All-solid ion secondary cell

A secondary battery and all-solid technology, applied in secondary batteries, battery electrodes, circuits, etc., can solve the problem of short ion conduction distance and achieve the effect of increasing energy density and output power density

Inactive Publication Date: 2015-07-08
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(1) The active material particles form point contacts with the solid electrolyte particles, and the ion conduction distance is short

Method used

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Experimental program
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Effect test

Embodiment 1

[0043]

[0044] Vanadium oxide glass A having ion conductivity and ferroelectricity, and vanadium oxide glass B having only ion conductivity were prepared. As a raw material, vanadium pentoxide (V 2 o 5 ), phosphorus pentoxide (P 2 o 5 ), tellurium dioxide (TeO 2 ), ferric oxide (Fe 2 o 3 ), barium carbonate (BaCO 3 ), titanium dioxide (TiO 2 ). As the raw material composition of glass A, the molar ratio of various raw materials is: V 2 o 5 :P 2 o 5 :TeO 2 :Fe 2 o 3 :TiO 2 :BaCO 3 =36.2:10:23.1:7.7:11.5:11.5. In addition, as the raw material composition of glass B, the molar ratio of various raw materials is: V 2 o 5 :P 2 o 5 :TeO 2 :Fe 2 o 3 =55:14:22:9. These raw material powders were put into a platinum crucible, and heated at 1100°C for 1 hour in an electric furnace. Also, during heating, stir the raw materials in the platinum crucible to achieve uniformity. Then, the platinum crucible was taken out from the electric furnace, spread on a stainl...

Embodiment 2

[0061]

[0062] Two types of ion-conductive vanadium oxide glasses with different softening points were produced. As a raw material, vanadium pentoxide (V 2 o 5 ), phosphorus pentoxide (P 2 o 5 ), tellurium dioxide (TeO 2 ) powder, ferric oxide (Fe 2 o 3 ). As the raw material composition of glass A with a high softening point, the molar ratio of various raw materials is V 2 o 5 :P 2 o 5 :TeO 2 :Fe 2 o 3 = 47:13:30:10. In addition, as the raw material composition of glass B with a low softening point, the molar ratio is V 2 o 5 :P 2 o 5 :TeO 2 :Fe 2 o 3 =55:14:22:9. These raw material powders were put into a platinum crucible, and heated at 1100°C for 1 hour in an electric furnace. Also, stir during heating to make the raw materials in the platinum crucible uniform. Then, the platinum crucible was taken out from the electric furnace, spread on a stainless steel plate preheated to 150°C, and cooled naturally to obtain vanadium oxide glass. The softenin...

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Abstract

The purpose of the present invention is to improve the energy density and the output density of an all-solid ion secondary cell. In order to achieve the above, the present invention is an all-solid ion secondary cell in which a solid electrolyte layer is bonded between a positive electrode active material layer and a negative electrode active material layer, characterized in that the positive electrode active material layer and / or the negative electrode active material layer is formed by active material particles and solid electrolyte particles being bound together through an ion-conductive and ferroelectric substance interposed therebetween.

Description

technical field [0001] The invention relates to an all solid ion secondary battery. Background technique [0002] The all-solid ion secondary battery using a non-flammable or flame-retardant inorganic solid electrolyte has high heat resistance, and because it seeks to be essentially safe, it can reduce component costs and achieve high energy density. [0003] However, sufficient output power density and energy density cannot be obtained due to the increased resistance to ion movement at the interface between the active material particles and the solid electrolyte particles. The reason why the ion movement resistance at the interface between the active material particle and the solid electrolyte particle is high is considered to be as follows. (1) The active material particles form point contacts with the solid electrolyte particles, and the ion conduction distance is short. (2) Through the local electric field caused by the potential difference between the active material ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M10/0562
CPCH01M10/0562H01M2300/0071C03C3/16C03C3/21C03C4/18C03C10/0072C03C14/006C03C2214/16H01M4/0471H01M4/485H01M4/525H01M4/624H01M10/0525H01M2004/021H01M2300/0091Y02E60/10Y02P70/50H01M4/48
Inventor 藤枝正川治纯青柳拓也内藤孝
Owner HITACHI LTD
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