A kind of flame retardant supercapacitor 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: 2018-09-28
湖北诺邦科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of flame retardant supercapacitor electrolyte

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Embodiment 1～12

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

[0028] Phosphorus-containing nitrogen ionic liquid 1: R 1 =CH 3 ; R 2 =CH 3 ; R 3 =CH 3; R 4 =CH 3 ; R 5 =CH 3 ; R 6 =CH 3 ; R 7 =nC 4 H 9 ; A=(SF 3 SO 2 ) 2 N (1-1)

[0029] Phosphorus-containing nitrogen ionic liquid 2: R 1 =CH 3 ; R 2 =CH 3 ; R 3 =CH 3; R 4 =CH 3 ; R 5 =CH 3 ; R 6 =CH 3 ; R 7 =nC 4 H 9 ; A=BF4 (1-2)

[0030] Phosphorus and nitrogen ionic liquid 3: R 1 =CH 3 ; R 2 =CH 3 ; R 3 =CH 3; R 4 =CH 3 ; R 5 =CH 3 ; R 6 =CH 3 ; R 7 =nC 4 H 9 ; A=PF6(1-3)

[0031] Phosphorus-containing nitrogen ionic liquid 4: R 1 =CH3; R 2 = nC4H9; R 3 = nC4H9; R 4 =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 electrolytes for supercapacitors, studies flame-retardant electrolytes to solve the safety problems of supercapacitors, and can be used at higher working voltages, and specifically relates to a flame-retardant supercapacitor Electrolyte. Background technique [0002] Among a series of energy storage technologies, supercapacitors are known as powerful candidates for the next generation of new energy storage devices due to their fast charge and discharge rate, 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-scale equipment, automobile 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 important performa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/64
CPCY02E60/13
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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