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Na3V2(PO4)3 cathode material for sodium-ion battery as well as preparation and application of cathode material

A technology of sodium ion battery and sodium vanadium phosphate, which is applied in the direction of battery electrodes, secondary batteries, circuits, etc., can solve the problems of increasing production costs, and achieve the effects of increasing effective reaction sites, simple and easy preparation process, and low cost

Inactive Publication Date: 2018-06-08
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, researchers usually add templates to control the morphology of materials during the preparation process, but templates often increase the cost of preparation

Method used

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  • Na3V2(PO4)3 cathode material for sodium-ion battery as well as preparation and application of cathode material
  • Na3V2(PO4)3 cathode material for sodium-ion battery as well as preparation and application of cathode material
  • Na3V2(PO4)3 cathode material for sodium-ion battery as well as preparation and application of cathode material

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Mix sodium hydroxide, ammonium dihydrogen phosphate, and ammonium metavanadate at a stoichiometric ratio of 3:2:3, place in an 800-degree muffle furnace, and keep the temperature for 1 hour; after cooling, take the mixture out of the muffle furnace , Grind into solid powder intermediate phase A, mix intermediate phase A and sucrose at a mass ratio of 7:3, and add 30ml of deionized water to configure suspension B; place suspension B in a ball mill jar Ball milling, the ball milling speed is 480rpm, and the ball milling time is 10h; after the ball milling, put the suspension B in an oven at 100°C for 12 hours and dry it at a constant temperature; after returning to room temperature, grind the dried suspension B into In the form of solid powder, place it in a tube furnace containing an argon atmosphere at a constant temperature of 350 degrees for 5 hours to remove excess water and gas to form a precursor C of sodium vanadium phosphate; take the precursor C out of the tube f...

Embodiment 2

[0029] Mix sodium hydroxide, ammonium dihydrogen phosphate, and ammonium metavanadate at a stoichiometric ratio of 3:2:3, place in an 800-degree muffle furnace, and keep the temperature for 1 hour; after cooling, take the mixture out of the muffle furnace , Grind into solid powder interphase A, mix interphase A and sucrose at a mass ratio of 3:1, and add 30ml of deionized water to configure suspension B; place suspension B in a ball mill jar Ball milling, the ball milling speed is 480rpm, and the ball milling time is 10h; after the ball milling, put the suspension B in an oven at 100°C for 12 hours and dry it at a constant temperature; after returning to room temperature, grind the dried suspension B into In the form of solid powder, place it in a tube furnace containing an argon atmosphere at a constant temperature of 350 degrees for 5 hours to remove excess water and gas to form a precursor C of sodium vanadium phosphate; take the precursor C out of the tube furnace, and Aft...

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Abstract

The invention relates to a Na3V2(PO4)3 cathode material for a sodium-ion battery as well as preparation and application of the cathode material. An intermediate phase with laminar morphology and highdegree of crystallinity is synthesized from cheap raw materials to serve as a template, and formation of a final product, namely, nanoscale Na3V2(PO4)3 with laminar morphology, is controlled. According to the preparation method, the raw material cost is low, the preparation process is simple and easy, Na3V2(PO4)3 synthesized from the intermediate phase as the template is of a flower-like structurestacked in a nanosheet shape, and shows excellent rate performance and excellent cycling stability when used as the cathode material to be applied to the sodium-ion battery.

Description

technical field [0001] The invention relates to the technical field of electrode materials for sodium ion batteries, in particular to a positive electrode material for sodium ion batteries and a preparation method thereof. technical background [0002] As we all know, metallic sodium element is relatively abundant in the earth's crust (sodium content in the earth's crust is about 2.75%, while lithium content is about 0.065‰) and widely distributed (sodium is distributed all over the world, while about 70% of lithium is concentrated in At the same time, the physical and chemical properties of sodium and lithium are similar and the extraction / intercalation mechanism is similar. Therefore, the research and development of sodium-ion batteries is expected to alleviate the limited development of energy storage batteries caused by the shortage of lithium resources to a certain extent. In addition to the advantages of abundant resources, low cost, and wide distribution, sodium will ...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M10/054
CPCH01M4/5825H01M10/054Y02E60/10
Inventor 张华民郑琼易红明刘婉秋张洪章冯凯李先锋
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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