Positive-electrode composition for a nonaqueous-electrolyte secondary battery and method for manufacturing a positive-electrode slurry using said positive-electrode composition

一种非水电解液、二次电池的技术，应用在二次电池、电池电极、电路等方向，能够解决输出特性降低、成本降低等问题，达到输出特性提高、生产效率改善、改善制造效率的效果

Active Publication Date: 2013-02-27
NICHIA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Furthermore, there are also LiNi 0.5 co 0.2 mn 0.3 o 2 In such a substance, the proportion of Co is reduced, the cost is reduced, and the proportion of Ni is increased, the discharge capacity is improved. However, in general, the proportion of Co is decreased, and the output characteristics are inevitably reduced.

Method used

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  • Positive-electrode composition for a nonaqueous-electrolyte secondary battery and method for manufacturing a positive-electrode slurry using said positive-electrode composition
  • Positive-electrode composition for a nonaqueous-electrolyte secondary battery and method for manufacturing a positive-electrode slurry using said positive-electrode composition
  • Positive-electrode composition for a nonaqueous-electrolyte secondary battery and method for manufacturing a positive-electrode slurry using said positive-electrode composition

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Embodiment 1

[0045] Pure water in a stirred state was prepared in the reaction tank, and nickel sulfate aqueous solution, cobalt sulfate aqueous solution, and manganese sulfate aqueous solution were added dropwise at a flow ratio of Ni:Co:Mn=5:2:3 in molar ratio. After the dropwise addition, set the liquid temperature to 65° C., and add a certain amount of aqueous sodium hydroxide solution dropwise to obtain nickel / cobalt / manganese co-precipitated hydroxide. Wash the obtained co-precipitated hydroxide with water, filter and separate, and mix lithium carbonate and zirconia (IV) so that Li:(Ni+Co+Mn):Zr=1.10:1:0.005 to obtain a mixed raw material. The obtained mixed raw material was fired at 850° C. for 2.5 hours in an air atmosphere, and then fired at 900° C. for 4.5 hours to obtain a sintered body. The obtained sintered body is pulverized and applied on a dry sieve to obtain the composition formula Li 1.10 Ni 0.5 co 0.2 mn 0.3 Zr 0.005 o 2 Indicates the positive active material. The...

Embodiment 2

[0048] A positive electrode composition was obtained in the same manner as in Example 1, except that tungsten (VI) oxide as additive particles was mixed in a ratio of (Ni+Co+Mn+Zr):W=1:0.002.

Embodiment 3

[0050] A positive electrode composition was obtained in the same manner as in Example 1, except that tungsten (VI) oxide as additive particles was mixed in a ratio of (Ni+Co+Mn+Zr):W=1:0.003.

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Abstract

Disclosed is a positive-electrode composition that improves output characteristics, is low-cost, is easy to handle when fabricating positive electrodes, and has improved yield. Said positive-electrode composition, which is used in positive electrodes, comprises: a positive-electrode active material comprising a lithium / transition-metal composite oxide represented by the general formula Li[1+x]NiyCozM[1-y-z-w]LwO2 (with 0<=x<=0.50, 0.30<=y<=1.0, 0<=z<=0.5, 0<=w<=0.1, 0.30<y+z+w<=1, M being manganese and / or aluminum, and L being at least one element selected from the group comprising zirconium, titanium, magnesium, and tungsten); and a particulate additive comprising acidic oxide particles.

Description

technical field [0001] The present invention relates to a positive electrode composition for nonaqueous electrolyte secondary batteries such as lithium ion secondary batteries. In particular, it is related with the positive electrode composition which can improve the output characteristic of a lithium ion secondary battery, and can improve the viscosity stability of a positive electrode slurry. Moreover, it also relates to the manufacturing method of the positive electrode slurry which improved the viscosity stability. Background technique [0002] In recent years, with the popularization and miniaturization of portable devices such as VTRs, mobile phones, and notebooks, non-aqueous electrolyte secondary batteries such as lithium-ion secondary batteries have gradually been used as their power sources. Moreover, from the perspective of coping with recent environmental problems, it is also attracting attention as a power battery for electric vehicles and the like. [0003] G...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525H01M4/131H01M4/505H01M4/62
CPCY02E60/12H01M4/505Y02E60/122H01M4/525Y02E60/50Y02E60/10H01M4/131H01M4/1391H01M4/463H01M4/466H01M4/62H01M10/0525
Inventor 河井健太大石宪吾贞益久人木内千佳吉田泰弘
Owner NICHIA CORP
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