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Positive electrode active material for non-aqueous electrolyte secondary battery and manufacturing method thereof, and non-aqueous electrolyte secondary battery using same

A positive electrode active material and a non-aqueous electrolyte technology, which is applied to the positive electrode active material for non-aqueous electrolyte secondary battery and its preparation and the field of the non-aqueous electrolyte secondary battery, can solve the problems such as the reduction of the production efficiency of the positive electrode active material, Achieve the effect of reducing internal resistance, high life performance and stable preparation

Active Publication Date: 2007-10-03
SUMITOMO METAL MINING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the production efficiency of the positive electrode active material will decrease, which is not ideal

Method used

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  • Positive electrode active material for non-aqueous electrolyte secondary battery and manufacturing method thereof, and non-aqueous electrolyte secondary battery using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] In LiNiO 2 In composite oxides, LiNi can be synthesized by substituting Co for 15at% Ni and Al for 3at% Ni 0.82 co 0.15 Al 0.03 o 2 . The at% herein means atomic %.

[0096] First, sodium hydroxide and ammonia are supplied to an aqueous solution in which nickel sulfate, cobalt sulfate and aluminum sulfate are dissolved, and a metal composite hydroxide is obtained by a co-precipitation method, wherein the molar ratio of nickel, cobalt and aluminum existing in the form of solid solution is 82:15:3. The metal composite hydroxide includes spherical secondary particles formed by aggregating a plurality of primary particles having a diameter of 1 μm or less. The tap density of obtained metal composite hydroxide is 1.72g / cm 3 .

[0097] Metal composite hydroxide and lithium hydroxide monohydrate (manufactured by FMC Corporation) for industrial use were weighed so that the ratio of the total number of moles of metals other than lithium (Ni, Co, and Al) to the number of ...

Embodiment 2

[0107] LiNi was synthesized by the same method as in Example 1 except that the main baking temperature was 750 °C 0.82 co 0.15 Al 0.03 o 2 . Table 1 shows the preparation conditions.

[0108] According to the X-ray diffraction analysis of the obtained baked product, it can be determined that this is an ideal positive electrode active material with a hexagonal layered structure. 95% or more of the particles of the obtained baked product had a particle size of 20 μm or less, with an average particle size of about 8.36 μm. In addition, the tap density of the obtained baked product was 2.34 g / cm 3 .

[0109] According to the same manner as in Example 1, Rietveld analysis, measurement of average compressive strength, measurement of average volume of pores having a diameter of 40 nm or less, and battery evaluation were performed. The results are shown in Table 2.

Embodiment 3

[0111] LiNi was synthesized by the same method as in Example 2, except that the holding time at the temporary baking temperature (450° C.) was 1 hour 0.82 co 0.15 Al0.03 o 2 . Table 1 shows the preparation conditions.

[0112] According to the X-ray diffraction analysis of the obtained baked product, it can be determined that this is an ideal positive electrode active material with a hexagonal layered structure. 95% or more of the particles of the obtained baked product had a particle diameter of 20 μm or less, and the average particle diameter was 8.43 μm. In addition, the tap density of the obtained baked product was 2.42 g / cm 3 .

[0113] According to the same manner as in Example 1, Rietveld analysis, measurement of average compressive strength, measurement of average volume of pores having a diameter of 40 nm or less, and battery evaluation were performed. The results are shown in Table 2.

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Abstract

To provide a positive electrode active material for a non-aqueous electrolyte secondary battery, which if used as a positive electrode for a lithium ion secondary battery, the battery internal resistance can be reduced, giving a secondary battery superior in output characteristics and life property. After mixing raw material powders in specified quantities of each so as to become a lithium-metal complex oxide represented by Li z Ni 1-w M w O 2 (wherein M is at least one kind or more of metal elements selected from the group consisting of Co, Al, Mg, Mn, Ti, Fe, Cu, Zn, and Ga; and w and z respectively satisfy 0 H01M 4 / 02 H01M 4 / 36 H01M 4 / 04 1 29 3 2007 / 3 / 23 101047237 2007 / 10 / 3 000000000 Sumitomo Metal Mining Co. Japan Oda Syuuhei Kuzuo Ryuichi Ueki Tomoyoshi Suzuki Satoru Yamada Manabu gaolong xin 72003 Japan 2006 / 3 / 23 2006-080375

Description

technical field [0001] The invention relates to a positive electrode active material for a non-aqueous electrolyte secondary battery and a preparation method thereof, and a non-aqueous electrolyte secondary battery using the active material, in particular to an active material using a lithium-nickel composite oxide Material and a nonaqueous electrolyte secondary battery using the active material. Background technique [0002] With the popularity of portable devices such as mobile phones and notebook personal computers, small and lightweight secondary batteries with high energy density are required. As a secondary battery capable of satisfying these performances, there is a lithium ion secondary battery, research and development of which are actively being carried out, and practical applications thereof are also advancing. [0003] Also, in the automotive field, there is an increasing demand for electric vehicles that can solve resource and environmental problems. Therefore...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/02H01M4/36H01M4/04B82Y99/00H01M4/505H01M4/525H01M10/05
CPCH01M10/0525H01M4/485H01M4/505H01M4/525Y02E60/122Y02T10/7011C01G53/006C01G53/42C01P2002/77C01P2004/32C01P2004/61C01P2006/11C01P2006/14C01P2006/21C01P2006/40Y02E60/10Y02T10/70
Inventor 小田周平葛尾龙一上木智善铃木觉山田学
Owner SUMITOMO METAL MINING CO LTD
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