A novel nickel and cobalt-layered double Hydroxide@Nickel borate with three-dimensional flower-like structure as electrode material for high-performance hybrid supercapacitor
Journal of Power Sources, ISSN: 0378-7753, Vol: 629, Page: 235910
2025
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Article Description
It is crucial for enhancing electrochemical properties of existing supercapacitors to design and develope electrode materials with unique structures. Herein, a novel design of nickel and cobalt-layered double hydroxide@nickel borate (NiCo-LDH@Ni(BO 2 ) 2 ) with three-dimensional flower-like structure as the positive by a two-step method for asymmetric supercapacitor is reported. The synthesis strategy of the unique structure formed by stacking two-dimensional lamels provides efficient mesoporous networks, ion diffusion channels for quicker electron transfer, and enhances more active sites for nickel and cobalt-layered double hydroxide (NiCo-LDH) and nickel borate (Ni(BO 2 ) 2 ). The specific electric capacity of optimized NiCo-LDH@Ni(BO 2 ) 2 composite achieves 1373 F g −1 at 0.5 A g −1 in a three-electrode system. The self-assembled hybrid supercapacitors (HSC) NiCo-LDH@Ni(BO 2 ) 2 //AC owns the an maximum energy density of 46.5 Wh·kg −1 at the power density 850 W kg −1. Meanwhile, it displays significant cycle stability with an impressive capacitance retention rate of 84.9 % over 5000 charging/discharging cycles. In the end, two serial-connected HSC devices can light up (Light Emitting Diodes) LEDs with difference color (red, yellow and green). Hence, the present research can match the demand of high-property electrode materials for energy storing equipment in the future.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0378775324018627; http://dx.doi.org/10.1016/j.jpowsour.2024.235910; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85210605321&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0378775324018627; https://dx.doi.org/10.1016/j.jpowsour.2024.235910
Elsevier BV
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