Microporous bamboo biochar for lithium-sulfur batteries

Gu, Xingxing, Wang, Yazhou, Lai, Chao, Qiu, Jingxia, Li, Sheng, Hou, Yanglong, Martens, Wayde, Mahmood, Nasir, & Zhang, Shanqing (2015) Microporous bamboo biochar for lithium-sulfur batteries. Nano Research, 8(1), pp. 129-139.

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Abstract

Being simple, inexpensive, scalable and environmentally friendly, microporous biomass biochars have been attracting enthusiastic attention for application in lithium-sulfur (Li-S) batteries. Herein, porous bamboo biochar is activated via a KOH/annealing process that creates a microporous structure, boosts surface area and enhances electronic conductivity. The treated sample is used to encapsulate sulfur to prepare a microporous bamboo carbon-sulfur (BC-S) nanocomposite for use as the cathode for Li-S batteries for the first time. The BC-S nanocomposite with 50 wt.% sulfur content delivers a high initial capacity of 1,295 mA·h/g at a low discharge rate of 160 mA/g and high capacity retention of 550 mA·h/g after 150 cycles at a high discharge rate of 800 mA/g with excellent coulombic efficiency (⩾95%). This suggests that the BC-S nanocomposite could be a promising cathode material for Li-S batteries.

Impact and interest:

46 citations in Scopus
44 citations in Web of Science®
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ID Code: 88611
Item Type: Journal Article
Refereed: Yes
Keywords: biochars, lithium-sulfur batteries, microporous structure, bamboo carbon–sulfur composites
DOI: 10.1007/s12274-014-0601-1
ISSN: 1998-0124
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 05 Nov 2015 04:43
Last Modified: 05 Nov 2015 04:45

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