Work

Synthesis of CoO-anchored nickel-cobalt layered hydroxide nanowire arrays via low-cobalt hydrothermal method for high-performance supercapacitors

Year: 2025

Type: article

Abstract: To address the challenges of reduced ion penetration channels, low active material utilization, and hindered charge transport in carbon fiber-supported nickel-cobalt layered double hydroxide (NiCo-LDH) with high mass loading (>5 mg cm −2 ), this study optimized the morphological structure of NiCo-LDH by regulating nickel/cobalt feeding ratios, achieving enhanced electrochemical performance with reduced cobalt content. The introduction of cobalt oxide (CoO) nanobridges not only provided effective anchoring sites for NiCo-LDH growth but also improved electron transport pathways. The as-prepared NiCo-10 composite exhibited a high specific capacitance of 2354 F g⁻¹ at 1 A g⁻¹ . When assembled into an asymmetric supercapacitor , the device delivered an energy density of 55.8 Wh kg⁻¹ at 1070.7 W kg⁻¹ power density, with 91.39 % capacitance retention after 10,000 charge-discharge cycles. These results demonstrate the superior electrochemical performance, rate capability, and cycling stability of the NiCo-10 composite, highlighting its potential for high-capacity supercapacitor applications.

Source: Journal of Alloys and Compounds

DOI: 10.1016/j.jallcom.2025.179517

Authors: Jinyu Wei, Chuanzheng Zhang, Xiaoqin Yang, Jia Jia, Zhihong Qin

Institution: China University of Mining and Technology

Language: English

Topic: Supercapacitor Materials and Fabrication

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $3,660