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Mixed aqueous lithium battery colloidal electrolyte solution and preparation method thereof

A colloidal electrolyte and lithium battery technology, applied in secondary batteries, electrolyte immobilization/gelation, circuits, etc.

Inactive Publication Date: 2018-11-09
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problem of the stability and strength of gas-phase silica in the colloidal electrolyte of the mixed aqueous lithium ion battery, the present invention proposes an aqueous lithium battery electrolyte and a preparation method thereof

Method used

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Examples

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Effect test

Embodiment 1

[0028] A kind of preparation of mixed aqueous lithium battery colloidal electrolyte, specifically comprises the following steps:

[0029] (1) Li containing crystal water 2 SO 4 and ZnSO 4 Dissolve in deionized water, adjust the pH of the solution to 3 to obtain a mixed solution; the Li containing crystal water 2 SO 4 and ZnSO 4 The mixing mass ratio is 4:18; The concentration of the mixed solution is 5g / L;

[0030] (2) Add deoxygenated ultrapure water into the reaction kettle, add gas-phase silica to vacuumize, fill with nitrogen, fully remove the air in the device, use a magnetic stirrer to fully stir and disperse in a nitrogen atmosphere for 6 hours, Add lithium diatomaceous earth and γ-polyglutamic acid under the protection of nitrogen, stir and mix evenly; the particle size of the fumed silica is 10nm, and the specific surface area is 200m 2 / g; the stirring rate of the magnetic stirrer is 600r / min; the mass ratio of the fumed silica, lithium and gamma-polyglutamic a...

Embodiment 2

[0036] A kind of preparation of mixed aqueous lithium battery colloidal electrolyte, specifically comprises the following steps:

[0037] (1) Li containing crystal water 2 SO 4 and ZnSO 4 Dissolve in deionized water, adjust the pH of the solution to 3 to obtain a mixed solution; the Li containing crystal water 2 SO 4 and ZnSO 4 The mixing mass ratio is 4:15; The concentration of the mixed solution is 5g / L;

[0038] (2) Add deoxygenated ultrapure water into the reaction kettle, add fumed silica to vacuumize, fill with nitrogen, fully remove the air in the device, use a magnetic stirrer to fully stir and disperse in a nitrogen atmosphere for 8 hours, Add lithium diatomaceous earth and γ-polyglutamic acid under the protection of nitrogen, stir and mix evenly; the particle size of the fumed silica is 20nm, and the specific surface area is 200m 2 / g; the stirring rate of the magnetic stirrer is 1000r / min; the mass ratio of the fumed silica, lithium and gamma-polyglutamic acid...

Embodiment 3

[0044] A kind of preparation of mixed aqueous lithium battery colloidal electrolyte, specifically comprises the following steps:

[0045] (1) Li containing crystal water 2 SO 4 and ZnSO 4 Dissolve in deionized water, adjust the pH of the solution to 5 to obtain a mixed solution; the Li containing crystal water 2 SO 4 and ZnSO 4 The mixing mass ratio is 8:16; The concentration of the mixed solution is 6g / L;

[0046] (2) Add deoxygenated ultrapure water into the reaction kettle, add fumed silica to vacuumize, fill with nitrogen, fully remove the air in the device, use a magnetic stirrer to fully stir and disperse in a nitrogen atmosphere for 8 hours, Add lithium diatomaceous earth and γ-polyglutamic acid under the protection of nitrogen, stir and mix evenly; the particle size of the fumed silica is 40nm, and the specific surface area is 300m 2 / g; the stirring rate of the magnetic stirrer is 1200r / min; the mass ratio of the fumed silica, lithium and gamma-polyglutamic acid...

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Abstract

Belonging to the technical field of electrochemistry, the invention specifically provides a mixed aqueous lithium battery colloidal electrolyte solution and a preparation method thereof. The preparation method includes: dissolving crystal water-containing Li2SO4 and ZnSO4 in deionized water, and adjusting the pH value; adding fumed silica into a reaction kettle and conducting vacuum pumping, performing nitrogen filling to form nitrogen atmosphere, conducting magnetic stirring dispersion, adding laponite and gamma-polyglutamic acid, and adding a cross-linking agent to obtain the mixed aqueous lithium battery colloidal electrolyte solution. According to the mixed aqueous lithium battery colloidal electrolyte solution provided by the invention, by adding laponite and gamma-polyglutamic acid,the mechanical strength of the colloid can be increased, the colloid formed by a long-chain structure has better electrochemical stability than the colloid formed by small molecule beta-cyclodextrin,a synergistic effect can be produced between electrodes and the electrolyte solution, at the same time side reaction at the negative electrode can be inhibited to enable zinc to deposit zinc on the negative electrode surface smoothly, thus alleviating dissolution of manganese ions into the electrolyte solution and reducing floating charging current, better rate performance and cycle performance can be acquired, and the mixed aqueous lithium battery colloidal electrolyte solution also has excellent stability at the same time.

Description

technical field [0001] The invention belongs to the technical field of preparation of ternary battery electrolyte, and in particular relates to a mixed aqueous lithium battery colloidal electrolyte and a preparation method. Background technique [0002] Since the commercialization of lithium-ion batteries using lithium-ion intercalation compounds (carbon and lithium cobaltate) and organic electrolytes in 1990, they have rapidly occupied the small battery market due to their high specific energy advantages and have been widely used in mobile phones and notebooks. Computers, cameras and other communication devices. However, despite the many advantages of organic lithium-ion batteries, the organic solvents used in them are not only toxic but also flammable, which will bring many safety problems if not used properly. In addition, the production cost is also greatly increased due to the anhydrous operating environment, which greatly limits its application in large-scale energy s...

Claims

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Application Information

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IPC IPC(8): H01M10/0562H01M10/0525
CPCH01M10/0525H01M10/0562H01M2300/0085Y02E60/10
Inventor 陈庆赵海林
Owner CHENDU NEW KELI CHEM SCI CO LTD
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