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Preparation method of boron ionic liquid containing super capacitor

A technology of supercapacitors and boron ions, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrolytes, etc., to achieve good safety and stability, and improve the effect of energy storage

Active Publication Date: 2015-06-10
NANCHANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of organic solvent electrolyte also brings safety issues and attracts the attention of consumers, that is, in extreme conditions such as collision, extrusion, abnormal charge and discharge, etc., unsafe behaviors such as burning occur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The lithium salt and propylene urea were fully dried, weighed in an argon atmosphere in a glove box according to a molar ratio of 0.12, and mixed samples were placed in a reaction flask. The stirring speed is 40 r / min, the heating temperature is 60 degrees Celsius, and the heating time is 15 minutes. The supercapacitor assembled with the ionic liquid electrolyte has an energy density of 31Wh / kg, a 0.5A / g cycle of 10,000 cycles, and a capacity retention of 68%.

Embodiment 2

[0021] Fully dry the lithium salt and urea, weigh them in an argon atmosphere in a glove box according to the molar ratio of 0.12, and mix the samples in a reaction bottle. The stirring speed is 20 r / min, the heating temperature is 50 degrees Celsius, and the heating time is 60 minutes. The supercapacitor assembled with the ionic liquid electrolyte has an energy density of 34Wh / kg, a 0.5A / g cycle of 10,000 cycles, and a capacity retention of 68%.

Embodiment 3

[0023] The lithium salt and ethylene urea were fully dried, weighed in an argon atmosphere in a glove box according to a molar ratio of 0.18, and mixed samples in a reaction bottle. The stirring speed is 60 r / min, the heating temperature is 90 degrees Celsius, and the heating time is 10 minutes. The supercapacitor assembled with the ionic liquid electrolyte has an energy density of 37Wh / kg, a 0.5A / g cycle of 10,000 cycles, and a capacity retention of 72%.

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PUM

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Abstract

The invention discloses a preparation method of a boron ionic liquid containing super capacitor. The method comprises the steps of weighing boron-containing lithium salt and an organic compound according to the mixing ratio under an argon atmosphere condition in a gloves box; agitating and heating to obtain a stable, uniform and transparent ionic liquid solution; assembling prepared active carbon electrodes into the super capacitor. The method has the advantages that the lithium ion liquid electrolyte is high in safety and stability; in addition, no additives are added; the high electrochemical voltage is able to increase the energy storage of the super capacitor on the premise that the high energy density and circulating performance are remained.

Description

technical field [0001] The invention relates to the field of electrochemical new energy, in particular to a method for preparing a boron-containing ionic liquid supercapacitor. Background technique [0002] Supercapacitor is a new type of green energy storage energy between physical power supply and chemical power supply, which stores energy at the interface between electrode materials and electrolytes. Its fundamental advantage lies in its electric double layer charge energy storage, which is different from chemical power batteries. There is no bulk phase change caused by chemical reactions, and it can achieve hundreds of thousands of charge and discharge cycles (10 5 - 10 6 ) times, it can fundamentally solve the problem of short battery cycle life, so the application prospect of supercapacitors will be very broad. [0003] At present, due to the disadvantage of low voltage of water-based supercapacitors, the research and development of supercapacitors using organic sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/84H01G11/58
CPCY02E60/13H01G11/84H01G11/58
Inventor 杨震宇陈正煜谢宇古宁宇张宁
Owner NANCHANG UNIV
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