Carbon nanotube-mediated Ni3(PO4)2/NiCo2O4 hybrids for advanced energy storage in asymmetric supercapacitors

IF 3.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences Pub Date : 2025-02-01 DOI:10.1016/j.solidstatesciences.2025.107834

Lei Yuan, Zhenyu Zhu, Dongkun Fan, Jiarui Xun, Jie Liu, Ku Jiang, Liwei Zhang, Na Xin

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Abstract

A simple hydrothermal method was proposed to synthesize a high contact area Ni₃(PO₄)₂/NiCo₂O₄@CNTs composite material for asymmetric supercapacitors. By utilizing the advantages of both phosphates and bimetallic oxides and their synergistic effect after compounding, a hierarchical structure is formed, thereby improving the overall electrochemical performance of the composite material. The capacitance of this electrode material is 1563 F g⁻¹ (1 A g⁻¹). The capacitance of the asymmetric supercapacitor assembled positive electrode Ni₃(PO₄)₂/NiCo₂O₄@CNTs and negative electrode activated carbon (AC) as the negative electrode is 102.2 F⁻¹ at 1 A g⁻¹. The capacity retention rate is 83.6 % after 10,000 charge and discharge cycles. In addition, when the power density is 800 W kg⁻¹, its specific energy is as high as 36.3 Wh kg⁻¹. It proves that the composite materials prepared by this strategy have the potential application as electrode materials for capacitors.

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来源期刊

Solid State Sciences 化学-无机化学与核化学

CiteScore

6.60

自引率

2.90%

发文量

214

审稿时长

27 days

期刊介绍： Solid State Sciences is the journal for researchers from the broad solid state chemistry and physics community. It publishes key articles on all aspects of solid state synthesis, structure-property relationships, theory and functionalities, in relation with experiments. Key topics for stand-alone papers and special issues: -Novel ways of synthesis, inorganic functional materials, including porous and glassy materials, hybrid organic-inorganic compounds and nanomaterials -Physical properties, emphasizing but not limited to the electrical, magnetical and optical features -Materials related to information technology and energy and environmental sciences. The journal publishes feature articles from experts in the field upon invitation. Solid State Sciences - your gateway to energy-related materials.