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Graphene-doped RuO2-based porous electrode and preparation method thereof

A graphene, porous electrode technology, applied in the field of graphene-doped RuO2-based porous electrodes and their preparation, can solve problems such as collapse, volume expansion, poor conductivity, etc. Effect

Active Publication Date: 2017-10-20
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, adding non-noble metal oxides can effectively improve the RuO 2 Capacitive properties of oxide-based materials, but poor conductivity, and serious volume expansion during charge and discharge, resulting in electrode pulverization and collapse

Method used

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  • Graphene-doped RuO2-based porous electrode and preparation method thereof

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specific Embodiment 1

[0016] The TA2 titanium plate after sandblasting is used as the substrate, degreased, etched, rinsed with deionized water, and put into ethanol solution for later use. According to Ru loading 0.6mg / cm 2 Take ruthenium trichloride dissolved in absolute ethanol and ultrasonically shake to dissolve completely. According to 0.6g / cm 2 Weigh graphene and add to 0.5ml / cm 2 Concentrated hydrochloric acid acidifies the graphene, mixes the acidified graphene into the ruthenium trichloride solution, and continues ultrasonic oscillation. Take the precursor CeCl of non-noble metal oxide 3 According to ruthenium trichloride: CeCl 3 The molar ratio of metal ions is 3:1 dissolved in absolute ethanol. The above solution was ultrasonically oscillated and mixed until completely dissolved to become a coating solution with a metal ion concentration of 30wt%. Brush the coating solution on the titanium plate, dry it under an infrared lamp, place it in a muffle furnace at 300°C for pre-oxidatio...

specific Embodiment 2

[0017] According to Ru loading 0.6mg / cm 2 Take ruthenium trichloride dissolved in absolute ethanol and ultrasonically shake to dissolve completely. According to 0.6g / cm 2 Weigh graphene and add to 0.5ml / cm 2 Concentrated hydrochloric acid acidifies the graphene, mixes the acidified graphene into the ruthenium trichloride solution, and continues ultrasonic oscillation. Take the precursor CeCl of non-noble metal oxide 3 According to ruthenium trichloride: CeCl 3 The molar ratio of metal ions is 3:1 dissolved in absolute ethanol. The above solution was ultrasonically oscillated and mixed until completely dissolved to become a coating solution with a metal ion concentration of 30wt%. Brush the coating liquid on the foam Ni board, dry it under the infrared lamp, place it in a muffle furnace at 300°C for pre-oxidation for 10 minutes, repeat the above coating process after air cooling, until all the coating liquid is used up, and finally heat-treat at 340°C 1~6h, the porous met...

specific Embodiment 3

[0018] The TA2 titanium plate after sandblasting is used as the substrate, degreased, etched, rinsed with deionized water, and put into ethanol solution for later use. According to Ru loading 0.6mg / cm 2 Take ruthenium trichloride dissolved in absolute ethanol and ultrasonically shake to dissolve completely. According to 0.6g / cm 2 Weigh graphene and add to 0.5ml / cm 2 Concentrated hydrochloric acid acidifies the graphene, mixes the acidified graphene into the ruthenium trichloride solution, and continues ultrasonic oscillation. Take the precursor SnCl of non-noble metal oxide 2 According to ruthenium trichloride: SnCl 2 The molar ratio of metal ions is 3:1 dissolved in absolute ethanol. The above solution was ultrasonically oscillated and mixed until completely dissolved to become a coating solution with a metal ion concentration of 30wt%. Brush the coating solution on the Ti plate, dry it under an infrared lamp, place it in a muffle furnace at 300°C for pre-oxidation for ...

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Abstract

The invention belongs to the technical field of electrode materials and particularly relates to a graphene-doped RuO2-based porous electrode and a preparation method thereof. The preparation method comprises that ruthenium trichloride and graphene are loaded and then loaded product is compounded with a non-precious metal oxide so that a compound electrode material is prepared. Through combination of the high conductivity and high specific surface area of graphene, the high conductivity and activity of a precious metal oxide RuO2 and a unique outer electron structure of the non-precious metal oxide material, a novel porous metal oxide / graphene composite electrode having high specific capacitance is prepared.

Description

technical field [0001] The invention belongs to the technical field of electrode materials, in particular to a graphene-doped RuO 2 Based porous electrode and its preparation method. Background technique [0002] RuO 2 It is the most active noble metal oxide, with RuO 2 Adding non-noble metal oxides such as TiO to the active material 2 , SnO 2 、Co 3 o 4 、Ni 2 o 5 One or several of them become a typical chlorine analysis electrode, and when the mixed oxide is in a microcrystalline state, it has good specific capacitance characteristics. Therefore, adding non-noble metal oxides to improve their electrochemical performance and reduce costs is the focus of research. However, adding non-noble metal oxides can effectively improve the RuO 2 The capacitive performance of the oxide-based material is poor, but the conductivity is poor, and the volume expansion is serious during the charge and discharge process, resulting in electrode pulverization and collapse. The charge c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/02H01M4/04H01M4/48H01M4/583
CPCH01M4/02H01M4/0402H01M4/48H01M4/583H01M2004/021Y02E60/10
Inventor 邵艳群何建张帅黄善锋王艳鸿
Owner FUZHOU UNIV