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Positive electrode for rechargeable lithium battery and rechargeable lithium battery including same

A lithium battery, recharging technology, applied in the direction of non-aqueous electrolyte battery electrodes, battery electrodes, secondary batteries, etc., can solve the problem of low capacity and so on

Active Publication Date: 2019-05-03
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although high rates have been achieved, lithium rechargeable batteries using thin electrodes have limitations due to their material properties and suffer from low capacity issues

Method used

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  • Positive electrode for rechargeable lithium battery and rechargeable lithium battery including same
  • Positive electrode for rechargeable lithium battery and rechargeable lithium battery including same
  • Positive electrode for rechargeable lithium battery and rechargeable lithium battery including same

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0107] 85wt%LiCoO 2 (average diameter of 5 μm), 5 wt% activated carbon (YP, average diameter of 7 μm), 7 parts by weight of Mn based on 100 parts by weight of activated carbon 3 o 4 (average diameter of 0.3 μm), 4 wt % carbon black, and 6 wt % polyvinylidene fluoride (PVdF) were mixed and dispersed in N-methyl-2-pyrrolidone to prepare a positive electrode active material composition. The positive electrode active material composition was coated on an Al foil, dried and pressed to form a positive electrode.

[0108] 90 wt% soft carbon and 10 wt% polyvinylidene fluoride (PVdF) were mixed and dispersed in N-methyl-2-pyrrolidone to prepare a negative active material composition. The negative electrode active material composition was coated on a copper foil, dried and pressed to form a negative electrode.

[0109] After a polyethylene separator is placed between the positive and negative electrodes, an electrolyte consisting of ethylene carbonate (EC), ethylmethyl carbonate (EMC...

example 2

[0111] In addition to the 85wt%LiCoO 2 (average diameter of 5 μm), 5 wt% activated carbon (YP, average diameter of 7 μm), 14 parts by weight of Mn based on 100 parts by weight of activated carbon 3 o 4 (average diameter of 0.3 μm), 4wt% carbon black and 6wt% polyvinylidene fluoride (PVdF) were mixed and dispersed in N-methyl-2-pyrrolidone to prepare the positive electrode active material composition, according to Example 1 The same method is used to manufacture lithium rechargeable batteries.

example 3

[0113] In addition to the 85wt%LiCoO 2 (average diameter of 5 μm), 5 wt% activated carbon (YP, average diameter of 7 μm), 21 parts by weight of Mn based on 100 parts by weight of activated carbon 3 o 4 (average diameter of 0.3 μm), 4wt% carbon black and 6wt% polyvinylidene fluoride (PVdF) were mixed and dispersed in N-methyl-2-pyrrolidone to prepare the positive electrode active material composition, according to Example 1 The same method is used to manufacture lithium rechargeable batteries.

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Abstract

The present invention provides a positive electrode for a rechargeable lithium battery and a rechargeable lithium battery. In one aspect, a positive electrode for a lithium rechargeable battery includes: a current collector; a positive electrode active material layer disposed on the current collector, wherein the positive electrode active material layer includes a positive electrode active material, activated carbon and additives.

Description

technical field [0001] The present disclosure relates to a positive electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same. Background technique [0002] Lithium rechargeable batteries utilize intercalation and deintercalation reactions of lithium ions when the battery is charged and discharged. Generally, a lithium rechargeable battery includes a positive electrode including a positive active material, a negative electrode including a negative active material, a separator, and an electrolyte solution. [0003] Possibly, ISG (Idle Stop & Go or Integrated Starter & Generator) system will be widely used in electric vehicles, and experts predict that the commercial demand will exceed USD 10 billion by 2015. [0004] Conventional lead storage batteries that have been studied for use in ISG systems of vehicles are very bulky in terms of capacity and have a disadvantage of shortened cycle life due to charge and discharge cycles. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/13H01M4/62H01M10/0525
CPCH01M4/131H01M4/364H01M4/485H01M4/505H01M4/525H01M4/5825H01M4/583H01M4/587H01M4/623H01M4/625H01M10/0525Y02E60/10H01M4/133H01M4/1391H01M4/1393
Inventor 韩晸宇金荣奇朴选一石田澄人
Owner SAMSUNG SDI CO LTD