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Oxycobalt hydroxide particulate powder and manufacturing method therefor

A cobalt oxide, hydrogen oxide technology, applied in cobalt oxide/cobalt hydroxide, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as unstable crystal structure, achieve small BET specific surface area value, inhibit battery expansion, thermal Stability-enhancing effect

Active Publication Date: 2013-08-21
TODA IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, due to repeated charge and discharge reactions, the crystal structure becomes unstable, causing oxygen release or reaction with the electrolyte, etc.

Method used

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  • Oxycobalt hydroxide particulate powder and manufacturing method therefor
  • Oxycobalt hydroxide particulate powder and manufacturing method therefor
  • Oxycobalt hydroxide particulate powder and manufacturing method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1－1

[0175]

[0176] In a reactor with an effective volume of 10L equipped with flow tubes, baffles, and blade-type agitators, add 8L of ion-exchanged water, adjust the temperature to 50°C while fully stirring, and feed enough oxygen-containing gas from the lower part of the reactor. A 4 mol / l sodium hydroxide aqueous solution was added dropwise to make pH = 12.5. A 1.5 mol / l cobalt sulfate aqueous solution was continuously supplied to the reactor at an average supply rate of 0.025 mol / (l·hr). Simultaneously, a 4 mol / l sodium hydroxide aqueous solution was continuously supplied so that pH=12.5. The rapidly oxidized cobalt oxyhydroxide particles overflow from the upper part of the reactor, concentrate in a 0.4L concentrator connected to the overflow pipe, circulate to the reactor, and react until the concentration of cobalt oxyhydroxide particles in the reactor is Up to 15mol / l.

[0177] After the reaction, the taken-out suspension was washed with water using a filter press, and...

reference example 1－2

[0192]

[0193] The cobalt oxyhydroxide particle powder obtained in Comparative Example 1-4 and the lithium compound were mixed sufficiently in a predetermined amount so that the molar ratio of lithium / cobalt was 1.00, and the mixed powder was fired at 1000° C. for 10 hours in an oxidizing atmosphere, Lithium cobaltate particle powder was obtained.

[0194] As a result of X-ray diffraction of the obtained lithium cobaltate particle powder, it is a single phase of lithium cobaltate, and no impurity phase exists. In addition, the average particle size is 13.6μm, the frequency is 9.4%, and the BET specific surface area value is 0.26m 2 / g, compressed density CD (2.5ton / cm 2 ) is 3.65g / cm 3 .

[0195] A button-type battery made of the above-mentioned positive electrode active material with a density of 3.40 g / cm 3 , The initial efficiency is 94%, the ratio characteristic (1c / 0.1c) is 92%, and the capacity retention rate of 11 cycles is 90%.

[0196] Next, Examples 2-1 to 2-...

Embodiment 2－1

[0240]

[0241] In a reactor with an effective volume of 10L equipped with flow tubes, baffles, and blade-type agitators, add 8L of ion-exchanged water, adjust the temperature to 50°C while fully stirring, and feed enough oxygen-containing gas from the lower part of the reactor. A 4 mol / l sodium hydroxide aqueous solution was added dropwise to make pH = 12.5. A 1.5 mol / l cobalt sulfate aqueous solution was continuously supplied to the reactor at an average supply rate of 0.025 mol / (l·hr). Simultaneously, a 4 mol / l sodium hydroxide aqueous solution was continuously supplied so that pH=12.5. The rapidly oxidized cobalt oxyhydroxide particles overflow from the upper part of the reactor, concentrate in a 0.4L concentrator connected to the overflow pipe, circulate to the reactor, and react until the concentration of cobalt oxyhydroxide particles in the reactor is Up to 15mol / l.

[0242] After the reaction, the taken-out suspension was washed with water using a filter press, and...

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Abstract

The present invention relates to cobalt oxyhydroxide particles and lithium cobaltate particles which have a high density and a uniformly grown crystal structure. These objects of the present invention can be achieved by cobalt oxyhydroxide particles having an average secondary particle diameter (D50) of 3.0 to 25.0 [mu]m, a BET specific surface area (BET) of 0.1 to 20.0 m 2 / g, a tap density (TD) of 1.0 to 3.5 g / cm 3 in which the average secondary particle diameter (D50) and the BET specific surface area (BET) of the cobalt oxyhydroxide particles satisfy the relational formula; and by lithium cobaltate particles having an average secondary particle diameter (D50) of 15.0 to 25.0 [mu]m, a specific surface area (BET) of 0.10 to 0.30 m 2 / g, a compressed density (CD; as measured by applying a pressure of 2.5 t / cm 2 thereto) of 3.65 to 4.00 g / cm 3 . The cobalt oxyhydroxide particles are useful as a precursor of a positive electrode active substance (lithium cobaltate particles) used in a non-aqueous electrolyte secondary battery, and the lithium cobaltate particles are useful as a the positive electrode active substance used in a non-aqueous electrolyte secondary battery.

Description

[0001] This application was filed on March 26, 2009 with the application number 200980104913.5, and the title of the invention is "cobalt oxide hydroxide particle powder and its manufacturing method, lithium cobaltate particle powder and its manufacturing method, and the use of the lithium cobaltate particle powder. A divisional application of the patent application for "Non-aqueous Electrolyte Secondary Battery". technical field [0002] The invention relates to cobalt oxyhydroxide particle powder with high density and uniform crystal growth. The cobalt oxyhydroxide particle powder of the present invention is effective as a precursor of a positive electrode active material (lithium cobaltate particle powder) used in a non-aqueous electrolyte secondary battery. [0003] In addition, the present invention relates to lithium cobaltate particle powder with high density and uniform crystal growth. The lithium cobaltate particle powder of the present invention can be effectively u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/52C01G51/04H01M4/48H01M10/36
CPCC01G51/04C01G51/42C01P2002/52C01P2002/60C01P2002/72C01P2002/88C01P2004/03C01P2004/51C01P2004/61C01P2004/62C01P2006/10C01P2006/11C01P2006/12C01P2006/40H01M4/131H01M4/1391H01M4/485H01M4/525H01M10/052Y02E60/10
Inventor 小尾野雅史藤田胜弘冈崎精二本田知广西尾尊久藤本良太平本敏章佐藤幸太伊藤亚季乃冲中健二藤野昌市西本一志上神雅之森田大辅梶山亮尚
Owner TODA IND
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