Powder of lithium complex compound particles, method for producing the same, and nonaqueous electrolyte secondary cell

一种制造方法、化合物的技术，应用在非水电解质蓄电池、二次电池、镍化合物等方向，能够解决电阻上升、电池特性劣化等问题，达到提高涂装性、高温保存特性优异、循环特性良好的效果

Active Publication Date: 2011-11-09
TODA IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when carbonation occurs, carbon dioxide gas is generated by a reaction inside the battery, and the battery expands, thereby deteriorating battery characteristics.
In addition, if sulfate, etc. are present, the resistance will increase during storage

Method used

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  • Powder of lithium complex compound particles, method for producing the same, and nonaqueous electrolyte secondary cell
  • Powder of lithium complex compound particles, method for producing the same, and nonaqueous electrolyte secondary cell
  • Powder of lithium complex compound particles, method for producing the same, and nonaqueous electrolyte secondary cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0117] Lithium hydroxide is mixed with hydroxide containing cobalt, nickel, and aluminum so that the ratio of Li / (Ni+Co+Al) is 1.08, and fired at 750°C for 20 hours in an oxygen atmosphere to obtain lithium composite compound particles . 60 g of pulverized lithium composite compound particles were suspended in 300 ml of pure water at a water temperature of 10° C., stirred for 20 minutes, and then filtered and washed.

[0118] After drying overnight at 120°C, crush again, after decarbonation (CO 2 Heat treatment at 850° C. for 2 hours in an oxygen atmosphere with a concentration of 20 ppm).

[0119] The obtained lithium composite compound particle powder was evaluated by a time-of-flight secondary ion mass spectrometer as the ionic strength ratio A(LiO - / NiO 2 - ) is 0.04, the ionic strength ratio B(Li 3 CO 3 + / Ni + ) is 3.8, the ionic strength ratio C(LiSO 3 - / NiO 2 - ) is 0.07. After embedding the obtained particles in resin, after performing FIB processing, i...

Embodiment 2

[0121] The powder obtained by mixing Li / (Ni+Co+Al) at a ratio of 1.02 and treating it in the same manner as in Example 1 was washed, dried, and heat-treated at 800°C in an oxygen atmosphere after decarbonation (concentration: 20ppm) 2 hours.

Embodiment 3

[0123] The powder obtained by mixing Li / (Ni+Co+Al) at a ratio of 1.02 and treating it in the same manner as in Example 1 was washed, dried, and heat-treated at 800°C in an air atmosphere after decarbonation (concentration: 20ppm) 2 hours.

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Abstract

Provided is a powder of lithium complex compound particles, wherein when the particle surface of the powder of lithium complex compound particles represented byLi1+xNi1-y-zCoyMzO2(M=B, Al)is analyzed using a time-of-flight secondary ion mass spectrometer, the ionic strength ratio A (LiO- / NiO2 -) is 0.3 or less and the ionic strength ratio B (Li3CO3 + / Ni+) is 20 or less. The powder of lithium complex compound particles can be used as the positive electrode active material of a secondary cell having good cycle properties and excellent high-temperature shelf life.

Description

technical field [0001] The present invention provides a lithium composite compound particle powder having good cycle characteristics as a positive electrode active material of a secondary battery and excellent high-temperature storage characteristics, and a secondary battery using the lithium composite compound particle powder. Background technique [0002] In recent years, electronic devices such as AV equipment and personal computers have become increasingly portable and cordless, and there is an increasing demand for small, light-weight secondary batteries with high energy density as their driving power sources. In addition, in recent years, electric vehicles and hybrid vehicles have been developed and put into practical use in consideration of the global environment, and there is an increasing demand for lithium secondary batteries with excellent storage characteristics for large-scale applications. Under such circumstances, lithium ion secondary batteries having advanta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00C01B35/12H01M4/525H01M10/052H01M10/0566
CPCY02E60/122C01P2004/04H01M10/0566H01M4/1391C01P2002/52C01P2002/72C01G53/42H01M4/525H01M10/052C01P2004/61C01P2006/80C01P2006/12C01P2006/40Y02E60/10C01B35/12C01G53/00H01M10/0525H01M2220/20H01M2220/30Y02T10/70Y02P70/50
Inventor 渡边浩康今桥大树菊谷和彦田上畅之贞村英昭
Owner TODA IND
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