In:
Science of Advanced Materials, American Scientific Publishers, Vol. 16, No. 4 ( 2024-04-01), p. 468-474
Abstract:
Bamboo activated carbon (BAC) has excellent specific capacitance among electrode materials, but the important challenges of it are the insufficient energy density and power density currently. Herein, a facile method for the preparation of strong performance MnO/Mn 3 O 4 /C composites by putting BAC into KMnO 4 solution and annealing in tube furnace. Interestingly, by controlling the reaction time and substrate concentration of BAC and KMnO 4 , it is possible to control not only the amount of MnO x doping, but also to change the ratio between MnO x , and thereby the electrochemical properties of MnO x /C was improved. Since BAC had a bilayer capacitance and manganese oxides could bring pseudo-capacitance to the materials, when the experimental conditions were reaction time and concentration of 20 min and 20 g/L respectively, the Mn content of the composite was 19.91% and it also had a excellent performance with 422.8 F/g of specific capacitance. In addition, the power and energy density were 30.76 Wh/kg and 3460 W/kg, respectively. It provided a basis for effectively improving the electrochemical performance of carbon-based electrode materials.
Type of Medium:
Online Resource
ISSN:
1947-2935
DOI:
10.1166/sam.2024.4654
Language:
English
Publisher:
American Scientific Publishers
Publication Date:
2024
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