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Lithium ion battery

A lithium-ion battery and electrolyte technology, which is applied in the direction of batteries, secondary batteries, battery electrodes, etc., can solve problems such as solid electrolyte/electrode interface compatibility issues, achieve shortened membrane material manufacturing time, excellent performance, and avoid running Material effect

Active Publication Date: 2018-06-15
王海斌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the introduction of solid electrolytes has made all-solid-state lithium batteries with high and safe energy density a reality, but it has brought another key problem, that is, the compatibility of the solid electrolyte / electrode interface.

Method used

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Examples

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Effect test

Embodiment 1

[0041] Prepare the positive active material: configure nickel sulfate, aluminum sulfate, cobalt sulfate mixed sulfate solution according to the molar ratio of 1:1:1; configure the mixed alkali solution of NaOH and ammonia water according to the molar ratio of 1:2; 2 / 3 co 2 / 3 mn 2 / 3 (OH) 2 Pour the precursor solution into the reaction kettle, run at a speed of 700r / min, and raise the temperature to 55°C, adjust the pH to 11.1, add the mixed sulfate solution and the mixed alkali solution dropwise, control the pH at 11.1, and let it sit and filter and dry; Mix the filtered and dried mixture with lithium carbonate, ball mill in a planetary ball mill at a speed of 180r / min for 15 hours, dry grind and roast at 750°C to obtain a positive electrode active material;

[0042] Positive electrode preparation: first dissolve 5 parts of PAA binder into 50 parts of PEG solvent, then add 85 parts of positive electrode active material and 2 parts of conductive agent and mix them in an agate ...

Embodiment 2

[0050] Prepare the positive active material: configure nickel sulfate, aluminum sulfate, cobalt sulfate mixed sulfate solution according to the molar ratio of 1:1:1; configure the mixed alkali solution of NaOH and ammonia water according to the molar ratio of 1:2; 2 / 3 co 2 / 3 mn 2 / 3 (OH) 2 Pour the precursor solution into the reaction kettle, run at a speed of 710r / min, and raise the temperature to 56°C, adjust the pH to 11.12, add the mixed sulfate solution and the mixed alkali solution dropwise, control the pH at 11.12, and let it sit and filter and dry; Mix the filtered and dried mixture with lithium carbonate, ball mill in a planetary ball mill at a speed of 185r / min for 16h, dry grind and roast at 760°C to obtain a positive active material;

[0051] Positive electrode preparation: first dissolve 6 parts of PAA binder into 52 parts of PEG solvent, then add 86 parts of positive electrode active material and 3 parts of conductive agent and mix them in an agate jar, place th...

Embodiment 3

[0059] Prepare the positive active material: configure nickel sulfate, aluminum sulfate, cobalt sulfate mixed sulfate solution according to the molar ratio of 1:1:1; configure the mixed alkali solution of NaOH and ammonia water according to the molar ratio of 1:2; 2 / 3 co 2 / 3 mn 2 / 3 (OH) 2 Pour the precursor solution into the reaction kettle, run at a speed of 725r / min, and raise the temperature to 57°C, adjust the pH to 11.15, add the mixed sulfate solution and the mixed alkali solution dropwise, control the pH at 11.15, and let it sit and filter and dry; Mix the filtered and dried mixture with lithium carbonate, ball mill in a planetary ball mill at a speed of 190r / min for 17h, dry grind and roast at 765°C to obtain a positive electrode active material;

[0060] Positive electrode preparation: first dissolve 8 parts of PAA binder into 55 parts of PEG solvent, then add 88 parts of positive electrode active material and 4 parts of conductive agent and mix them in an agate jar...

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Abstract

The invention relates to a lithium ion battery, and belongs to the field of lithium ion battery materials. The lithium ion battery comprises a cathode, an anode and a solid electrolyte thin film whichis coated on the cathode and the anode through a coating method, wherein the solid electrolyte thin film is one or two of polymer electrolyte and inorganic solid electrolyte. The cathode and the anode of the lithium ion battery are coated with the solid electrolyte thin film by adopting a specific-width-and-thickness coating method, so that a uniform solid electrolyte thin film can be obtained; and meanwhile, LiNi1 / 3Co1 / 3Mn1 / 3O2 having a surface coated with Ni1 / 3Co1 / 3Al1 / 3(OH)2 is used as a cathode active substance, so that the discharging specific capacity of the obtained lithium ion batteryis increased, and the capacity attenuation rate is reduced.

Description

field of invention [0001] The invention relates to a lithium ion battery and belongs to the field of lithium ion battery materials. Background technique [0002] The energy density of a lithium battery depends on the positive and negative electrodes of the battery, the electrolyte material and the matching between them. In order to meet the increasing demand for battery energy density, a lot of research has focused on the development of new cathode and anode materials, for example, research on high voltage cathode materials greater than 5V. However, the application of these high-voltage materials is greatly restricted by the low electrolyte decomposition voltage (~4.5V) and the defects of flammability and explosion. Moreover, currently commonly used cathode materials such as lithium cobaltate, lithium iron phosphate and ternary materials have low theoretical specific capacities, and the assembled batteries cannot break through 250Wh kg -1 The bottleneck of energy density m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/0587H01M10/0562H01M10/0565H01M4/505H01M4/525
CPCH01M4/505H01M4/525H01M10/0525H01M10/0562H01M10/0565H01M10/0587H01M2220/20H01M2300/0068H01M2300/0071H01M2300/0082Y02E60/10Y02P70/50
Inventor 林月程昀刘晋
Owner 王海斌
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