阴极
碳纳米管
材料科学
电池(电)
催化作用
酞菁
镍
纳米技术
化学工程
分子
电极
碳纤维
化学
有机化学
复合材料
物理化学
冶金
功率(物理)
物理
量子力学
工程类
复合数
作者
Hongzhi Zheng,Huan Li,Zisheng Zhang,Xiaojun Wang,Zhan Jiang,Yirong Tang,Jibo Zhang,Benjamin Emley,Ye Zhang,Hua Zhou,Yan Yao,Yongye Liang
出处
期刊:Small
[Wiley]
日期:2023-06-28
卷期号:19 (43)
被引量:16
标识
DOI:10.1002/smll.202302768
摘要
The Li-CO2 battery has great potential for both CO2 utilization and energy storage, but its practical application is limited by low energy efficiency and short cycle life. Efficient cathode catalysts are needed to address this issue. Herein, this work reports on molecularly dispersed electrocatalysts (MDEs) of nickel phthalocyanine (NiPc) anchored on carbon nanotubes (CNTs) as the cathode catalyst for Li-CO2 batteries. The dispersed NiPc molecules efficiently catalyze CO2 reduction, while the conductive and porous CNTs networks facilitate CO2 evolution reaction, leading to enhanced discharging and charging performance compared to the NiPc and CNTs mixture. Octa-cyano substitution on NiPc (NiPc-CN) further enhances the interaction between the molecule and CNTs, resulting in better cycling stability. The Li-CO2 battery with the NiPc-CN MDE cathode shows a high discharge voltage of 2.72 V and a small discharging-charging potential gap of 1.4 V, and can work stably for over 120 cycles. The reversibility of the cathode is confirmed by experimental characterizations. This work lays a foundation for the development of molecular catalysts for Li-CO2 battery cathodes.
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