1. The insight of self-doped phosphorus on the biocarbon substrate: Co3O4 nanocrystals anchored on porous carbon derived from Manila grass for supercapacitor electrode with long life.
- Author
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Sun, Dongya, Huang, Jinxun, Tao, Xinjie, He, Liwen, Zhao, Yican, Gao, Wenhai, Lian, Jiqiong, Sun, Jingjing, and Xie, An
- Subjects
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LONGEVITY , *SUPERCAPACITOR electrodes , *PHOSPHORUS , *NANOCRYSTALS , *ENERGY density , *ENERGY storage - Abstract
• We first explained the interface style of the Co atoms anchored on the carbon substrate derived from biochar systematically. • The self-doped phosphorus inherited from manila grass play an important role of supplying extra capacitance. • The novel hive-like 3D hierarchical carbon skeleton was low cost. • The ASC based on this electrode delivers excellent rate abilities and cycle performance. Hive-like Co 3 O 4 @C composites with well performance were fabricated using Manila grass as a novel carbonous precursor with self-doped phosphorus. [Display omitted] A novel hive-like Co 3 O 4 @C composite is synthesized solvothermally and calcinated using Manila grass as an interesting precursor of porous carbonous skeleton with self-doped phosphorus and oxygen, anchored by Co 3 O 4 nanocryclusters through the sites rich in doped atoms. The capacitance of the as-fabricated materials is 767.6 F·g−1 (1 A·g−1) with long life of 96.2% retention after 12,000 cycles, according with the phosphorus content in composites. Moreover, the supercapacitor is assembled by KC-600 (+) and active-carbon () delivers an energy density of 81.42 Wh·kg 1 at 875 W·kg 1 and satisfactory cycling stabilities (9.17% lost after 24,000 cycles), owing to its unique microstructure and the self-doped phosphorus of Manila grass. Therefore, the porous hive-like Co 3 O 4 @C composite can better achieve as an electrode material through an easy and eco-friendly process based on biocarbon for the energy storage devices in the future. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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