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Separator for electrochemical element and fabrication method for same

A technology of electrochemical components and diaphragms, which is applied in the field of diaphragms for electrochemical components and its manufacturing, which can solve the problems of diaphragm shrinkage, increase in the contact area between positive and negative electrodes, etc., and achieve improved safety, excellent flexibility, and high heat resistance Effect

Inactive Publication Date: 2015-01-07
RESONAC CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in conventional separators made of polyolefin resins, the separator at the short-circuited portion shrinks due to heat during short-circuiting, and the contact area (short-circuit area) between the positive electrode and the negative electrode may increase.

Method used

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  • Separator for electrochemical element and fabrication method for same
  • Separator for electrochemical element and fabrication method for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089]

[0090] 0.5 g of glass fibers (CMLF208, manufactured by Nippon Plate Glass, with an average fiber diameter of 0.8 μm) and 600 ml of ion-exchanged water were added to a mixer, and stirred for 2 minutes. Next, 2.24 g of pulp fibers obtained by beating kraft paper were added to a mixer, and stirred for 3 minutes to prepare a slurry. This slurry was poured into a standard sheet machine papermaking device (Model No. 2545, manufactured by Kumagai Riki Kogyo Co., Ltd.), filled with a predetermined amount of ion-exchanged water, stirred well, and then drained to obtain a sheet. Next, the filter paper and cardboard (Japanese original text: ダミーpaper) are superimposed on the sheet, and after couching, the sheet and the filter paper are peeled off from the cardboard, and according to the contact with the sheet, Place it on the SUS plate in the same way and pressurize it at the specified pressure for 3 minutes. Thereafter, the filter paper was peeled off, and the sheet was dried...

Embodiment 2

[0108]0.5 g of glass fibers (CMLF208, manufactured by Nippon Plate Glass, with an average fiber diameter of 0.8 μm) and 600 ml of ion-exchanged water were added to a mixer, and stirred for 2 minutes. Next, 5 mL of cationic polymer coagulant polydiallyldimethylammonium chloride (manufactured by Aldrich), 2.5 g of alumina sol (Alminasol 250, manufactured by Nissan Chemical), and anionic polymer coagulant Hi 10 mL of Holder 351 (manufactured by Kurita Industries) and 2.24 g of pulp fibers obtained by beating kraft paper were stirred for 3 minutes to prepare a slurry. The slurry was poured into a standard sheet machine papermaking device and filled with a specified amount of ion-exchanged water, stirred thoroughly, and then drained. Next, after overlapping the filter paper and the cardboard and placing it on the couch roll, peel off the sheet from the cardboard together with the filter paper, place it on the SUS board in such a way that it is in contact with the sheet, and press i...

Embodiment 3

[0110] 0.25 g of glass fibers (CMLF208, manufactured by Nippon Plate Glass, with an average fiber diameter of 0.8 μm) and 600 ml of ion-exchanged water were added to a mixer, and stirred for 2 minutes. Next, 2.24 g of pulp fibers obtained by beating kraft paper were added to a mixer, and stirred for 3 minutes to prepare a slurry. This slurry was poured into a standard sheet machine papermaking device (Model No. 2545, manufactured by Kumagai Riki Kogyo Co., Ltd.), filled with a predetermined amount of ion-exchanged water, stirred well, and then drained to obtain a sheet. Next, after overlapping the filter paper and cardboard on the sheet and standing it on the couch roll, the sheet and the filter paper are peeled off from the cardboard, placed on the SUS board in such a way that it is in contact with the sheet, and pressed at a specified pressure. Pressurize for 3 minutes. Thereafter, the filter paper was peeled off, and the sheet was dried at 105° C. for 2 hours, then heat-tr...

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Abstract

The present invention provides a new type of separator that has high heat resistance and excellent flexibility and a method for fabricating the separator. The present invention pertains to an electrochemical element separator comprising a porous base material containing inorganic fibers and organic material, in which some or all of the inorganic fibers are coated with the organic material and the inorganic fibers are bound via the organic material.

Description

technical field [0001] The present invention relates to a separator for electrochemical elements and a manufacturing method thereof. Background technique [0002] In recent years, secondary batteries having high voltage and high energy density have been required as power sources for mobile terminals such as notebook computers and mobile phones. At present, lithium ion secondary batteries of non-aqueous electrolyte solutions are attracting attention in order to satisfy the capabilities required for these applications. [0003] Non-aqueous electrolyte secondary batteries represented by lithium ion secondary batteries have high battery voltage and high energy, so a large current flows when the battery is short-circuited internally or externally. Therefore, during a short circuit, there is a problem of battery heat generation due to Joule heat generation, or battery expansion and characteristic degradation due to gas generation due to melting and decomposition of the electrolyt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01G9/02H01G11/52H01M50/403H01M50/429H01M50/434H01M50/437H01M50/443H01M50/489
CPCH01G11/52Y02E60/13H01M2/145H01M10/052H01G9/02H01M2/1613H01G11/84H01M10/0525H01M50/44H01M50/446H01M50/403H01M50/443H01M50/489H01M50/429H01M50/437H01M50/434Y02E60/10H01M50/4295H01M50/491H01M50/431H01M50/449H01M50/417H01M50/42H01M50/423H01M50/414
Inventor 织田明博河添宏吉田诚人北冈卓也
Owner RESONAC CORPORATION
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