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Title: Ultrathin, flexible, solid polymer composite electrolyte enabled with aligned nanoporous host for lithium batteries

Abstract

The urgent need for safer batteries is leading research to all-solid-state lithium-based cells. To achieve energy density comparable to liquid electrolyte-based cells, ultrathin and lightweight solid electrolytes with high ionic conductivity are desired. However, solid electrolytes with comparable thicknesses to commercial polymer electrolyte separators (~10 μm) used in liquid electrolytes remain challenging to make because of the increased risk of short-circuiting the battery. In this work, we report on a polymer–polymer solid-state electrolyte design, demonstrated with an 8.6-μm-thick nanoporous polyimide (PI) film filled with polyethylene oxide/lithium bis(trifluoromethanesulfonyl)imide (PEO/LiTFSI) that can be used as a safe solid polymer electrolyte. The PI film is nonflammable and mechanically strong, preventing batteries from short-circuiting even after more than 1,000 h of cycling, and the vertical channels enhance the ionic conductivity (2.3 × 10 -4 S cm -1 at 30 °C) of the infused polymer electrolyte. Lastly, all-solid-state lithium-ion batteries fabricated with PI/PEO/LiTFSI solid electrolyte show good cycling performance (200 cycles at C/2 rate) at 60 °C and withstand abuse tests such as bending, cutting and nail penetration.

Authors:
 [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [3];  [1];  [1]; ORCiD logo [1];  [1];  [1]; ORCiD logo [1];  [1];  [1];  [1];  [3]; ORCiD logo [1]; ORCiD logo [4]
  1. Stanford Univ., CA (United States)
  2. ShanghaiTech Univ. (China)
  3. Pennsylvania State Univ., University Park, PA (United States)
  4. 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 Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1546972
Grant/Contract Number:  
AC02-76SF00515; EE0007803
Resource Type:
Accepted Manuscript
Journal Name:
Nature Nanotechnology
Additional Journal Information:
Journal Volume: 14; Journal Issue: 7; Journal ID: ISSN 1748-3387
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE

Citation Formats

Wan, Jiayu, Xie, Jin, Kong, Xian, Liu, Zhe, Liu, Kai, Shi, Feifei, Pei, Allen, Chen, Hao, Chen, Wei, Chen, Jun, Zhang, Xiaokun, Zong, Linqi, Wang, Jiangyan, Chen, Long-Qing, Qin, Jian, and Cui, Yi. Ultrathin, flexible, solid polymer composite electrolyte enabled with aligned nanoporous host for lithium batteries. United States: N. p., 2019. Web. doi:10.1038/s41565-019-0465-3.
Wan, Jiayu, Xie, Jin, Kong, Xian, Liu, Zhe, Liu, Kai, Shi, Feifei, Pei, Allen, Chen, Hao, Chen, Wei, Chen, Jun, Zhang, Xiaokun, Zong, Linqi, Wang, Jiangyan, Chen, Long-Qing, Qin, Jian, & Cui, Yi. Ultrathin, flexible, solid polymer composite electrolyte enabled with aligned nanoporous host for lithium batteries. United States. doi:10.1038/s41565-019-0465-3.
Wan, Jiayu, Xie, Jin, Kong, Xian, Liu, Zhe, Liu, Kai, Shi, Feifei, Pei, Allen, Chen, Hao, Chen, Wei, Chen, Jun, Zhang, Xiaokun, Zong, Linqi, Wang, Jiangyan, Chen, Long-Qing, Qin, Jian, and Cui, Yi. Mon . "Ultrathin, flexible, solid polymer composite electrolyte enabled with aligned nanoporous host for lithium batteries". United States. doi:10.1038/s41565-019-0465-3.
@article{osti_1546972,
title = {Ultrathin, flexible, solid polymer composite electrolyte enabled with aligned nanoporous host for lithium batteries},
author = {Wan, Jiayu and Xie, Jin and Kong, Xian and Liu, Zhe and Liu, Kai and Shi, Feifei and Pei, Allen and Chen, Hao and Chen, Wei and Chen, Jun and Zhang, Xiaokun and Zong, Linqi and Wang, Jiangyan and Chen, Long-Qing and Qin, Jian and Cui, Yi},
abstractNote = {The urgent need for safer batteries is leading research to all-solid-state lithium-based cells. To achieve energy density comparable to liquid electrolyte-based cells, ultrathin and lightweight solid electrolytes with high ionic conductivity are desired. However, solid electrolytes with comparable thicknesses to commercial polymer electrolyte separators (~10 μm) used in liquid electrolytes remain challenging to make because of the increased risk of short-circuiting the battery. In this work, we report on a polymer–polymer solid-state electrolyte design, demonstrated with an 8.6-μm-thick nanoporous polyimide (PI) film filled with polyethylene oxide/lithium bis(trifluoromethanesulfonyl)imide (PEO/LiTFSI) that can be used as a safe solid polymer electrolyte. The PI film is nonflammable and mechanically strong, preventing batteries from short-circuiting even after more than 1,000 h of cycling, and the vertical channels enhance the ionic conductivity (2.3 × 10-4 S cm-1 at 30 °C) of the infused polymer electrolyte. Lastly, all-solid-state lithium-ion batteries fabricated with PI/PEO/LiTFSI solid electrolyte show good cycling performance (200 cycles at C/2 rate) at 60 °C and withstand abuse tests such as bending, cutting and nail penetration.},
doi = {10.1038/s41565-019-0465-3},
journal = {Nature Nanotechnology},
number = 7,
volume = 14,
place = {United States},
year = {2019},
month = {5}
}

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Works referenced in this record:

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