Highly disordered hard carbon derived from skimmed cotton as a high-performance anode material for potassium-ion batteries

JOURNAL OF POWER SOURCES

卷:396

Article

He, Xiaodong^1,2  Liao, Jiaying^1,2  Tang, Zhongfeng^1,2  Xiao, Lina^1,2  Ding, Xiang^1,2  Hu, Qiao^1,2  Wen, Zhaoyin³  Chen, Chunhua^1,2 

[1] Univ Sci & Technol China, Dept Mat Sci & Engn, CAS Key Lab Mat Energy Convers, Hefei 230026, Anhui, Peoples R China

[2] Univ Sci & Technol China, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Hefei 230026, Anhui, Peoples R China

[3] Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Energy Convers Lab, Shanghai 200050, Peoples R China

关键词: Potassium storage;    Rate performance;    Anode;    Cotton;    Full cell;   

DOI  :  10.1016/j.jpowsour.2018.06.073

来源: Elsevier

【 摘 要 】

Potassium-ion batteries attract tremendous attention for large scale application due to the abundance of K resources. Herein, a highly disordered hard carbon derived from a skimmed cotton is investigated for this purpose. The study shows that a simple soaking treatment in hydrochloric acid for the skimmed cotton before its hight-emperature carbonization can critically impact the structure and the electrochemical properties of the obtained hard carbon significantly. This hard carbon exhibits a high initial coulombic efficiency (73%) and superior cycling stability and rate capability (253mAh g(-1) and 165mAh g(-1) at 40mAg(-1) and 4000mAg(-1), respectively) due to its unique porous architecture and large surface area. The full cell by coupling the hard carbon with a cathode material,i.e. potassium-rich iron hexacyanoferrate shows an outstanding electrochemical performance. These promising properties highlight the potentials of such a hard carbon in practical applications.

【 授权许可】

Free