Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4766924 | Electrochimica Acta | 2017 | 28 Pages |
Abstract
The hierarchical porous carbon materials with specific areas from 3425.688Â m2Â gâ1 to 988.768Â m2Â gâ1 and total pores volumes from 1.979Â cm3Â gâ1 to 0.434Â cm3Â gâ1 were prepared by carbonization of the polypyrrole precursor and activated with potassium hydroxide under different activation conditions. Among them, two kinds of hierarchical porous carbon materials with similar high specific surface area were investigated by SEM, TEM, XRD, BET and electrochemical methods after loading 70Â wt% sulfur in micropores, in order to study the key role of the micro-/mesoporous carbonaceous structure in influencing the electrochemical performance of sulfur. The test results show that the hierarchical porous carbon with higher mesopores content exhibited better cycle and rate performance after loading 70Â wt% sulfur, attributing to the efficient penetration of electrolyte and migration of Li+.
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Authors
Bo Zhang, Yingming Zhao, Jia Liu, Xiuling Wang, Dejun Li, Xifei Li,