Electrolyte solution for double layer capacitor and preparation method thereof

Abstract

The invention discloses an electrolyte solution for double-layer capacitors, the electrolyte solution for double-layer capacitors comprises morpholine ionic liquid and polyoxyethylene alkanolamide, the morpholine ionic liquid and polyoxyethylene alkyl alcohol The mass ratio of amides is 1:0.001 to 1:0.05. The invention also discloses a preparation method of the electrolytic solution for double-layer capacitors. The invention can greatly reduce the equivalent internal resistance of the electric double layer capacitor.

Description

technical field

[0001] The invention relates to an electrolyte solution and a preparation method thereof, in particular to an electrolyte solution for double-layer capacitors and a preparation method thereof. Background technique

[0002] Double layer capacitor is a new type of energy storage device, which has the advantages of high power density, high cycle life, and fast charge and discharge performance. It is widely used in military fields, mobile communication devices, computers, and hybrid power supplies for electric vehicles. As an important part of electric double layer capacitors, the electrolyte has a great influence on the storage performance of electric double layer capacitors, which determines the equivalent internal resistance, working voltage range, storage capacity, working temperature and working environment of the capacitor.

[0003] Ionic liquids are organic liquid substances composed entirely of ions at or near room temperature. As a new type of electroly...

Examples

Embodiment 1

[0021] In a glove box (that is, in the absence of oxygen and water and protected by an inert gas), the mass ratio of methyl ethyl morpholine tetrafluoroborate and polyoxyethylene butylated acyl alcohol amine is 1:0.04 After mixing and stirring for 60 minutes, the polyoxyethylene butane acyl alcohol amine is uniformly dispersed in the methyl ethyl morpholine tetrafluoroborate to obtain an electrolyte solution for an electric double layer capacitor.

[0022] The parameters of Examples 2 to 20 are different from those of Example 1, but the preparation method steps and test conditions are the same as those of Example 1, see Table 1 below.

[0023] Table 1

[0024]

[0025]

[0026] Note: In this table, the reduction ratio of the equivalent internal resistance is the ratio of the equivalent internal resistance of the electric double-layer capacitor using the electrolyte of this embodiment measured under the same conditions in the corresponding embodiment without adding polyox...

technical field

[0001] The invention relates to an electrolyte solution and a preparation method thereof, in particular to an electrolyte solution for double-layer capacitors and a preparation method thereof. Background technique

[0002] Double layer capacitor is a new type of energy storage device, which has the advantages of high power density, high cycle life, and fast charge and discharge performance. It is widely used in military fields, mobile communication devices, computers, and hybrid power supplies for electric vehicles. As an important part of electric double layer capacitors, the electrolyte has a great influence on the storage performance of electric double layer capacitors, which determines the equivalent internal resistance, working voltage range, storage capacity, working temperature and working environment of the capacitor.

[0003] Ionic liquids are organic liquid substances composed entirely of ions at or near room temperature. As a new type of electroly...

Examples

Embodiment 1

[0021] In a glove box (that is, in the absence of oxygen and water and protected by an inert gas), the mass ratio of methyl ethyl morpholine tetrafluoroborate and polyoxyethylene butylated acyl alcohol amine is 1:0.04 After mixing and stirring for 60 minutes, the polyoxyethylene butane acyl alcohol amine is uniformly dispersed in the methyl ethyl morpholine tetrafluoroborate to obtain an electrolyte solution for an electric double layer capacitor.

[0022] The parameters of Examples 2 to 20 are different from those of Example 1, but the preparation method steps and test conditions are the same as those of Example 1, see Table 1 below.

[0023] Table 1

[0024]

[0025]

[0026] Note: In this table, the reduction ratio of the equivalent internal resistance is the ratio of the equivalent internal resistance of the electric double-layer capacitor using the electrolyte of this embodiment measured under the same conditions in the corresponding embodiment without adding polyox...

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