Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7724910 | Journal of Power Sources | 2018 | 9 Pages |
Abstract
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 high-temperature 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 (253â¯mAh gâ1 and 165â¯mAh gâ1 at 40â¯mAâ¯gâ1 and 4000â¯mAâ¯gâ1, 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.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Xiaodong He, Jiaying Liao, Zhongfeng Tang, Lina Xiao, Xiang Ding, Qiao Hu, Zhaoyin Wen, Chunhua Chen,