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.
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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|Item Type:||Journal Article|
|Keywords:||biochars, lithium-sulfur batteries, microporous structure, bamboo carbon–sulfur composites|
|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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