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

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外文摘要：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 technol-ogy 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 signif-icantly reinforcing the interfacial stability.Hence,the enhanced physical and chemical stability of elec-trolyte/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 LiFePO4|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.

外文关键词：

Silver nano layerPoly(ethylene oxide)Solid polymer electrolyteSuccinonitrileLithium metal battery

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

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作者单位：

College of Materials Science and Engineering,Zhejiang University of Technology,Hangzhou 310014,Zhejiang,China

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

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Zhejiang ProvinceNatural Science Foundation of Zhejiang ProvinceScience and Technology Development of Zhejiang ProvinceScience and Technology Development of Zhejiang ProvinceBaima Lake Laboratory Joint Funds of the Zhejiang Provincial Natural Science FoundationChina Postdoctoral Science FoundationChina Postdoctoral Science FoundationFundamental Research Funds for the Provincial Universities of Zhejiang

项目编号：

22279116U20A20253LD22E020006LQ24E0200122023C012312024C01095LBMHD24E0200012020M6717852020T1305972022YW54

出版年：

2024

DOI：

10.1016/j.jechem.2024.04.017

能源化学

中国科学院大连化学物理研究所中国科学院成都有机化学研究所

能源化学

CSTPCDEI

影响因子：0.654

ISSN：2095-4956

年,卷(期)：2024.96(9)