Ma Ting, Ren Xiuyun, Hu Liang, Teng Wanming, Wang Xiaohu, Wu Guanglei, Liu Jun, Nan Ding, Li Baohua, Yu Xiaoliang
College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China.
Inner Mongolia Key Laboratory of Graphite and Graphene for Energy Storage and Coating, School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot 010051, China.
Polymers (Basel). 2022 Aug 15;14(16):3312. doi: 10.3390/polym14163312.
Lithium-metal batteries have attracted extensive research attention because of their high energy densities. Developing appropriate electrolytes compatible with lithium-metal anodes is of great significance to facilitate their practical application. Currently used electrolytes still face challenges of high production costs and unsatisfactory Coulombic efficiencies of lithium plating/stripping. In this research, we have developed a diluted electrolyte which is compatible with both lithium-metal anode and sulfurized polyacrylonitrile cathode. It presents a very high Li plating/stripping Coulombic efficiency of 99.3% over prolonged cycling, and the as-assembled anode-free Li-S battery maintains 71.5% of the initial specific capacity after 200 cycles at 0.1 A g. This work could shed light on designing a low-cost and high-performance liquid electrolyte for next-generation high-energy batteries.
锂金属电池因其高能量密度而吸引了广泛的研究关注。开发与锂金属阳极兼容的合适电解质对于促进其实际应用具有重要意义。目前使用的电解质仍面临高生产成本以及锂电镀/剥离库仑效率不理想的挑战。在本研究中，我们开发了一种稀释电解质，它与锂金属阳极和硫化聚丙烯腈阴极都兼容。在长时间循环过程中，它呈现出高达99.3%的锂电镀/剥离库仑效率，并且组装好的无阳极锂硫电池在0.1 A g下循环200次后仍保持初始比容量的71.5%。这项工作可为下一代高能电池设计低成本、高性能的液体电解质提供思路。
