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Preparation method for lithium-ion battery anode material

A technology for lithium-ion batteries and negative electrode materials, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as unsatisfactory cycle performance, low specific capacity of carbon materials, and large volume expansion

Inactive Publication Date: 2012-11-14
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with the metal lithium used in the early stage, the above materials have been greatly improved in terms of safety and cycle performance, but each still has some insurmountable shortcomings, such as the low specific capacity of carbon materials; the first charge and discharge of metal oxides Low efficiency; Alloy materials have a large volume expansion during lithium intercalation, and the cycle performance is not very ideal, etc.

Method used

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  • Preparation method for lithium-ion battery anode material
  • Preparation method for lithium-ion battery anode material
  • Preparation method for lithium-ion battery anode material

Examples

Experimental program
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Effect test

experiment example 1

[0017] Utilize reflux method to prepare lithium pyridinedicarboxylate powder of negative electrode material of lithium ion battery, concrete steps are as follows:

[0018] (1) First, add 0.167g (1mmol) of 2,6-pyridinedicarboxylic acid and 0.088g (2.1mmol) of LiOH·H to a 250mL three-neck flask 2 O powder, then add 100mL ethanol;

[0019] (2) Then, place the three-necked bottle in an oil bath at 70°C for a constant temperature reaction for 48 hours;

[0020] (3) The final product is filtered, washed and dried to obtain lithium 2,6-pyridinedicarboxylate as the negative electrode material for lithium ion batteries.

experiment example 2

[0022] Utilize reflux method to prepare lithium pyridinedicarboxylate powder of negative electrode material of lithium ion battery, concrete steps are as follows:

[0023] (1) First, add 0.167g (1mmol) of 2,5-pyridinedicarboxylic acid and 0.084g (2.0mmol) of LiOH·H to a 250mL three-necked flask 2 O powder, then add 100mL ethanol;

[0024] (2) Then, place the three-necked bottle in an oil bath at 70°C for a constant temperature reaction for 48 hours;

[0025] (3) The final product is filtered, washed and dried to obtain lithium 2,5-pyridinedicarboxylate as the negative electrode material for lithium ion batteries.

experiment example 3

[0027] Utilize reflux method to prepare lithium pyridinedicarboxylate powder of negative electrode material of lithium ion battery, concrete steps are as follows:

[0028] (1) First, add 0.167g (1mmol) of 3,4-pyridinedicarboxylic acid and 0.092g (2.2mmol) of LiOH·H to a 250mL three-necked flask 2 O powder, then add 100mL ethanol;

[0029] (2) Then, place the three-necked bottle in an oil bath at 70°C for a constant temperature reaction for 48 hours;

[0030] (3) The final product is filtered, washed and dried to obtain lithium 3,4-pyridinedicarboxylate as the negative electrode material for lithium ion batteries.

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Abstract

The invention relates to a lithium-ion battery anode material and discloses a preparation method for the lithium-ion battery anode material. The preparation method I is using dipicolinic acid and LiOH.H2O to prepare pyridinium lithium carboxylate through a reflow reaction method; the preparation method II is using dipicolinic acid and inorganic salt containing Li<+> to prepare pyridinium lithium dicarboxylate in a reaction kettle through a hydrothermal method. The preparation method has a simple process, is convenient and easy to operate, and is extensive in material source.

Description

technical field [0001] The invention relates to a negative electrode material of a lithium ion battery, in particular to a preparation method of the negative electrode material of a lithium ion battery. The negative electrode material of the lithium ion battery is a lithium pyridinedicarboxylate polymer. Background technique [0002] Lithium-ion batteries are widely used in information, transportation, national defense and military fields due to their high energy density, long life, no memory effect, and small self-discharge. As a key part of lithium-ion batteries, anode materials have become one of the focuses of research and development in the field of energy storage materials at home and abroad. The negative electrode materials mainly include carbon materials, metal oxides and alloy materials. Compared with the metal lithium used in the early stage, the above materials have been greatly improved in terms of safety and cycle performance, but each still has some insurmount...

Claims

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Application Information

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IPC IPC(8): H01M4/587
CPCY02E60/12Y02E60/10
Inventor 苟蕾张红霞李东林樊小勇李严
Owner CHANGAN UNIV
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