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L-Cysteine-Modified Acacia Gum as a Multifunctional Binder for Lithium-Sulfur Batteries
| 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 | | L-cysteine | | modification |
| 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 https://pubs.acs.org/doi/10.1021/acsami.9b17458 |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/80098 |
| 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)
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Submitter: 高 敏
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