Stabilizing electrode–electrolyte interfaces to realize high-voltage Li||LiCoO2 batteries by a sulfonamide-based electrolyte
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d1ee01265g.pdf
Description
Published version
Size
5.65 MB
Format
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Checksum (MD5)
91528ac0092db95ca4a234f61011ed99
Author(s)
Xue, Weijiang
Gao, Rui
Shi, Zhe
Xiao, Xianghui
Zhang, Wenxu
Zhang, Yirui
Zhu, Yun Guang
Waluyo, Iradwikanari
Li, Yao
Hill, Megan R.
Date Issued
2021
Journal
Energy & Environmental Science
Publisher
Royal Society of Chemistry (RSC)
Citation
Xue, Weijiang, Gao, Rui, Shi, Zhe, Xiao, Xianghui, Zhang, Wenxu et al. 2021. "Stabilizing electrode–electrolyte interfaces to realize high-voltage Li||LiCoO2 batteries by a sulfonamide-based electrolyte." Energy & Environmental Science.
Version
Final published version
Abstract
High-voltage lithium-metal batteries (LMBs) with LiCoO2 (LCO) as the cathode have high volumetric and gravimetric energy densities. However, it remains a challenge for stable cycling of LCO >4.5 VLi. Here we demonstrate that a rationally designed sulfonamide-based electrolyte can greatly improve the cycling stability at high voltages up to 4.7 VLi by stabilizing the electrode–electrolyte interfaces (EEIs) on both the Li-metal anode (LMA) and high-voltage LCO cathode. With the sulfonamide-based electrolyte, commercial LCO cathodes retain 89% and 85% of their capacities after 200 and 100 cycles under high charging voltages of 4.55 VLi and 4.6 VLi, respectively, significantly outperforming traditional carbonate-based electrolytes. The surface degradation, impedance growth, and detrimental side reactions in terms of gas evolution and Co dissolution are well suppressed. Our work demonstrates a promising strategy for designing new electrolytes to realize high-energy Li||LCO batteries.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Massachusetts Institute of Technology. Department of Chemistry
Massachusetts Institute of Technology. Department of Mechanical Engineering
Massachusetts Institute of Technology. Research Laboratory of Electronics
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Creative Commons Attribution 3.0 unported license
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DOI of Published Version
https://doi.org/10.1039/d1ee01265g
