High-performance three-dimensional flower-like CoS/MWCNT composite host for Li–S batteries

Autor:	Pengfei Xie, Bingyin Zhang, Xiaohui Tian, Zhihao Tang, Shengyu Zhao, Yingke Zhou, Angulakshmi Natarajan
Rok vydání:	2021
Předmět:	Materials science Composite number Carbon nanotube Conductivity Condensed Matter Physics Electrochemistry Catalysis law.invention chemistry.chemical_compound Chemical engineering chemistry law Electrode General Materials Science Electrical and Electronic Engineering Dissolution Polysulfide
Zdroj:	Journal of Solid State Electrochemistry. 26:389-400
ISSN:	1433-0768 1432-8488
DOI:	10.1007/s10008-021-05066-x
Popis:	Although lithium–sulfur batteries are promising replacements for conventional lithium-ion batteries, their commercial applications have been limited due to issues such as polysulfide dissolution, volume variation, and low conductivity. To overcome these problems, we designed and hydrothermally synthesized a flower-like three-dimensional CoS/multiwall carbon nanotube (MWCNT) composite as the sulfur host material. The CoS and MWCNTs were tightly joined by chemical bonds to form a stable composite structure. The polar and catalytic CoS can promote the redox process and reduce the dissolution of polysulfides, while the flexible carbon nanotubes can buffer the expansion/shrinkage of the electrode during charging and discharging. CoS/MWCNT-S displays an excellent specific capacity (1120 mAh g−1, 0.1 C) and high capacity retention after 200 cycles (78%, 0.5 C).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7086cc71d28482940aecfcac9c419e1b https://doi.org/10.1007/s10008-021-05066-x Zobrazit plný text záznamu Full text from SpringerLink