Poor electrical conductivity and mechanical instability are two major obstacles to realizing high performance of MnO2 as pseudocapacitor material. The construction of unique hierarchical core–shell nanostructures, therefore, plays an important role in the efficient enhancement of the rate capacity and the stability of this material. We herein report the fabrication of a hierarchical α-MnO2 nanowires@ultrathin δ-MnO2 nanosheets core–shell nanostructure by adopting a facile and practical solution-phase technique. The novel hierarchical nanostructures are composed of ultrathin δ-MnO2 nanosheets with a few atomic layers growing well on the surface of the ultralong α-MnO2 nanowires. The first specific capacitance of hierarchical core–shell nanostructure reached 153.8 F g–1 at the discharge current density of as high as 20 A g–1, and the cycling stability is retained at 98.1% after 10 000 charge–discharge cycles, higher than those in the literature. The excellent rate capacity and stability of the hierarchical ...

Construction of Hierarchical α-MnO2 Nanowires@Ultrathin δ-MnO2 Nanosheets Core–Shell Nanostructure with Excellent Cycling Stability for High-Power Asymmetric Supercapacitor Electrodes

Recent research of core–shell structured composites with NiCo2O4 as scaffolds for electrochemical capacitors

Hierarchical 3D NiCo2O4@ZnWO4 core-shell structures as binder-free electrodes for all-solid-state supercapacitors

Self-grown MnO2 nanosheets on carbon fiber paper as high-performance supercapacitors electrodes

3-D honeycomb NiCo 2 S 4 with high electrochemical performance used for supercapacitor electrodes

NiCo2O4 / MnO2 heterostructured nanosheet: influence of preparation conditions on its electrochemical properties

The present invention discloses a method for preparing an electrode material molybdate for a super capacitor and the application thereof. The method comprises the steps of dissolving cobalt salt or nickel salt and sodium molybdate in a solution formed by water and oleylamine, carrying out hydrothermal reaction, carrying out centrifugation, washing and drying processing, carrying out calcinations under an inert atmosphere, and carrying out grinding to obtain powder to obtain a carbon-coated molybdate super capacitor electrode material. The carbon-coated cobalt molybdate or nickel molybdate electrode material prepared by the preparation method is applied to the super capacitor, and the method has the advantages of simple synthesis process, good repeated performance and mass production.

Method for preparing electrode material molybdate for super capacitor and application thereof

The invention discloses a preparation method for an electrode material used for a supercapacitor and the application of electrode material. The preparation method for the electrode material comprises the steps that LiCoO2 and sodium hypophosphite are put in a tube furnace proportionally, the LiCoO2 and the sodium hypophosphite are roasted for 1 to 2 hours under an inert atmosphere and with the temperature ranging from 300 DEG C to 500 DEG C, and the electrode material is acquired when the LiCoO2 and the sodium hypophosphite are cooled; phosphor doping LiCoO2 composite electrode material prepared through the preparation method is applied to the supercapacitor. The preparation method for the electrode material has the advantages that the raw material is cheap and easy to get, the synthetic process is simple and easy to realize, the product quality is stable, and the reception performance of the technology is good; phosphor doping LiCoO2 composite electrode material prepared through the preparation method has an excellent supercapacitor performance.

Li Baiye

Papers

NiCo2O4 / MnO2 heterostructured nanosheet: influence of preparation conditions on its electrochemical properties

Method for preparing electrode material molybdate for super capacitor and application thereof

Preparation method for electrode material used for supercapacitor and application of electrode material