Nanometer metal or alloy composite material and preparation and usage thereof

A composite material and electrode technology, used in electrode manufacturing, battery electrodes, alkaline battery electrodes, etc., to achieve the effects of high ionic conductivity, suppression of damage, and high lithium storage capacity

Inactive Publication Date: 2006-08-09
INST OF PHYSICS - CHINESE ACAD OF SCI
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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 that can help to form a solid that will not deteriorate the kinetic behavior and high-current performance of the electrode material, will not increase the cost of battery manufacturing, limit the operating temperature range, and prevent the electrolyte from reducing and decomposing. Electrolyte membranes, and electrode composites that address electrode spalling and failure

Method used

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  • Nanometer metal or alloy composite material and preparation and usage thereof
  • Nanometer metal or alloy composite material and preparation and usage thereof
  • Nanometer metal or alloy composite material and preparation and usage thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1, using preparation method one (electroless plating method) to prepare Ag / graphitized mesophase carbon pellets (hereinafter referred to as GMCMB) composite material

[0048] Ag 0.1 / GMCMB 0.9 Preparation of the composite material: (1) Weigh 0.85 grams of silver nitrate and put it into 20 milliliters of anhydrous ethylene glycol to heat and dissolve to form solution 1; (2) Weigh 5 grams of graphitized mesophase carbon pellets and put them into 20 milliliters of ethylene glycol Alcohol and 1,3 propanediol (volume ratio: 1:1) in the mixed solution, stir and mix evenly, then heat to 160 degrees, add the solution 1 obtained in step 1, continue to reflux at 130 degrees for 14 hours and then cool naturally, during the heating and reflux process (3) the black suspension obtained in step 2 is filtered, first rinsed several times with ethylene glycol, and then rinsed with ethanol, and the black substance obtained is in a hollow oven at 100 degrees. After drying for ...

Embodiment 11

[0051] Example 11. Cu / petroleum coke (hereinafter referred to as PC) composite material was prepared by preparation method 2 (self-reduction method).

[0052] Cu 0.05 / PC 0.95Preparation of the composite material: Weigh 0.8 g of copper sulfate and dissolve it in 10 ml of distilled water, add 5 g of petroleum coke particles and stir to form a black slurry. Put the obtained slurry into a tube furnace and heat it up to 800 degrees at 5 degrees per minute, then keep it warm for 2 hours, and take it out after natural cooling for use. During the calcination process, there is always argon protection.

[0053] The nanometer metal or alloy / electrode active material composite material in this example is used in the method of Example 1 to prepare an electrode and assemble it into an experimental battery. The electrolyte solution is a mixed solution of ethylene carbonate and dimethyl carbonate with a volume ratio of 1:1 dissolved in lithium hexafluorophosphate at 1 mol / liter. Other ma...

Embodiment 21

[0055] Example 21. Preparation of Al / natural graphite powder (hereinafter referred to as NG) composite material by preparation method three (chemical vapor deposition method)

[0056] Al 0.2 / NG 0.8 Preparation of composite materials: In a chemical vapor deposition furnace, organic aluminum butylaluminum is used as a precursor, argon is used as a carrier gas, and natural graphite particles are used as a deposition substrate. The deposition temperature is 400 degrees and the deposition time is 15 minutes.

[0057] The nanometer metal or alloy / electrode active material composite material in this example is used in the method of Example 1 to prepare an electrode and assemble it into an experimental battery. Other materials, structures, assembly and testing methods in the battery are the same as those in Embodiment 2.

[0058] Embodiment 22~30, use the same method as embodiment 21 to obtain nine kinds of different composite materials, the test conditions are the same as embodime...

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Abstract

The invention relates to a compound material of millimicron metal or alloy / electrode active substance, comprising: millimicron metal or alloy and electrode active substance; millimicron metal or particle of alloy takes up 0.02~30 wt% of electrode active substance. The compound material is negative electrode active material of secondary lithium battery, cooperating with of metal oxide containing lithium, organic electrolyte solution, diaphragm, battery shell, and afflux agent and lead, to form secondary lithium battery. The electrode active substance of compound material supplies rigid skeleton structure and center for inlaying lithium, helps the formation of solid electrolyte layer on the surface of electrode active substance which has excellent ion conducting power; can avoid destruction to lamellar structure of graphite, stop unit of millimicron material effectively and increase periodicity and capacity of discharge and discharge with large current. The a secondary lithium battery has excellent abilities of circulation and safety, suitable for the place needing fairly high energy density.

Description

technical field [0001] The present invention relates to an electrode composite material, in particular to a composite material composed of a nanometer metal or alloy and an electrode active material as a surface solid electrolyte membrane forming accelerator, a preparation method thereof, and its application in a secondary lithium battery application. 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 the electrode ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/38H01M4/58H01M4/04H01M4/24H01M4/36H01M4/583H01M10/24
CPCY02E60/124Y02E60/10
Inventor 吴晓东陈立泉黄学杰
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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