Film-Type Negative Electrode Filled With Active Material And Method For Manufacturing Same

A cathode electrode and active material technology, which is applied in the field of cathode electrode filled with active material in the form of a film and its preparation, can solve the problems of weak life characteristics and safety, achieve the effect of reducing electrolyte consumption and improving life characteristics

Inactive Publication Date: 2014-08-27
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the other hand, there is a problem of weak life characteristics and safety due to excessive volume expansion and contraction (400% from the initial volume expansion) during charge and discharge.

Method used

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  • Film-Type Negative Electrode Filled With Active Material And Method For Manufacturing Same
  • Film-Type Negative Electrode Filled With Active Material And Method For Manufacturing Same
  • Film-Type Negative Electrode Filled With Active Material And Method For Manufacturing Same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Si nanoparticles (Sigma-Aldrich Si nanopowder (633097, <100nm)) sold in the market were mixed with a binder (PVDF) and a conductive additive (Sigma-Aldrich GMC (graphite Mesoporous carbon, 699627, <35nm)) was dispersed in 10 ml of organic solvent (NMP) to prepare active material slurry. Then, after coating a porous film (GLPE, 100nm, 300MPa) on the current collector with a thickness of 25 μm, the organic solvent was evaporated on a hot plate heated at 110° C. for 5 hours, thereby manufacturing a film filled with the above-mentioned active material. A cathode electrode in the form of a porous film of slurry. (Active material filling rate: 36%)

Embodiment 2

[0062] Si nanoparticles prepared by mechanical pulverization with an average particle size of 50nm and a binder (PVDF) and a conductive additive (Sigma-Aldrich GMC (graphitized mesoporous carbon, 699627, <35nm)) were prepared at a ratio of 6.5:2.5:1 After mixing in the weight ratio, it was dispersed in 10 ml of an organic solvent (NMP) to prepare an active material slurry. Then, after coating a porous film (GLPE, 100nm, 300MPa) on the current collector with a thickness of ~25μm, the organic solvent was evaporated on a hot plate heated at 110°C for 5 hours, thereby manufacturing the above-mentioned active film. A cathode electrode in the form of a porous film of material slurry. (Active material filling rate: 29.25%)

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Abstract

The present invention relates to a film-type negative electrode filled with an active material and a method for manufacturing same. The negative electrode according to the present invention comprises: a porous film base material; and a negative active material nano-particle filling material provided in pores of the porous film base material. According to the present invention, a change in volume of a negative active material can be minimized during charging and discharging so as to improve lifespan characteristics.

Description

technical field [0001] The present invention relates to a cathode electrode in the form of a film filled with an active material and a manufacturing method thereof. More specifically, the present invention relates to an electrode filled with an active material capable of minimizing excessive volume change of the cathode active material during charge and discharge and improving life characteristics. A cathode electrode in the form of a film and a method for producing the same. Background technique [0002] Lithium secondary batteries have been mainly used in small portable devices such as mobile phones and notebooks, but recently, active research is being carried out in anticipation of high utilization rates in large devices such as electric vehicles and wind and solar power storage devices. Research. [0003] In particular, in applications such as electric vehicles and electric storage devices, it is difficult to develop high-capacity / long-life secondary batteries with conv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/02H01M4/38H01M4/62H01M4/04H01M50/414H01M50/429
CPCH01M4/625H01M4/76H01M10/052H01M4/623H01M4/134H01M4/13H01M4/80H01M2004/021H01M2/1626H01M4/0416H01M2/162H01M2/1673Y02E60/122H01M6/40H01M50/4295H01M50/44H01M50/46H01M50/414H01M50/429H01M4/139H01M4/1395H01M4/622Y02E60/10H01M4/02H01M4/38H01M4/62H01M4/04
Inventor 李柱明梁佑荣川上总一郎张东圭郑现珠
Owner SAMSUNG ELECTRONICS CO LTD
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