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Article

Ultrafast Microwave-Assisted Synthesis of Porous NiCo Layered Double Hydroxide Nanospheres for High-Performance Supercapacitors

by
Xing Yang
1,
Qing He
1,
Longbo Hu
1,
Wanglong Wang
2,
Wenmiao Chen
2,
Xing Fang
1,* and
Jun Liu
1,*
1
Key Laboratory of Air-Driven Equipment Technology of Zhejiang Province, Quzhou University, Quzhou 324000, China
2
Department of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310058, China
*
Authors to whom correspondence should be addressed.
Molecules 2024, 29(11), 2546; https://doi.org/10.3390/molecules29112546
Submission received: 28 April 2024 / Revised: 22 May 2024 / Accepted: 27 May 2024 / Published: 28 May 2024
(This article belongs to the Section Electrochemistry)
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Abstract

Currently, new clean energy storage technology must be effective, affordable, and ecologically friendly so as to meet the diverse and sustainable needs of the energy supply. In this work, NiCo-LDH containing intercalated EG was successfully prepared within 210 s using an ultrafast microwave radiation technique. Subsequently, a series of characterization and systematic electrochemical tests were conducted to analyze the composition, structure, and energy storage mechanism of the NiCo-LDH material. The Ni:Co ratio of 5:5 results in the highest capacitance value of 2156 F/g at 1 A/g and an outstanding rate performance of 86.8% capacity retention rate at 10 A/g. The results demonstrated that the unique porous structure of NiCo-LDH and large layer spacing were conducive to more electrochemical reactions. Additionally, an electrochemical test was carried out on the NiCo-LDH as a hybrid supercapacitor electrode material, with NiCo-LDH-5:5 serving as the positive electrode and activated carbon as the negative electrode, the asymmetric supercapacitor can achieve a maximum energy density of 82.5 Wh kg−1 and power density of 8000 W kg−1. The NiCo-LDH-5:5//AC hybrid supercapacitors own 81.5% cycle stability and 100% coulombic efficiency after 6000 cycles at 10 A/g.
Keywords: microwave; NiCo-LDH; supercapacitor; ethylene glycol microwave; NiCo-LDH; supercapacitor; ethylene glycol

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MDPI and ACS Style

Yang, X.; He, Q.; Hu, L.; Wang, W.; Chen, W.; Fang, X.; Liu, J. Ultrafast Microwave-Assisted Synthesis of Porous NiCo Layered Double Hydroxide Nanospheres for High-Performance Supercapacitors. Molecules 2024, 29, 2546. https://doi.org/10.3390/molecules29112546

AMA Style

Yang X, He Q, Hu L, Wang W, Chen W, Fang X, Liu J. Ultrafast Microwave-Assisted Synthesis of Porous NiCo Layered Double Hydroxide Nanospheres for High-Performance Supercapacitors. Molecules. 2024; 29(11):2546. https://doi.org/10.3390/molecules29112546

Chicago/Turabian Style

Yang, Xing, Qing He, Longbo Hu, Wanglong Wang, Wenmiao Chen, Xing Fang, and Jun Liu. 2024. "Ultrafast Microwave-Assisted Synthesis of Porous NiCo Layered Double Hydroxide Nanospheres for High-Performance Supercapacitors" Molecules 29, no. 11: 2546. https://doi.org/10.3390/molecules29112546

APA Style

Yang, X., He, Q., Hu, L., Wang, W., Chen, W., Fang, X., & Liu, J. (2024). Ultrafast Microwave-Assisted Synthesis of Porous NiCo Layered Double Hydroxide Nanospheres for High-Performance Supercapacitors. Molecules, 29(11), 2546. https://doi.org/10.3390/molecules29112546

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