Porous surfur-doped hard carbon for excellent potassium storage

We synthesize the porous sulfur-doped porous hard carbon by templated method, which exhibits a long cycling life with ∼191 mAh/g after 300 cycles at 1 A/g, and an excellent rate capability with ∼100 mAh/g at 5 A/g for potassium storage. [Display omitted] Hard carbon is promising anode for potassium-...

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Bibliographic Details
Published in:Chinese chemical letters 2020-01, Vol.31 (1), p.223-226
Main Authors: Xie, Xuan, Qi, Shihan, Wu, Daxiong, Wang, Huaping, Li, Fang, Peng, Xiaoxin, Cai, Jinfeng, Liang, Jiaojiao, Ma, Jianmin
Format: Article
Language:English
Subjects:
Anode
Hard carbon
Porous carbon
Potassium-ion battery
Sulfur-doping
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Summary:We synthesize the porous sulfur-doped porous hard carbon by templated method, which exhibits a long cycling life with ∼191 mAh/g after 300 cycles at 1 A/g, and an excellent rate capability with ∼100 mAh/g at 5 A/g for potassium storage. [Display omitted] Hard carbon is promising anode for potassium-ion batteries (PIBs), however, the poor rate capability hinders its development as potential anode. To address this question, we design a sulfur-doped porous hard carbon (S-HC) for PIBs through the combination of structural design and composition adjustment. The as-designed S-HC exhibits a long cycling life with ∼191 mA h/g after 300 cycles at 1 A/g, and an excellent rate capability with ∼100 mA h/g at 5 A/g, which was attributed to its structural characteristics and compositions. The S-HC demonstrates to be promising anode in the future.
ISSN:1001-8417
1878-5964
DOI:10.1016/j.cclet.2019.10.008