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Coal-based 3D hierarchical porous carbon aerogels for high performance and super-long life supercapacitors.


ABSTRACT: Coal-based 3D hierarchical porous carbon aerogels (3D HPCAs) has been successfully fabricated from a freeze-drying method and with subsequent of calcination process, using coal oxide as carbon precursors, and PVA as both cross-linking agent and sacrifice template. The 3D HPCAs, using as electrode materials for supercapacitors, display outstanding electrochemical performance. The optimal sample (HPCAs-0.4-800) presents a high specific capacitance of 260?F?g-1 at 1?A?g-1, and exhibits considerable rate capability with the retention of 81% at 10?A?g-1. Notably, HPCAs-0.4-800 shows an excellent cycling stability with 105% of the capacitance retention after 50000 cycles at 10?A?g-1, attributing to its unique hierarchical porosity, high surface area up to 1303 m2 g-1, and improved conductivity. This work offers a promising route to synthesize coal-based porous carbon aerogels electrode materials for supercapacitors.

SUBMITTER: Lv Y 

PROVIDER: S-EPMC7184571 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature

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Coal-based 3D hierarchical porous carbon aerogels for high performance and super-long life supercapacitors.

Lv Yan Y   Ding Lili L   Wu Xueyan X   Guo Nannan N   Guo Jixi J   Hou Shengchao S   Tong Fenglian F   Jia Dianzeng D   Zhang Hongbo H  

Scientific reports 20200427 1


Coal-based 3D hierarchical porous carbon aerogels (3D HPCAs) has been successfully fabricated from a freeze-drying method and with subsequent of calcination process, using coal oxide as carbon precursors, and PVA as both cross-linking agent and sacrifice template. The 3D HPCAs, using as electrode materials for supercapacitors, display outstanding electrochemical performance. The optimal sample (HPCAs-0.4-800) presents a high specific capacitance of 260 F g<sup>-1</sup> at 1 A g<sup>-1</sup>, and  ...[more]

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