• 文献标题:   Manufacturing N,O-carboxymethyl chitosan-reduced graphene oxide under freeze-dying for performance improvement of Li-S battery
  • 文献类型:   Article
  • 作  者:   JIANG ZB, JIN LJ, JIAN XY, HUANG JX, WANG HS, WU BH, WANG K, CHEN L, LI YY, LIU X, LI WS
  • 作者关键词:   composite manufacturing, n, ocarboxymethyl chitosan, reduced graphene oxide, separator, lithiumsulfur battery
  • 出版物名称:   INTERNATIONAL JOURNAL OF EXTREME MANUFACTURING
  • ISSN:   2631-8644 EI 2631-7990
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1088/2631-7990/aca44c
  • 出版年:   2023

▎ 摘  要

Lithium-sulfur (Li-S) batteries can provide far higher energy density than currently commercialized lithium ion batteries, but challenges remain before it they are used in practice. One of the challenges is the shuttle effect that originates from soluble intermediates, like lithium polysulfides. To address this issue, we report a novel laminar composite, N,O-carboxymethyl chitosan-reduced graphene oxide (CC-rGO), which is manufactured via the self-assembly of CC onto GO and subsequent reduction of GO under an extreme condition of 1 Pa and -50 degrees C. The synthesized laminar CC-rGO composite is mixed with acetylene black (AB) and coated on a commercial polypropylene (PP) membrane, resulting in a separator (CC-rGO/AB/PP) that can not only completely suppress the polysulfides penetration, but also can accelerate the lithium ion transportation, providing a Li-S battery with excellent cyclic stability and rate capability. As confirmed by theoretic simulations, this unique feature of CC-rGO is attributed to its strong repulsive interaction to polysulfide anions and its benefit for fast lithium ion transportation through the paths paved by the heteroatoms in CC.