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Title: Dendrite-Free and Performance-Enhanced Lithium Metal Batteries through Optimizing Solvent Compositions and Adding Combinational Additives

Abstract

The instability of lithium (Li) metal anode due to the dendritic growth and low Coulombic efficiency hinders the practical application of the well-regarded high-energy-density Li metal batteries. Here we report the systematic studies of improving the stability of Li metal anode and the electrochemical performances of the related Li metal batteries through the addition of combinational additives and the optimization of solvent compositions in dual-salt/carbonate electrolytes. A dendrite-free and high Coulombic efficiency of 98.1% for Li metal anode is achieved. The well protection of the Li metal anode and the excellent cyclability and rate capability of the 4-V Li metal batteries have been obtained. This is attributed to the formation of a robust, denser, more polymeric and higher ionic conductive surface film on the Li metal anode via the electrochemical reductive decompositions of the electrolyte components and the ring-opening polymerization of additives and cyclic carbonate solvents. The key findings of this work emphasize that the optimization of solvent compositions and the manipulation of the additives are facile and effective to enhance the Li metal battery performances.

Authors:
 [1]; ORCiD logo [2];  [2]; ORCiD logo [2];  [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2]
  1. UNIVERSITY PROGRAMS
  2. BATTELLE (PACIFIC NW LAB)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1525995
Report Number(s):
PNNL-SA-129776
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Advanced Energy Materials
Additional Journal Information:
Journal Volume: 8; Journal Issue: 15
Country of Publication:
United States
Language:
English
Subject:
Li metal batteries, dual-salt electrolyte, additive, solvent optimization, cycling stability

Citation Formats

Li, Xing, Zheng, Jianming, Ren, Xiaodi, Engelhard, Mark H., Zhao, Wengao, Li, Qiuyan, Zhang, Jiguang, and Xu, Wu. Dendrite-Free and Performance-Enhanced Lithium Metal Batteries through Optimizing Solvent Compositions and Adding Combinational Additives. United States: N. p., 2018. Web. doi:10.1002/aenm.201703022.
Li, Xing, Zheng, Jianming, Ren, Xiaodi, Engelhard, Mark H., Zhao, Wengao, Li, Qiuyan, Zhang, Jiguang, & Xu, Wu. Dendrite-Free and Performance-Enhanced Lithium Metal Batteries through Optimizing Solvent Compositions and Adding Combinational Additives. United States. doi:10.1002/aenm.201703022.
Li, Xing, Zheng, Jianming, Ren, Xiaodi, Engelhard, Mark H., Zhao, Wengao, Li, Qiuyan, Zhang, Jiguang, and Xu, Wu. Fri . "Dendrite-Free and Performance-Enhanced Lithium Metal Batteries through Optimizing Solvent Compositions and Adding Combinational Additives". United States. doi:10.1002/aenm.201703022.
@article{osti_1525995,
title = {Dendrite-Free and Performance-Enhanced Lithium Metal Batteries through Optimizing Solvent Compositions and Adding Combinational Additives},
author = {Li, Xing and Zheng, Jianming and Ren, Xiaodi and Engelhard, Mark H. and Zhao, Wengao and Li, Qiuyan and Zhang, Jiguang and Xu, Wu},
abstractNote = {The instability of lithium (Li) metal anode due to the dendritic growth and low Coulombic efficiency hinders the practical application of the well-regarded high-energy-density Li metal batteries. Here we report the systematic studies of improving the stability of Li metal anode and the electrochemical performances of the related Li metal batteries through the addition of combinational additives and the optimization of solvent compositions in dual-salt/carbonate electrolytes. A dendrite-free and high Coulombic efficiency of 98.1% for Li metal anode is achieved. The well protection of the Li metal anode and the excellent cyclability and rate capability of the 4-V Li metal batteries have been obtained. This is attributed to the formation of a robust, denser, more polymeric and higher ionic conductive surface film on the Li metal anode via the electrochemical reductive decompositions of the electrolyte components and the ring-opening polymerization of additives and cyclic carbonate solvents. The key findings of this work emphasize that the optimization of solvent compositions and the manipulation of the additives are facile and effective to enhance the Li metal battery performances.},
doi = {10.1002/aenm.201703022},
journal = {Advanced Energy Materials},
number = 15,
volume = 8,
place = {United States},
year = {2018},
month = {5}
}