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A lithium ion film battery cathode and its preparing method

A thin-film battery and lithium-ion technology, applied in electrode manufacturing, battery electrodes, circuits, etc., to achieve the effects of alleviating volume changes, uniform composition distribution, and improving cycle performance

Inactive Publication Date: 2007-08-15
UNIV OF SCI & TECH OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, there has been no use of electrostatic spray deposition to prepare the anode material XLi for miniature lithium-ion batteries. 2 O·YSnO 2 ·Report on ZCuO thin film electrode

Method used

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  • A lithium ion film battery cathode and its preparing method
  • A lithium ion film battery cathode and its preparing method
  • A lithium ion film battery cathode and its preparing method

Examples

Experimental program
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Embodiment 1

[0019] First assemble the electrostatic spray deposition device used in the present invention: put one end of the 0.8 mm inner diameter silicone tube into a 250 ml conical flask containing the precursor solution, and connect the other end with a 0.4 mm inner diameter injection needle, and then fix the silicone tube on the peristaltic In the groove of the flow tube of the pump, the positive wire clamp of the DC high voltage generator with a control flow range of 0-50 ml / hour and a voltage range of 0-40000V is connected to the injection needle and the needle point is kept upright, 1-4 directly above the needle point. A thermocouple is placed horizontally at the centimeter, with a temperature control range of 0-800℃, and the negative pole of the DC high voltage generator is connected to the thermocouple.

[0020] Then prepare the precursor solution: take 0.25mmol LiNO respectively 3 ·H 2 O, 0.25mmolCu(NO3) 2 ·3H 2 O and 0.25mmolSn(NO3) 2 Place in a 50 ml conical flask, measure 50 ml ...

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Abstract

The disclosed preparation method for negative electrode of a Li-ion thin film cell comprises: mixing the LiNO3, Sn(NO3)4 and Cu(NO3)2 with mole ratio as 0.25-4:1:0.25-4, dissolving into mixed solution of glycol, 1,2-propylene glycol, and ethanol; uniform flowing the obtained predecessor with 2-4ml / h velocity to a fog head with a distance to the substrate as 1-4cm; forcing dc voltage between the head and substrate for 60-240min, while controlling substrate temperature as 200-500 deg. Wherein, the porous ball-shaped thin film chemical formula is XLi2OíñYSnO2íñZCuO with X: Y: Z = 0.1-2: 1:2-0.1 (1:1:1 for better), of 1-200um height, of 5-10um ball diameter, well first discharge capacity, low first capacity loss, and super cycle performance.

Description

Technical field [0001] The invention belongs to the technical field of thin-film electrodes for miniature lithium-ion batteries, and particularly relates to a tin-rich lithium-ion thin-film battery negative electrode. Background technique [0002] Lithium-ion secondary batteries, which are used as the main power source of mobile communication equipment and portable electronic equipment, have become a research hotspot due to their excellent performance such as high output voltage and high energy density. In recent years, with the widespread application of microelectronic devices, power supply devices are required to be miniaturized, high energy density, and high rate performance. Therefore, the electrodes of thin-film lithium-ion batteries are of great significance to the development of microelectronic devices. [0003] The United States patent USA Patent US6727020 describes the preparation of silicon-tin glassy composite oxide as the negative electrode material of lithium-ion bat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/04B05C5/00
CPCY02E60/10
Inventor 陈春华余彦张承平
Owner UNIV OF SCI & TECH OF CHINA
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