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Fire-retardant super capacitor electrolyte

A technology of supercapacitors and electrolytes, applied in the direction of hybrid capacitor electrolytes, etc., to achieve the effects of slowing down thermal degradation and inhibiting combustion chain reactions

Active Publication Date: 2016-02-17
湖北诺邦科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Purpose of the present invention is exactly in order to solve the security problem of existing supercapacitor, provides a kind of flame-retardant type supercapacitor electrolyte, is made up of the phosphorus-nitrogen-containing ionic liquid of solvent, electrolyte salt and structural general formula I electrolyte, neither Affect the electrochemical performance of the capacitor, making the electrolyte flame retardant, and the electrolyte can be used under high voltage (above 3.0V), so that the supercapacitor has higher energy density and safety performance

Method used

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Embodiment 1～12

[0027] In a glove box, a certain mass of triethylmethylammonium tetrafluoroborate is dissolved in 100 parts by weight of acetonitrile as an aprotic solvent to form a solution with a concentration of 0.5 mol / L, and then a certain part by weight of the general formula I is added The ionic liquid can form a uniform mixed liquid (according to Table 1), so as to obtain the target organic electrolyte that can be used for supercapacitors.

[0028] Phosphorous and nitrogen-containing ionic liquid 1: R1=CH 3 ;R2=CH 3 ;R3=CH 3； R4=CH 3 ;R5=CH 3 ;R6=CH 3 ;R7=nC 4 h 9 ;A=(SF 3 SO 2 ) 2 N (1-1)

[0029] Phosphorous and nitrogen-containing ionic liquid 2: R1=CH 3 ;R2=CH 3 ;R3=CH 3； R4=CH 3 ;R5=CH 3 ;R6=CH 3 ;R7=nC 4 h 9 ;A=BF4(1-2)

[0030] Phosphorous and nitrogen-containing ionic liquid 3: R1=CH 3 ;R2=CH 3 ;R3=CH 3； R4=CH 3 ;R5=CH 3 ;R6=CH 3 ;R7=nC 4h 9 ;A=PF6(1-3)

[0031] Phosphorous and nitrogen-containing ionic liquid 4: R1=CH3; R2=nC4H9; R3=nC4H9; R4=CH3; ...

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Abstract

The invention relates to a fire-retardant super capacitor electrolyte, which is characterized by being composed of electrolyte salt, a non-aqueous organic solvent and at least one phosphorus and nitrogen-containing ionic liquid, wherein the total weight ratio of the phosphorus and nitrogen-containing ionic liquid to the electrolyte is 2 to 30%; the general formula I of the phosphorus and nitrogen-containing ionic liquid is shown as in the specifications, R1, R2, R3, R4, R5 and R6 are independent alkyl CnH2n+1, R7 is independent alkyl CnH2n+1 or independent alkoxy OCnH2n+1, and n is an integer between 1 to 5; A is BF4, PF6 and (CF3SO2)2N; and the electrolyte salt is ammonium salt or a mixture of the ammonium salt and lithium salt. The super capacitor electrolyte is fire-retardant and does not influence electrochemical performance of the capacitor, the electrolyte can be used in high voltage (more than 3.0V), and the super capacitor has a higher energy density and safety performance.

Description

technical field [0001] The invention belongs to the field of new energy storage, relates to an electrolyte for a supercapacitor, studies a flame-retardant electrolyte to solve the safety problem of a supercapacitor, and can be used under a relatively high working voltage, and specifically relates to a flame-retardant supercapacitor electrolyte. Background technique [0002] Among a series of energy storage technologies, supercapacitors are known as a strong candidate for the next generation of new energy storage devices due to their fast charge and discharge rates, environmental friendliness, and long life. At present, it has been widely used in energy systems such as hybrid electric vehicles, backup power supplies for large equipment, vehicle starting devices, and wind power generation, and has broad application prospects. [0003] Electrolyte is an important part of supercapacitors. Electrolyte stability, decomposition voltage, ion diameter, electronegativity, etc. are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/64
CPCY02E60/13H01G11/64
Inventor 陈建生彭劝宋善林陈文俊
Owner 湖北诺邦科技股份有限公司
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