4 nanosheets with high power density and good cycling stability

• 作者: Haodong Li Haozhe Zhang Peng Zhang Xihong Lu Xinyue Zhang Yexiang Tong Yifeng Zhang Yinxiang Zeng
• 来源期刊: 绿色能源与环境：英文版
• 学科: 工学
• 年，卷（期）: 2018,（1）
• 页码范围: 56-62
• 页数: 7页
• 分类号: TM912

摘要

The overall electrochemical performances of Ni-Zn batteries are still far from satisfactory, specifically for rate performance and cycling stability Herein, we demonstrated a high-performance flexible Ni//Zn battery with outstanding durability and high power density based on selfsupported NiCo2 O4 nanosheets as cathode and Zn nanosheets as anode. This Ni//Zn battery is able to deliver a remarkable capacity of183.1 mAh g-1 and a good cycling performance（82.7% capacity retention after 3500 cycles）. More importantly, this battery achieves an admirable power density of 49.0 kW kg-1 and energy density of 303.8 Wh kg-1, substantially higher than most recently reported batteries. With such excellent electrochemical performance, this battery will have great potential as an ultrafast power source in practical application.