Process for producing layered lithium nickel oxide, and lithium secondary cell employing it

A technology of lithium secondary battery and manufacturing method, applied in lithium oxide;/hydroxide, oxide/hydroxide preparation, nickel compound and other directions, can solve the problem of low fundamental structural stability of positive electrode material, and achieve high Effect of capacity and electrochemical properties, improved thermal stability, and high-efficiency electrochemical properties

Active Publication Date: 2014-10-15
SK ON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even so, LiNi 1-x co x o 2 (x2 The fundamental structural stability of the cathode material in the form of

Method used

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  • Process for producing layered lithium nickel oxide, and lithium secondary cell employing it
  • Process for producing layered lithium nickel oxide, and lithium secondary cell employing it
  • Process for producing layered lithium nickel oxide, and lithium secondary cell employing it

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Add 2 g of Ni as a precursor compound to a mixed solution obtained by dissolving 0.4 g of aluminum acetate in 30 ml of ethanol 0.89 co 0.11 (OH) 2 , and mixed at 200 rpm for 1 hour, the solvent was evaporated using a heating plate to obtain a powder, and then the above powder was vacuum-dried at 100°C.

[0054] With the obtained powder and LiOH·H 2 The molar ratio of O was Li / (Ni+Co+Al)=1.03, and pulverized and mixed in a mortar. With respect to the above-mentioned mixture, the heat treatment process was continuously implemented at 450° C. for 5 hours and at 750° C. for 18 hours under an oxygen atmosphere.

Embodiment 2

[0056] It manufactured by the method similar to Example 1 except having dissolved 0.6 g of aluminum acetate in 30 ml of ethanol.

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Abstract

The invention relates to a process for producing a layered lithium nickel oxide, and a lithium secondary cell employing it. The metal oxide for a cathode active material of a lithium secondary battery is capable of having improved structural and thermal stability, high efficiency, high capacity, and excellent cycle property and life span property, the metal oxide represented by the following Chemical Formula 1: [Chemical Formula 1] Li a Ni x Co y M z O 2 (in Chemical Formula 1, M is any one selected from aluminum, magnesium, titanium, gallium and indium, and a, x, y and z satisfy 1.01<=a<=1.05, 0.7<=x<=0.9, 0<=y<=0.17, 0.02<=z<=0.16, and x+y+z=1, respectively).

Description

technical field [0001] The invention relates to a lithium metal oxide used as a cathode active material of a lithium secondary battery. Background technique [0002] With the increasing importance of the portability of electronic products, lithium secondary batteries are widely used as power sources for small electronic devices such as notebook PCs, PDAs, mobile phones, and cameras. They have the characteristics of high capacity, high output, and long life. Its scope of application has been gradually expanded. However, due to limitations of existing electrode materials used in lithium secondary batteries, there is a problem that it is difficult to use for a long time. Various studies are currently being conducted to overcome such problems, and in particular, development of various new positive electrode active materials is being studied. [0003] A representative material used as a positive electrode active material for a lithium secondary battery is lithium cobalt oxide (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525H01M4/62H01M10/052
CPCH01M4/0471H01M4/525C01G53/006H01M10/052C01P2002/72H01M4/485C01B13/14C01D15/02H01M4/1391C01G51/006C01P2002/88C01P2002/76C01P2002/85C01P2004/61Y02E60/122Y02E60/10
Inventor 金寿镐黃海淑姜旼求曹在弼赵珉纪
Owner SK ON CO LTD
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