Cathode material for sodium-ion battery and preparation method of cathode material

A sodium-ion battery and positive electrode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as electrode material structure collapse, and achieve the effects of improving capacity and cycle life, improving stretchability, and increasing voltage

Active Publication Date: 2015-03-11
QINGDAO NINEX NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a major problem in reality is that since the diameter of sodium ions is much larger than that of lithium ions, it is easy to cause the structure of the electrode material to collapse during ion intercalation in the battery reaction. One of the major challenges currently facing

Method used

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  • Cathode material for sodium-ion battery and preparation method of cathode material
  • Cathode material for sodium-ion battery and preparation method of cathode material
  • Cathode material for sodium-ion battery and preparation method of cathode material

Examples

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Effect test

Embodiment 1

[0028] A kind of positive electrode material of sodium ion battery, its preparation method is as follows:

[0029] 1) prepare the colloidal solution of vanadium pentoxide of saturated concentration with vanadium pentoxide powder and hydrogen peroxide, and prepare the graphene oxide aqueous solution that concentration is 4mg / mL with graphite powder by Hummers method;

[0030] 2) Evenly coat the graphene oxide aqueous solution on the base aluminum sheet, and then dry it on a heating platform at 60°C;

[0031] 3) coating the colloidal solution of vanadium pentoxide evenly on the aluminum sheet loaded with graphene oxide prepared in step 2), and then drying it on a heating platform at 60°C;

[0032] 4) Then, the graphene oxide aqueous solution is evenly coated on the aluminum sheet loaded with graphene oxide and vanadium pentoxide prepared in step 3), and dried on a heating platform at 60°C;

[0033] 5) Repeat step 2) to step 4) twice;

[0034] 6) The coated electrode material i...

Embodiment 2

[0036] A kind of positive electrode material of sodium ion battery, its preparation method is as follows:

[0037] 1) prepare the colloidal solution of vanadium pentoxide of saturated concentration with vanadium pentoxide powder and hydrogen peroxide, and prepare the graphene oxide aqueous solution that concentration is 9mg / mL with graphite powder by Hummers method;

[0038] 2) Spin-coat the graphene oxide aqueous solution on the base aluminum sheet, and then dry it on a heating platform at 60°C;

[0039] 3) spin-coat the colloidal solution of vanadium pentoxide on the aluminum sheet loaded with graphene oxide obtained in step 2), and dry it on a heating platform at 60°C;

[0040] 4) Then, the graphene oxide aqueous solution is spin-coated on the aluminum sheet loaded with graphene oxide and vanadium pentoxide prepared in step 3), and dried on a heating platform at 60°C;

[0041] 5) Repeat step 2) to step 4) twice;

[0042] 6) Vacuum-dry the spin-coated electrode material at...

Embodiment 3

[0044] A kind of positive electrode material of sodium ion battery, its preparation method is as follows:

[0045] 1) prepare the vanadium pentoxide colloidal solution that concentration is 0.1mol / L with vanadium pentoxide powder and hydrogen peroxide, and prepare the graphene oxide aqueous solution that concentration is 6mg / mL with graphite powder by Hummers method;

[0046] 2) Spin-coat the graphene oxide aqueous solution on the base aluminum sheet, and then dry it on a heating platform at 40°C;

[0047] 3) Spin-coat the colloidal solution of vanadium pentoxide on the aluminum sheet loaded with graphene oxide obtained in step 2), and dry it on a heating platform at 40°C;

[0048] 4) Then spin-coat the graphene oxide aqueous solution on the aluminum sheet loaded with graphene oxide and vanadium pentoxide prepared in step 3), and dry it on a heating platform at 40°C;

[0049] 5) Dry the spin-coated electrode material in vacuum at a temperature of 120° C. for 12 hours, and fin...

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Abstract

The invention discloses a cathode material for a sodium-ion battery and a preparation method of the cathode material. The cathode material consists of a base and a laminated structure, wherein the base is coated with the laminated structure, and carbon material-vanadium oxide-carbon material is taken as a repeating unit. The preparation method comprises the following steps: firstly preparing a vanadium oxide colloidal solution and a carbon material aqueous solution, then coating the base with the carbon material aqueous solution in a spin manner and baking, then coating the base with the vanadium oxide colloidal solution in a spin manner and baking, then coating a layer of carbon material again, and repeating the above steps according to requirements, and finally drying to obtain the cathode material. The prepared electrode material is more beneficial to the intercalation capacity of sodium ions and excellent de-intercalation reversibility; the crystal structure of the vanadium oxide is larger in frame, so that intercalation of sodium ions is facilitated, the material structures are prevented from collapsing during the de-intercalation process of the sodium ions, the carbon material can promote the stretchability of the material, the damage to the material in the intercalation process of the sodium ions is reduced, and the practical capacity of the battery is improved greatly and the cycle life of the battery is greatly prolonged.

Description

technical field [0001] The invention relates to the field of electrode materials for sodium ion batteries, in particular to a positive electrode material for sodium ion batteries and a preparation method thereof. Background technique [0002] The continuous consumption of existing energy has prompted countries to continue to seek alternative new energy storage materials, and various energy storage products are gradually selling in the market. The chemical power industry has also been exploring new high specific energy and long cycle life. secondary battery. As new energy storage devices, lithium-ion batteries and supercapacitors are used in military, transportation, communication, medical and other fields due to their unique advantages. However, the large-scale mining of lithium mines has led to a rise in lithium prices, which has further led to the foreseeable depletion of lithium mine energy. Therefore, in recent years, people have begun to look for new types of batterie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/587H01M10/054
CPCH01M4/362H01M4/48H01M4/587H01M10/054Y02E60/10
Inventor 陈久存李文君李长明刘茵沁吴超
Owner QINGDAO NINEX NEW ENERGY TECH CO LTD
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