In situ formed synaptic Zn@LiZn host derived from ZnO nanofiber decorated Zn foam for dendrite-free lithium metal anode  

作　　者：Jian Bao Hai-Juan Pei Xin-Yang Yue Xun-Lu Li Cui Ma Rui-Jie Luo Chong-Yu Du Yong-Ning Zhou 

机构地区：[1]Department of Materials Science,Fudan University,Shanghai 200433,China [2]State Key Laboratory of Space Power-Sources Technology,Shanghai Institute of Space Power-Sources,Shanghai 200245,China [3]Department of Chemical Engineering,Tsinghua University,Beijing 100084,China

出　　处：《Nano Research》2023年第6期8345-8353,共9页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.52071085);Shanghai Aerospace Science and Technology Innovation Fund(No.SAST2020-102).

摘　　要：Lithium metal is regarded as the most promising anode material for next generation high energy density lithium batteries due to its high theoretical capacity and lowest potential versus standard hydrogen electrode.However,lithium dendrite growth and huge volume change during cycling hinder its practical application.It is of great importance to design advanced Li metal anodes to solve these problems.Herein,we report a ZnO-coated Zn foam as the host matrix to pre-store lithium through thermal infusing,achieving a Zn@ZnO foam supported Li composite electrode(LZO).Needlelike ZnO nanofibers grown on the Zn foam greatly increase the surface area and enhance the lithiophilicity of the Zn foam.In situ formed synaptic LiZn layer after lithium infusion can disperse local current density and lower Li diffusion barrier effectively,leading to homogeneous Li deposition behavior,thus suppressing dendrite formation.The porous Zn foam skeleton can accommodate volume variation of the electrode during longterm cycling.Benefiting from these merits,the LZO anode exhibits much better cycle stability and rate capability in both symmetrical and full cells with low voltage hysteresis than the bare Li anode.This work opens a new opportunity in designing high performance composite Li anode for lithium-metal batteries.

关 键 词：lithium batteries anode LiZn alloy thermal infusion Li metal 

分 类 号：TM912[电气工程—电力电子与电力传动]