An air-stable and waterproof lithium metal anode enabled by wax composite packaging

论文摘要

The reviving use of lithium metal anode（LMA）is one of the most promising ways to upgrade the energy density of lithium ion batteries.In the roadmap towards the real use,besides the formation of the dendrite,various adverse reactions due to the high activity of LMA when exposed to air or the electrolyte limit its practical applications.Learning from the packaging technology in electronic industry,we propose a wax-based coating compositing with the ion conducting poly（ethylene oxide）by a simple dip-coating technology and the prepared LMA is featured with an air-stable and waterproof surface.The LMA thus remains stable for 24 h in ambient air even with the relative humidity of 70% while retaining about85% its electrochemical capacity.More importantly,the LMA is accessible to water and when dipping in water,no obvious adverse reactions or capacity decay is observed.With the composite coating,a steady cycling performance for 500 h in symmetrical cells and a low capacity decay rate of 0.075% per cycle after 300 cycles in lithium-sulfur batteries assembled with the packaged anode have been achieved.This work demonstrates a very simple and effective LMA package technology which is easily scalable and is very promising for speeding up the industrialization of lithium-sulfur batteries and shows potentials for the large-scale production of air-sensitive electrode materials not limited to LMAs.

论文目录

• 1. Introduction
• 2. Materials and methods
•   2.1. Chemicals and materials
•   2.2. Preparation of the Li-wax-PEO
•   2.3. Preparation of Li-PEO and Li-wax
•   2.4. Stability tests in air and water
•   2.5. Electrochemical performance assessment
•   2.6. Li-S cell assembly
• 3. Results and discussion
• 4. Conclusion
• Conflict of interest
• Author contributions
• Appendix A.Supplementary data

文章来源

类型: 期刊论文

作者: Yunbo Zhang,Wei Lv,Zhijia Huang,Guangmin Zhou,Yaqian Deng,Jun Zhang,Chen Zhang,Boyu Hao,Qi Qi,Yan-Bing He,Feiyu Kang,Quan-Hong Yang

来源: Science Bulletin 2019年13期

年度: 2019

分类: 基础科学,工程科技Ⅱ辑

专业: 电力工业

单位: Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University,Shenzhen Geim Graphene Center, Graduate School at Shenzhen, Tsinghua University,Department of Materials Science and Engineering, Stanford University,Nanoyang Group, State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University

基金: supported by the National Science Fund for Distinguished Young Scholars,China (51525204),National Natural Science Foundation of China (51772164 and U1601206),Guangdong Natural Science Funds for Distinguished Young Scholar (2017B030306006),Guangdong Special Support Program (2017TQ04C664),the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01N111),the Shenzhen Basic Research Project (JCYJ20170412171630020 and JCYJ20170412171359175)

分类号: TM912

页码: 910-917

总页数: 8

文件大小: 5845K

下载量: 13