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Non-aqueous electrolyte magnesium-based secondary battery

A non-aqueous electrolyte and secondary battery technology, applied in the direction of non-aqueous electrolyte, secondary battery, organic electrolyte, etc., can solve the problem that the battery data is not displayed, and achieve the effect of high charge and discharge capacity maintenance rate

Active Publication Date: 2021-04-27
NAT INST OF ADVANCED IND SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Non-Patent Document 2 only describes the electrolysis / redissolution behavior of Mg metal in ionic liquids, and the battery data does not show it at all.

Method used

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  • Non-aqueous electrolyte magnesium-based secondary battery
  • Non-aqueous electrolyte magnesium-based secondary battery
  • Non-aqueous electrolyte magnesium-based secondary battery

Examples

Experimental program
Comparison scheme
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Embodiment

[0108] Hereinafter, although this invention is demonstrated in more detail based on an Example and a comparative example, this invention is not limited to these descriptions.

reference example 1

[0110] Mg[Tf as electrolyte salt 2 N] 2 The results of thermogravimetric analysis are shown in figure 1 middle. Measured in a nitrogen atmosphere at a heating rate of 10°C·min -1 conduct. It is known that [Tf 2 The Mg salt of N] is stable even above 300°C.

Embodiment 1

[0112] will for Mg[Tf 2 N] 2 The results of thermogravimetric analysis performed under the same conditions as in Reference Example 1 for electrolyte solutions obtained by adding electrolyte salts to various solvents are shown in figure 2 middle. Electrolyte solutions using organic solvents such as triglyme and sulfolane volatilize below 200°C. In contrast, solvents using organic solvents such as Mg[Tf 2 N] 2 Also contains [Tf 2 The ionic liquid of N] is [N 2,2,2,2 ][Tf 2 N], [EMI][Tf 2 The electrolyte of N] is stable even above 300°C.

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Abstract

The present invention provides a non-aqueous electrolyte magnesium-based secondary battery, which is a non-aqueous electrolyte magnesium-based secondary battery equipped with a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte, wherein the anion of the non-aqueous electrolyte contains [N(SO 2 CF 3 ) 2 ] ‑ , the cation contains Mg 2+ and / or organic onium cations.

Description

technical field [0001] The present invention relates to a non-aqueous electrolyte magnesium-based secondary battery. Background technique [0002] Magnesium secondary batteries are expected to be put into practical use as batteries that surpass lithium secondary batteries because of their high theoretical capacity density, abundant resources, and high safety. However, divalent magnesium ions have stronger interaction than monovalent lithium ions, and are difficult to diffuse in the solid phase. [0003] Non-Patent Document 1 reported that Mg 2+ electrochemically intercalated V 2 o 5 However, there is no disclosure about magnesium-based secondary batteries. [0004] Non-Patent Document 2 only describes the electrolysis / redissolution behavior of Mg metal in ionic liquids, and does not show the data of batteries at all. [0005] prior art literature [0006] non-patent literature [0007] Non-Patent Document 1: J.P. Pereira-ramos, R. Messna, J. Perichon, J. Eiectroanal. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/054H01M4/36H01M4/38H01M10/0568
CPCH01M10/0568H01M4/381H01M4/483H01M10/0569H01M2300/0045H01M10/054C07F9/5407H01M4/466Y02E60/10H01M4/587H01M4/362C07C211/63C07C309/06C07C309/21H01M10/056
Inventor 洼田启吾寺本健一大薮理恵松本一
Owner NAT INST OF ADVANCED IND SCI & TECH
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