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Cathode material of lithium and its production method

A cathode material, lithium battery technology, applied in the direction of electrode manufacturing, battery electrodes, lithium batteries, etc., can solve the problem of low porosity, and achieve the effects of good cycle durability, uniform film thickness, and large charging capacity

Inactive Publication Date: 2008-04-30
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although some foreign researchers have studied V 2 o 5 Thin films have been studied as cathode materials for lithium batteries, but these V 2 o 5 The film has a dense structure, low porosity, non-aerogel structural material, and V 2 o 5 The preparation of the sol is mainly through the hydrolysis of vanadium alkoxide, vanadic acid polymerization and V 2 o 5 melt cooling method
V has not yet been found 2 o 5 Airgel film especially with the V prepared by the method of the present invention 2 o 5 Patent report on airgel thin film as lithium battery cathode material

Method used

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  • Cathode material of lithium and its production method
  • Cathode material of lithium and its production method
  • Cathode material of lithium and its production method

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Embodiment Construction

[0026] The present invention and its beneficial effects are further described below through the embodiments and accompanying drawings.

[0027] A preparation method for lithium battery cathode material, comprising the following steps,

[0028] 1. V 2 o 5 Sol preparation

[0029] Preparation of V by sol-gel method 2 o 5 Sol, the V 2 o 5 Powder, benzyl alcohol and isopropanol or isobutanol were mixed in a molar ratio of 1:4:40, refluxed at 110°C for 5 hours, and then centrifuged at 3000 rpm for 30 minutes to remove unreacted residual substances , to get a dark green opaque V 2 o 5 The sol was then aged in an oven at 50°C for 3 days, and centrifuged at 3000 rpm for 20 minutes to obtain a yellow-green transparent V 2 o 5 Sol.

[0030] 2. Preparation of thin film materials

[0031] 1) Substrate processing

[0032] Using ITO conductive glass as the substrate, the cleaning steps of the substrate are as follows: put the conductive glass into the ultrasonic cleaning pool, ...

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Abstract

The cathode material of lithium cell is V2O5 aerogel film. Its specific surface is 120-280m2 / g, and its void ratio is 60-90%. With collosol-gel method, V2O5 powder, benzoic alcohol, isopropyl alcohol or isobutyl alcohol is taken as material. Through backflow makes V2O5 collosol-gel. Through spin coating, crystal pulling method and spray painting method makes film. Through super critical drying or solvent replace drying method makes V2O5 aerogel film.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to V 2 o 5 Airgel thin film lithium battery cathode material and preparation method thereof. Background technique [0002] Lithium batteries have developed very rapidly in the past two decades, especially rechargeable lithium batteries have been rapidly developed and commercialized in the 1990s. Since many electronic circuits used in industry require high operating voltage, most of the research work is mainly focused on the research and development of cathode materials for 4V lithium batteries. In recent years, with the rapid development of the microelectronics industry, a new trend has emerged in the industrial application of lithium batteries. A large number of electronic components such as integrated block CMOS memory require low working voltage (2 ~ 3V), and micro devices, micro sensors, integrated circuits and VLSI also need low working voltage (3V), and need to develop and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/48H01M4/04C01G31/02H01M10/36
CPCY02E60/122H01M10/052H01M4/485Y02E60/10
Inventor 吴广明夏长生张志华沈军周斌倪星元
Owner TONGJI UNIV
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