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Electrode for lithium rechargeable battery and lithium rechargeable battery comprising same

A rechargeable battery and electrode technology, applied in non-aqueous electrolyte battery electrodes, battery electrodes, lithium batteries, etc., can solve problems such as unsatisfactory battery performance in operability, and achieve good rate characteristics, high rate characteristics, and good life. Effects of Features

Inactive Publication Date: 2016-03-02
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when conventional binders are used, the bonding force between the current collector and the active material, the operability of the slurry relative to the current collector, and the performance of the resulting battery are unsatisfactory.

Method used

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  • Electrode for lithium rechargeable battery and lithium rechargeable battery comprising same
  • Electrode for lithium rechargeable battery and lithium rechargeable battery comprising same
  • Electrode for lithium rechargeable battery and lithium rechargeable battery comprising same

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0102] Example 1: Preparation of positive electrode and lithium secondary battery including the positive electrode

[0103] 36 g of LiFePO as the positive electrode active material 4 , 0.15g polyvinylidene fluoride substituted with carboxyl group (the amount of carboxyl group: about 1.2×10 -4 mol / g), 2 g of polyvinylidene fluoride, 2 g of carbon black, and 0.2 g of a polyurethane-based compound represented by formula 1 (x=30, y=15, z=10) (weight average molecular weight: approx. 10000) was dispersed in 60 g of N-methylpyrrolidone to prepare a composition for forming a positive electrode active material layer.

[0104] The composition for forming a cathode active material layer was coated on an aluminum foil to form a film having a thickness of 60 μm, thereby preparing a thin electrode plate. Then, the thin electrode plate was dried at a temperature of 135° C. for at least 3 hours, and then pressed, thereby completing the positive electrode.

[0105] Separately, an anode was...

example 2

[0108] Example 2: Preparation of positive electrode and lithium secondary battery including the positive electrode

[0109] A lithium secondary battery was fabricated as in Example 1 except that the amount of the polyurethane-based compound represented by Formula 1 was 0.4 g.

example 3

[0110] Example 3: Preparation of positive electrode and lithium secondary battery including the positive electrode

[0111] A lithium secondary battery was fabricated as in Example 1 except that the amount of the polyurethane-based compound represented by Formula 1 was 0.6 g.

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Abstract

An electrode for a lithium rechargeable battery including an electrode active material and a polyurethane-based compound, and having pores having an average diameter of 2 to 20 nm, and a lithium secondary battery including the electrode

Description

[0001] This application claims priority to U.S. Provisional Application No. 61 / 434,775, filed January 20, 2011, and U.S. Patent Application No. 13 / 244,245, filed September 24, 2011 right and interest, the entire contents of which application is hereby incorporated by reference. technical field [0002] One or more embodiments of the present invention relate to an electrode for a lithium secondary battery and a lithium secondary battery including the same. Background technique [0003] Recently, lithium secondary batteries are being used as power sources for portable compact electronic devices. Since the lithium secondary battery uses an organic electrolyte, the lithium secondary battery has high energy density, and thus, the discharge voltage of the lithium secondary battery is at least twice as high as that of a battery using a conventional alkaline aqueous electrolyte solution. [0004] In lithium secondary batteries, materials capable of intercalating and deintercalating...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/13H01M4/62H01M10/052
CPCH01M4/136H01M4/1397H01M4/621H01M4/622H01M10/052H01M2004/021Y02E60/10
Inventor 曹彩雄张云硕张范镇金基俊崔龟锡李孟恩
Owner SAMSUNG SDI CO LTD
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