NDLI: 3D hybrid of $Co_{9}S_{8}$ and N-doped carbon hollow spheres as effective hosts for Li-S batteries

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3D hybrid of $Co_{9}S_{8}$ and N-doped carbon hollow spheres as effective hosts for Li-S batteries

Content Provider	Scilit
Author	Lin, Weijuan He, Guoqiang Huang, Yingheng Chen, Xiyong
Copyright Year	2019
Description	Journal: Nanotechnology Lithium sulfur (Li-S) batteries as a new generation of high energy batteries, with low cost and environmentally friendly, will have a broad application prospect. While the poor conductivity of sulfur, volume effect and "shuttle effect" during charge and discharge, and slow redox kinetics of polysulfide intermediates still limit the practical application. Here, to solve these problems, we synthesize a valid 3D hybrid material (Co9S8@N-CHS) of nanosized Co9S8 evenly distributed on N-doped carbon hollow spheres with strong chemical coupling by in-situ carbonization of Co(NO3)2@resorcinol/formaldehyde and sulfidation. It presents a high electronic conductivity, absorbing chemical adsorption capability to polysulfides and can catalyze the sulfur redox processes. Comparing with S/AC and S/N-CHS electrodes, S/Co9S8@N-CHS electrode achieves an excellent initial discharge specific capacity of 1337 mAh g-1 at 0.1 C and a long cycle life with a ultralow capacity decay of 0.027% per cycle over 1000 cycles at 1.0 C and the coulombic efficiency is above 99%. Thence, it is an effective sulfur host material for high performance Li-S batteries.
Related Links	https://iopscience.iop.org/article/10.1088/1361-6528/ab4841/pdf
ISSN	09574484
e-ISSN	13616528
DOI	10.1088/1361-6528/ab4841
Journal	Nanotechnology
Issue Number	3
Volume Number	31
Language	English
Publisher	IOP Publishing
Publisher Date	2019-09-26
Access Restriction	Open
Subject Keyword	Journal: Nanotechnology Chemical Engineering
Content Type	Text
Resource Type	Article
Subject	Chemistry Nanoscience and Nanotechnology Mechanics of Materials Mechanical Engineering Bioengineering Electrical and Electronic Engineering

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