储能科学与技术 ›› 2018, Vol. 7 ›› Issue (1): 56-.doi: 10.12028/j.issn.2095-4239.2017.0053

• 研究及进展 • 上一篇    下一篇

导电碳修饰隔膜在高硫载量锂硫电池中的作用

裴海娟，郭  瑞，李  永，刘  雯，陈珠君，王  勇，解晶莹   

  1. 空间电源技术国家重点实验室，上海空间电源研究所，上海 200245
  • 收稿日期:2017-05-08 修回日期:2017-06-08 出版日期:2018-01-01 发布日期:2018-01-01
  • 通讯作者: 解晶莹，研究员，主要研究方向为锂离子电池、新型动力电池、金属锂电池等，E-mail：xiejingying2007@126.com。
  • 作者简介:裴海娟（1986—），女，工程师，主要研究方向为锂硫电池正极材料、隔膜材料，E-mail：phjgwt613@126.com
  • 基金资助:
    国家自然科学基金项目（21373137）

Conductive carbon-coated separator for high sulfur-loading lithium sulfur batteries

PEI Haijuan, GUO Rui, LI Yong, LIU Wen, CHEN Zhujun, WANG Yong, XIE Jingying   

  1. State Key Laboratory of Space Power Technology, Shanghai Institute of Space Power-sources, Shanghai 200245, China
  • Received:2017-05-08 Revised:2017-06-08 Online:2018-01-01 Published:2018-01-01

PDF

376

被引次数

3

摘要： 研究了分别以乙炔黑、科琴黑、Super P、气相生长碳纤维、石墨烯、碳纳米管、XE-2为正极侧修饰层的隔膜对高硫载量（5.4 mg/cm2）锂硫电池电性能的影响。XE-2、Super P、石墨烯、科琴黑、气相生长碳纤维涂覆隔膜有助于提高隔膜正极侧的保液能力和导电能力；石墨烯、Super P涂层对多硫化锂有很好的阻挡、吸附作用。涂覆石墨烯的隔膜装配的电池的首次放电比容量可达1007 mA·h/g，远远高于采用空白隔膜的电池（340 mA·h/g），循环100次后放电比容量为539 mA·h/g，仍然高于采用空白隔膜的电池（399 mA·h/g）。

关键词: 锂硫电池, 隔膜, 导电碳修饰, 高硫载量

Abstract:

 The effects of separators consisting of cathode-side functional layers separately composed of acetylene black, Ketjen black, Super P, vapor-grown carbon fiber, graphene, carbon nano-tube and XE-2, on high sulfur-loading（5.4 mg/cm2）lithium sulfur batteries have been investigated. The separators coated by XE-2, Super P, graphene, ketjen black, vapor-grown carbon fiber can improve the electrolyte adsorbility and electrical conductivity of cathode side. Besides, the separators coated by Super P and graphene can obstruct and adsorb lithium polysulfide. The battery with separator coated by graphene delivers a specific capacity as high as 1007 mA·h/g, much higher than that of untreated separator (340 mA·h/g). After 100 cycles, the battery with separator coated by graphene can still maintain a specific discharge capacity of 539 mA·h/g, still higher than that of untreated separator (399 mA·h/g).

Key words: lithium-sulfur battery, separator, conductive carbon-coated, high sulfur-loading