All-solid-state battery

An all-solid-state battery, solid electrolyte technology, applied in lithium batteries, battery electrodes, secondary batteries, etc., can solve problems such as electrolyte leakage

Inactive Publication Date: 2012-12-26
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the battery of the above-mentioned structure, there is a danger of electrolyte leakage.
In addition, there is a problem that the organic solvent etc. used for the electrolytic solution is a flammable substance

Method used

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  • All-solid-state battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0048]

[0049] First, in order to produce an all-solid-state battery, an electrode layer sheet and a solid electrolyte layer sheet were produced as follows.

[0050] First, anatase-type titanium oxide (TiO 2 ) powder, as a solid electrolyte, Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 (hereinafter referred to as "LAGP") glass powder.

[0051] Next, the anatase-type titanium oxide powder and the binder solution were mixed to prepare an electrode active material slurry. In addition, LAGP glass powder was mixed with a binder solution to make a solid electrolyte slurry. Carbon powder was also mixed with a binder solution to create a carbon paste. In addition, the binder solution is prepared by dissolving polyvinyl alcohol in an organic solvent.

[0052] The obtained electrode active material slurry, solid electrolyte slurry, and carbon slurry were mixed to prepare electrode layer slurry. The mixing ratio between LAGP glass powder, anatase-type titanium oxide powder and carbon powde...

Embodiment 2）

[0068] In embodiment 2, used brookite type titanium oxide (TiO 2 ) to replace the anatase-type titanium oxide used as the electrode active material in Example 1. Other manufacturing conditions are the same as in Example 1, thus an all-solid-state battery is manufactured.

[0069]

[0070] 50μA / cm in the voltage range of 1.0~3.0V 2 The obtained all-solid-state battery was charged and discharged at a constant current and a constant voltage at a current density. As a result, it was confirmed that the discharge capacity was about 100 mAh / g, charge and discharge were possible, and the battery exhibited the same level of capacity as a battery using an electrolytic solution.

Embodiment 3）

[0072] In embodiment 3, used molybdenum dioxide (MoO 2 ) powder to replace the anatase titanium oxide (TiO 2 ). Other manufacturing conditions are the same as in Example 1, thus an all-solid-state battery is manufactured.

[0073]

[0074] 50μA / cm in the voltage range of 1.0~3.0V 2 The obtained all-solid-state battery was charged and discharged at a constant current and a constant voltage at a current density. As a result, it was confirmed that the discharge capacity was about 200 mAh / g, and it was possible to charge and discharge, showing a capacity equivalent to that of a battery using an electrolytic solution.

[0075] In addition, in the voltage range of 1.4 ~ 3.0V at 50μA / cm 2 The obtained all-solid-state battery was charged and discharged at a constant current and a constant voltage at a current density. As a result, the discharge capacity in the first cycle was 200 mAh / g, the discharge capacity in the fifth cycle was 198 mAh / g, and the cycle efficiency was 99%. ...

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Abstract

Provided is an all-solid-state battery which has the same level of discharge capacity as that achieved when an electrolytic solution is used, and which can have improved cycle stability. The all-solid-state battery (10) is provided with a solid electrolyte layer (12) and a positive electrode layer (11) and a negative electrode layer (13) both so arranged as to face to each other through the solid electrolyte layer (12). The positive electrode layer (11) and / or the negative electrode layer (13) is bonded to the solid electrolyte layer (12) by burning. The negative electrode layer (13) comprises an electrode active material composed of a lithium-free metal oxide and a titanium-free solid electrolyte.

Description

technical field [0001] The present invention generally relates to an all-solid-state battery, and particularly relates to an all-solid-state battery comprising a solid electrolyte layer, a positive electrode layer, and a negative electrode layer, and at least one of the positive electrode layer and the negative electrode layer is bonded to the fixed electrolyte layer by firing. Background technique [0002] In recent years, the demand for batteries as a power source for portable electronic devices such as mobile phones and portable personal computers has greatly expanded. Conventionally, batteries used for such applications have used electrolytes (electrolyte solutions) such as organic solvents as a medium for moving ions. [0003] However, in the battery having the above configuration, there is a risk of leakage of the electrolytic solution. In addition, there is a problem that an organic solvent or the like used for the electrolytic solution is a flammable substance. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M4/13H01M4/48H01M4/62H01M10/0585
CPCH01M10/0562Y02E60/122H01M4/1395H01M4/62H01M4/483H01M4/134H01M2/1673H01M4/0407H01M4/0409H01M4/043H01M4/0471H01M4/131H01M4/1391H01M10/052H01M50/46Y02E60/10Y02P70/50H01M4/13H01M4/48H01M10/0585
Inventor 吉冈充尾内倍太林刚司西田邦雄
Owner MURATA MFG CO LTD
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