过电位
材料科学
催化作用
电池(电)
电化学
化学工程
碳纤维
二氧化碳
化石燃料
碳纳米管
温室气体
钴
分解
阴极
纳米技术
复合数
电极
化学
复合材料
有机化学
冶金
物理化学
功率(物理)
工程类
物理
生物
量子力学
生态学
作者
Xu Ji,Yang Liu,Z.Y. Zhang,Junyan Cui,Yangyang Fan,Yun Qiao
标识
DOI:10.1002/chem.202303319
摘要
With the extensive use of fossil fuels, the ever-increasing greenhouse gas of mainly carbon dioxide emissions will result in global climate change. It is of utmost importance to reduce carbon dioxide emissions and its utilization. Li-CO2 batteries can convert carbon dioxide into electrochemical energy. However, developing efficient catalysts for the decomposition of Li2 CO3 as the discharge product represents a challenge in Li-CO2 batteries. Herein, we demonstrate a carbon foam composite with growing carbon nanotube by using cobalt as the catalyst, showing the ability to enhance the decomposition rate of Li2 CO3 , and thus improve the electrochemical performance of Li-CO2 batteries. Benefiting from its abundant pore structure and catalytic sites, the as-assembled Li-CO2 battery exhibits a desirable overpotential of 1.67 V after 50 cycles. Moreover, the overpotentials are 1.05 and 2.38 V at current densities of 0.02 and 0.20 mA cm-2 , respectively. These results provide a new avenue for the development of efficient catalysts for Li-CO2 batteries.
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