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Methods of enhancing electrochemical double layer capacitor (EDLC) performance and EDLC devices formed therefrom

A double-layer capacitor, electrochemical technology, applied in the manufacture of hybrid/electric double-layer capacitors, protection/regulation of hybrid/electric double-layer capacitors, battery circuit devices, etc., can solve the problems of shortening the life of EDLC, shortening the life of EDLC, etc., to achieve The effect of increasing life and enhancing performance stability

Inactive Publication Date: 2016-03-02
伊赛欧尼克公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for every 100mV increase in the nominal voltage above the nominal voltage, the increase in the operating voltage will generally shorten the life of the EDLC by about 1 / 2 (or about 50%)
For every 10°C increase in temperature, the life of EDLC is also shortened by about 1 / 2

Method used

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  • Methods of enhancing electrochemical double layer capacitor (EDLC) performance and EDLC devices formed therefrom
  • Methods of enhancing electrochemical double layer capacitor (EDLC) performance and EDLC devices formed therefrom
  • Methods of enhancing electrochemical double layer capacitor (EDLC) performance and EDLC devices formed therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0362] Preparation of phosphonium ionic liquids. AgSO 3 CF 3 Fill a 50ml round bottom (Rb) flask and fit to a 3cm swivel frit. Evacuate the flask and place it in the glove box. In the glove box, di-n-propylethylmethylphosphonium iodide was added and the flask was reassembled, a vacuum line was connected, evacuated, and anhydrous THF was transferred thereto under reduced pressure. The flask can be warmed to room temperature and then to 40°C for 2 hours. This resulted in the formation of a pale green bead solid. The solid was removed by filtration. This produced a pearly, milky white solution. Volatile material was removed under high vacuum and heated using a 30°C hot water bath. This resulted in 0.470 g of white crystalline material. The material was subjected to thermogravimetric analysis (TGA) and Figure 7 The results are shown in .

Embodiment 2

[0364] Additional phosphonium ionic liquids were prepared. Di-n-propylethylmethylphosphonium iodide was charged to a 100 ml Rb flask in the glove box, then removed and dissolved in 50 ml DIH 2 O middle. AgO 2 CCF 3 Addition of this solution immediately produced a yellow, beaded precipitate. After stirring for 2 hours, AgI was removed by filtration and washed with 5 ml of DIH 2 O Wash the filter cake three times. The gravity water was removed on a rotary evaporator. This then yielded a clear low viscosity liquid which was dried under high vacuum with heating and stirring. This results in solidification of the material. Gentle warming of the white solid in a warm water bath yielded a liquid that appeared to be melting above room temperature. This experiment yielded 0.410 g of material. exist Figure 8A The reaction scheme is described in . Thermogravimetric analysis (TGA) and escape gas analysis (EGA) were performed on the material and in Figure 8B and Figure 8C T...

Embodiment 3

[0366] In this example, di-n-propylethylmethylphosphonium iodide was added to a 100 ml Rb flask in the glove box and then removed to a fume hood and dissolved in 70 ml MeOH. Next, add AgO 2 CCF 2 CF 2 CF 3 , a yellow colored slurry was produced immediately. After 3 hours of stirring the solids were removed by filtration, the bulk MeOH was removed by rotary evaporation and the remaining residue was dried under high vacuum. This produced a yellow gelatinous slurry material. When "melting" off via scraping of the flask, a "liquid" type crystal was observed to form at the rim of the Rb flask. This experiment yielded 0.618 g of material. The material was subjected to thermogravimetric analysis (TGA) and Figure 9A The results are shown in . Evolved Gas Analysis (EGA) was also performed and at Figure 9B The results are shown in .

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PUM

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Abstract

The invention broadly encompasses energy storage devices or systems and more specifically relates to methods of enhancing the performance of electrochemical double layer capacitors (EDLCs), or supercapacitors or ultracapacitors, and devices formed therefrom. In some embodiments, the invention relates generally to energy storage devices, such as EDLCs that use phosphonium-based electrolytes and methods for treating such devices to enhance their performance and operation. Embodiments of the invention further encompass conventional ammonium based electrolytes and phosphonium-based electrolytes comprised of phosphonium ionic liquids, salts, and compositions employed in such EDLCs.

Description

technical field [0001] The present invention broadly includes energy storage devices or systems and more particularly relates to methods of enhancing the performance of electrochemical double layer capacitors (EDLCs) or ultracapacitors or ultracapacitors, and devices formed thereby. In some embodiments, the present invention generally relates to energy storage devices, such as EDLCs, using conventional ammonium-based or phosphonium-based electrolytes, and methods for treating such devices to enhance their performance and operation. Background technique [0002] An electrochemical double layer capacitor (EDLC), also known as an electrochemical capacitor or supercapacitor or supercapacitor, is an electrochemical cell that stores energy through charge separation at the interface between electrodes and electrolyte. An EDLC consists of 2 porous electrodes, an electronically insulating separator that isolates the 2 electrodes from electrical contact with each other, and an electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/84H01G11/22
CPCH01G11/04H01G11/14H01G11/60H01G11/62Y02E60/13Y02T10/70H02J7/00
Inventor 韦恩·L·杰莱特本杰明·L·鲁珀特利安娜·比尔什尔帕·A·沃利卡石志超
Owner 伊赛欧尼克公司
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