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L-Cysteine-Modified Acacia Gum as a Multifunctional Binder for Lithium-Sulfur Batteries

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Title: L-Cysteine-Modified Acacia Gum as a Multifunctional Binder for Lithium-Sulfur Batteries
Authors: Qi, Qi Browse this author
Deng, Yaqian Browse this author
Gu, Sichen Browse this author
Gao, Min Browse this author
Hasegawa, Jun-ya Browse this author →KAKEN DB
Zhou, Guangmin Browse this author
Lv, Xiaohui Browse this author
Lv, Wei Browse this author
Yang, Quan-Hong Browse this author
Keywords: multifunctional binder
lithium-sulfur batteries
acacia gum
Issue Date: 26-Dec-2019
Publisher: American Chemical Society
Journal Title: ACS applied materials & interfaces
Volume: 11
Issue: 51
Start Page: 47956
End Page: 47962
Publisher DOI: 10.1021/acsami.9b17458
Abstract: A binder plays an important role in stabilizing the electrode structure and improving the cyclic stability of batteries. However, the traditional binders are no longer satisfactory in lithium-sulfur (Li-S) batteries because of their failure in accommodating the large volume changes of sulfur and trapping soluble intermediate polysulfides, thus causing severe capacity decay. In this work, we prepared a multifunctional binder for Li-S batteries by merely modifying the acacia gum (AG), a low-cost biomass polymer, with L-cysteine under mild conditions. Owing to the introduced amino and carboxyl branches by the L-cysteine, the modified AG shows enhanced polysulfide trapping ability and can effectively restrain the shuttling of polysulfides. In addition, the introduction of branches can help form a cross-linked 3D network with better mechanical strength and flexibility for adhering sulfur and accommodating the volume changes of cathode materials. As a result, compared with the normally used polyvinylidene fluoride binder and the unmodified AG binder, the L-cysteine-modified AG binder effectively enhanced the rate capability and cycling stability of the Li-S batteries directly using sulfur as the cathode, showing a promising way to prompt the practical use of Li-S batteries.
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS applied materials & interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Type: article (author version)
Appears in Collections:触媒科学研究所 (Institute for Catalysis) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 高 敏

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