The composite is synthesized under uncommonly extreme condition, which provides dual interactions on polysulfides and Li ion to improve Li-S batteries (IMAGE)
Caption
The graphene oxide (GO) is spontaneously turned into the reduced graphene oxide (rGO) by the reactions with N,O-carboxymethyl chitosan under 1 Pa and -50 ℃. The integrated N,O-carboxymethyl chitosan (CC) not only functions as a binder to connect reduced graphene oxide (rGO) nanosheets in two-dimension for suppressing the shuttle effect of lithium polysulfides via physical barrier effect, but also provides abundant active sites by its heteroatoms with lone pair electrons for repelling polysulfide anions and accelerating lithium-ion transportation. Since the manufacturing process of the laminar N,O-carboxymethyl chitosan-reduced graphene oxide (CC-rGO) composite is green and therefore it is also promising to be applied on large scale for high-performance Li-S batteries.
Credit
By Zhibin Jiang, Lujie Jin, Xiying Jian, Jinxia Huang, Hongshuai Wang, Binhong Wu, Kang Wang, Ling Chen, Youyong Li, Xiang Liu and Weishan Li.
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License
CC BY