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DOI	10.1039/d1ee00068c
	A low-charge-overpotential lithium-CO2cell based on a binary molten salt electrolyte
	Wang D.; Yang J.; He P.; Zhou H.
发表日期	2021
ISSN	17545692
起始页码	4107
结束页码	4114
卷号	14 期号:7
英文摘要	The high charge overpotential of Li-CO2 batteries leads to short calendar life and low energy efficiency. Solid catalysts such as functional carbon materials and noble metals have been studied extensively to facilitate the decomposition of Li2CO3. However, the charge potential is still over 4 V and side reactions of electrolytes are still unavoidable. Unlike progressively developed catalysts, few efforts have been made for the optimization of electrolytes, which is the bottleneck to develop practical Li-CO2 batteries. Here, we demonstrate a binary molten salt Li-CO2 battery operating at elevated temperature. In the presence of an involatile molten salt electrolyte, CO2 evolution during the charging process can be controlled below 3.6 V with a carbon cathode, which is even lower than previously reported values with noble metal catalysts. In addition to this optimized electrolyte solution, Ru nanoparticles with high catalytic activities are also prepared for the solid cathode. Based on this heterogeneous electrocatalysis, the charge potential of this Li-CO2 battery is further reduced to 3.2 V, and the cycling life is extended to 70 cycles. This work provides a promising strategy to extend the working conditions of Li-CO2 batteries to higher temperatures. It also provides a direct insight into the reduction of the high charge overpotential of Li-CO2 batteries, and mitigation of electrolyte decomposition. © The Royal Society of Chemistry.
英文关键词	Carbon; Carbon dioxide; Catalyst activity; Cathodes; Electrocatalysis; Electrolytes; Energy efficiency; Fused salts; Lithium; Precious metals; Secondary batteries; Charge potentials; Charging process; Electrolyte decomposition; Electrolyte solutions; Elevated temperature; Molten salt electrolytes; Noble metal catalysts; Ru nanoparticles; Lithium compounds; carbon dioxide; electrolyte; fuel cell; lithium; nanoparticle; optimization; salt
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190623
作者单位	Center of Energy Storage Materials and Technology, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China; School of Energy Science and Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, China; National Institute of Advanced Industrial Science and Technology (AIST), Umezono 1-1-1, Tsukuba, 305-8568, Japan
推荐引用方式 GB/T 7714	Wang D.,Yang J.,He P.,et al. A low-charge-overpotential lithium-CO2cell based on a binary molten salt electrolyte[J],2021,14(7).
APA	Wang D.,Yang J.,He P.,&Zhou H..(2021).A low-charge-overpotential lithium-CO2cell based on a binary molten salt electrolyte.Energy & Environmental Science,14(7).
MLA	Wang D.,et al."A low-charge-overpotential lithium-CO2cell based on a binary molten salt electrolyte".Energy & Environmental Science 14.7(2021).