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Title: An Interconnected Channel-Like Framework as Host for Lithium Metal Composite Anodes

Abstract

Lithium (Li) metal anodes have long been counted on to meet the increasing demand for high energy, high–power rechargeable battery systems but they have been plagued by uncontrollable plating, unstable solid electrolyte interphase (SEI) formation, and the resulting low Coulombic efficiency. These problems are even aggravated under commercial levels of current density and areal capacity testing conditions. In this work, the channel–like structure of a carbonized eggplant (EP) as a stable “host” for Li metal melt infusion, is utilized. With further interphase modification of lithium fluoride (LiF), the as–formed EP–LiF composite anode maintains ≈90% Li metal theoretical capacity and can successfully suppress dendrite growth and volume fluctuation during cycling. EP–LiF offers much improved symmetric cell and full–cell cycling performance with lower and more stable overpotential under various areal capacity and elevated rate capability. Furthermore, carbonized EP serves as a light–weight high–performance current collector, achieving an average Coulombic efficiency ≈99.1% in ether–based electrolytes with 2.2 mAh cm–2 cycling areal capacity. Furthermore, the natural structure of carbonized EP will inspire further artificial designs of electrode frameworks for both Li anode and sulfur cathodes, enabling promising candidates for next–generation high–energy density batteries.

Authors:
ORCiD logo [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]; ORCiD logo [2]
  1. Stanford Univ., Stanford, CA (United States)
  2. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1506957
Alternate Identifier(s):
OSTI ID: 1489295
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Advanced Energy Materials
Additional Journal Information:
Journal Volume: 9; Journal Issue: 7; Journal ID: ISSN 1614-6832
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; Coulombic efficiency; host; lithium metal anodes; SEI

Citation Formats

Wang, Hansen, Lin, Dingchang, Xie, Jin, Liu, Yayuan, Chen, Hao, Li, Yanbin, Xu, Jinwei, Zhou, Guangmin, Zhang, Zewen, Pei, Allen, Zhu, Yangying, Liu, Kai, Wang, Kecheng, and Cui, Yi. An Interconnected Channel-Like Framework as Host for Lithium Metal Composite Anodes. United States: N. p., 2019. Web. doi:10.1002/aenm.201802720.
Wang, Hansen, Lin, Dingchang, Xie, Jin, Liu, Yayuan, Chen, Hao, Li, Yanbin, Xu, Jinwei, Zhou, Guangmin, Zhang, Zewen, Pei, Allen, Zhu, Yangying, Liu, Kai, Wang, Kecheng, & Cui, Yi. An Interconnected Channel-Like Framework as Host for Lithium Metal Composite Anodes. United States. doi:10.1002/aenm.201802720.
Wang, Hansen, Lin, Dingchang, Xie, Jin, Liu, Yayuan, Chen, Hao, Li, Yanbin, Xu, Jinwei, Zhou, Guangmin, Zhang, Zewen, Pei, Allen, Zhu, Yangying, Liu, Kai, Wang, Kecheng, and Cui, Yi. Wed . "An Interconnected Channel-Like Framework as Host for Lithium Metal Composite Anodes". United States. doi:10.1002/aenm.201802720. https://www.osti.gov/servlets/purl/1506957.
@article{osti_1506957,
title = {An Interconnected Channel-Like Framework as Host for Lithium Metal Composite Anodes},
author = {Wang, Hansen and Lin, Dingchang and Xie, Jin and Liu, Yayuan and Chen, Hao and Li, Yanbin and Xu, Jinwei and Zhou, Guangmin and Zhang, Zewen and Pei, Allen and Zhu, Yangying and Liu, Kai and Wang, Kecheng and Cui, Yi},
abstractNote = {Lithium (Li) metal anodes have long been counted on to meet the increasing demand for high energy, high–power rechargeable battery systems but they have been plagued by uncontrollable plating, unstable solid electrolyte interphase (SEI) formation, and the resulting low Coulombic efficiency. These problems are even aggravated under commercial levels of current density and areal capacity testing conditions. In this work, the channel–like structure of a carbonized eggplant (EP) as a stable “host” for Li metal melt infusion, is utilized. With further interphase modification of lithium fluoride (LiF), the as–formed EP–LiF composite anode maintains ≈90% Li metal theoretical capacity and can successfully suppress dendrite growth and volume fluctuation during cycling. EP–LiF offers much improved symmetric cell and full–cell cycling performance with lower and more stable overpotential under various areal capacity and elevated rate capability. Furthermore, carbonized EP serves as a light–weight high–performance current collector, achieving an average Coulombic efficiency ≈99.1% in ether–based electrolytes with 2.2 mAh cm–2 cycling areal capacity. Furthermore, the natural structure of carbonized EP will inspire further artificial designs of electrode frameworks for both Li anode and sulfur cathodes, enabling promising candidates for next–generation high–energy density batteries.},
doi = {10.1002/aenm.201802720},
journal = {Advanced Energy Materials},
number = 7,
volume = 9,
place = {United States},
year = {2019},
month = {1}
}

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