Enhancing the Kinetic Process in Biphasic Crystalline NiWO4 /Amorphous Co-B Electrode Materials toward Energy Storage with Ultrahigh Rate Performance

Jing-Feng Hou; Jian-Fei Gao; Ling-Bin Kong

doi:10.1002/asia.202101048

Enhancing the Kinetic Process in Biphasic Crystalline NiWO₄ /Amorphous Co-B Electrode Materials toward Energy Storage with Ultrahigh Rate Performance

Chem Asian J. 2021 Dec 13;16(24):4130-4136. doi: 10.1002/asia.202101048. Epub 2021 Oct 26.

Authors

Jing-Feng Hou¹, Jian-Fei Gao¹, Ling-Bin Kong^{1

2}

Affiliations

¹ State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou, 730050, P. R. China.
² School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, P. R. China.

PMID: 34699116
DOI: 10.1002/asia.202101048

Abstract

Here, we report a two-phase crystalline NiWO₄ /amorphous Co-B nanocomposite as an electrode material for supercapacitors, which is effectively synthesized via a simple hydrothermal method and chemical precipitation method. The obtained NiWO₄ /Co-B exhibits crystal-amorphous contact, which makes it have more active sites than other crystalline-crystalline phase boundaries, thereby enhancing electron transport. The NiWO₄ /Co-B electrode with the best mass ratio of crystalline and amorphous exhibits a great specific capacitance and excellent cycle durability. Compared to individual Co-B and NiWO₄ , it also shows enhanced rate capability Besides, NiWO₄ /Co-B/activated carbon supercapacitor device can provide a good specific capacitance and a maximum energy density of 10.92 Wh kg^-1 at 200 W kg^-1 . This work provides new insights to develop novel electrode materials for energy storage and conversion.

Keywords: Biphasic structure; Crystalline-amorphous contacts; Energy storage; Supercapacitors.

Abstract

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