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Suppressing the Shuttle Effect via Polypyrrole-Coated Te Nanotubes for Advanced Na?Te Batteries

Authors
Kim, MihyunKim, HyosikKim, WonLee, Song YeulPark, Yong IlShim, Yun A.Jeon, Tae-YeolKim, Jae-YupAhn, Chi YeongShim, Hyung wonLee, Ji EunYu, Seung-Ho
Issue Date
7월-2024
Publisher
American Chemical Society
Keywords
tellurium nanotubes; polypyrrole coating; 1Dnanostructure; operando imaging; sodium-ion batteries; shuttle effect
Citation
ACS Applied Materials & Interfaces, v.16, pp 34892 - 34901
Pages
10
Journal Title
ACS Applied Materials & Interfaces
Volume
16
Start Page
34892
End Page
34901
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/10411
DOI
10.1021/acsami.4c03576
ISSN
1944-8244
1944-8252
Abstract
There is a growing demand for research and development of advanced energy storage devices with high energy density utilizing earth-abundant metal anodes such as sodium metal. Tellurium, a member of the chalcogen group, stands out as a promising cathode material due to its remarkable volumetric capacity, comparable to sulfur, and significantly high electrical conductivity. However, critical issues arise from soluble sodium polytellurides, leading to the shuttle effect. This phenomenon can result in the loss of active materials, self-discharge, and anode instability. Here, we introduce polypyrrole-coated tellurium nanotubes as the cathode materials, where polypyrrole plays a crucial role in preventing the dissolution of polytellurides, as confirmed through operando optical microscopy. The polypyrrole-coated tellurium nanotubes exhibited an outstanding rate performance and long cycle stability in sodium?tellurium batteries. These research findings are anticipated to bolster the viability of polypyrrole-coated tellurium nanotubes as promising cathode materials, making a substantial contribution to the commercialization of sodium-ion battery technology.
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친환경해양개발연구본부 (친환경연료추진연구센터)
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