Hybrid polyacrylamide/carbon coating on sulfur cathode for advanced lithium sulfur battery
作者： Tao Li , Yan Yuan , Bo Hong , Huawei Cao , Kai Zhang
DOI: 10.1016/J.ELECTACTA.2017.05.081
关键词: Cathode 、 Chemical engineering 、 Layer (electronics) 、 Lithium–sulfur battery 、 Carbon black 、 Sulfur 、 Coating 、 Polysulfide 、 Inorganic chemistry 、 Polyacrylamide 、 Materials science
摘要: Abstract Commercialized conductive slurry consisting of polyacrylamide (PAM) and two kinds carbon black was coated on the surface sulfur cathode. The hybrid PAM/C coating not only physically blocks but also chemically anchors polysulfides within cathode, confining their out-diffusion shuttle. Besides, flexible highly-conductive layer buffers volume change cathode during discharge-charge process reduces charge transfer resistance. A specific capacity as high ∼900 mAh g−1 after 300 cycles is demonstrated for which a significant improvement reversible cycle capability compared to uncoated or conventional PVDF/C
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