학술논문
Superstructured NiMoO 4 @CoMoO 4 core-shell nanofibers for supercapacitors with ultrahigh areal capacitance.
Document Type
Academic Journal
Author
Chang L; Department of Materials Science and Engineering, Michigan Technological University, Houghton, MI 49931-1295.; Chen S; Department of Materials Science and Engineering, Michigan Technological University, Houghton, MI 49931-1295.; Fei Y; Department of Materials Science and Engineering, Michigan Technological University, Houghton, MI 49931-1295.; Stacchiola DJ; Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973.; Hu YH; Department of Materials Science and Engineering, Michigan Technological University, Houghton, MI 49931-1295.
Source
Publisher: National Academy of Sciences Country of Publication: United States NLM ID: 7505876 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1091-6490 (Electronic) Linking ISSN: 00278424 NLM ISO Abbreviation: Proc Natl Acad Sci U S A Subsets: PubMed not MEDLINE; MEDLINE
Subject
Language
English
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 NiMoO 4 @CoMoO 4 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 CoMoO 4 and electrochemical active NiMoO 4 . 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/cm 2 , leading to an ultrahigh areal capacitance of 10.0 F/cm 2 that is larger than any reported values of CoMoO 4 and NiMoO 4 electrodes. This work provides a strategic insight for rational design of electrodes with high areal capacitances for supercapacitors.