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Negative electrode for fluoride ion secondary battery, and fluoride ion secondary battery provided with same

A technology of fluoride ion and secondary battery, which is applied in the direction of secondary battery, battery electrode, active material electrode, etc., can solve the problems such as difficult electrochemical reactions, and achieve the effect of large battery capacity

Pending Publication Date: 2022-07-26
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, although the use of aluminum fluoride has been studied, there is a problem that the electrochemical reaction is difficult to occur due to the electrical insulating properties of aluminum fluoride.

Method used

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  • Negative electrode for fluoride ion secondary battery, and fluoride ion secondary battery provided with same
  • Negative electrode for fluoride ion secondary battery, and fluoride ion secondary battery provided with same
  • Negative electrode for fluoride ion secondary battery, and fluoride ion secondary battery provided with same

Examples

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Embodiment 1、2

[0085] according to Figure 4 The negative electrode for fluoride ion secondary batteries of Examples 1 and 2 was produced by the manufacturing method of the negative electrode for fluoride ion secondary batteries of this embodiment shown. Both Examples 1 and 2 used Li with an average particle size of micrometers (10 μm to 100 μm). 3 AlF 6 with AlF 3 The composite, the fluoride ion-conducting fluoride having an average particle diameter of 0.1 to 100 μm, and the conductive aid having an average particle diameter of 20 to 50 nm. In addition, Li in the negative electrode for fluoride ion secondary battery was 3 AlF 6 with AlF 3 The content of the complex was set to 25% by mass. In addition, in Example 1, LiF and AlF were combined 3 The molar ratio is set to LiF:AlF 3 = 1:1 synthesis of Li 3 AlF 6 with AlF 3 The composite of LiF and AlF in Example 2 3 The molar ratio is set to LiF:AlF 3 = 2:1 synthesis of Li 3 AlF 6 with AlF 3 the complex.

reference example 1

[0089] according to Figure 4 The negative electrode for a fluoride ion secondary battery of the reference example 1 was produced by the manufacturing method of the negative electrode for fluoride ion secondary batteries of this embodiment shown. Specifically, combining LiF with AlF 3 The molar ratio is set to LiF:AlF 3 = 3:1 The negative electrode obtained by synthesis is used as Reference Example 1, which uses Li with an average particle size of micrometers (10 μm to 100 μm). 3 AlF 6 , fluoride ion-conductive fluoride with an average particle size of 0.1 to 100 μm, and a conductive aid with an average particle size of 20 to 50 nm. In addition, Li in the negative electrode for fluoride ion secondary battery 3 AlF 6 content of 25% by mass.

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Abstract

The problem addressed by the present invention is to provide a fluoride ion secondary battery having a larger battery capacity than in the prior art. In order to solve the problem, provided is a negative electrode for a fluoride ion secondary battery, which contains a composite of Li3AlF6 and AlF3 as a negative electrode active material. The molar ratio of AlF3 to Li3AlF6 in the composite of Li3AlF6 and AlF3 is preferably 0.1-2, the content of the composite of Li3AlF6 and AlF3 in the negative electrode for fluoride ion secondary batteries is preferably 25 mass% or less, and the composite of Li3AlF6 and AlF3 is preferably amorphous.

Description

technical field [0001] The present invention relates to a negative electrode for a fluoride ion secondary battery and a fluoride ion secondary battery provided with the negative electrode. Background technique [0002] Conventionally, fluoride ion secondary batteries using fluoride ions as carriers have been proposed (for example, see Patent Documents 1 to 6). In recent years, fluoride ion secondary batteries are expected to have higher battery characteristics than lithium ion secondary batteries, and various studies have been conducted. [0003] For example, aluminum-based materials are exemplified as negative electrode active material candidates for fluoride ion secondary batteries. Among them, although the use of aluminum fluoride has been studied, since aluminum fluoride has electrical insulating properties, there is a problem that it is difficult to cause an electrochemical reaction. [0004] [Prior Art Literature] [0005] (patent literature) [0006] Patent Docume...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/136H01M4/1397H01M10/0525
CPCH01M4/58H01M4/136H01M4/1397H01M10/0525H01M4/364H01M4/582H01M10/05H01M2004/027Y02E60/10H01M10/0562H01M10/052
Inventor 田中觉久森田善幸
Owner HONDA MOTOR CO LTD