Abstract
Ternary spinel CuCo2O4 nanostructure clenches great potential as high-performance electrode material for next-generation energy storage systems because of its higher electrical conductivity and electrochemical activity. Carbon free and binder free 3D flower-like CuCo2O4 structure are grown on nickel foam (NF) via a facile hydrothermal synthesis method followed by annealing. The obtained CuCo2O4/NF is directly used as electrode for lithium ion batteries (LIBs) and supercapacitors (SCs) application. The electrochemical study of 3D flower-like CuCo2O4 as an electrode for LIB and SC shows highly mesoporous unique architecture plays important role in achieving high capacity/capacitance with superior cycle life. The high surface area and mesoporous nature not only offer sufficient reaction sites, but also can accelerate the liquid electrolyte to penetrate electrode and the ions to reach the reacting sites. In outcome, it exhibits highest capacity of 1160 mA h g−1 after 200 cycles when used as an anode for LIB and specific capacitance of 1002 F g−1 after 3000 cycles. The superior electrochemical of synthesized material is attributed to direct contact of electrode active material with good intrinsic electrical conductivity to the underneath conductive NF substrate builds up an express path for fast ion and electron transfer.
Highlights
The growing demands of electrical storage devices for electric vehicles(EV), hybrid electric vehicles(HEV) and portable electronic devices, existing great challenges towards the enhancement of electrochemical performance[1,2]
In present study hierarchical 3D flower-like CuCo2O4 spinel oxide directly grown on Ni foam (NF) by using hydrothermal method followed by annealing in air
At the initial temperature, slow hydrolysis of urea take place to release ammonia and OH− ↔ Cu (OH)− ion in the reaction medium which further coordinates with metal ions leading to the formation of a thin seed layer of Cu, Co-hydroxide on the Ni substrate
Summary
The growing demands of electrical storage devices for electric vehicles(EV), hybrid electric vehicles(HEV) and portable electronic devices, existing great challenges towards the enhancement of electrochemical performance[1,2]. Transition metal oxides (TMOs) such as NiO16,17, Fe2O318,19 and Co3O420 oxides have been investigated intensively as advanced electrode materials for energy storage application because they possess multiple oxidation states which accelerates redox reactions. Most of these metal oxides often suffer poor cycling stability and rate performance due to their intrinsic properties, including low electrical conductivity and poor mechanical stability, which hinders the electrochemical reactions[21]. Hierarchical porous 3D nanostructures deposited directly on conductive metal substrates containing large surface areas are highly desirable for efficient energy storage and conversion due to their short transport pathways for electrons and ions[30,31]. The superior electrochemical performance of hierarchical 3D flower-like CuCo2O4/NF has been ascribed to the 3D mesoporous structure with high surface area
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
