High-Performance Gel Polymer Electrolyte with Self-Healing Capability for Lithium-Ion Batteries

被引：30

作者：

Chen, Xiaoyi ^{[1
]}

Yi, Lingguang ^{[1
]}

Zou, Changfei ^{[1
]}

Liu, Jiali ^{[1
]}

Yu, Jun ^{[1
]}

Zang, Zihao ^{[1
]}

Tao, Xiyuan ^{[1
]}

Luo, Zhigao ^{[1
]}

Guo, Xiaowei ^{[2
]}

Chen, Gairong ^{[2
]}

Chang, Baobao ^{[3
]}

Shen, Yongqiang ^{[4
]}

Wang, Xianyou ^{[1
]}

机构：

[1] Xiangtan Univ, Natl Local Joint Engn Lab Key Mat New Energy Stor, Natl Base Int Sci & Technol Cooperat,Sch Chem, Hunan Prov Key Lab Electrochem Energy Storage & C, Xiangtan 411105, Hunan, Peoples R China

[2] Xinxiang Coll, Sch Chem & Mat Engn, Xinxiang 453003, Henan, Peoples R China

[3] Zhengzhou Univ, Minist Educ, Key Lab Mat Proc & Mold, Zhengzhou 450001, Henan, Peoples R China

[4] Jishou Univ, Natl Demonstrat Ctr Expt Chem Educ, Jishou 416000, Hunan, Peoples R China

来源：

ACS APPLIED ENERGY MATERIALS | 2022年 / 5卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Supramolecular polymers; Cross-linked network; Gel polymer electrolyte; Self-healing; Lithium-ion battery; NETWORKS; DESIGN;

D O I：

10.1021/acsaem.2c00713

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Polymer electrolytes (PEs) are predicted to be an alternative to liquid electrolytes for lithium-ion batteries (LIBs) since they can overcome the problems of leakage and electrolyte flammability issues. However, polymer electrolytes often suffer from disappointing cracks or breakage, which will lead to short circuits and bring some safety issues. Furthermore, the undesirable ionic conductivity at room temperature also limits their practical application. Here, a novel gel polymer electrolyte (GPE) was proposed. The cross-linking network was formed by adding supramolecular copolymer PEG-UPy to the cross-linking matrix of poly(ethylene oxide) (PEO) and polyvinylidene fluoride hexafluoropropylene (PVDF-HFP), and the resulting GPE has the advantages of good flexibility, high mechanical strength, high ionic conductivity (7.5 x 10(-4) S cm(-1), RT) and can be self-repaired without external stimulation. In addition, the GPE exhibits good interfacial stability with the electrode, which can be used in high-performance lithium-ion batteries with stable reversible electrochemical reactions and excellent cycling stability.

引用

页码：5267 / 5276

页数：10

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