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Hierarchical Porous Carbon Derived from Peanut Hull for Polysulfide Confinement in Lithium–Sulfur Batteries
Author(s) -
Li Min,
Hu Peng,
Wang Xing,
Niu Zhihao,
Zhou Qihao,
Wang Qiuyue,
Zhu Mingming,
Guo Cong,
Zhang Lei,
Lu Jianyong,
Li Jingfa
Publication year - 2019
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201800898
Subject(s) - polysulfide , dissolution , electrolyte , materials science , cathode , electrode , nanotechnology , conductivity , lithium–sulfur battery , lithium (medication) , porosity , sulfur , chemical engineering , carbon fibers , battery (electricity) , electrical conductor , composite material , chemistry , metallurgy , medicine , composite number , engineering , endocrinology , power (physics) , physics , quantum mechanics
The main issues of lithium–sulfur (Li–S) batteries, including the insulating properties of electrode materials and the dissolution of lithium polysulfides into electrolytes, hinder their further development. Encapsulating S with a conductive agent is considered as an effective way to address these issues. The electrical conductivity of the electrode is substantially improved by the addition of a conductive agent. Furthermore, the polysulfide dissolution is also effectively suppressed by the physical/chemical confinement of the additives. An exploration of new encapsulation agents for the S cathode–hierarchical porous carbon derived from a peanut hull is reported. Such structures comprise the 3D interconnected network carbon and abundant meso/micropores, which significantly improve the electronic conductivity and effectively suppress the polysulfide dissolution. The high S loading, long lifespan, and great rate capability empower such a strategy to be an effective way to push the Li–S battery to further development.