Flower-shaped lithium nitride as a protective layer via facile plasma activation for stable lithium metal anodes

被引：188

作者：

Chen, Ke ^{[1
]}

Pathak, Rajesh ^{[1
]}

Gurung, Ashim ^{[1
]}

Adhamash, Ezaldeen A. ^{[1
]}

Bahrami, Behzad ^{[1
]}

He, Qingquan ^{[1
]}

Qiao, Hui ^{[1
,2
]}

Smirnova, Alevtina L. ^{[3
]}

Wu, James J. ^{[4
]}

Qiao, Qiquan ^{[1
]}

Zhou, Yue ^{[1
]}

机构：

[1] South Dakota State Univ, Ctr Adv Photovolta & Sustainable Energy, Dept Elect Engn & Comp Sci, Brookings, SD 57007 USA

[2] Jiangnan Univ, Key Lab Ecotext, Minist Educ, Wuxi 214122, Peoples R China

[3] South Dakota Sch Mines & Technol, Dept Chem & Appl Biol Sci, Rapid City, SD 57701 USA

[4] NASA, Glenn Res Ctr, Cleveland, OH 44135 USA

来源：

ENERGY STORAGE MATERIALS | 2019年 / 18卷

基金：

中国博士后科学基金;

关键词：

Li3N; Lithium metal anode; Artificial SEI layer; N-2; plasma; ELECTROLYTE INTERPHASE LAYER; CYCLING STABILITY; HIGH-ENERGY; LI3N; ION; CHALLENGES; BATTERIES; COST; SEI;

D O I：

10.1016/j.ensm.2019.02.006

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：

Unstable solid electrolyte interphase (SEI) layer formation and uncontrolled lithium (Li) dendrites growth are two major obstacles that hinder the application of Li metal as the anode in Li batteries. To solve these problems, a multifunctional protective layer was designed for the first time using N-2 plasma activation of the Li metal. A highly [001] oriented and flower shaped Li3N layer was obtained on the surface of Li metal with a plasma activation time less than 5 min. Due to high Young's modulus (48 GPa) and high ionic conductivity (5.02 x 10(-1) mS cm(-1)), this unique protective layer can physically block the direct contact between reactive Li metal and the liquid organic electrolyte, and suppress the Li dendrites formation. It gives rise to a stable voltage profile with plating/stripping for 30,000 min in a symmetric cell. For Li/LCO full cell, the plasma activated Li3N electrode shows better capacity retention of more than 96% and higher capacity at a 5 C rate compared to bare Li anode. This plasma activation strategy provides a facile, scalable and efficient approach to realize a safe Li metal battery with superior electrochemical performance.

引用

页码：389 / 396

页数：8

共 46 条

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