| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Multicomponent Transition Metal Oxides with Heterogeneous Structures in Energy Storage of Supercapacitors |
| CHEN Yue, XU Fen*, SUN Lixian*, YU Chuyu, FENG Yulin, LI Rongjiang, XU Rudan, DU Maozhan, HU Xingyu
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| School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, Guangxi, China |
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Abstract To increase the energy density of metal oxide NiMoO4/CoMoO4, a non-ionic surfactant polyvinylpyrrolidone (PVP) is used to modify the morphology of NiMoO4/CoMoO4-PVP to obtain nano-flower-like NiMoO4/CoMoO4-PVP formed by interlaced thin and curved nanosheets. Then, the NiMoO4/CoMoO4-PVP is used as the supporting material and potassium ferricyanide as the raw material to deposit Prussian blue analogue (PBAs) on the surface of NiMoO4/CoMoO4-PVP by solvent co-precipitation method. The results demonstrate that PBAs can provide pseudocapacitance and stable framework structure, as well as the heterostructure formed by PBAs and NiMoO4/CoMoO4-PVP can accelerate the diffusion rate of electrolyte ions and induce the exposure of more active sites for electrochemical energy storage. The microstructure characterization and the electrochemical performance reveal that the optimal aging time of the deposition reaction is 24 hours, and the NiMoO4/CoMoO4-PVP@PBAs-24 electrode exhibits good capacitance performance (1 313 F·g-1 at 1 A·g-1). Additionally, the NiMoO4/CoMoO4-PVP@PBAs-24//CGL asymmetric capacitor assembled with biological porous carbon CGL achieves 79.8% capacitance retention and 100% high Coulomb efficiency after 10 000 cycles. At the power density of 393 W·kg-1, the maximum energy density is 42.17 Wh·kg-1, indicating that NiMoO4/CoMoO4-PVP@PBAs-24 has good electrochemical performance.
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Published: 25 April 2026
Online: 2026-05-06
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