,Flexible rechargeable Ni//Zn battery based on self-supported NiCo2O4 nanosheets with high power den

• 作 者: Haozhe Zhang Xinyue Zhang Haodong Li Yifeng Zhang Yinxiang Zeng Yexiang Tong Peng Zhang Xihong Lu
• 机 构: MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-carbon Chem&En
• 出 处: 绿色能源与环境（英文）
• 发表日期: 2018年1期
• 关键词: Ni//Zn battery Flexible NiCo2O4 Rechargeable Long cycling life

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 self-supported NiCo2O4 nanosheets as cathode and Zn nanosheets as anode. This Ni//Zn battery is able to deliver a remarkable capacity of 183.1 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.