Porous surfur-doped hard carbon for excellent potassium storage |
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| Authors: | Xuan Xie Shihan Qi Daxiong Wu Huaping Wang Fang Li Xiaoxin Peng Jinfeng Cai Jiaojiao Liang Jianmin Ma |
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| Affiliation: | School of Physics and Electronics, Hunan University, Changsha 410082, China; Yiyang Wanjingyuan Electronics Co., Ltd., Yiyang 413000, China; College of Traffic Engineering, Hunan University of Technology, Zhuzhou 412008, China; Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou University, Zhengzhou 450002, China; State Key Lab of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China |
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| Abstract: | 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 mAh/g after 300 cycles at 1 A/g, and an excellent rate capability with ~100 mAh/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. |
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| Keywords: | Porous carbon Sulfur-doping Hard carbon Anode Potassium-ion battery |
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