材料科学
电池(电)
阴极
化学工程
多孔性
碳纤维
纳米技术
化学
复合材料
复合数
热力学
物理
工程类
物理化学
功率(物理)
作者
Zhu Tao,Sheng Wang,Zhiqian Yu,Hucheng Song,Jun Xu,Kunji Chen
出处
期刊:Small
[Wiley]
日期:2023-04-24
卷期号:19 (33)
被引量:3
标识
DOI:10.1002/smll.202301498
摘要
Abstract Lithium‐carbon dioxide (Li‐CO 2 ) batteries have attracted much attention due to their high theoretical energy density. However, due to the existance of lithium carbonate and amorphous carbon in the discharge products that are difficult to decompose, the battery shows low coulombic efficiency and poor cycle performance. Here, by adjusting the adsorption of carbon dioxide (CO 2 ) on ruthenium (Ru) catalysts surface, this work reports an ultralow charge overpotential and long cycle life Li‐CO 2 battery that consists of typical lithium metal, ternary molten salt electrolyte (TMSE), and Ru‐based cathode. Experimental results show that the Ru catalysts deposited on quartz nanofiber (QF) can suppress the four‐electron conversion of CO 2 to lithium carbonate (Li 2 CO 3 ). As a result, the battery shows a long‐cycle‐life of over 457 cycles at 1.0 A g −1 with a limited capacity of 500 mAh g −1 Ru . Remarkably, a recorded low discharge potential of ≈3.0 V has been achieved after 35 cycles at 0.5 A g −1 , with a charge potential retention of over 99%. Moreover, the battery can operate over 25 A g −1 and recover 96% potential. This battery technology paves the way for designing high‐performance rechargeable Li‐CO 2 batteries with carbon neutrality.
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