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Lithium ion battery cathode active material and its preparation method

A negative electrode active material, lithium-ion battery technology, applied in the direction of battery electrodes, circuits, electrical components, etc., to achieve the effect of convenient operation, easy operation, and wide source of raw materials

Inactive Publication Date: 2015-07-01
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2007, the Tarascon research group made a MOFs material FeIII(OH) for the first time 0.8 f 0.2 (BDC)·H 2 O(MIL-53(Fe)) is used as the positive electrode material of lithium-ion batteries, but the specific discharge capacity of the material is only 75mAh g -1

Method used

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  • Lithium ion battery cathode active material and its preparation method
  • Lithium ion battery cathode active material and its preparation method
  • Lithium ion battery cathode active material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0027] Weigh 0.105g terephthalic acid, 0.375g cobalt nitrate hexahydrate (1:2 molar ratio), 30ml DMF, 20ml absolute ethanol and 10ml distilled water (3:2:1 volume ratio) PTFE-lined stainless steel reactor. The reaction kettle was placed in a programmable temperature-controlled oven, and after being kept at 110°C for 2.75 days, the temperature was lowered to room temperature at a rate of 3°C / h, filtered, and dried to obtain 0.182 g of cobalt terephthalate powder.

experiment example 2

[0029] Weigh 0.105g terephthalic acid, 0.375g cobalt nitrate hexahydrate (1:2 molar ratio), 30ml DMF, 20ml absolute ethanol and 10ml distilled water (1:1:1 volume ratio) PTFE-lined stainless steel reactor. The reaction kettle was placed in a programmable temperature-controlled oven, and after being kept at 130°C for 2.75 days, the temperature was lowered to room temperature at a rate of 3°C / h, filtered, and dried to obtain 0.181 g of cobalt terephthalate powder.

experiment example 3

[0031] Weigh 0.105g of terephthalic acid, 0.375g of cobalt nitrate hexahydrate (molar ratio 1:2), 20ml of DMF, 20ml of absolute ethanol and 20ml of distilled water (volume ratio of 1:1:1) in a 100mL belt at room temperature PTFE-lined stainless steel reactor. The reaction kettle was placed in a programmable temperature-controlled oven, and after being kept at 110°C for 2.75 days, the temperature was lowered to room temperature at a rate of 3°C / h, filtered, and dried to obtain 0.223 g of cobalt terephthalate powder.

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Abstract

The invention discloses a lithium ion battery cathode active material and its preparation method. The material is pink terephthalic cobalt powder, and its molecular formula is Co2(OH)2(C8H4O4). The preparation method adopts a solvothermal technique for one-step synthesis, and has the advantages of simple process, convenient and feasible operation, and wide raw material sources. Compared with traditional carbon cathode materials, the material provided in the invention has higher specific capacity and good cycle performance.

Description

technical field [0001] The invention relates to a lithium ion battery negative electrode active material, in particular to a novel organic-inorganic hybrid polymer lithium ion battery negative electrode active material and a preparation method thereof. Background technique [0002] Lithium-ion batteries are key energy storage devices for portable consumer electronics and new energy industries including electric vehicles, and their performance is closely related to electrode materials. At present, carbon materials are generally used as anode materials for commercial lithium-ion batteries, but because of their theoretical specific capacity of only 372mAh / g, the further improvement of the specific capacity of lithium-ion batteries is limited, and it cannot meet the needs of the growing high-energy energy storage system; and Carbon materials have poor chemical stability in electrolytes, and there are potential safety hazards. In order to overcome the shortcomings of carbon mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/60
CPCY02E60/10
Inventor 苟蕾郝丽敏李东林樊小勇许磊张红霞
Owner CHANGAN UNIV
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