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Method for preparing inorganic solid electrolyte thin film of lithium ion battery

A technology for lithium-ion batteries and electrolyte films, which is applied in the field of preparation of inorganic solid electrolyte films for lithium-ion batteries, can solve the problems of high energy consumption, subsequent heat treatment of films, and high production costs, and achieve excellent electrical properties and microscopic morphology parameters. The effect of harmonizing and reducing the three wastes

Inactive Publication Date: 2010-05-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The methods currently used to prepare inorganic solid electrolyte films are mainly methods such as physical vapor deposition, chemical vapor deposition, and sol-gel. These methods generally have the following problems: (1) high energy consumption; (2) high production costs; (3) The prepared film needs subsequent heat treatment

Method used

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  • Method for preparing inorganic solid electrolyte thin film of lithium ion battery
  • Method for preparing inorganic solid electrolyte thin film of lithium ion battery
  • Method for preparing inorganic solid electrolyte thin film of lithium ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) Polish the Pt sheet, after ultrasonic cleaning in acetone, treat with chromic acid for 16h, then ultrasonically clean and dry with twice distilled water;

[0033] (2) Mix 0.1 to 10 parts of LiOH, 0.1 to 2 parts of SiO under stirring conditions 2 , V 2 o 5 Add 100 parts of methanol organic solvent to form a turbid solution;

[0034] (3) Put the turbid liquid into a reaction kettle with a polytetrafluoroethylene liner;

[0035] (4) The reaction system in the reactor is connected to the external electric field through three electrodes;

[0036] (5) The three electrodes are respectively the Pt sheet as the working electrode, the Pt sheet as the counter electrode, and the Ag / AgCl electrode as the reference electrode;

[0037] (6) Control the temperature of the reaction system between 180°C and the current density at 0.0001~5mA / cm 2 , the reaction time is 10 to 24 hours;

[0038] (7) The working electrode after the reaction is washed with ethanol and deionized water...

Embodiment 2

[0041] (1) Polish the Pt sheet, after ultrasonic cleaning in acetone, treat with chromic acid for 16h, then ultrasonically clean and dry with twice distilled water;

[0042] (2) Mix 0.1 to 10 parts of LiOH, 0.1 to 2 parts of NH under stirring conditions 4 h 2 PO 4 , V 2 o 5 Add 100 parts of ethanol organic solvent to form a turbid solution;

[0043] (3) Put the turbid liquid into a reaction kettle with a polytetrafluoroethylene liner;

[0044] (4) The reaction system in the reactor is connected to the external electric field through three electrodes;

[0045] (5) The three electrodes are respectively the Pt sheet as the working electrode, the Pt sheet as the counter electrode, and the Ag / AgCl electrode as the reference electrode;

[0046] (6) Control the temperature of the reaction system between 150°C and the current density at 0.0001~5mA / cm 2 , the reaction time is 10-20 hours;

[0047] (7) The working electrode after the reaction is washed with ethanol and deionized w...

Embodiment 3

[0050] (1) Polish the negative electrode of lithium ion battery C, after ultrasonic cleaning in acetone, then ultrasonic cleaning with twice distilled water, blow dry;

[0051] (2) Add 0.1 to 10 parts of LiNO under stirring condition 3 , 0.1 to 2 parts of NH 4 h 2 PO 4 Add 100 parts of methanol organic solvent to form a turbid solution;

[0052] (3) Put the turbid liquid into a reaction kettle with a polytetrafluoroethylene liner;

[0053] (4) The reaction system in the reactor is connected to the external electric field through three electrodes;

[0054] (5) The three electrodes are the negative electrode of lithium ion battery C, the working electrode, the Pt sheet as the counter electrode, and the Ag / AgCl electrode as the reference electrode;

[0055] (6) Control the temperature of the reaction system between 120°C and the current density at 0.0001~5mA / cm 2 , the reaction time is 1 to 20 hours;

[0056] (7) The working electrode after the reaction is washed with etha...

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Abstract

The invention relates to a method for preparing an inorganic solid electrolyte thin film of a lithium ion battery, which is technically characterized in that: methanol, ethanol, benzene, methylbenzene and an organic solvent are taken as media; dissolved reactants are in an ion state at a certain temperature and under self-generated pressure of a solvent in a sealed reaction system; charged ions formed by dissolving directionally move under the action of an electric field and form a relatively high supersaturation degree nearby an electrode; and then the charged ions nucleate to grow into electrolyte crystals, namely the inorganic solid electrolyte thin film of the lithium ion battery is formed on a substrate. The inorganic solid electrolyte thin film of the lithium ion battery prepared by a solvent thermal electrochemical method is uniform and compact, and has the characteristics of high conductivity and low conductive activation energy of a lithium ion. The preparation process with low energy consumption and environmental protection provides a new study idea for preparing the inorganic solid electrolyte thin film of the lithium ion battery and other thin film electrode materials and has a relatively high utility value.

Description

technical field [0001] The invention relates to a preparation method of an inorganic solid electrolyte film for a lithium ion battery. Background technique [0002] Lithium-ion secondary batteries with liquid electrolytes have achieved great commercial success, but they have disadvantages such as easy leakage, complicated assembly, and poor safety. Therefore, solid-state electrolytes for lithium-ion batteries emerged as the times require. Among them, the all-solid-state battery assembled by inorganic solid electrolyte has the advantages of wide operating temperature, small self-discharge, long service life, convenient assembly, no need for diaphragm materials, miniaturization, low product price, and good high-temperature stability. Inorganic solid electrolytes for lithium-ion batteries can better solve the safety problems of electrochemical instability, thermal decomposition, flammability, electrolyte leakage and other environmental problems of organic electrolytes used in e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M10/0562
CPCY02E60/12Y02E60/10Y02P70/50
Inventor 陶颖易丹青赵广迪
Owner CENT SOUTH UNIV
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