Tervalence cobalt compounds production and lithium cobalt oxide production method using same

A hydroxide, trivalent cobalt technology, applied in cobalt compounds, chemical instruments and methods, inorganic chemistry and other directions, can solve the problems affecting the electrochemical performance of lithium cobaltate, long calcination time, high temperature, and achieve good nickel removal effect, The effect of short calcination time and high electrochemical activity

Inactive Publication Date: 2008-04-16
孔令树
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Throughout the various manufacturing methods of lithium cobalt oxide, almost all of them are complicated
Since cobalt exists as divalent in general compounds, and trivalent cobalt works in lithium cobalt oxide, it needs to be oxidized during the calcination process, and it is very difficult to carry out this oxidation completely, resulting in the calcination time. Long, high temperature, cannot be crystallized at the optimum crystallization temperature of lithium cobalt oxide, which affects the electrochemical performance of lithium cobalt oxide

Method used

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  • Tervalence cobalt compounds production and lithium cobalt oxide production method using same
  • Tervalence cobalt compounds production and lithium cobalt oxide production method using same
  • Tervalence cobalt compounds production and lithium cobalt oxide production method using same

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Embodiment Construction

[0081] Using the cobalt manganese material recovered from the waste liquid in the PTA production of the Yangzi Group Chemical Plant as the raw material, a laboratory preparation of lithium cobalt oxide was carried out in a fine chemical plant in Pukou District. The specific method is as follows:

[0082] 1. Acid dissolution: Dissolve the cobalt-manganese material in a plastic bucket with industrial sulfuric acid at pH=2 and remove the organic residue insoluble in dilute acid to obtain CoSO 4 MnSO 4 mixture.

[0083] 2. Ammonification: put 10% ammonia water (calculated excess) in a plastic bucket, and COSO 4 , MnSO 4 The mixed supernatant was slowly added to the ammonia water.

[0084] 3. Separation: Use a filter bag to separate Mn(OH) 2 The precipitate was filtered out, and then an appropriate amount of Na was added to the clear liquid 2 CO 3 Make slightly soluble Mn in ammonia water 2+ MnCO 3 Precipitate out.

[0085] 4. Oxidation: Put the above-mentioned clear liqu...

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Abstract

The invention relates to a process for preparing cobalt (III) compound which comprises, (1) acid dissolving, (2) ammonified separation, (3) oxidization, (4) nickel removal, (5) alkalized heat depositing, (6) separation through washing. The invention also discloses the process for synthesizing LiCoO2 by using the cobalt (III) compound, which comprises mixing the cobalt (III) compound directly with lithium, drying and calcining, finally disintegrating and packaging.

Description

technical field [0001] The invention relates to a method for preparing trivalent cobalt oxides and hydroxides by using metal cobalt or cobalt-containing scraps as raw materials, and using the trivalent cobalt oxides and hydroxides as lithium cobaltate precursors to produce lithium cobaltate method. Background technique [0002] Lithium-ion batteries have special advantages such as high working voltage, high specific energy, large capacity, small self-discharge, good cycle performance, long service life, light weight, and small size. They are ideal power sources for notebook computers, mobile phones, and portable devices. It is expected to become one of the main power sources for electric vehicles and cordless electric tools in the future. [0003] The excellent electrochemical performance of lithium-ion batteries is mainly determined by the materials used. Lithium-ion battery anode materials play a decisive role in lithium-ion batteries. At present, almost all the positive ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G51/00
Inventor 孔令树
Owner 孔令树
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