CN102786093A - Preparation method for supercapacitor electrode material MnO2 - Google Patents
Preparation method for supercapacitor electrode material MnO2 Download PDFInfo
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- CN102786093A CN102786093A CN 201110125218 CN201110125218A CN102786093A CN 102786093 A CN102786093 A CN 102786093A CN 201110125218 CN201110125218 CN 201110125218 CN 201110125218 A CN201110125218 A CN 201110125218A CN 102786093 A CN102786093 A CN 102786093A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
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Abstract
The present invention provides a preparation method for a supercapacitor electrode material MnO2. The method concretely comprises: adopting a citric acid sol-gel method to prepare a nano-MnO2 material, and studying influence on a sample due to different calcination temperatures and heat preservation times. Results of XRD analysis and SEM analysis show that: low valence manganese oxides (MnO2 and MnO2) are obtained with calcination at different temperatures (350-500 DEG C), and M'' valence oxides can be obtained with an acidification treatment; after calcination is performed for a short time, the sample has characteristics of small particle and large specific surface area, and results of cyclic voltammetry and constant current charge/discharge tests show that the sample with a 3 hour heat preservation treatment has a good capacitance characteristic. In addition, results show that the prepared MnO2 electrode material has good electrochemical performance, and is suitable for a supercapacitor electrode material. The preparation method for the supercapacitor electrode material MnO2 is characterized in that: 1, a dry gel is calcined at different temperatures to obtain low valence manganese, and then an acidification treatment is performed to obtain MnO2; 2, a calcination heat preservation time affects electrochemical properties of the sample, wherein the prepared MnO2 with a 3 hour heat preservation treatment has a good capacitance characteristic, and electrochemical performances are excellent.
Description
Technical field
The present invention relates to a kind of electrode materials MnO
2The preparation method, especially a kind of electrode material for super capacitor MnO
2The preparation method.
Background technology
Ultracapacitor is claimed capacitor with super capacity or electrochemical capacitor again, is a kind of novel energy-storing element between conventional electrostatic electrical condenser and battery.The energy of ultracapacitor storage can reach more than 10 times of electrostatic condenser; Have again simultaneously and exceed 10 to 100 times power density than battery "; but the especially big electric current of abrupt release; have duration of charging weak point, charging efficiency high and low temperature superior performance, recycle that the life-span is grown and characteristics such as memory-less effect, very wide application prospect is arranged.
Ultracapacitor can be divided into two kinds by energy storage mechanism: a kind of electrode that is based on, and the electric double layer capacitance electrical condenser that the electrolyte interface chargeseparated is produced, its gac with high-specific surface area that adopt is made electrode materials more; A kind of in addition ultracapacitor not only utilizes electrode, the electric double layer capacitance on the electrolyte interface, and utilize the surface of electrode and the middle mutually quick reversible redox reaction that takes place of body to form Faraday pseudo-capacitance.The raw material of wood-charcoal material has higher resistance, has limited the application of double layer capacitor.In recent years, more about the research of faraday's waist electrical condenser.Its metal oxide containing precious metals such as ruthenium oxide, iridium oxide that adopt is made electrode materials more, and wherein the specific storage of Ruoz ultracapacitor is up to 760F/g31, but costing an arm and a leg of metal oxide containing precious metals such as Ruoz, IrO2 is difficult for realizing commercialization.Because transition metal oxides such as nickel oxide, oxidation brill and manganese oxide have the character similar with RuO2; Therefore extremely researchist's concern; Wherein the specific storage of nickel oxide and powder blue can reach 200-300F, and g. is their potential window relative narrower (about 0.5V) still. and energy density is lower.
The manganese oxide resource is extensive; Cheap; Environment is friendly; Have multiple oxidation valence state, be widely used in the manganese oxide electrode materials that battery electrode material and oxidation catalyst material sh be used for ultracapacitor at present and obtained very big progress, the investigator is studying the manganese oxide electrode that the several different methods preparation has good capacitance characteristic.Test adopts the Hydrocerol A sol-gel method to prepare manganese oxide, studies its capacitive property, constant current charge-discharge performance in alkaline electrolyte.
