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

doi:10.12028/j.issn.2095-4239.2017.0053

Energy Storage Science and Technology ›› 2018, Vol. 7 ›› Issue (1): 56-.doi: 10.12028/j.issn.2095-4239.2017.0053

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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

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

Abstract

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

PEI Haijuan, GUO Rui, LI Yong, LIU Wen, CHEN Zhujun, WANG Yong, XIE Jingying. Conductive carbon-coated separator for high sulfur-loading lithium sulfur batteries[J]. Energy Storage Science and Technology, 2018, 7(1): 56-.

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

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