Teng Wanming, Li Yanyan, Ma Ting, Ren Xiuyun, Nan Ding, Liu Jun, Wang Xiaohu, Yang Qin, Deng Jiaojiao
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 Oct 24;14(21):4494. doi: 10.3390/polym14214494.
Lithium metal batteries are emerging as the next generation of high-density electrochemical energy storage systems because of the ultra-high specific capacity and ultra-low electrochemical potential of the Li metal anode. However, the uneven Li deposition on commercial Cu current collectors result in low Coulombic efficiencies (CEs) and poor cycle life. In this research, we proposed the modification of ZnF(OH) on Cu foils to expand the lifespan. As-generated ZnLi alloy and LiF could promote uniform Li nucleation and deposition, thus resulting in an improved Li plating/stripping CE and extended cycle life. The Li-S battery with sulfurized polyacrylonitrile cathode and Li-ZnF(OH)@Cu anode (N/P ratio of 1.5:1) maintains 95% capacity after 60 cycles, proving the feasibility of ZnF(OH)@Cu for practical applications.
锂金属电池因其锂金属负极的超高比容量和超低电化学电位，正成为下一代高密度电化学储能系统。然而，商业铜集流体上锂沉积不均匀导致库仑效率（CEs）较低且循环寿命较差。在本研究中，我们提出在铜箔上修饰ZnF(OH)以延长使用寿命。生成的ZnLi合金和LiF可促进锂的均匀成核和沉积，从而提高锂电镀/剥离的CE并延长循环寿命。具有硫化聚丙烯腈阴极和Li-ZnF(OH)@Cu阳极（N/P比为1.5:1）的锂硫电池在60次循环后保持95%的容量，证明了ZnF(OH)@Cu在实际应用中的可行性。
