Method for preparing lithium cobaltoxide anode thin film of lithium ion battery

A battery lithium cobalt oxide and cathode thin film technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of high energy consumption and high production costs, and achieve the effects of uniform particle size distribution, less waste, and great practical value

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

Currently used to prepare LiCoO 2 The methods of thin film electrodes are mainly methods such as chemical vapor deposition, physical vapor deposition and sol-gel, and these methods generally have the following problems: (1) high energy consumption; (2) high production cost; (3) the prepared film needs subsequent Heat treatment to obtain ideal LiCoO 2 the crystal

Method used

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  • Method for preparing lithium cobaltoxide anode thin film of lithium ion battery
  • Method for preparing lithium cobaltoxide anode thin film of lithium ion battery
  • Method for preparing lithium cobaltoxide anode thin film of lithium ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0034] (1) Mechanical polishing is carried out after the metal Co sheet is drawn, after ultrasonic cleaning in acetone, then ultrasonic cleaning and drying with double distilled water;

[0035] (2) Dissolving 1 to 5 parts of lithium hydroxide in 100 to 500 parts of water to form a homogeneous aqueous solution system;

[0036] (3) Put 100-200ml LiOH solution into the reaction kettle with a polytetrafluoroethylene beaker, control the reaction temperature between 80-200°C, and control the current density at 0.0001-5mA / cm 2 , the reaction time is 1 to 24 hours;

[0037] (4) The working electrode is Co, the counter electrode is metal platinum sheet, and the reference electrode is Ag / AgCl electrode;

[0038] (5) Wash the working electrode with ethanol and deionized water respectively after the reaction;

[0039] (6) Washing and drying to obtain LiCoO with Co matrix 2 thin film electrodes.

Embodiment 2

[0041] (1) Mechanical polishing is carried out after the metal Ni sheet is obtained, after ultrasonic cleaning in acetone, then ultrasonic cleaning and drying with twice distilled water;

[0042] (2) Dissolving 1 to 5 parts of lithium hydroxide in 100 to 500 parts of water to form a homogeneous system of A solution;

[0043] (3) Dissolving 1 to 5 parts of cobalt nitrate in 10 to 50 parts of water to form a homogeneous system of B solution;

[0044] (4) Mix 1-10 parts of B solution with 1-10 parts of A solution to obtain Co(OH) 2 precipitation;

[0045] (5) Mix Co(OH) under stirring condition 2 Add 100-200ml LiOH solution to form a turbid solution;

[0046](6) Put the turbid liquid into a reaction kettle with a polytetrafluoroethylene beaker, control the reaction temperature between 80 and 200°C, and control the current density at 0.0001 to 5mA / cm 2 , the reaction time is 1 to 24 hours;

[0047] (7) The working electrode is a nickel sheet, the counter electrode is a metal ...

Embodiment 3

[0051] (1) Mechanical polishing is carried out after the metal Ni sheet is obtained, after ultrasonic cleaning in acetone, then ultrasonic cleaning and drying with twice distilled water;

[0052] (2) Dissolving 1 to 5 parts of lithium hydroxide in 100 to 500 parts of water to form a homogeneous system of A solution;

[0053] (3) Dissolving 1 to 5 parts of cobalt chloride in 10 to 50 parts of aqueous solution to form a homogeneous system of B solution;

[0054] (4) Mix 1-10 parts of B solution with 1-10 parts of A solution to obtain Co(OH) 2 precipitation;

[0055] (5) Mix Co(OH) under stirring condition 2 Add 100-200ml LiOH solution to form a turbid solution;

[0056] (6) Put the turbid liquid into a reaction kettle with a polytetrafluoroethylene beaker, control the reaction temperature between 80 and 200°C, and control the current density at 0.0001 to 5mA / cm 2 , the reaction time is 1 to 24 hours;

[0057] (7) The working electrode is a nickel sheet, the counter electrod...

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Abstract

The invention relates to a method for preparing a LiCoO2 anode thin film of a lithium ion battery, which is technically characterized by taking metal cobalt, cobalt nitrate and cobalt chloride as cobalt sources, taking lithium hydroxide as a lithium source, and preparing the LiCoO2 thin film electrode on the matrixes such as metal cobalt, nickel, tantalum, columbium or platinum and the like. The whole reaction is performed in aqueous solution; the diffusion speed, absorption speed, reaction speed and crystallization speed of cobalt ions and lithium ions are high; and the electrode reaction speed of LiCoO2 generation can be changed by adjusting an electrode potential so as to fulfill the aim of improving the reaction speed and reaction efficiency. A LiCoO2 thin film electrode with high purity, uniform granularity distribution and good electrical property can be prepared by one step at the temperature of below 200 DEG C in a sealed reaction kettle. The preparation process with low energy consumption and environmental protection provides a new study idea for preparing the LiCoO2 thin film electrode and other thin film electrode materials and has a relatively high utility value.

Description

technical field [0001] The invention relates to a lithium ion battery LiCoO 2 Preparation method of cathode thin film. Background technique [0002] Lithium-ion batteries have high energy density and are widely used in portable electronic devices such as mobile phones, digital cameras, notebook computers, business phones, and video disc players. In addition, as a replacement product for power supplies, micro-lithium-ion batteries will also have broad application prospects in ground and space military and civilian fields such as electric vehicles, regional electronic integrated information systems, satellites and aerospace. [0003] where LiCoO 2 The positive electrode material has the advantages of high voltage, stable discharge, suitable for large current discharge, high specific energy, good cycle performance, simple production process, stable electrochemical performance, etc., so LiCoO 2 The research carried out earlier, but also the most mature. At present, almost al...

Claims

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Application Information

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IPC IPC(8): H01M4/1391
CPCY02E60/12Y02E60/122Y02E60/10
Inventor 陶颖易丹青
Owner CENT SOUTH UNIV
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