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Collectively Exhaustive MXene and Graphene Oxide Multilayer for Suppressing Shuttling Effect in Flexible Lithium Sulfur Battery

Authors
Nam, SangheeKim, JaehwanNguyen, Van HiepMahato, ManmathaOh, SaewoongThangasamy, PitchaiAhn, Chi WonOh, Il-Kwon
Issue Date
May-2022
Publisher
WILEY
Keywords
multilayer; MXene; graphene oxide; flexible; lithium sulfur batteries
Citation
ADVANCED MATERIALS TECHNOLOGIES, v.7, no.5
Journal Title
ADVANCED MATERIALS TECHNOLOGIES
Volume
7
Number
5
URI
https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/20292
DOI
10.1002/admt.202101025
ISSN
2365-709X
Abstract
The shuttling effect of lithium polysulfide (LiPS), which leads to the gravest capacity degradation, is one of the critical problems to hindering the commercialization of lithium-sulfur batteries (LSBs). Here, collectively exhaustive Ti3C2Tx MXene and graphene oxide (GO) multilayers are reported to suppress the shuttling effect by utilizing both physical inhibition of micro/mesoporous and chemical absorption of surface functional groups. The abundant surface functional groups of GO and MXene attract the positively charged lithium ion (Li+) and eject the negatively charged polysulfides (S-n(2-)) through electrostatic affinity and repulsion. A simple approach using vacuum filtration is utilized to encapsulate elemental sulfur (S-8) between GO and MXene film (GSM), acting as a permselective separator and functionalized current collector, respectively. The functionally antagonistic GSM directly plays a role in a cathode for LSBs and exhibits a specific capacity of 1425 mAh g(-1) at 0.1C in the initial cycle. The abundant functional groups, which can chemisorb the LiPSs, result in a high cyclic retention of approximate to 85.1% after 500 cycles. Furthermore, a flexible LSB is demonstrated with a PEO-LiTFSI electrolyte based on the flexibility of the exceptionally thin GSM due to the 2D nanomaterials, MXene and graphene oxide.
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