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Preparation method of novel energy battery composite cobalt carbonate negative electrode material

A technology of negative electrode material and cobalt carbonate, which is applied in the field of preparation of composite cobalt carbonate negative electrode material for new energy batteries, can solve the problems of poor conductivity, large stress on materials, low energy density, etc., and achieve the effect of avoiding aggregation

Inactive Publication Date: 2019-09-06
易尧芳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main technical problem to be solved by the present invention is: Although the conventional commonly used graphite anode has good electrical conductivity, its energy density is low, while most of other anode materials with high energy density are semiconductors or even insulators, and their conductivity is poor. During use, that is, during the charge-discharge cycle, accompanied by volume changes, it is easy to generate large stress inside the material, causing the material to pulverize and collapse during use, resulting in no further improvement in the electrochemical performance of the product and the cycle performance of the battery. The drawbacks of the new energy battery cobalt carbonate negative electrode material preparation method is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0027] In parts by weight, take 40 parts of graphene oxide, 10 parts of sodium polystyrene sulfonate, and 150 parts of water in turn, first mix graphene oxide and water into No. 1 beaker, and ultrasonically After dispersing for 60 minutes, add sodium polystyrene sulfonate to the No. 1 beaker, and continue to stir and mix with a stirrer at a speed of 400r / min for 50 minutes to obtain a pretreated graphene oxide dispersion; The treated graphene oxide dispersion and the cobalt salt solution with a mass fraction of 10% are mixed and poured into a No. 2 beaker, and after stirring and mixing for 60 minutes with a stirrer at a speed of 500r / min, add 0.2 times the mass of the pretreated graphene oxide dispersion. Chitosan dispersion, continue to stir and mix for 50min to obtain the aqueous phase dispersion; in parts by weight, take 100 parts of oleic acid, 15 parts of silicate, and 20 parts of dehydrated alcohol, mix and pour into No. 3 beaker, Stir and mix with a stirrer at a speed o...

example 2

[0029] In terms of parts by weight, take 40 parts of activated carbon, 10 parts of sodium polystyrene sulfonate, and 150 parts of water in turn, first mix the activated carbon and water into a No. 1 beaker, and ultrasonically disperse for 60 minutes under the condition of an ultrasonic frequency of 60 kHz. Then add sodium polystyrene sulfonate to the No. 1 beaker, continue to stir and mix the reaction with a stirrer at a speed of 400r / min for 50min to obtain a pretreated activated carbon dispersion; mix the pretreated activated carbon dispersion and mass Mix the cobalt salt solution with a fraction of 10% and pour it into the No. 2 beaker, stir and mix with a stirrer at a speed of 500r / min for 60min, then add the chitosan dispersion that is 0.2 times the mass of the pretreated activated carbon dispersion, and continue to stir and mix for 50min , to obtain an aqueous phase dispersion; in parts by weight, successively take 100 parts of oleic acid, 15 parts of silicate, and 20 par...

example 3

[0031] In parts by weight, take 40 parts of graphene oxide and 150 parts of water successively, first mix graphene oxide and water into No. / min speed of stirring and mixing for 50 minutes to obtain a pretreated graphene oxide dispersion; the pretreated graphene oxide dispersion and the cobalt salt solution with a mass fraction of 10% were mixed and poured into a No. 2 beaker at a mass ratio of 5:1. Stir and mix with a stirrer at a speed of 500r / min for 60min, then add a chitosan dispersion of 0.2 times the quality of the pretreated graphene oxide dispersion, and continue stirring and mixing for 50min to obtain an aqueous phase dispersion; Take 100 parts of oleic acid, 15 parts of silicate, and 20 parts of absolute ethanol, mix them into a No. 3 beaker, stir and mix with a stirrer at a speed of 500r / min for 60min, and obtain a silicate dilution; calculated in parts by weight , take 80 parts of aqueous phase dispersion, 60 parts of diluent of silicate, and 10 parts of precipita...

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Abstract

The invention discloses a preparation method of a novel energy battery composite cobalt carbonate negative electrode material, and belongs to the technical field of new energy materials. The preparation method comprises the following steps that firstly, graphene oxide is dispersed into water, and sodium polystyrenesulfonate is added to prepare a pretreated graphene oxide dispersion liquid, then stirring and mixing are carried out on the mixture with a cobalt salt solution and a chitosan dispersion liquid to prepare a water phase dispersion liquid; then, oleic acid, silicate ester and absoluteethyl alcohol are used as raw materials to prepare an oil phase dispersion liquid; then in a constant temperature stirring state, a water phase dispersion liquid is dropwise added into the oil phase dispersion liquid slowly, and a precipitant is dropwise added after the water phase dispersion liquid is dropwise added; continuously stirring and reacting are performed at a constant temperature afterthe dropwise addition of the precipitant is finished, and then centrifugal separation, washing and drying are carried out to obtain a precursor; the precursor is slowly heated to 280-300 DEG C in aninert gas protective state, a heat preservation reaction is performed and then cooling is carried out to obtain a pyrolysis material; and the obtained pyrolysis material is soaked in an alkali liquor,and then the pyrolysis material is washed to be neutral, and dried to obtain the composite cobalt carbonate cathode material of the new energy battery.

Description

technical field [0001] The invention discloses a preparation method of a new energy battery composite cobalt carbonate negative electrode material, belonging to the technical field of new energy materials. Background technique [0002] At present, there are many kinds of anode materials researched and developed, but there are still many problems in the application of large-scale industrialized high energy density new energy batteries. One of the problems is the conductivity of the material. For example, although the commonly used graphite anode has good conductivity, it is difficult to correct its shortcoming of low energy density, while other lithium ion anode materials with high energy density, such as silicon, silicon oxide, transition Group metal oxides are not good conductors of electrons, most of them are semiconductors or even insulators, which have poor conductivity, and conductivity is the basic requirement of anode materials for new energy batteries, which can dire...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/362H01M4/5825H01M4/628H01M10/0525H01M2004/027Y02E60/10
Inventor 易尧芳
Owner 易尧芳
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