A 3D conducting scaffold with in-situ grown lithiophilic Ni2P nanoarrays for high stability lithium metal anodes

• 作者: Huai Jiang Hailin Fan Zexun Han Bo Hong Feixiang Wu Kai Zhang Zhian Zhang Jing Fang Yanqing Lai
• 来源期刊: 能源化学
• 年，卷（期）: 2021,（3）
• 页码范围: 301-309
• 页数: 9页
• 语种: 英文

摘要

Lithium(Li)metal is the most potential anode material for the next-generation high-energy rechargeable batteries.However,intrinsic surface unevenness and'hostless'nature of Li metal induces infinite volume effect and uncontrollable dendrite growth.Herein,we design the in-situ grown lithiophilic Ni2P nanoar-rays inside nickel foam(PNF).Uniform Ni2P nanoarrays coating presents a very low nucleation overpo-tential,which induces the homogeneous Li deposition in the entire spaces of three-dimensional(3D)metal framework.Specifically,the lithiophilic Ni2P nanoarrays possess characteristics of electrical con-ductivity and structural stability,which have almost no expansion and damage during repeating Li plat-ing/stripping.Therefore,they chronically inhibit the growth of Li dendrites.This results in an outstanding Coulombic efficiency(CE)of 98％at 3 mA cm-2 and an ultralong cycling life over 2000 cycles with a low overpotential.Consequently,the PNF-Li||LiFePO4 battery maintains a capacity retention of 95.3％with a stable CE of 99.9％over 500 cycles at 2C.