Constructing Star-Shaped Compound to Improve the Performance of Cross-Linked Solid Polymer Electrolytes

WANG Wanhui; WANG Chunjuan; HU Ji

doi:10.6054/j.jscnun.2024019

Journal of South China Normal University (Natural Science Edition) > 2024 > 56(2): 25-31. > DOI: 10.6054/j.jscnun.2024019

WANG Wanhui, WANG Chunjuan, HU Ji. Constructing Star-Shaped Compound to Improve the Performance of Cross-Linked Solid Polymer Electrolytes[J]. Journal of South China Normal University (Natural Science Edition), 2024, 56(2): 25-31. DOI: 10.6054/j.jscnun.2024019

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Constructing Star-Shaped Compound to Improve the Performance of Cross-Linked Solid Polymer Electrolytes

WANG Wanhui¹,
WANG Chunjuan¹,
HU Ji^{1, 2, 3, ,}

1.
School of Materials Science and Engineering, School of Environmental Engineering and Chemistry, Luoyang Institute of Science and Technology, Luoyang 471023, China
2.
Henan Province International Joint Laboratory of Materials for Solar Energy Conversion and Lithium Sodium based Battery, Luoyang 471023, China
3.
Henan Intelligent Manufacturing Engineering Technology Research Center for Building Profile, Luoyang 471023, China

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Received Date: March 10, 2023
Available Online: June 21, 2024

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Abstract

Abstract

The star-shaped compound was fabricated by a UV irradiation reaction between trimethylolpropane tris(3-mercaptopropionate) (TMPMP) or pentaerythritol tetrakis(3-mercaptopropionate) (PETMP) with the introduction of poly(ethylene glycol) methacrylate (PEGMA) follow the mechanism of thiol-acrylate click chemistry. Additionally, PETMP or TMPMP is used as the crosslinker in the system, and PEGMA is used as the branch chain of the star-shaped compound. The structure of the compound can be tuned by utilizing different crosslinker combined with varying the molecular weight of PEGMA, effectively. By blending the prepared star-shaped compound into a kind of cross-linked solid polymer electrolytes (SPEs), the mechanical and electrochemical performances of this SPEs are improved simultaneously. In particular, the tensile strength, Young's modulus, elongation at break, tensile toughness, and ionic conductivity at room temperature of the product is 83.9 MPa, 180.4 MPa, 49.9%, 22.6 MJ/m³, and 2.8×10^-5 S/cm, respectively. The discharge capacity of the solid-state lithium metal batteries assembled by the fabricated SPEs reaches 111.5 mAh/g at 0.1C after 100 cycles, indicating nearly 77% of the capacity maintaining.
- star-shaped compound,
- mechanical performances,
- solid polymer electrolytes,
- lithium metal batteries

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