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A supercapacitor based on porous strontium lanthanum cobaltate substrate loaded with silver nanoparticles

A supercapacitor, strontium lanthanum cobaltate technology, applied in the field of high-performance supercapacitors, can solve the problems that affect the wide application of supercapacitors, limit the loading capacity of active materials, and the high cost of noble metal substrates, so as to increase the reactive area and active sites , strong cycle stability and stable load

Active Publication Date: 2018-06-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of precious metal substrates is high, other metals are prone to corrosion, and carbon paper has poor wettability with most supercapacitor active materials, which limits the loading capacity of active materials
These problems have seriously affected the wide application of supercapacitors

Method used

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  • A supercapacitor based on porous strontium lanthanum cobaltate substrate loaded with silver nanoparticles
  • A supercapacitor based on porous strontium lanthanum cobaltate substrate loaded with silver nanoparticles
  • A supercapacitor based on porous strontium lanthanum cobaltate substrate loaded with silver nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Electrode material Ag / La 0.7 Sr 0.3 CoO 3‐δ (La 0.7 Sr 0.3 CoO 3‐δ , x=0.3, referred to as: LSC0.3) preparation: first lanthanum oxide (La 2 o 3 , Sinopharm Chemical Reagent Co., Ltd., high-purity) calcined in the air at 1000°C for 2h to remove the moisture; then the calcined La 2 o 3 with strontium carbonate (SrCO 3 , Guangzhou Chemical Reagent Factory, analytically pure), tricobalt tetroxide (Co 3 o 4 , Aladdin, analytically pure), according to La 0.7 Sr 0.3 CoO 3‐δ The stoichiometric ratio in the mixture was weighed in turn, put into a 100ml ball mill jar, and an appropriate amount of absolute ethanol (CH 3 CH 2 OH, Tianjin Fuyu Fine Chemical Co., Ltd., analytically pure), ball milled for 11 h, and then dried under an infrared lamp to obtain a gray powder. The gray powder was placed in a high temperature furnace, calcined in air at 1000°C for 11 h, and cooled naturally to room temperature to obtain a black powder. This powder is carried out X-ray ...

Embodiment 2

[0066] (1) Cathode material Ag / LaCoO 3 (La 1‐x Sr x CoO 3‐δ , x=0) preparation: first La 2 o 3 Calcined at 1000°C for 4h to remove the moisture; then the calcined La 2 o 3 , with Co 3 o 4 According to LaCoO 3 Weigh the stoichiometric ratio in sequence, put it into a 100ml ball mill jar, add an appropriate amount of CH 3 CH 2 OH, ball milled for 6h, and then dried under an infrared lamp to obtain a gray powder. Put the gray powder in a high-temperature furnace, calcinate it in the air at 900 °C for 11 h, and cool it down to room temperature naturally to obtain black LaCoO 3 powder. The prepared LaCoO 3 Add the powder into the ball mill jar, and then add 25% (accounting for LaCoO 3 mass fraction) of soluble starch as a pore-forming agent, CH 3 CH 2 OH was used as a solvent, and after ball milling for 50 min, it was dried under an infrared lamp, and after drying, 3% (accounting for LaCoO 3 The total mass fraction of powder and starch) polyvinyl butyral as a binde...

Embodiment 3

[0072] (1) Electrode material Ag / La 0.5 Sr 0.5 CoO 3‐δ (La 1‐x Sr x CoO 3‐δ , x=0.5, referred to as: LSC0.5) preparation: first La 2 o 3 Calcined at 1100°C for 3h to remove the moisture; then the calcined La 2 o 3 , with SrCO 3 、Co 3 o 4 According to La 0.5 Sr 0.5 CoO 3‐δ Weigh the stoichiometric ratio in sequence, put it into a 100ml ball mill jar, add an appropriate amount of CH 3 CH 2 OH, ball milled for 20 hours, and then dried under an infrared lamp to obtain a gray powder. Place the gray powder in a high-temperature furnace, calcinate at 1000°C for 9 hours, and cool down to room temperature naturally to obtain black LSC0.5 powder. Add the prepared LSC0.5 powder into the ball mill jar, and then add 10% (accounting for the mass of LSC0.5 powder) soluble starch as a pore-forming agent, CH 3 CH 2 OH was used as a solvent, and after ball milling for 50 minutes, it was dried under an infrared lamp. After drying, 5% (accounting for the total mass fraction of L...

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Abstract

The invention discloses a supercapacitor based on silver nanoparticles loaded on a porous cobalt strontium lanthanum oxide substrate. The supercapacitor comprises leads, a charge collector, a positive electrode material, a diaphragm and a negative electrode material; at least one of the positive electrode material and the negative electrode material is an electrode material formed by the silver nanoparticles loaded on the porous cobalt strontium lanthanum oxide substrate; the preparation comprises the steps of preparing a cobalt strontium lanthanum oxide ceramic powder material firstly by adopting a ceramic method; adding the prepared cobalt strontium lanthanum oxide ceramic powder material into a ball milling tank, and then adding a pore forming agent and a solvent, and performing ball milling and drying, and carrying out calcining on a formed blank at a temperature of 900-1,100 DEG C for 4-15h to prepare the porous cobalt strontium lanthanum oxide substrate; and impregnating an AgNO<3> solution, and loading the silver nanoparticles, and performing vacuum drying and then calcining. The supercapacitor disclosed by the invention has the characteristics of high specific capacity, wide potential window, high energy density, high stability and the like, as well as the advantages of high safety, low cost, environment protection and no pollution, and the like.

Description

technical field [0001] The invention relates to the technical field of supercapacitors, in particular to a high-performance supercapacitor based on porous strontium lanthanum cobaltate loaded with silver nanoparticles as electrodes. Background technique [0002] Today, with the improvement of living standards, rapid economic development and increasingly serious environmental pollution, people's demand for energy storage equipment is becoming more and more urgent. Among many energy storage devices, supercapacitors, which have the advantages of high power density, long service life, fast charging and discharging, and good safety, have attracted much attention. [0003] According to the principle of energy storage, supercapacitors can be divided into three categories: electric double layer capacitors, pseudocapacitive capacitors, and asymmetric capacitors (also known as hybrid capacitors). The electric double layer capacitor stores energy through the electric double layer form...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/46
CPCY02E60/13
Inventor 刘江刘佩佩张亚鹏周倩王晓强刘美林
Owner SOUTH CHINA UNIV OF TECH
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