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Method for preparing anode material gamma-LiV2O5 of lithium ion battery

A cathode material, lithium battery technology, applied in the field of γ-LiV2O5 synthesis, can solve the problems of long time, limited output, unsuitable for mass production, etc., and achieves the effects of low cost, short holding time and low production cost

Inactive Publication Date: 2009-09-09
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(4) Hydrothermal method: The product obtained by this method is accurate in measurement, but requires high-pressure equipment, takes a long time, and the output is limited, so it is not suitable for mass production

Method used

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  • Method for preparing anode material gamma-LiV2O5 of lithium ion battery
  • Method for preparing anode material gamma-LiV2O5 of lithium ion battery
  • Method for preparing anode material gamma-LiV2O5 of lithium ion battery

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Experimental program
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Effect test

Embodiment 1

[0027] (1) γ-LiV 2 o 5 powder preparation

[0028] 86.7g of analytically pure V 2 o 5 , 60g analytically pure LiBr·H 2 O. 200ml of absolute ethanol was mixed with polytetrafluoroethylene balls for 8 hours (i.e. LiBr·H 2 O excess 20wt%), the slurry was heated in a 90°C water bath until the absolute ethanol escaped to obtain a pasty slurry. Then it was dried in vacuum at 120° C. for 4 hours, and a gray-green powder was obtained after passing through a 100-mesh sieve. The gray-green powder was calcined at 600°C for 4 hours in flowing argon, and passed through a 100-mesh sieve after grinding to obtain γ-LiV 2 o 5 powder. Br produced during the preparation 2 Steam can be absorbed by tap water. All sieving operations were carried out in a glove box filled with dry air to avoid moisture absorption of the powder.

[0029] (2) γ-LiV 2 o 5 High temperature cathode discharge test

[0030] Simulated Li-B / LiCl-KCl / γ-LiV 2 o 5 Discharge test of sheet-type cells at 500°C. Li...

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Abstract

This invention provides one method to process lithium battery enode gamma-LiVO, which comprises the following steps: mixing the chemical metering vanadium and lithium source and solvent ball and heating slurry; then processing vacuum drying through bursting and grinding to get gamma-LiVO powder; adding eutectic melting into gamma-LiVO powder for mixture; under argon gas protection and rapid cooling to get gamma-LiVO anode.

Description

technical field [0001] The present invention is related to lithium thermal battery and lithium ion secondary battery positive electrode material, particularly relates to γ-LiV 2 o 5 synthetic method. Background technique [0002] The most commonly used cathode material for lithium thermal batteries is iron disulfide, which has high specific capacity and stable discharge voltage. However, iron disulfide has two fatal weaknesses. One is severe thermal decomposition at 550°C, resulting in large capacity loss; the other is its dissolution in the electrolyte, resulting in loss of battery capacity and easy short circuit of the battery. At the same time, its low discharge voltage affects the specific power and specific energy of the thermal battery. . [0003] V 2 o 5 The positive electrode material used in lithium ion secondary batteries has a relatively high open circuit voltage and reversible lithium ion intercalation / deintercalation characteristics, and has great potentia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/48H01M4/58C01D15/00C01G31/00H01M4/485
CPCY02E60/10
Inventor 李志友曹笃盟周科朝刘志坚
Owner CENT SOUTH UNIV
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