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Electrode and fabrication method, electrode element and nonaqueous electrolytic storage element

An electrode element and electrode technology, applied in the field of non-aqueous electrolyte storage elements, can solve problems such as difficult short circuit, and achieve the effect of suppressing thermal runaway reaction

Active Publication Date: 2020-08-04
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is extremely difficult to completely prevent self-shorting by simply providing a separator or porous layer that physically separates the electrodes

Method used

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  • Electrode and fabrication method, electrode element and nonaqueous electrolytic storage element
  • Electrode and fabrication method, electrode element and nonaqueous electrolytic storage element
  • Electrode and fabrication method, electrode element and nonaqueous electrolytic storage element

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0035] figure 1 A cross-sectional view for explaining the negative electrode used in the non-aqueous electrolyte storage element according to the first embodiment. refer to figure 1 The negative electrode 10 is configured to include a negative electrode substrate 11 , a negative electrode mixture layer 12 formed on the negative electrode substrate 11 , and a porous insulating layer 13 formed on the negative electrode mixture layer 12 . The shape of the negative electrode 10 is not particularly specified and may be appropriately selected according to purposes; for example, the shape of the negative electrode 10 may be a flat plate or the like.

[0036] In the negative electrode 10 , at least a part of the porous insulating layer 13 exists inside the negative electrode mixture layer 12 and is integrated (integrated) with the surface of the active material constituting the negative electrode mixture layer 12 . Note that "integrated with the surface" in this case is not a membra...

Embodiment 1

[0127] The negative electrode 10, the positive electrode 20, the electrode element 40, and the nonaqueous electrolyte power storage element 1 were prepared as follows.

[0128] ink preparation

[0129] As the ink for forming the insulating layer, the following solutions were prepared:

[0130] - Tricyclodecane dimethanol diacrylate (Daicel-Ornix Corporation): 49 parts by mass

[0131] - Dipropylene glycol monomethyl ether (manufactured by Kanto Chemical Co., Ltd.): 50 parts by mass

[0132] -Irgacure 184 (manufactured by BASF): 1 part by mass Preparation of negative electrode 10

[0133] 97 parts by mass of graphite particles (average particle size: 10 μm) as a negative active material, 1 part by mass of cellulose as a thickener, and 2 parts by mass of acrylic resin as a binder were uniformly dispersed in water to prepare a negative active material Dispersions. The dispersion was applied to a copper foil having a thickness of 8 μm as the negative electrode substrate 11 , a...

Embodiment 2

[0157] ink preparation

[0158] As the ink for forming the insulating layer, the following solutions were prepared:

[0159] - Tricyclodecane dimethanol diacrylate (Daicel-Ornix Corporation): 29 parts by mass

[0160] - Dipropylene glycol monomethyl ether (manufactured by Kanto Chemical Co., Ltd.): 70 parts by mass

[0161] - Irgacure 184 (manufactured by BASF): 1 part by mass

[0162] After preparing the ink, a nonaqueous electrolyte power storage element 1 was prepared in the same manner as described in Example 1.

[0163] As a result of the SEM observation, it was found that the insulating layers 13A and 23A obtained in Example 2 were observed to have pores having a size of about 0.1-1.0 μm. That is, the results of SEM observation indicated that the prepared insulating layers 13A and 23A were porous insulating layers.

[0164] Next, a viscosity measurement test and an impedance measurement test were performed in the same manner as in Example 1 on the ink for forming an ...

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Abstract

A disclosed electrode includes an electrode base; an electrode mixture layer containing an active material and formed on the electrode base; and a porous insulating layer formed on the electrode mixture layer, where the porous insulating layer contains a resin as a main component, and at least a part of the porous insulating layer is present inside the electrode mixture layer.

Description

technical field [0001] The disclosure discussed herein relates to electrodes and methods of making the same, electrode elements, and nonaqueous electrolyte power storage elements. Background technique [0002] In power storage elements such as batteries and power generation elements such as fuel cells, there is an increasing demand for higher power, higher capacity, and longer life. However, various safety-related issues still exist for element implementation; in particular, preventing thermal runaway reactions caused by short circuits between electrodes is an important issue. [0003] The occurrence of the thermal runaway reaction is considered to be caused by the following factors. A large abnormal current due to a short circuit between electrodes generates heat inside the element, which causes a decomposition reaction of the electrolyte and the like. The decomposition reaction of the electrolyte and the like further increase the temperature to generate flammable gas ins...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/36H01M4/60H01M4/62H01M10/0525H01M10/0565H01M4/48H01M4/583H01M4/02H01M4/13H01M4/139H01M10/0566H01M10/0585
CPCY02E60/10H01M10/0525H01M4/13H01M4/139Y02P70/50H01M4/628H01M50/461H01M4/62H01M10/4235H01M4/0404H01M10/0585H01G11/26H01G11/86H01G11/06H01M2300/0025H01M50/403H01M50/46H01M4/366H01M4/483H01M4/583H01M4/604H01M4/622H01M2004/029
Inventor 鹰氏启吾柳田英雄升泽正弘座间优木村兴利川瀬广光大木本美玖
Owner RICOH KK
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