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Lithium-containing composite oxide and process for its production

A composite oxide, manufacturing method technology, applied in chemical instruments and methods, nickel compounds, inorganic chemistry, etc., can solve problems such as low output characteristics, and achieve the effect of excellent low temperature characteristics

Active Publication Date: 2016-01-06
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, conventional cathode materials have a problem of low output characteristics in a low-temperature environment (hereinafter referred to as low-temperature characteristics)

Method used

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  • Lithium-containing composite oxide and process for its production
  • Lithium-containing composite oxide and process for its production
  • Lithium-containing composite oxide and process for its production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0146] Hereinafter, examples of the present invention will be described. Examples 1-8 are examples of the present invention, and Examples 9-16 are comparative examples.

[0147] Various physical properties of the composite hydroxides and lithium-containing composite oxides used as precursors were measured by the following methods. Table 1 shows the physical properties of the composite hydroxide which is the precursor of the lithium-containing composite oxide, and Tables 2 and 3 show the physical properties of the lithium-containing composite oxide.

[0148]

[0149] The composition ratio of the metal components contained in the composite hydroxide and the lithium-containing composite oxide was measured by ICP analysis. The composition ratio (p, x, y, z, q) of the lithium-containing composite oxide in Table 2 is Li p Ni x co y mn z Zr q o 2 represents the coefficient of the chemical formula.

[0150]

[0151] The XRD measurement of the composite hydroxide and the li...

example 1

[0170] Nickel sulfate (nickel sulfate (II) hexahydrate, manufactured by Wako Pure Chemical Industries, Ltd. (Wako Pure Chemical Industries, Ltd.)), cobalt sulfate (cobalt sulfate (II) heptahydrate, manufactured by Wako Pure Chemical Industries, Ltd. ), and manganese sulfate (manganese sulfate (II) pentahydrate, manufactured by Wako Pure Chemical Industries, Ltd.) dissolved in ion-exchanged water and filtered to prepare 2.15mol / L nickel sulfate, 1.60mol / L sulfuric acid Cobalt, and 1.25mol / L manganese sulfate aqueous sulfate solution.

[0171] Next, 500 g of ion-exchanged water was placed in the first reaction tank with a capacity of 1 L, and stirring was performed at 400 rpm while maintaining 60° C. while bubbling nitrogen gas. While continuously supplying the above-mentioned sulfate aqueous solution at 1.2 L / hour and 28% by mass ammonia solution at 0.03 L / hour in this ion-exchanged water, an aqueous sodium hydroxide solution of 18 mol / L is supplied to maintain the pH value in ...

example 2

[0175] Composite hydroxide was produced in the same manner as in Example 1, except that the concentration of sulfate contained in the sulfate solution was set to 2.25 mol / L of nickel sulfate, 1.50 mol / L of cobalt sulfate, and 1.25 mol / L of manganese sulfate. powder.

[0176] A lithium-containing composite oxide was obtained in the same manner as in Example 1, except that 200.00 g of the composite hydroxide, 83.73 g of lithium carbonate, and 0.81 g of zirconia were used, and the firing temperature was set to 919°C.

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Abstract

To provide a lithium-containing composite oxide in which lithium ions highly diffuse in the primary particles, and which is excellent in the output characteristics at low temperature, and a process for its production. A lithium-containing composite oxide essentially containing Li, Ni, Co and Mn, which has a crystal structure with space group R-3m, with a c-axis lattice constant being from 14.208 to 14.228 not A, and with an a-axis lattice constant and the c-axis lattice constant satisfying the relation of 3a+5.615<=c<=3a+5.655, and of which the integrated intensity ratio (I003 / I104) of the (003) peak to the (104) peak in an XRD pattern is from 1.21 to 1.39.

Description

technical field [0001] The present invention relates to a lithium-containing composite oxide, a method for producing the same, and a positive electrode for a lithium-ion secondary battery and a lithium-ion secondary battery using the lithium-containing composite oxide. Background technique [0002] Lithium-ion secondary batteries (hereinafter referred to as LIBs) are widely used in portable electronic devices such as mobile phones and notebook computers. As the cathode material of LIB, LiCoO is used 2 , LiNiO 2 、LiNi 0.8 co 0.2 o 2 , LiMn 2 o 4 Composite oxides such as lithium and transition metals (hereinafter simply referred to as lithium-containing composite oxides). [0003] In recent years, LIBs have begun to be used in vehicle power supplies and the like. Specifically, LIBs have begun to be used as power sources for electric vehicles (EV), hybrid vehicles (HEV), and plug-in hybrid vehicles (PHEV) or idling stop power sources driven by electric motors. Therefor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/485H01M4/525H01M4/48
CPCH01M4/48H01M4/485H01M4/505H01M4/525C01G53/50C01P2002/60C01P2002/74C01P2002/76C01P2002/77C01P2004/61C01P2004/62C01P2006/11C01P2006/12C01P2006/40H01M10/052H01M10/0525H01M2004/021H01M2004/028Y02E60/10Y02T10/70
Inventor 河里健田村昌彦江口谅
Owner SUMITOMO CHEM CO LTD
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