Hybrid polyacrylamide/carbon coating on sulfur cathode for advanced lithium sulfur battery. (1st August 2017)

• Record Type: Journal Article
• Authors: Li, Tao; Yuan, Yan; Hong, Bo; Cao, Huawei; Zhang, Kai; Lai, Yanqing; Liu, Yexiang; Huang, Zixin
• Is Part Of: Electrochimica acta. Volume 244(2017)
• Page Start: 192
• Page End: 198
• Publication Date: 2017-08-01
• Subjects: lithium sulfur battery -- conductive coating -- polyacrylamide -- chemical interaction -- polysulfide; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2017.05.081
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Commercialized conductive slurry consisting of polyacrylamide (PAM) and two kinds of carbon black was coated on the surface of sulfur cathode. The hybrid PAM/C coating not only physically blocks but also chemically anchors polysulfides within the cathode, confining their out-diffusion and shuttle. Besides, the flexible and highly-conductive coating layer buffers volume change of the cathode during discharge-charge process and reduces charge transfer resistance. A specific capacity of as high as ∼900 mAh g −1 after 300 cycles is demonstrated for the PAM/C coated cathode, which is a significant improvement of reversible capacity and cycle capability compared to uncoated or conventional PVDF/C coated cathode.