Summary of the invention
To the problems referred to above, the present invention provides a kind of electrode material for super capacitor MnO
2The preparation method.
The present invention provides a kind of electrode material for super capacitor MnO
2The preparation method, concrete adopt Hydrocerol A colloidal sol one to coagulate the chamber method to have prepared nanometer MnO
2Material is studied the influence to sample of different maturing temperatures and soaking time.XRD analysis and sem analysis are illustrated in roasting under the differing temps (350-500 ℃), that obtain is the Mn oxide Mn and the Mn of lower valency, can obtain M through the acidification " oxide compound of valence state; Roasting time more in short-term, the particle of sample is less, specific surface area is bigger, the sample that the test of cyclic voltammetric and constant current charge-discharge draws insulation 3h gained has capacitance characteristic preferably.The result shows, prepared MnO
2, electrode materials has good electrochemical, is suitable for doing electrode material for super capacitor.
Embodiment
The present invention provides a kind of electrode material for super capacitor MnO
2The preparation method, concrete adopt Hydrocerol A colloidal sol one to coagulate the chamber method to have prepared nanometer MnO
2Material is studied the influence to sample of different maturing temperatures and soaking time.That XRD analysis and sem analysis are illustrated in that roasting obtains under the differing temps (350-500 ℃) is the Mn oxide MnO of lower valency
2And MnO
2, " the oxide compound of valence state that can obtain M through acidification; Roasting time more in short-term, the particle of sample is less, specific surface area is bigger, the sample that the test of cyclic voltammetric and constant current charge-discharge draws insulation 3h gained has capacitance characteristic preferably.The result shows, prepared MnO
2, electrode materials has good electrochemical, is suitable for doing electrode material for super capacitor.A kind of electrode material for super capacitor MnO
2The preparation method, it is characterized in that: 1. xerogel roasting under differing temps obtains the manganese of lower valency, through acidification, can obtain Manganse Dioxide.2. roasting soaking time is influential to the chemical property of sample, insulation 3h gained MnO
2Have capacitance characteristic preferably, chemical property is more superior.
Claims (2)
1. electrode material for super capacitor MnO
2The preparation method, it is characterized in that: xerogel roasting under differing temps obtains the manganese of lower valency, through acidification, can obtain Manganse Dioxide.
2. according to claim 1, a kind of electrode material for super capacitor MnO
2The preparation method, it is characterized in that: the roasting soaking time is influential to the chemical property of sample, insulation 3h gained MnO
2Has capacitance characteristic preferably.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110125218 CN102786093A (en) | 2011-05-16 | 2011-05-16 | Preparation method for supercapacitor electrode material MnO2 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110125218 CN102786093A (en) | 2011-05-16 | 2011-05-16 | Preparation method for supercapacitor electrode material MnO2 |
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| Publication Number | Publication Date |
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| CN102786093A true CN102786093A (en) | 2012-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110125218 Pending CN102786093A (en) | 2011-05-16 | 2011-05-16 | Preparation method for supercapacitor electrode material MnO2 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9870960B2 (en) | 2014-12-18 | 2018-01-16 | International Business Machines Corporation | Capacitance monitoring using X-ray diffraction |
| KR20210024540A (en) * | 2018-06-25 | 2021-03-05 | 아이오닉 머터리얼스, 인코퍼레이션 | Manganese oxide composition of the material, its synthesis and use |
-
2011
- 2011-05-16 CN CN 201110125218 patent/CN102786093A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9870960B2 (en) | 2014-12-18 | 2018-01-16 | International Business Machines Corporation | Capacitance monitoring using X-ray diffraction |
| US10008421B2 (en) | 2014-12-18 | 2018-06-26 | International Business Machines Corporation | Capacitance monitoring using x-ray diffraction |
| KR20210024540A (en) * | 2018-06-25 | 2021-03-05 | 아이오닉 머터리얼스, 인코퍼레이션 | Manganese oxide composition of the material, its synthesis and use |
| KR102656109B1 (en) | 2018-06-25 | 2024-04-09 | 아이오닉 머터리얼스, 인코퍼레이션 | Manganese oxide composition of substances, its synthesis and uses |
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Application publication date: 20121121 |