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Preparation of Lignin Carbon/Zinc Oxide Electrode Material and Its Application in Supercapacitors

by 1,2, 1,2, 1,2, 1,2,* and 1,2,*
1
School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China
2
Key Laboratory of Green Chemical Technology of College of Heilongjiang Province, Harbin 150040, China
*
Authors to whom correspondence should be addressed.
Academic Editor: César Augusto Correia de Sequeira
Molecules 2021, 26(12), 3554; https://doi.org/10.3390/molecules26123554
Received: 8 April 2021 / Revised: 26 May 2021 / Accepted: 4 June 2021 / Published: 10 June 2021
In this paper, carbon/zinc oxide (LC/ZnO) composites were successfully synthesized and characterized by X-ray powder diffraction, field emission scanning electron microscopy, Fourier transform infrared spectroscopy, Raman, thermogravimetry, and N2 adsorption–desorption, and tested by electrochemical performance. Studies have shown that the morphology of LC/ZnO composites is that lignin pellets are embedded in ZnO microplates. The lignin carbon in the composites mainly exists in an amorphous structure, and the specific surface area and pore channels of metal oxides are increased by the presence of lignin carbon. The electrochemical performance test shows that the carbonization temperature of LC/ZnO with the highest specific capacitance is 550 °C, and the capacitance retention rate reaches 96.74% after 1000 cycles of testing, indicating that the composite material has good cycle stability. Compared with the control group, it is found that the specific capacitance of LC/ZnO-550 °C is 2.3 times and 1.8 times that of ZnO-550 °C and LC-550 °C, respectively. This shows that during the electrochemical test, the lignin carbon and the metal oxide promote each other and act synergistically. In addition, the composite material exhibits the characteristics of a pseudo-capacitance capacitor, indicating that the redox reaction occurred in the electrochemical performance test. View Full-Text
Keywords: lignin carbon; ZnO; composite material; supercapacitors lignin carbon; ZnO; composite material; supercapacitors
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MDPI and ACS Style

Guo, G.; Zhou, Z.; Li, J.; Yan, H.; Li, F. Preparation of Lignin Carbon/Zinc Oxide Electrode Material and Its Application in Supercapacitors. Molecules 2021, 26, 3554. https://doi.org/10.3390/molecules26123554

AMA Style

Guo G, Zhou Z, Li J, Yan H, Li F. Preparation of Lignin Carbon/Zinc Oxide Electrode Material and Its Application in Supercapacitors. Molecules. 2021; 26(12):3554. https://doi.org/10.3390/molecules26123554

Chicago/Turabian Style

Guo, Gaijuan; Zhou, Zijing; Li, Jinda; Yan, Hong; Li, Fen. 2021. "Preparation of Lignin Carbon/Zinc Oxide Electrode Material and Its Application in Supercapacitors" Molecules 26, no. 12: 3554. https://doi.org/10.3390/molecules26123554

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