High-Performance Lithium Metal Negative Electrode with a Soft and Flowable Polymer Coating

被引：250

作者：

Zheng, Guangyuan ^{[1
,8
]}

Wang, Chao ^{[2
]}

Pei, Allen ^{[1
]}

Lopez, Jeffrey ^{[2
]}

Shi, Feifei ^{[1
]}

Chen, Zheng ^{[2
,9
]}

Sendek, Austin D. ^{[3
]}

Lee, Hyun-Wook ^{[1
,10
]}

Lu, Zhenda ^{[1
,11
]}

Schneider, Holger ^{[6
]}

Safont-Sempere, Marina M. ^{[6
]}

Chu, Steven ^{[4
,5
]}

Bao, Zhenan ^{[2
]}

Cui, Yi ^{[1
,7
]}

机构：

[1] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA

[2] Stanford Univ, Dept Chem Engn, Stanford, CA 94305 USA

[3] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

[4] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

[5] Stanford Univ, Dept Mol & Cellular Physiol, Stanford, CA 94305 USA

[6] BASF SE, D-67056 Ludwigshafen, Germany

[7] SLAC Natl Accelerator Lab, Stanford Inst Mat & Energy Sci, Menlo Pk, CA 94025 USA

[8] Inst Mat Res & Engn, 2 Fusionopolis Way,Innovis 08-03, Singapore 138634, Singapore

[9] Univ Calif San Diego, Dept NanoEngn, La Jolla, CA 92093 USA

[10] UNIST, Sch Energy & Chem Engn, Ulsan 44919, South Korea

[11] Nanjing Univ, Coll Engn & Appl Sci, Nanjing 210093, Jiangsu, Peoples R China

来源：

ACS ENERGY LETTERS | 2016年 / 1卷 / 06期

基金：

美国国家科学基金会;

关键词：

SILICON MICROPARTICLE ANODES; DENDRITE GROWTH; ION BATTERIES; DEPOSITION; LIQUID; MORPHOLOGY; DENSITY;

D O I：

10.1021/acsenergylett.6b00456

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The future development of low-cost, high-performance electric vehicles depends on the success of next-generation lithium-ion batteries with higher energy density. The lithium metal negative electrode is key to applying these new battery technologies. However, the problems of lithium dendrite growth and low Coulombic efficiency have proven to be difficult challenges to overcome. Fundamentally, these two issues stem from the instability of the solid electrolyte interphase (SEI) layer, which is easily damaged by the large volumetric changes during battery cycling. In this work, we show that when a highly viscoelastic polymer was applied to the lithium metal electrode, the morphology of the lithium deposition became significantly more uniform. At a high current density of 5 mA/cm(2) we obtained a flat and dense lithium metal layer, and we observed stable cycling Coulombic efficiency of similar to 97% maintained for more than 180 cycles at a current density of 1 mA/cm(2).

引用

页码：1247 / 1255

页数：9

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