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Vanadium oxide/carbon/clay composite positive electrode material as well as preparation method and application thereof in aqueous battery

A composite positive electrode material and vanadium oxide technology, which is applied in the field of electrochemistry, can solve the problems of insufficient electronic conductivity and poor ion diffusivity, and achieve the effects of promoting diffusion and transportation, low preparation cost, and good environmental performance

Active Publication Date: 2020-01-17
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention proposes a vanadium oxide / carbon / clay composite positive electrode material for the poor ion diffusivity and insufficient electronic conductivity of the existing aqueous battery positive electrode material

Method used

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  • Vanadium oxide/carbon/clay composite positive electrode material as well as preparation method and application thereof in aqueous battery
  • Vanadium oxide/carbon/clay composite positive electrode material as well as preparation method and application thereof in aqueous battery
  • Vanadium oxide/carbon/clay composite positive electrode material as well as preparation method and application thereof in aqueous battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] (1) Pretreatment of sepiolite: Treat raw sepiolite with 4mol / L hydrochloric acid at 85°C for 8 hours (the ratio of raw sepiolite to hydrochloric acid is 1g:50mL), and dry at 80°C for 24h , ground to a particle size of 500 mesh for later use, the structure of sepiolite has changed before and after treatment, and its main component is amorphous SiO 2 ..

[0056] (2) Preparation of hydrophilic vanadium oxide / carbon nanotube / sepiolite aqueous battery composite positive electrode material: first, V 2 o 5 Powder: H 2 o 2 Solution=1g:50mL ratio, add H 2 o 2 Solution, under the temperature condition of 5 ℃, ultrasonic, stirring and mixing evenly, ultrasonic 20min, ultrasonic power is 100W, stirring rate is 500r / min, stirring time is 20min; then slowly add carbon nanotube powder, sea foam stone powder (V 2 o 5 The mass ratio of powder, carbon nanotube powder, and sepiolite powder is 50:20:30) ultrasonication, stirring, mixing and stirring evenly, the stirring rate is 600...

Embodiment 2

[0061] (1) Pretreatment of sepiolite: Treat raw sepiolite with 4mol / L hydrochloric acid at 85°C for 8 hours (the ratio of raw sepiolite to hydrochloric acid is 1g:50mL), and dry at 80°C for 24h , Grind to a particle size of 500 mesh for later use.

[0062] (2) Preparation of hydrophilic vanadium oxide / carbon nanotube / sepiolite aqueous battery composite positive electrode material: first, in terms of mass percentage, take V 2 o 5 powder, with V 2 o 5 Powder: H 2 o 2 Solution=1g:50mL ratio, add H 2 o 2 Solution, under the temperature condition of 5 ℃, ultrasonic, stirring and mixing evenly, ultrasonic 20min, ultrasonic power is 100W, stirring rate is 500r / min, stirring time is 20min; then slowly add carbon nanotube powder, sea foam stone powder (V 2 o 5 The mass ratio of powder, carbon nanotube powder and sepiolite powder is 65:25:10) ultrasonication, stirring, mixing and stirring evenly, the stirring speed is 600r / min, and the stirring time is 40min; then pour the mixe...

Embodiment 3

[0067] (1) Pretreatment of sepiolite: Treat raw sepiolite with 4mol / L hydrochloric acid at 85°C for 8 hours (the ratio of raw sepiolite to hydrochloric acid is 1g:50mL), and dry at 80°C for 24h , Grind to a particle size of 500 mesh for later use.

[0068] (2) Preparation of hydrophilic vanadium oxide / carbon nanotube / sepiolite aqueous battery composite positive electrode material: first, in terms of mass percentage, take V 2 o 5 powder, with V 2 o 5 Powder: H 2 o 2 Solution=1g:50mL ratio, add H 2 o 2 Solution, under the temperature condition of 5 ℃, ultrasonic, stirring and mixing evenly, ultrasonic 20min, ultrasonic power is 100W, stirring rate is 500r / min, stirring time is 20min; then slowly add carbon nanotube powder, sea foam stone powder (V 2 o 5 The mass ratio of powder, carbon nanotube powder, and sepiolite powder is 60:22:18) ultrasonication, stirring, mixing and stirring evenly, the stirring rate is 600r / min, and the stirring time is 40min; then pour the mixe...

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Abstract

The invention belongs to the technical field of aqueous batteries, and particularly discloses a vanadium oxide / carbon / clay composite positive electrode material which comprises two-dimensional vanadium oxide, one-dimensional clay and a carbon material, wherein the chemical formula of the two-dimensional vanadium oxide is V10O24.12H2O. The invention also provides a preparation method of the vanadium oxide / carbon / clay composite positive electrode material, which comprises the following steps of carrying out hydrothermal reaction on a raw material solution containing V2O5, one-dimensional clay, hydrogen peroxide and the carbon material to obtain gel, and carrying out freeze drying on the gel to obtain the vanadium oxide / carbon / clay composite positive electrode material. The invention also provides an application of the vanadium oxide / carbon / clay composite positive electrode material in an aqueous battery and the aqueous battery containing the material. The vanadium oxide / carbon material / clay aqueous battery composite positive electrode material is simple in preparation process and wide in raw material source, has better hydrophilicity and self-supporting property, can solve the problems of insufficient electronic conductivity and poor electrolyte ion diffusion performance of the aqueous battery positive electrode material, and meets the requirements of the current society for thenovel aqueous battery.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and in particular relates to a water-based battery electrode material. Background technique [0002] With the gradual development of the energy industry, the development and utilization of renewable energy such as solar energy and wind energy have made great progress, and the implementation of intermittent energy storage systems has also put forward higher requirements for electrochemical energy storage technology. Among many candidate electrochemical energy storage technologies, lithium-ion batteries have high energy density, but their large-scale applications are limited by the toxicity of their organic electrolytes, potential safety hazards, scarce lithium resources, and increasing cost. [0003] Emerging rechargeable aqueous batteries with aqueous electrolytes are a promising alternative to flammable organic electrolytes. Compared with traditional expensive and flammable lithium batteries, aqu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/62H01M4/04H01M10/36
CPCH01M4/0433H01M4/362H01M4/48H01M4/62H01M4/625H01M10/36Y02E60/10
Inventor 刘赛男杨华明张强
Owner CENT SOUTH UNIV
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