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Positive electrode active material, preparation method, positive electrode and lithium ion secondary battery

A positive electrode active material, secondary battery technology, applied in secondary batteries, battery electrodes, chemical instruments and methods, etc., can solve the problems of difficult use of positive electrode active materials, reduced life, structural instability, etc.

Inactive Publication Date: 2013-10-02
LOTTE FINE CHEM CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] However, since the positive electrode active material having a substantially layered structure is structurally unstable after lithium ion deintercalation, and its lifetime rapidly decreases due to an increase in resistance (impedance) during charge and discharge at high temperature, the layer Positive electrode active materials with similar structure will be difficult to use in electric vehicles

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  • Positive electrode active material, preparation method, positive electrode and lithium ion secondary battery
  • Positive electrode active material, preparation method, positive electrode and lithium ion secondary battery

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example 1

[0048] Dilute 0.03 g of antimony oxide in 50 mL of isopropanol, and then add 9 g of the Li 2 MnO 3 -LiNiCoMnO 2 , and stirred for 6 hours. Thereafter, the mixture was heated at 120° C. for 6 hours to volatilize isopropanol, and then heated at 600° C. for 6 hours to synthesize a positive electrode active material whose surface was treated with antimony. The content of transition metals in the powder was determined by inductively coupled plasma (ICP) analysis, and the characteristic peaks (003), (101), (006), (102), (102) and (104), (106), (107), (108) and (110) confirm that the crystal structure of the powder is maintained.

[0049] The thus obtained positive electrode active material, Super-P conductive agent and polyvinylidene fluoride (PVDF) binder were carried out in N-methyl-2-pyrrolidine copper (NMP) at a weight ratio of 94:3:3. Mix to form a slurry. The slurry was poured on a thin aluminum plate, and the thin aluminum plate was dried in a conventional drying oven at...

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Abstract

Provided are a positive electrode active material for a lithium ion secondary battery, a method of preparing the positive electrode active material, a positive electrode including the positive electrode active material and a lithium ion secondary battery including the same. The present invention relates to a positive electrode active material for a lithium ion secondary battery expressed by the following Chemical Formula 1 and containing antimony: yLi 2 MnO 3 -(1-y)LiM (1-x) Sb x O 2 (1) where M is one or more selected from the group consisting of nickel (Ni), cobalt (Co), and manganese (Mn), and 0<x<1 and 0<y<1.

Description

technical field [0001] Embodiments relate to a positive electrode active material for a lithium ion secondary battery, a method for preparing the positive electrode active material, and a lithium ion secondary battery including the positive electrode active material, and more specifically, to a A positive active material capable of suppressing an increase in resistance at high temperature and improving lifespan characteristics by including antimony, a method of preparing the positive active material, and a lithium ion secondary battery including the positive active material. Background technique [0002] Recently, in order to meet the demands for miniaturization and light weight of portable electronic devices such as mobile phones, notebook computers, and personal digital assistants (PDAs), improvements such as high The characteristics of capacity, long life and high safety. In addition, interest in electrification of automobiles has increased, and lithium-ion secondary bat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525
CPCH01M4/505H01M4/525C01G53/56C01P2002/50H01M4/131H01M4/364H01M10/0525H01M4/485Y02E60/10H01M4/1391Y02T10/70
Inventor 李美善尹弼相李斗均赵允珠崔信政
Owner LOTTE FINE CHEM CO LTD