Manganese dioxide/carbon composite electrode material and preparation method thereof, and super capacitor

A technology of manganese dioxide and electrode materials, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of Faraday capacitor charges that cannot be quickly charged and discharged, effective capacitance, poor conductivity, etc., and achieve good electrochemical cycle stability Performance, Effect of High Specific Capacitance

Active Publication Date: 2015-11-11
TSINGHUA UNIV
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Problems solved by technology

However, due to the poor conductivity of the manganese dioxide pseudocapacitive material, the Faraday capacitance charge cannot be quickly charged and discharged to form an effective capacitance, so that the actual measured δ-MnO 2 The specific capacitance only reaches 236F / g

Method used

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  • Manganese dioxide/carbon composite electrode material and preparation method thereof, and super capacitor
  • Manganese dioxide/carbon composite electrode material and preparation method thereof, and super capacitor
  • Manganese dioxide/carbon composite electrode material and preparation method thereof, and super capacitor

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Embodiment Construction

[0020] The manganese dioxide / carbon composite electrode material provided by the present invention, its preparation method and the supercapacitor using the electrode material will be further described in detail below in conjunction with the accompanying drawings and specific examples.

[0021] An embodiment of the present invention provides a manganese dioxide / carbon composite electrode material for a supercapacitor, the manganese dioxide / carbon composite electrode material is a core-shell structure, including carbon black (carbonblack) particles and a plurality of manganese dioxide nanometers piece. The particle size of the carbon black particles is 3nm-8nm. The plurality of manganese dioxide nanosheets grow on the surface of the carbon black particle in situ and extend outward from the surface of the carbon black particle. The plurality of manganese dioxide nanosheets are interconnected to form a coral-like porous shell, and the carbon black particles are coated in the poro...

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Abstract

The invention provides a manganese dioxide/carbon composite electrode material. The manganese dioxide/carbon composite electrode material is a core-shell structure and comprises carbon black particles, and a plurality of manganese dioxide nanosheets. The grain diameter of the carbon black particle is 3 to 8 nm. The manganese dioxide nanosheets are extended out from the surface of the carbon black particle and are connected with each other to form a coralloid porous shell to coat the carbon black particles. The invention further provides a preparation method of the manganese dioxide/carbon composite electrode material and a super capacitor.

Description

technical field [0001] The invention relates to a manganese dioxide / carbon composite electrode material, a preparation method thereof and a supercapacitor using the electrode material. Background technique [0002] As an energy storage device with high energy density, high power density and high cycle stability, supercapacitor has attracted more and more attention. The performance of supercapacitors depends on the electrode material, which can be divided into two categories according to the energy storage mechanism: one is the electric double layer material that uses the electric double layer mechanism to store energy, such as activated carbon, activated carbon fiber, carbon nanotubes, carbon gel, etc. This material relies on electrostatic adsorption of electrolyte ions to achieve the purpose of energy storage; the second is a pseudocapacitive material that uses redox reactions between electrode materials and electrolyte ions to store energy, such as ruthenium oxide, vanadiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/42H01G11/46H01G11/86
CPCY02E60/13
Inventor 安军伟徐盛明
Owner TSINGHUA UNIV
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