能源化学(英文版) ›› 2019, Vol. 38 ›› Issue (11): 55-59.DOI: 10.1016/j.jechem.2019.01.004

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Self-assembly synthesis of solid polymer electrolyte with carbonate terminated poly(ethylene glycol) matrix and its application for solid state lithium battery

Bing Yuana, Guangmei Luoa, Jing Liangb, Fangyi Chengb, Wangqing Zhanga,c, Jun Chenb   

  1. a Key Laboratory of Functional Polymer Materials of the Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China;
    b Key Laboratory of Advanced Energy Materials Chemistry of the Ministry of Education, College of Chemistry, Nankai University, Tianjin 300071, China;
    c Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, China
  • 收稿日期:2018-11-09 修回日期:2018-12-29 出版日期:2019-11-15 发布日期:2020-12-18
  • 通讯作者: Fangyi Cheng, fycheng@nankai.edu.cn; Wangqing Zhang, wqzhang@nankai.edu.cn
  • 基金资助:
    This work was supported by the National Science Foundation for Distinguished Young Scholars (No. 21525419), the National Natural Science Foundation of China (No. 21474054), and the National Key Research and Development Program of China (No. 2016YFA0202503).

Self-assembly synthesis of solid polymer electrolyte with carbonate terminated poly(ethylene glycol) matrix and its application for solid state lithium battery

Bing Yuana, Guangmei Luoa, Jing Liangb, Fangyi Chengb, Wangqing Zhanga,c, Jun Chenb   

  1. a Key Laboratory of Functional Polymer Materials of the Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China;
    b Key Laboratory of Advanced Energy Materials Chemistry of the Ministry of Education, College of Chemistry, Nankai University, Tianjin 300071, China;
    c Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, China
  • Received:2018-11-09 Revised:2018-12-29 Online:2019-11-15 Published:2020-12-18
  • Contact: Fangyi Cheng, fycheng@nankai.edu.cn; Wangqing Zhang, wqzhang@nankai.edu.cn
  • Supported by:
    This work was supported by the National Science Foundation for Distinguished Young Scholars (No. 21525419), the National Natural Science Foundation of China (No. 21474054), and the National Key Research and Development Program of China (No. 2016YFA0202503).

摘要: A facile one-pot synthesis of solid polymer electrolytes (SPEs), composed of carbonate terminated poly(ethylene glycol) (CH3O-PEG-IC), poly(ethylene glycol)-block-polystyrene (PEG-b-PS) block copolymer nanoparticles containing a conductive PEG corona, fumed SiO2 and LiTFSI salt via polymerization-induced self-assembly is proposed. This method to prepare SPEs has the advantages of one-pot convenient synthesis, avoiding use of organic solvent and conveniently adding inorganic additives. CH3O-PEG-IC combines advantages of PEG and polycarbonate, the in situ synthesized PEG-b-PS nanoparticles containing a rigid polystyrene (PS) core and a PEG corona guarantee continuous lithium ion transport in the synthesized SPEs, and the fumed SiO2 optimizes the interfacial properties and improves the electrochemical stability, all of which afford SPEs a well considerable room temperature ionic conductivity of 1.73×10-4 S/cm, high lithium transference number of 0.53, and wide electrochemical stability window of 5.5 V (vs. Li+/Li). By employing these SPEs, the assembled solid state cells of LiFePO4|SPEs|Li exhibit considerable cell performance.

关键词: Solid polymer electrolyte, Polymerization-induced self-assembly, Solid-state lithium battery

Abstract: A facile one-pot synthesis of solid polymer electrolytes (SPEs), composed of carbonate terminated poly(ethylene glycol) (CH3O-PEG-IC), poly(ethylene glycol)-block-polystyrene (PEG-b-PS) block copolymer nanoparticles containing a conductive PEG corona, fumed SiO2 and LiTFSI salt via polymerization-induced self-assembly is proposed. This method to prepare SPEs has the advantages of one-pot convenient synthesis, avoiding use of organic solvent and conveniently adding inorganic additives. CH3O-PEG-IC combines advantages of PEG and polycarbonate, the in situ synthesized PEG-b-PS nanoparticles containing a rigid polystyrene (PS) core and a PEG corona guarantee continuous lithium ion transport in the synthesized SPEs, and the fumed SiO2 optimizes the interfacial properties and improves the electrochemical stability, all of which afford SPEs a well considerable room temperature ionic conductivity of 1.73×10-4 S/cm, high lithium transference number of 0.53, and wide electrochemical stability window of 5.5 V (vs. Li+/Li). By employing these SPEs, the assembled solid state cells of LiFePO4|SPEs|Li exhibit considerable cell performance.

Key words: Solid polymer electrolyte, Polymerization-induced self-assembly, Solid-state lithium battery