摘要
Lithium-carbon dioxide(Li-CO_(2))batteries using high ion-conductive inorganic molten salt electrolytes have recently attracted much attention due to the high energy density and potential application of carbon neutrality.However,the poor Li-ion conductivity of the molten-salt electrolytes at room temperature(RT)makes these batteries lose most of their capacity and power as the temperature falls below 80℃.Here,inspired by the greenhouse effect,we report an RT molten salt Li-CO_(2)battery where solar energy can be efficiently harvested and converted into heat that is further localized on the cathode consisting of plasmonic ruthenium(Ru)catalysts and Li_(2)CO_(3)-based products via a greenhouse-like phenomenon.As a result,the solar-driven molten salt Li-CO_(2)battery demonstrates a larger full discharge/charge capacity of 9.5 mA h/8.1 mA h,and a longer cycle lifespan of 250 cycles at 500 mA/g with a limited capacity of 500 mA h/g at RT than the molten salt Li-CO_(2)battery at 130℃.Notably,the average temperature of the cathode increases by 8℃ after discharge to 0.75 mA h,which indicates the infrared radiation from Ru catalysts can be effectively suppressed by discharged Li_(2)CO_(3)-based products.This battery technology paves the way for developing low-temperature molten salt energy storage devices.
基金
supported by the National Natural Science Foundation of China(NSFC,62104099,61921005,62105048,62204117 and 62073299)
the Science and Technology Research Program of Chongqing Education Commission(KJQN202100633)
the Postdoctoral Science Foundation of China(2021M693768 and 2021M701057)
the Key Scientific Research Project in Colleges and Universities of Henan Province,China(21A416001)
the Key Laboratory for Special Functional Materials(KEKT2022-06)
the Natural Science Foundation of Jiangsu Province(BK20210275 and BK20230498)
the support from Jiangsu Province Science Foundation for Youths(BK20210275)
National Natural Science Foundation of China(NSFC,62204117)。
