储能科学与技术 ›› 2016, Vol. 5 ›› Issue (4): 397-403.doi: 10.12028/j.issn.2095-4239.2016.04.001

• 特约文章 •    下一篇

多功能添加剂PFPN对可充锂硫电池的影响

沈  旺，雷智鸿，谢李生，杨  军，努丽燕娜，王久林   

  1. 上海电化学能源器件工程技术研究中心，上海交通大学化工系，上海 200240
  • 收稿日期:2016-03-15 修回日期:2016-05-06 出版日期:2016-07-01 发布日期:2016-07-01
  • 通讯作者: 王久林，博士，研究员，主要研究方向为锂硫电池及其关键材料，E-mail：wangjiulin@sjtu.edu.cn。
  • 作者简介:沈旺（1990—），男，硕士研究生，E-mail：sjtusw@sjtu.edu.cn
  • 基金资助:
    国家自然科学基金（51272156，21333007），上海市科委（14JC1491800）及教育部新世纪优秀人才（NCET-13-0371）项目

Multi-functional additive PFPN for rechargeable lithium sulfur battery with composite cathode materials

SHEN Wang, LEI Zhihong, XIE Lisheng, YANG Jun, NULI Yanna, WANG Jiulin   

  1. Shanghai Electrochemical Energy Devices Research Center, Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2016-03-15 Revised:2016-05-06 Online:2016-07-01 Published:2016-07-01

PDF

508

被引次数

5

摘要： 由于具有极高的比容量和丰富的硫资源储量，锂硫电池已成为下一代可充电池研究的热点之一。但锂硫电池中存在较大的安全性隐患，这将阻碍其实际应用。一种高效的阻燃添加剂，乙氧基五氟环磷腈（PFPN）被首次用于锂硫电池。添加5%质量分数的PFPN使得高度易燃的碳酸酯电解液完全不燃，同时减小极化电压，并显著提高硫基复合材料的倍率性能。上述结果表明，PFPN是一种适用于可充锂硫电池的多功能添加剂。

关键词: 阻燃添加剂, PFPN, 功能性电解液, 锂硫电池, 复合正极

Abstract:

 Lithium sulfur (Li/S) is a promising candidate of next generation of rechargeable batteries because of its extremely high specific capacity and abundant natural resources. However, the safety issue might be one of the most important factors which hinder their practical applications. Here a highly effective flame-retarding additive, ethoxypentafluorocyclotriphosphazene (PFPN), is firstly applied in Li/S batteries to improve their thermal safety properties. The addition of about 5% (weight ratio) PFPN makes the highly flammable liquid electrolyte totally nonflammable. Furthermore, the addition of PFPN simultaneously reduces the polarization voltage and obviously enhances the rate capability of sulfur-based composite materials. All these results indicate that PFPN is a favorable flame inhibiting additive in conventional liquid electrolytes for rechargeable lithium sulfur batteries.

Key words: flame retardant, PFPN, functional electrolyte, lithium sulfur batteries, composite cathode