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Method for producing a lithium battery material, materials and lithium battery

A battery and electrode technology, applied in the field of devices including batteries and lithium batteries according to the present invention, can solve problems such as fluorine and carbon loss, and achieve the effect of improving electrochemical performance

Inactive Publication Date: 2018-08-31
UNIV CLERMONT AUVERGNE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This decomposition produces the perfluorinated volatile species CF 4 、C 2 f 6 and consequent loss of fluorine and carbon

Method used

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  • Method for producing a lithium battery material, materials and lithium battery
  • Method for producing a lithium battery material, materials and lithium battery
  • Method for producing a lithium battery material, materials and lithium battery

Examples

Experimental program
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Effect test

example 1

[0065] Example 1: Example of implementing the method of the present invention

[0066]In said first example, 200 mg of nanofibers (from the company MER, under the commercial reference MRCSD) were placed in a nickel basket positioned in the center of a one-liter passivated nickel reactor to pass through dynamic fluorination (F 2 gas flow in an open reactor) to be fluorinated.

[0067] Dynamic fluorination of pure gaseous molecular fluorine F at a temperature Tf of 420°C 2 It was carried out under flow at a flow rate of 25-30 mL / min for 180 minutes.

[0068] The obtained material had an atomic specific velocity F / C of 0.31 as determined by NMR.

[0069] The material has been milled by a Retsch PM100 (trademark) planetary ball mill in a 50 mL stainless steel vessel with four 10 mm diameter stainless steel balls under an argon atmosphere at a grinding speed of 350 rpm for 9 minutes and 1 minute stop. Hour.

[0070] These experiments were repeated with different CFx materials, ...

example 2

[0077] Example 2: Examples of configurations of electrochemical cells that can be used to practice materials of the invention

[0078] The material obtained according to Example 1 was suspended in a stirrer with a glass vessel by mixing 10% by weight of polyvinylidene fluoride (PVDF) in a propylene carbonate liquid medium.

[0079] The suspension is then deposited on approximately 1 cm of a stainless steel electrode plate heated to 80°C 2 Apparently, the plate was then evacuated under low vacuum at 120° C. for one hour. 50 mg of cathode material CFx / PVDF 90 / 10 were obtained.

[0080] The mass of the plate is then estimated to be between 2 and 5 mg. The plates were returned to the glove box and incorporated into a laboratory lithium battery consisting of lithium metal and a Kargold (registered trademark) microporous separator, filled with LiPF 6 Wetting with PC / EC / 3 DMC 1M electrolyte, as attached Figure 4 shown in . The laboratory cell was a 12 mm internal diameter 304L ...

example 3

[0091] Example 3: Examples of materials obtained according to the method of the invention and comparison with corresponding materials of the prior art

[0092] The examples present different experiments carried out on different materials obtained according to the method of the invention. In particular, the materials tested in this example were obtained using the method of the invention as described in example 1, and the electrochemical performance was measured using the apparatus as described in example 2.

[0093] The potential change is then measured as a function of time. The duration is multiplied by the current density so that the capacity is determined. In 3 electrochemical tests carried out on the material, capacities of 970mAh / g, 1684mAh / g and 2339mAh / g were obtained. The "theoretical" capacity of said material, corresponding to the capacity measured on the fluorinated carbon nanofibrous material used to carry out the method of the invention, ie before grinding, was ...

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Abstract

The invention relates to a method for producing a lithium battery material with improved electrochemical characteristics, to materials that can be produced by the method according to the invention, toan electrode comprising a material according to the invention, to a battery, especially a lithium battery, comprising a material according to the invention, and to devices comprising a lithium battery according to the invention. The invention is particularly applicable to the production of lithium batteries.

Description

technical field [0001] The invention relates to a method for producing a material for a lithium battery, a material obtainable by the method according to the invention, a battery, in particular a lithium battery, comprising a material according to the invention, and a battery comprising a material according to the invention , especially lithium battery devices. [0002] In the following description, reference numbers between square brackets ([]) refer to the list of references given at the end of the article. Background technique [0003] It is a scientific and industrial need to further improve the electrochemical performance of batteries, especially lithium batteries, in order to obtain greater capacity, energy, power and lifetime, especially in the current economic and ecological environment. [0004] Targeting capacity, the strategy of some market competitors is to increase the fluorination rate x in CFx in order to reach or even slightly exceed CF 1 , the precursor is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/00H01M4/587H01M10/052H01M6/16C01B32/05H01M4/583
CPCC01B32/10C01B32/168H01M4/5835H01M4/587H01M6/16H01M10/052H01M2220/30Y02E60/10
Inventor 马克·杜波依斯卡提亚·格林·阿劳约·达·希尔瓦埃洛迭·迪萨圣顿
Owner UNIV CLERMONT AUVERGNE
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