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Promoter for solid electrolyte film of lithium cell

A solid electrolyte membrane and accelerator technology, applied in battery electrodes, secondary batteries, circuits, etc., to achieve good uniformity, improve cycle life, and prevent electrochemical agglomeration

Inactive Publication Date: 2005-03-16
LIYANG TIANMU PILOT BATTERY MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the electrode material failure caused by the easy peeling of the solid electrolyte membrane formed in the prior art, the addition of additives will easily cause the kinetic behavior and high current performance of the electrode material to deteriorate, increase the manufacturing cost of the battery, and limit the operating temperature range of the battery and other defects, so as to provide a solid electrolyte membrane that helps to form a solid electrolyte membrane that does not deteriorate the kinetic behavior and high-current performance of the electrode material, does not increase battery manufacturing costs, limits the operating temperature range, and prevents the reduction and decomposition of the electrolyte. , and can solve the problem of electrode peeling and failure for the solid electrolyte membrane accelerator for lithium batteries

Method used

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  • Promoter for solid electrolyte film of lithium cell
  • Promoter for solid electrolyte film of lithium cell

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Deposit nano-silver particles with a particle size of 0.3nm on the electrode surface using tin-antimony alloy as the electrode material: use the method of physical vapor deposition, add evaporation source Ag in a vacuumed physical vapor deposition furnace, and deposit on the tin-antimony alloy electrode On the substrate of the sheet, the deposition time was 2 minutes.

[0030] Dry the electrode sheet with nano-metal silver deposited on the surface at 150° C. for 12 hours. After drying, the composite material is cut to an area of ​​1cm 2 The circular sheet was used as a composite electrode to investigate its electrochemical performance as a negative electrode active material for a secondary lithium battery, and an experimental button battery was used for research. The experimental battery structure is as Figure 6 As shown, the electrolyte is 1 mol / liter lithium hexafluorophosphate (LiPF 6 ) dissolved in acrylic carbonate solution, dry the stainless steel sealing nut ...

Embodiment 2～55

[0032] According to the method in Example 1, accelerators with different compositions and particle sizes were deposited on the surface of the electrode, and the properties of the electrode were tested. The measured data are listed in Table 1.

[0033]

[0034] The obtained composite material of material in embodiment 5 is done X-ray diffraction as figure 1 As shown, it can be seen that the obtained material has no other substances except MCMB and nanosilver. figure 2 It is a scanning electron microscope photo of the composite material obtained. It can be seen that the nano-silver particles have a size of 8 nanometers and are attached to carbon spheres with an average size of 5 microns. The X-ray energy dispersive analysis results of its surface selection are shown in Figure 3, indicating that the material is a carbon-silver composite material. The scanning electron microscope image of the electrode surface after 20 weeks of material circulation is shown in Figu...

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Abstract

The invention relates to a accelerating agent of solid conposite membrane for lithium cell, which is one millimicron metal chosen from Ag, Cu, Au, Zn, Fe, Co, Ni, Ru, Rh, Pd, Pt, Ir, Os or Al, or from millimicron alloy whose expression is MX11MX22...MXnn (M1,M2,...Mn stands for different elements which are chosen from main group element like Li, or transition metal like Ag) and at least containing one kind of Ag, Cu, Au, Zn, Fe, Co, Ni, Ru, Rh, Pd, Pt, Ir, Os or Al. The average size of particles is 0.3~250nm. The accelerating agent deposits on the surface of electrode, which forms solid electrolyte membrane with certain flexibility on the surface of electrode, which forms solid electrolyte membrane with certain flexibility on the surface of electrode, greatly increasing service life of electrode material, making the battery own excellent electrochemical periodicity and property of large electric current, and reducing the manufacturing cost for electrode, satisfying the requirements of portable electronic apparatus and discharge and charge of large-powdered battery in electric automobile in the future.

Description

technical field [0001] The present invention relates to a kind of promotor for the solid electrolyte film of lithium battery and its use and application method, in particular to a kind of promotor for forming organic / inorganic solid electrolyte film on the electrode material particle surface of secondary lithium battery Accelerators, uses and methods of use thereof. technical background [0002] Concerns about the environment and thinking about energy shortages have led people to make new plans for the future of fuel vehicles. Electric vehicles powered by high-energy secondary lithium batteries and hybrid electric vehicles powered by both fuel and batteries have received more and more attention, which puts forward high power requirements for secondary lithium-ion batteries. Since the surface solid electrolyte film formed on the surface of the negative electrode material of the secondary lithium battery during the discharge process has a great influence on the performance of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/00H01M10/40
CPCY02E60/122
Inventor 吴晓东陈立泉黄学杰
Owner LIYANG TIANMU PILOT BATTERY MATERIAL TECH CO LTD
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