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Solid electrolyte composition, solid electrolyte, lithium ion secondary battery, and method for producing lithium ion secondary battery

A solid electrolyte and composition technology, applied in non-aqueous electrolyte battery electrodes, solid electrolytes, secondary batteries, etc., can solve the problems of reduced lithium ion conductivity, high crystallinity, and reduced molecular chain mobility, and achieve lithium ion The effect of improved conductivity and improved strength

Inactive Publication Date: 2015-05-13
MIE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Solid electrolytes in which lithium salts are dissolved in linear polyethylene oxide have the problem of lower lithium ion conductivity at low temperatures
This is considered to be due to the fact that linear polyethylene oxide has high crystallinity, so the mobility of molecular chains at low temperatures decreases.

Method used

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  • Solid electrolyte composition, solid electrolyte, lithium ion secondary battery, and method for producing lithium ion secondary battery
  • Solid electrolyte composition, solid electrolyte, lithium ion secondary battery, and method for producing lithium ion secondary battery
  • Solid electrolyte composition, solid electrolyte, lithium ion secondary battery, and method for producing lithium ion secondary battery

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no. 1 Embodiment approach

[0078] The first embodiment relates to a unipolar lithium ion secondary battery. The lithium ion secondary battery of the first embodiment is an all solid polymer lithium ion secondary battery.

[0079] (structure)

[0080] figure 1 It is a schematic diagram of the lithium ion secondary battery of the first embodiment. figure 1 A cross section of the lithium ion secondary battery 1002 is shown.

[0081] Such as figure 1 As shown, lithium ion secondary battery 1002 has a structure in which negative electrode current collector 1004 , negative electrode active material layer 1006 , solid electrolyte layer 1008 , positive electrode active material layer 1010 , and positive electrode current collector 1012 are sequentially stacked. The solid electrolyte layer 1008 is sandwiched between the negative electrode active material layer 1006 and the positive electrode active material layer 1010, and the negative electrode active material layer 1006 and the positive electrode active...

no. 2 Embodiment approach

[0159] The second embodiment relates to a method of manufacturing a lithium ion secondary battery suitable for manufacturing the lithium ion secondary battery of the first embodiment.

[0160] (summary)

[0161] Figure 6 ~ Figure 10 It is a schematic diagram explaining the manufacturing method of the lithium ion secondary battery of 2nd Embodiment. Figure 6 ~ Figure 10 A cross section of a half-finished lithium ion secondary battery 1002 is shown. In the second embodiment, a negative electrode current collector 1004, a negative electrode active material layer 1006, and a solid electrolyte layer 1008 are stacked. Figure 8 The negative electrode side laminate 2030 shown is formed by laminating the positive electrode active material layer 1010 and the positive electrode current collector 1012. Figure 10 In the positive electrode-side laminate 2032 shown, the negative-electrode-side laminate 2030 and the positive-electrode-side laminate 2032 are bonded together to manufactu...

no. 3 Embodiment approach

[0184] The third embodiment relates to a method of manufacturing a lithium ion secondary battery employed instead of the method of manufacturing a lithium ion secondary battery of the second embodiment.

[0185] Figure 11 to Figure 15 It is a schematic diagram explaining the manufacturing method of the lithium ion secondary battery of 3rd Embodiment. Figure 11 to Figure 15 A cross section of a half-finished lithium ion secondary battery 1002 is shown. The second embodiment differs from the third embodiment in that, in the third embodiment, the solid electrolyte layer 1008 is formed on the positive electrode-side laminate 3032 .

[0186] In particular, focusing on the difference between the second embodiment and the third embodiment, a method for manufacturing a lithium ion secondary battery will be described.

[0187] After preparing the precursor mixture, as in Figure 11 As shown, a precursor layer 2006 is formed on the current collecting face 1014 of the negative elect...

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Abstract

This invention relates to a matrix of a solid electrolyte having a microstructure in which a non-reactive polyalkylene glycol is held on a co-crosslinked product produced by chemically co-crosslinking a hyperbranched polymer with a crosslinkable ethylene oxide multicomponent copolymer, such that a lithium salt is dissolved in the matrix. A negative electrode active material layer is a layer obtained by dispersing a negative electrode active material and a conduction aid in a lithium-ion conducting solid electrolyte. A positive electrode active material layer is a layer obtained by dispersing a positive electrode active material and a conduction aid in a lithium-ion conducting solid electrolyte.

Description

technical field [0001] The present invention relates to a composition for a lithium ion conductive solid electrolyte, a solid electrolyte, a lithium ion secondary battery, and a method for producing the lithium ion secondary battery. Background technique [0002] A solid electrolyte obtained by dissolving a lithium salt in linear polyethylene oxide has a problem that lithium ion conductivity decreases at low temperatures. This is considered to be because the linear polyethylene oxide has high crystallinity, so the mobility of the molecular chain at low temperature is reduced. [0003] In order to solve this problem, in Patent Documents 1 and 2, co-crosslinking of a hyperbranched polymer having a branched molecular chain containing a polyoxyalkylene chain and a spacer is proposed as an alternative to a linear polyethylene oxide matrix. body and a solid electrolyte made by dissolving lithium salt in the co-crosslinked body. The mobility of the molecular chain of the co-cross...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0565C08F299/00C08K3/10C08L71/02H01B1/06
CPCC08F299/024C08L71/02H01B1/122H01M4/13H01M4/622H01M10/0525H01M10/0565H01M2300/0082C08G65/2615C08G65/3322Y02E60/10Y02P70/50C08F299/00C08K3/10
Inventor 伊藤敬人宇野贵浩武田保雄今西诚之伊坪明野村荣一加藤重光奥田清次
Owner MIE UNIVERSITY
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