Microporous bamboo biochar for lithium−sulfur batteries

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Author(s)
Gu, Xingxing
Wang, Yazhou
Lai, Chao
Qiu, Jingxia
Li, Sheng
Hou, Yanglong
Martens, Wayde
Mahmood, Nasir
Zhang, Shanqing
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2015
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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

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Nano Research

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8

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1

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© 2015 Tsinghua University Press, co-published with Springer-Verlag GmbHs. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. The original publication is available at www.springerlink.com

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Nanomaterials

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