Porous surfur-doped hard carbon for excellent potassium storage

Publication date: Available online 18 October 2019Source: Chinese Chemical LettersAuthor(s): Xuan Xie, Shihan Qi, Daxiong Wu, Huaping Wang, Fang Li, Xiaoxin Peng, Jinfeng Cai, Jiaojiao Liang, Jianmin MaAbstractHard 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.Graphical AbstractWe synthesize the porous sulfur-doped porous hard carbon by templated method, which 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 for potassium storage.
Source: Chinese Chemical Letters - Category: Chemistry Source Type: research