Superstructured NiMoO4@CoMoO4 core-shell nanofibers for supercapacitors with ultrahigh areal capacitance

Authors

Liang Chang, Michigan Technological University
Shaoqin Chen, Michigan Technological UniversityFollow
Yuhuan Fei, Michigan Technological UniversityFollow
Dario J. Stacchiola, Brookhaven National Laboratory
Yun Hang Hu, Michigan Technological UniversityFollow

Document Type

Article

Publication Date

3-13-2023

Department

Department of Materials Science and Engineering

Abstract

High areal capacitance for a practical supercapacitor electrode requires both large mass loading and high utilization efficiency of electroactive materials, which presents a great challenge. Herein, we demonstrated the unprecedented synthesis of superstructured NiMoO4@CoMoO4 core-shell nanofiber arrays (NFAs) on a Mo-transition-layer-modified nickel foam (NF) current collector as a new material, achieving the synergistic combination of highly conductive CoMoO4 and electrochemical active NiMoO4. Moreover, this superstructured material exhibited a large gravimetric capacitance of 1,282.2 F/g in 2 M KOH with a mass loading of 7.8 mg/cm2, leading to an ultrahigh areal capacitance of 10.0 F/cm2 that is larger than any reported values of CoMoO4 and NiMoO4 electrodes. This work provides a strategic insight for rational design of electrodes with high areal capacitances for supercapacitors.

Publication Title

Proceedings of the National Academy of Sciences of the United States of America

Recommended Citation

Chang, L., Chen, S., Fei, Y., Stacchiola, D., & Hu, Y. (2023). Superstructured NiMoO4@CoMoO4 core-shell nanofibers for supercapacitors with ultrahigh areal capacitance. Proceedings of the National Academy of Sciences of the United States of America, 120(12). http://doi.org/10.1073/pnas.2219950120
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