Ultra-homogeneous dense Ag nano layer enables long lifespan solid-state lithium metal batteries  

作　　者：Yaning Liu Tianqi Yang Ruyi Fang Chengwei Lu Ruojian Ma Ke Yue Zhen Xiao Xiaozheng Zhou Wenkui Zhang Xinping He Yongping Gan Jun Zhang Xinhui Xia Hui Huang Xinyong Tao Yang Xia 

机构地区：[1]College of Materials Science and Engineering,Zhejiang University of Technology,Hangzhou 310014,Zhejiang,China [2]Key Laboratory of Rare Earth Optoelectronic Materials and Devices of Zhejiang Province,Institute of Optoelectronic Materials and Devices,China Jiliang University,Hangzhou 310018,Zhejiang,China

出　　处：《Journal of Energy Chemistry》2024年第9期110-119,共10页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China(22279116 and U20A20253);the Natural Science Foundationof Zhejiang Province(LD22E020006 and LQ24E020012);the Science and Technology Development of Zhejiang Province(2023C01231 and 2024C01095);the Baima Lake Laboratory Joint Funds of the Zhejiang Provincial Natural Science Foundation(LBMHD24E020001);the China Postdoctoral Science Foundation(2020M671785 and 2020T130597);the Fundamental Research Funds for the Provincial Universities of Zhejiang(2022YW54).

摘　　要：The unstable electrolyte/lithium(Li)anode interface has been one of the key challenges in realizing high energy density solid-state lithium metal batteries(LMBs)applications.Herein,a dense and uniform silver(Ag)nano interlayer with a thickness of∼35 nm is designed accurately by magnetron sputtering technology to optimize the electrolyte/Li anode interface.This Ag nano layer reacts with Li metal anode to in-situ form Li-Ag alloy,thus enhancing the physical interfacial contact,and further improving the interfacial wettability and compatibility.In particular,the Li-Ag alloy is inclined to form AgLi phase proved by cryo-TEM and DFT,effectively preventing SN from continuously“attacking”the Li metal anode due to the lower adsorption of succinonitrile(SN)molecules on AgLi than that of pure Li metal,thereby significantly reinforcing the interfacial stability.Hence,the enhanced physical and chemical stability of electrolyte/Li anode interface promotes the homogeneous deposition of Li^(+)and inhibits the dendrite growth.The Li-symmetric cell maintains stable operation for up to 1700 h and the cycling stability of LiFePO_(4)|SPE|Li full cell is remarkably improved at room temperature(capacity retention rate of 91.9%for 200 cycles).This work opens an effective way for accurate and controllable interface design of long lifespan solid-state LMBs.

关 键 词：Silvernano layer Poly(ethylene oxide) Solid polymer electrolyte SUCCINONITRILE Lithium metal battery 

分 类 号：TM912[电气工程—电力电子与电力传动] TB383.1[一般工业技术—材料科学与工程]