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Anode active material and lithium battery comprising anode active material

一种正极活性物质、二次锂电池的技术，应用在锂蓄电池、非水电解质蓄电池、二次电池等方向，能够解决不能防止电池起火和爆炸的稳定性等问题，达到阻止氧气产生的效果

Inactive Publication Date: 2012-03-14
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, such methods are not suitable for preventing lifetime deterioration and gas formation due to electrolyte decomposition during charge and discharge, and although battery stability can be improved within a limited temperature or voltage range, they ultimately cannot prevent such things as fire and explosion of the battery reduced stability

Method used

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  • Anode active material and lithium battery comprising anode active material
  • Anode active material and lithium battery comprising anode active material
  • Anode active material and lithium battery comprising anode active material

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0068] Synthesis Example 1: Preparation of transition metal oxides

[0069] Including 5% by volume H 2 gas and 95% by volume N 2 Gas H 2 / N 2 Heat treatment of transition metal oxide MoO at a temperature of 1000-1500°C under a reducing atmosphere of a mixed gas 3 10 h to prepare transition metal oxide MoO 2 .

[0070] Confirmation by X-ray Diffraction Analysis of Transition Metal Oxide MoO with an Oxidation Value of 6 3 Formation of transition metal oxide MoO with an oxidation number of 4 2 , the result is shown in figure 1 middle.

Embodiment 1

[0071] Embodiment 1: the manufacture of lithium battery

[0072] By mixing 1 part by weight of the transition metal oxide MoO prepared according to Synthesis Example 1 2 and 100 parts by weight of LiCoO 2 to prepare the positive electrode active material. The gained positive active material of 94wt (weight)% is mixed with the Super P carbon black of 3wt% and the PVDF of 3wt% to prepare positive active material slurry composition, then this slurry composition is coated on the current collector formed by aluminum foil and dried to obtain a positive electrode. Separately, about 3wt% of graphite powder, 3wt% of polyvinylidene fluoride (PVDF) and N-methyl-2-pyrrolidone as binder are mixed to prepare negative electrode active material slurry, and the prepared negative electrode The active material slurry was coated on a copper foil as a current collector to make a negative electrode. A separator formed of polypropylene was inserted between the positive and negative electrodes, a...

Embodiment 2

[0073] Embodiment 2: the manufacture of lithium battery

[0074] A lithium battery was manufactured in the same manner as in Example 1, except that 5 parts by weight of transition metal oxide MoO prepared according to Synthesis Example 1 2 With 100 parts by weight of LiCoO 2 mix.

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Abstract

The invention provides an anode active material preventing from generating an oxygen during a charging period and a lithium battery having a high temperature save characteristic and a high stability. The anode active material comprises a lithium composite oxide and a transition metal oxide, and the transition metal oxide comprises a transition metal of which the oxidation value is less than the oxidation value when the transition metal is located in a most stable state.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Patent Application 61 / 373,691, filed August 13, 2010 with the US Patent and Trademark Office, the entire contents of which are hereby incorporated by reference. technical field [0003] The invention provides a positive active material and a lithium battery comprising the positive active material. Background technique [0004] Demand for portable electronic devices for information communication such as personal digital assistants (PDAs), mobile phones or notebook computers, and lithium secondary batteries for electric bicycles and electric vehicles is increasing, and the development of small and light electronic devices has enabled the use of Commercialization of small lithium batteries with high capacity charge and discharge. [0005] A typical lithium battery includes a positive electrode each containing an active material capable of intercalating and deintercala...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M4/505H01M4/525H01M10/0525
CPCC01G39/02C01G41/02C01G51/04C01G51/42C01G53/42C01P2002/72C01P2002/88C01P2004/80H01M4/131H01M4/362H01M4/364H01M4/366H01M4/48H01M4/485H01M4/525H01M4/628H01M10/052Y02E60/10
Inventor 李泳勋宋在爀崔益圭金荣基李淳律宋有美金润昶
Owner SAMSUNG SDI CO LTD
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