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Enhanced capacitive performance by improving the graphitized structure in carbon aerogel microspheres.

ABSTRACT: Herein, good electrical conductivity and high specific surface area carbon aerogel (CA) microspheres were synthesized by a facile and economical route using a high temperature carbonization and CO₂ activation method. The electroconductive graphitized structure of the CA microspheres could be easily improved by increasing the carbonization temperature. Then the CA microspheres were activated with CO₂ to increase the specific surface area of the electrode material for electric double layer capacitors (EDLC). The sample carbonized at 1500 °C for 0.5 h and CO₂ activated at 950 °C for 8 h showed an acceptable specific surface area and excellent cycle performance and rate capability for EDLC: 98% of the initial value of the capacitance was retained after 10 000 cycles, a specific capacitance of 121 F g^-1 at 0.2 A g^-1 and 101 F g^-1 at 2 A g^-1.

SUBMITTER: Liu X

PROVIDER: S-EPMC9054511 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature

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Enhanced capacitive performance by improving the graphitized structure in carbon aerogel microspheres.

Liu Xichuan X Yuan Lei L Zhong Minglong M Ni Shuang S Yang Fan F Fu Zhibing Z Xu Xibin X Wang Chaoyang C Tang Yongjian Y

RSC advances 20200610 37

Herein, good electrical conductivity and high specific surface area carbon aerogel (CA) microspheres were synthesized by a facile and economical route using a high temperature carbonization and CO<sub>2</sub> activation method. The electroconductive graphitized structure of the CA microspheres could be easily improved by increasing the carbonization temperature. Then the CA microspheres were activated with CO<sub>2</sub> to increase the specific surface area of the electrode material for electri ...[more]

PMID: 35516609

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