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A total solid state lithium micro cell positive electrode film and method for making same

A technology of lithium micro-battery and cathode film, which is applied in the fields of electrochemistry and electronic products, can solve the problems of complex film-making process, high film-making cost, poor film performance, etc., and achieves simple equipment, low cost and easy to master. Effect

Inactive Publication Date: 2007-01-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among these film-making methods, expensive instruments and equipment are involved, the film-making cost is high, or the film-making process is complicated, and the film performance is not good, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] LiNi 0.80 co 0.20 o 2 Thin film preparation: accurately weigh Li(CH 3 COCH 2 COCH 2 )0.5817g, Ni(CH 3 COCH 2 COCH 2 ) 2 4H 2 O 1.2722g, Co(CH 3 COO) 2 4H 2 O 0.2705g, dissolve in the mixed solvent of 10ml tert-butanol and 6.1ml acetic acid, and make sol after completely dissolving. The obtained sol is coated on the polished and polished Pt substrate by a homogeneous method to obtain a gel film. The glue homogenization speed is 3000 rpm, and the glue homogenization time is 30 seconds. The resulting gel film was heated on a flat electric furnace at 400° C. for 5 minutes to evaporate the solvent and decompose the organic salts of Li, Ni, and Co into oxide films. Place the oxide film in a high-temperature sintering furnace, and anneal at 700°C for 60 minutes in an oxygen atmosphere to obtain α-NaFeO 2 Layered LiNi 0.80 co 0.20 o 2 film. Repeat the process of "uniform glue → heating → annealing" 9 times, and the thickness of the obtained film is 0.5 μm aft...

Embodiment 2

[0019] LiNiO 2 Thin film preparation: accurately weigh Li(CH 3 COCH 2 COCH 2 )0.5817g, Ni(CH 3 COCH 2 COCH 2 ) 2 4H 2 O 1.5903g, dissolve in the mixed solvent of 10ml tert-butanol and 6.1ml acetic acid, make sol after completely dissolving. The obtained sol is coated on the polished and polished Pt substrate by a homogeneous method to obtain a gel film. The glue homogenization speed is 3000 rpm, and the glue homogenization time is 30 seconds. The obtained gel film was heated on a flat electric furnace at 380° C. for 5 minutes to evaporate the solvent and decompose the organic salts of Li, Ni, and Co into oxide films. Place the oxide film in a high-temperature sintering furnace, and anneal at 750°C for 60 minutes in an oxygen atmosphere to obtain α-NaFeO 2 Layered LiNiO 2 film. Repeat the process of "uniform glue → heating → annealing" 9 times, and the thickness of the obtained film is 0.5 μm after testing. at 50μA / cm 2 Current, 3.0 ~ 4.2V voltage range, with 1M L...

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Abstract

This invention discloses a total solid lithium micro battery anode thin film process method, which uses acetylacetone lithium, acetylacetone nickel or acetylacetone nickel and acetate of cobalt as materials with the Ni and the Co in formula of LiNi1-xCoxO2 mole proportion as 1.00í½1.05: 1.00 for accurate material weighting and solves acetate and alcohols with mole proportion as one to one to make the sol. The invention adopts even sol method, which makes gel film on the base surface of Pt and Au and through pre-heating decomposing under the temperature of 350í½400Deg. C and through annealing under temperature of 650í½750Deg. C in oxygen gas to make the positive thin film of LiNi1-xCoxO2. íí

Description

technical field [0001] The invention discloses a LiNi battery for an all-solid lithium micro-battery 1-x co x o 2 Preparation method of cathode thin film. It belongs to the field of electrochemical and electronic product application technology. Background technique [0002] All-solid-state lithium micro-battery is a new type of micro-battery developed in recent years. With the development in the direction of globalization, the requirements for power supply are no longer based on the pursuit of power and current, and there is an urgent need for a micro power supply with small size, light weight, and high specific capacity to match it. The all-solid-state thin-film lithium micro-battery has high mechanical strength, does not contain flammable and volatile components, and does not have safety problems such as liquid leakage. Moreover, this type of battery has a long storage life and is suitable for supporting power supplies for various microelectronic products. The perform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/02H01M4/48H01M4/58H01M4/04H01M4/08C01G53/00H01M4/52H01M10/36
CPCY02E60/122H01M4/525C01G53/42C01P2006/40H01M10/052C01G51/42C01P2002/54C01P2004/61Y02E60/10
Inventor 刘韩星朱先军甘小燕胡晨曹明贺罗大兵欧阳世翕
Owner WUHAN UNIV OF TECH