Separator for non-aqueous rechargeable lithium battery

A technology for recharging and lithium batteries, applied to secondary batteries, battery pack components, circuits, etc., can solve problems such as the deterioration of rechargeable batteries without consideration, and achieve the effect that it is not easy to deteriorate

Active Publication Date: 2009-06-17
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, in such a rechargeable battery, the deterioration of the rechargeable battery due to the transition metal contained in the electrode is not considered

Method used

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  • Separator for non-aqueous rechargeable lithium battery
  • Separator for non-aqueous rechargeable lithium battery
  • Separator for non-aqueous rechargeable lithium battery

Examples

Experimental program
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Effect test

Embodiment 1～9

[0067] 3 parts by weight of N-methyl-2-pyrrolidone solution, 95 parts by weight of LiCoO 2 and 2 parts by weight of conductive carbon were mixed to provide positive electrode slurry. The positive electrode slurry was uniformly coated on a 15 μm thick Al foil and dried to provide a positive electrode. LiCoO 2 : Conductive carbon: The weight ratio of polyvinylidene fluoride is 95:2:3.

[0068] A mixture of lithium vanadium oxide (LVO) powder and carbon material powder is used as an anode active material. 90 parts by weight of the mixture were mixed with 10 parts by weight of polyvinylidene fluoride as a binder, and dispersed in N-methyl-2-pyrrolidone to provide negative electrode slurry. The negative electrode slurry was uniformly coated on a 20 μm thick copper foil and dried to provide a negative electrode.

[0069] A polyethylene separator with a buffer layer of a composite including meta-aramid polymer as an organic compound and other various as shown in Table 1 (for Exam...

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Abstract

A separator for non-aqueous rechargeable lithium batteries and a non-aqueous rechargeable lithium battery including the separator are provided. The separator includes a separator body and a composite including an organic compound and an inorganic compound supporting the separator body, where the organic compound has a higher melting point than that of the material composing the separator body, and the inorganic compound includes an element selected from the group consisting of 1A, 2A, 3A, 4A, 3B, and 5B elements from the periodic table, and combinations thereof, and at least one moiety selected from the group consisting of oxides, hydroxides, carbonates, phosphates, sulfates, nitrates, alkoxides, and combinations thereof.

Description

technical field [0001] The present invention relates to separators for non-aqueous rechargeable lithium batteries. Background technique [0002] A conventional non-aqueous rechargeable lithium battery has a separator including an electrically insulating porous membrane between positive and negative electrodes and an electrolyte solution in which dissolved lithium salt fills the pores of the membrane. Such non-aqueous rechargeable lithium batteries have excellent characteristics, for example, high capacity and high energy density. [0003] The positive or negative electrodes of conventional non-aqueous rechargeable lithium batteries have active materials of transition metal compounds. For example, when the positive electrode active material includes such as LiCoO 2 In the case of Li-Co oxides such as Li-Co, during charge and discharge cycles, through the intercalation reaction of lithium ions, trivalent cobalt ions (Co 3+ ) into unstable tetravalent cobalt ions (Co 4+ ). ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M10/36
CPCY02E60/12Y02E60/10
Inventor 前田英明小池将树高瀬浩成金根培
Owner SAMSUNG SDI CO LTD
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