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Title: Polycation ionic liquid tailored PEO-based solid polymer electrolytes for high temperature lithium metal batteries

Abstract

Poly(ethylene oxide) (PEO)-based polymer electrolytes are promising candidates for solid-state electrolytes in safer, next generation lithium metal batteries. Despite their benefits however, PEO-based electrolyte exhibits highly crystalline ethylene oxide chains that provide poor ionic conductivity and, thus severely limit its practical application. Here, we report the use of hydroxypropyl trimethylammonium bis(trifluoromethane) sulfonimide chitosan salt (HACC-TFSI), which is an amorphous poly(ionic liquid) based biomass chitosan derivative, as a modifier for PEO-based solid polymer electrolytes (SPEs) to address these deficiencies. Hybrid SPEs with HACC-TFSI display enlarged amorphous regions with enhanced ionic conductivity. Interactions between quaternary ammonium cations and TFSI-anions in hybrid SPEs are also found to promote dissociation between Li+ and TFSI-, which further increases ionic mobility. Moreover, the electrochemical stability, mechanical strength, and thermal stability of hybrid SPEs are collectively superior to blank SPEs without HACC-TFSI. LiFePO4/SPEs/Li full-cells assembled using 10wt% HACC-TFSI in PEO (10%HACC-TFSI/SPEs) electrolyte provide a capacity of 161.3 mAh g-1 and operate with excellent cycle performances at 0.2 C and 60 C. Finally, even when the temperature is increased to 150 C, LiFePO4/SPEs/Li cells with 10%HACC-TFSI/SPEs still display remarkable cycle performance with 73% capacity retention after 100 cycles at 1 C rate.

Authors:
 [1];  [2];  [3];  [3];  [4];  [4];  [2];  [2];  [2];  [4];  [2];  [3]
  1. South China Univ. of Technology (SCUT), Guangzhou (China); Shenzhen University (China)
  2. Shenzhen University (China)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. South China Univ. of Technology (SCUT), Guangzhou (China)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office; National Natural Science Foundation of China (NSFC)
OSTI Identifier:
1774582
Grant/Contract Number:  
AC02-06CH11357; 2019A151501675; 2017A030313130; JCYJ20180305125106329; ZDSYS201707271014468; 827-000273; KQJSCX20180328094001794; KQTD2016053112042971; 2016A030306027; 201904010078; 2019T120725; 2019M652882; 2020C03
Resource Type:
Accepted Manuscript
Journal Name:
Energy Storage Materials
Additional Journal Information:
Journal Volume: 33; Journal ID: ISSN 2405-8297
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; chitosan; ionic conductivities; lithium metal batteries; poly(ionic liquid); solid polymer electrolytes

Citation Formats

Tan, Jiewen, Ao, Xin, Dai, Alvin, Yuan, Yifei, Zhuo, Hao, Lu, Hao, Zhuang, Libin, Ke, Yuxuan, Su, Chenliang, Peng, Xinwen, Tian, Bingbing, and Lu, Jun. Polycation ionic liquid tailored PEO-based solid polymer electrolytes for high temperature lithium metal batteries. United States: N. p., 2020. Web. doi:10.1016/j.ensm.2020.08.009.
Tan, Jiewen, Ao, Xin, Dai, Alvin, Yuan, Yifei, Zhuo, Hao, Lu, Hao, Zhuang, Libin, Ke, Yuxuan, Su, Chenliang, Peng, Xinwen, Tian, Bingbing, & Lu, Jun. Polycation ionic liquid tailored PEO-based solid polymer electrolytes for high temperature lithium metal batteries. United States. https://doi.org/10.1016/j.ensm.2020.08.009
Tan, Jiewen, Ao, Xin, Dai, Alvin, Yuan, Yifei, Zhuo, Hao, Lu, Hao, Zhuang, Libin, Ke, Yuxuan, Su, Chenliang, Peng, Xinwen, Tian, Bingbing, and Lu, Jun. Sat . "Polycation ionic liquid tailored PEO-based solid polymer electrolytes for high temperature lithium metal batteries". United States. https://doi.org/10.1016/j.ensm.2020.08.009. https://www.osti.gov/servlets/purl/1774582.
@article{osti_1774582,
title = {Polycation ionic liquid tailored PEO-based solid polymer electrolytes for high temperature lithium metal batteries},
author = {Tan, Jiewen and Ao, Xin and Dai, Alvin and Yuan, Yifei and Zhuo, Hao and Lu, Hao and Zhuang, Libin and Ke, Yuxuan and Su, Chenliang and Peng, Xinwen and Tian, Bingbing and Lu, Jun},
abstractNote = {Poly(ethylene oxide) (PEO)-based polymer electrolytes are promising candidates for solid-state electrolytes in safer, next generation lithium metal batteries. Despite their benefits however, PEO-based electrolyte exhibits highly crystalline ethylene oxide chains that provide poor ionic conductivity and, thus severely limit its practical application. Here, we report the use of hydroxypropyl trimethylammonium bis(trifluoromethane) sulfonimide chitosan salt (HACC-TFSI), which is an amorphous poly(ionic liquid) based biomass chitosan derivative, as a modifier for PEO-based solid polymer electrolytes (SPEs) to address these deficiencies. Hybrid SPEs with HACC-TFSI display enlarged amorphous regions with enhanced ionic conductivity. Interactions between quaternary ammonium cations and TFSI-anions in hybrid SPEs are also found to promote dissociation between Li+ and TFSI-, which further increases ionic mobility. Moreover, the electrochemical stability, mechanical strength, and thermal stability of hybrid SPEs are collectively superior to blank SPEs without HACC-TFSI. LiFePO4/SPEs/Li full-cells assembled using 10wt% HACC-TFSI in PEO (10%HACC-TFSI/SPEs) electrolyte provide a capacity of 161.3 mAh g-1 and operate with excellent cycle performances at 0.2 C and 60 C. Finally, even when the temperature is increased to 150 C, LiFePO4/SPEs/Li cells with 10%HACC-TFSI/SPEs still display remarkable cycle performance with 73% capacity retention after 100 cycles at 1 C rate.},
doi = {10.1016/j.ensm.2020.08.009},
journal = {Energy Storage Materials},
number = ,
volume = 33,
place = {United States},
year = {Sat Aug 29 00:00:00 EDT 2020},
month = {Sat Aug 29 00:00:00 EDT 2020}
}

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