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Molten salt battery

A molten salt battery, molten salt technology, applied in molten electrolytes, battery electrodes, secondary batteries, etc., can solve problems such as increasing the cost, scarcity, and deterioration of molten salt batteries

Inactive Publication Date: 2013-07-31
SUMITOMO ELECTRIC IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When a mixed salt of sodium salt and cesium salt is used, cesium ions also cause deterioration of the positive electrode
Also, the use of cesium raises the cost of molten salt batteries because cesium is expensive due to its scarcity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] As a molten salt, a mixed salt of TMHA-FSA and NaFSA was prepared. Then, the relationship between the state of the mixed salt at room temperature and the molar ratio of TMHA-FSA to NaFSA in the mixed salt was studied. First, TMHA-Br manufactured by Wako Pure Chemical Industries, Ltd. and KFSA manufactured by Mitsubishi Materials Corporation were mixed in water at an equimolar ratio to prepare TMHA-FSA. Then, the resulting precipitate was filtered and washed several times with water. Subsequently, TMHA-FSA was prepared by performing vacuum drying at 80°C. Note that Br is bromine and K is potassium. The prepared TMHA-FSA and NaFSA manufactured by Mitsubishi Materials Corporation, Ltd. were mixed at various molar ratios in a glove box under an argon atmosphere to study their melting behavior at room temperature.

[0099] figure 2 It is a table showing the molar ratio in the mixed salt of TMHA-FSA and NaFSA and the state of the mixed salt at each molar ratio at room te...

Embodiment 2

[0101] As a molten salt, a mixed salt of EMI-FSA and NaFSA was prepared. Then, the relationship between the state of the mixed salt at room temperature and the molar ratio of EMI-FSA to NaFSA in the mixed salt was studied. EMI-FSA was obtained from Tokyo Chemical Industry Co., Ltd. EMI-FSA and NaFSA manufactured by Mitsubishi Materials Corporation, Ltd. were mixed at various molar ratios in a glove box under an argon atmosphere to study their melting behavior at room temperature.

[0102] image 3 It is a table showing the molar ratio in the mixed salt of EMI-FSA and NaFSA and the state of the mixed salt at each molar ratio at room temperature. Such as image 3 The molar ratios of EMI-FSA to NaFSA (EMI-FSA:NaFSA) were prepared as shown in 8:2, 7:3, 6:4, 5:5, 4:6, 3:7 and 2:8, respectively. of seven mixed salts. Mixed salts with molar ratios of 8:2 and 7:3 are liquid at room temperature. In addition, mixed salts of other molar ratios are in a mixed state of liquid and sol...

Embodiment 3

[0104] As a molten salt, a mixed salt of P13-FSA and NaFSA was prepared. Then, the relationship between the state of the mixed salt at room temperature and the molar ratio of P13-FSA to NaFSA in the mixed salt was studied. P13-FSA was obtained from Tokyo Chemical Industry Co., Ltd. P13-FSA and NaFSA manufactured by Mitsubishi Materials Corporation, Ltd. were mixed at various molar ratios in a glove box under an argon atmosphere to study their melting behavior at room temperature.

[0105] Figure 4 It is a table showing the molar ratio in the mixed salt of P13-FSA and NaFSA and the state of the mixed salt at each molar ratio at room temperature. Such as Figure 4 As shown in , the molar ratios of P13-FSA to NaFSA (P13-FSA:NaFSA) were prepared as 8:2, 7:3, 6:4, 5:5, 4:6, 3:7 and 2:8 of seven mixed salts. Various mixed salts with molar ratios of 8:2, 7:3, 6:4, 5:5 and 4:6 are liquid at room temperature. In addition, molten salts of other molar ratios are in a mixed state o...

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PUM

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Abstract

A separator (3) of a molten salt battery is impregnated with a molten salt that serves as an electrolyte. The molten salt contains, as cations, at least one kind of ions selected from among quaternary ammonium ions, imidazolium ions, imidazolinium ions, pyridinium ions, pyrrolidinium ions, piperidinium ions, morpholinium ions, phosphonium ions, piperazinium ions and sulfonium ions in addition to sodium ions. These cations do not have adverse effects on a positive electrode (1). In addition, the melting point of the molten salt, which contains sodium ions and the above-mentioned cations, is significantly lower than the operating temperature of sodium-sulfur batteries, said operating temperature being 280-360 DEG C. Consequently, the molten salt battery is capable of operating at lower temperatures than sodium-sulfur batteries.

Description

technical field [0001] The present invention relates to a molten salt battery using molten salt as an electrolyte. Background technique [0002] The utilization of natural energy such as solar energy or wind energy has recently been promoted. In power generation by natural energy, the amount of power generation tends to vary under the influence of weather conditions and the like. Therefore, in order to supply the generated electric power, the electric power supply should be stabilized by charging and discharging the storage battery. That is, in promoting utilization of natural energy, a storage battery having high energy density and high efficiency is necessary. Such secondary batteries include the sodium-sulfur battery disclosed in Patent Document 1. In sodium-sulfur batteries, sodium ions are used as conducting ions. Other batteries with high energy density and high efficiency include molten salt batteries. [0003] A molten salt battery is a battery using molten salt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/39
CPCH01M10/399H01M10/39Y02E60/12H01M2300/0048Y02E60/122Y02E60/10H01M10/0568H01M10/054H01M4/485
Inventor 新田耕司稻泽信二真岛正利山口笃酒井将一郎福永笃史萩原理加野平俊之松本一彦
Owner SUMITOMO ELECTRIC IND LTD
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