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Method for manufacturing electrode, apparatus for manufacturing electrode, and method for manufacturing secondary cell

A manufacturing method and secondary battery technology, applied in electrode manufacturing, secondary batteries, non-aqueous electrolyte storage batteries, etc., can solve the problems of uneven drying of the electrode layer, solute bias flow, inability to obtain a uniform electrode layer, etc., and achieve difficult cracking. And the effect of incision, heat release uniformity, no local deterioration

Inactive Publication Date: 2007-10-17
SEIKO EPSON CORP
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Problems solved by technology

[0006] However, when using an inkjet type droplet discharge device, since the composition for forming an electrode layer is applied in units of droplets, in the heating and drying process using an oven or a hot plate, etc., in the coating film, The solute is biased due to convection, resulting in uneven drying on the surface of the formed electrode layer, and the problem that a uniform electrode layer cannot be obtained.

Method used

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  • Method for manufacturing electrode, apparatus for manufacturing electrode, and method for manufacturing secondary cell
  • Method for manufacturing electrode, apparatus for manufacturing electrode, and method for manufacturing secondary cell
  • Method for manufacturing electrode, apparatus for manufacturing electrode, and method for manufacturing secondary cell

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[0103] Preparation of spinel-type LiMn as positive electrode active material 2 o 4 (average particle diameter: 0.6 μm), carbon black (2 parts by mass) as a conductive material, and a surfactant (5 parts by mass) for stabilizing the dispersion of solid components, to which N-methylpyrrolidone (75 parts by mass). This was stirred well to prepare a composition for positive electrode layer formation (hereinafter referred to as "composition 1"). The composition has a viscosity of approximately 10 cP.

[0104] According to the electrode production line II shown in FIG. 1 , a positive electrode layer was produced using the composition as follows.

[0105] The composition 1 was introduced into the droplet discharge device 1a, and the composition was discharged onto an aluminum foil having a thickness of 20 μm as a current collector to form a coating film of the composition 1.

[0106] Within one minute after the coating film is formed, the current collector on which the coating fi...

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Abstract

The present invention provides a manufacturing method of an electrode having an electrode layer having a uniform and small thickness without causing drying irregularity, to provide a manufacturing device of an electrode, and to provide a manufacturing method of a secondary battery. This manufacturing method of an electrode is used for manufacturing the electrode having a collector, and the electrode layer formed on the collector and containing an active material. In the manufacturing method of an electrode, a composition for electrode layer formation containing an active material and an organic solvent is discharged on the collector by a droplet discharging device to form a coating film, thereafter an atmosphere including the coating film is depressurized up to pressure for setting the boiling point of the organic solvent at 10-30[deg.]C within a predetermined time and the pressure is kept, whereby the solvent is dried and removed to form the electrode layer. This manufacturing device of an electrode is used for executing the method. This manufacturing method of a secondary battery has a process for forming the electrode by the manufacturing method of an electrode.

Description

technical field [0001] The present invention relates to a method of manufacturing an electrode using a droplet discharge device, an electrode manufacturing device, and a method of manufacturing a secondary battery. Background technique [0002] In recent years, with the introduction of electric vehicles (EV), hybrid electric vehicles (HEV), and fuel cell vehicles (FCV), the development of batteries that serve as power sources for these vehicles has also been rapidly developed. These batteries have very strict conditions such as being able to be repeatedly charged and discharged, and being able to achieve high output and high energy density. [0003] In order to meet the above-mentioned requirements, Patent Document 1 proposes a battery in which a thin secondary battery is housed in a plate-shaped positive electrode and a negative electrode in an external container and connected in series and parallel. A liquid electrolyte is sealed between the positive electrode and the ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M10/00B05C5/00B05C9/12B05D3/12H01M4/02H01M4/139H01M4/1391H01M4/36H01M10/05
CPCH01M4/525H01M2004/028H01M4/502H01M4/1391Y10T29/49115Y02E60/122Y02E60/10Y02P70/50H01M4/139H01M4/485
Inventor 长谷井宏宣
Owner SEIKO EPSON CORP
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