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Title: Ultralight and fire-extinguishing current collectors for high-energy and high-safety lithium-ion batteries

Abstract

Inactive components and safety hazards are two critical challenges in realizing high-energy lithium-ion batteries. Metal foil current collectors with high density are typically an integrated part of lithium-ion batteries yet deliver no capacity. Meanwhile, high-energy batteries can entail increased fire safety issues. Here we report a composite current collector design that simultaneously minimizes the ‘dead weight’ within the cell and improves fire safety. An ultralight polyimide-based current collector (9 μm thick, specific mass 1.54 mg cm-2) is prepared by sandwiching a polyimide embedded with triphenyl phosphate flame retardant between two superthin Cu layers (~500 nm). Compared to lithium-ion batteries assembled with the thinnest commercial metal foil current collectors (~6 µm), batteries equipped with our composite current collectors can realize a 16-26% improvement in specific energy and rapidly self-extinguish fires under extreme conditions such as short circuits and thermal runaway.

Authors:
ORCiD logo [1];  [1]; ORCiD logo [1]; ORCiD logo [1];  [1];  [1];  [1];  [1];  [1];  [1]; ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [1]; ORCiD logo [1];  [1];  [1]; ORCiD logo [2]
  1. Stanford Univ., CA (United States)
  2. Stanford Univ., 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 Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1769258
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Nature Energy
Additional Journal Information:
Journal Volume: 5; Journal Issue: 10; Journal ID: ISSN 2058-7546
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE

Citation Formats

Ye, Yusheng, Chou, Lien-Yang, Liu, Yayuan, Wang, Hansen, Lee, Hiang Kwee, Huang, Wenxiao, Wan, Jiayu, Liu, Kai, Zhou, Guangmin, Yang, Yufei, Yang, Ankun, Xiao, Xin, Gao, Xin, Boyle, David Thomas, Chen, Hao, Zhang, Wenbo, Kim, Sang Cheol, and Cui, Yi. Ultralight and fire-extinguishing current collectors for high-energy and high-safety lithium-ion batteries. United States: N. p., 2020. Web. doi:10.1038/s41560-020-00702-8.
Ye, Yusheng, Chou, Lien-Yang, Liu, Yayuan, Wang, Hansen, Lee, Hiang Kwee, Huang, Wenxiao, Wan, Jiayu, Liu, Kai, Zhou, Guangmin, Yang, Yufei, Yang, Ankun, Xiao, Xin, Gao, Xin, Boyle, David Thomas, Chen, Hao, Zhang, Wenbo, Kim, Sang Cheol, & Cui, Yi. Ultralight and fire-extinguishing current collectors for high-energy and high-safety lithium-ion batteries. United States. https://doi.org/10.1038/s41560-020-00702-8
Ye, Yusheng, Chou, Lien-Yang, Liu, Yayuan, Wang, Hansen, Lee, Hiang Kwee, Huang, Wenxiao, Wan, Jiayu, Liu, Kai, Zhou, Guangmin, Yang, Yufei, Yang, Ankun, Xiao, Xin, Gao, Xin, Boyle, David Thomas, Chen, Hao, Zhang, Wenbo, Kim, Sang Cheol, and Cui, Yi. Thu . "Ultralight and fire-extinguishing current collectors for high-energy and high-safety lithium-ion batteries". United States. https://doi.org/10.1038/s41560-020-00702-8. https://www.osti.gov/servlets/purl/1769258.
@article{osti_1769258,
title = {Ultralight and fire-extinguishing current collectors for high-energy and high-safety lithium-ion batteries},
author = {Ye, Yusheng and Chou, Lien-Yang and Liu, Yayuan and Wang, Hansen and Lee, Hiang Kwee and Huang, Wenxiao and Wan, Jiayu and Liu, Kai and Zhou, Guangmin and Yang, Yufei and Yang, Ankun and Xiao, Xin and Gao, Xin and Boyle, David Thomas and Chen, Hao and Zhang, Wenbo and Kim, Sang Cheol and Cui, Yi},
abstractNote = {Inactive components and safety hazards are two critical challenges in realizing high-energy lithium-ion batteries. Metal foil current collectors with high density are typically an integrated part of lithium-ion batteries yet deliver no capacity. Meanwhile, high-energy batteries can entail increased fire safety issues. Here we report a composite current collector design that simultaneously minimizes the ‘dead weight’ within the cell and improves fire safety. An ultralight polyimide-based current collector (9 μm thick, specific mass 1.54 mg cm-2) is prepared by sandwiching a polyimide embedded with triphenyl phosphate flame retardant between two superthin Cu layers (~500 nm). Compared to lithium-ion batteries assembled with the thinnest commercial metal foil current collectors (~6 µm), batteries equipped with our composite current collectors can realize a 16-26% improvement in specific energy and rapidly self-extinguish fires under extreme conditions such as short circuits and thermal runaway.},
doi = {10.1038/s41560-020-00702-8},
journal = {Nature Energy},
number = 10,
volume = 5,
place = {United States},
year = {Thu Oct 15 00:00:00 EDT 2020},
month = {Thu Oct 15 00:00:00 EDT 2020}
}

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