CN104876276A - Preparation method of supercapacitor electrode material LaMnO3 - Google Patents
Preparation method of supercapacitor electrode material LaMnO3 Download PDFInfo
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- CN104876276A CN104876276A CN201510184687.3A CN201510184687A CN104876276A CN 104876276 A CN104876276 A CN 104876276A CN 201510184687 A CN201510184687 A CN 201510184687A CN 104876276 A CN104876276 A CN 104876276A
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Abstract
The invention discloses a preparation method of a supercapacitors electrode material LaMnO3, belonging to the technical field of synthesis of supercapacitor electrode materials. The technical scheme is as follows: the preparation method comprises the following steps: dissolving lanthanum nitrate hexahydrate, a 50 wt% manganous nitrate solution and citric acid monohydrate in water to obtain a mixed solution; and (2) heating the mixed solution in an 80-DEG C water bath to a dried gel state, drying in a vacuum drying oven at 180 DEG C for 30 hours, cooling to room temperature, and calcining at 300-1000 DEG C for 1-10 hours to obtain the supercapacitor electrode material LaMnO3. The LaMnO3 electrode material has favorable electrochemical stability, is an excellent supercapacitor electrode material, has the advantages of simple preparation method, cheap raw materials and environment friendliness, and solves the problem of application of the supercapacitor electrode material LaMnO3 in large-scale production.
Description
Technical field
The invention belongs to the synthesis technical field of electrode material for super capacitor, be specifically related to a kind of electrode material for super capacitor LaMnO
3preparation method.
Background technology
The exhaustion of original energy has expedited the emergence of the Devoting Major Efforts To Developing of the mankind to new forms of energy, study a kind of efficiently, the Conversion of energy of low cost and stocking system more and more important.Wherein ultracapacitor is a kind of energy storage device having more high power density than traditional battery, because it has the good characteristics such as high-energy-density, duration of charging short and longer cycle life, be widely used in the occasion that Digital Video, uninterruptible power supply, solar charger, warning device etc. require abrupt release super-large current, especially have extremely wide application prospect in fields such as electromobiles.
The electrode materials of current research ultracapacitor mainly comprises three types: carbon material, metal oxide materials and conductive polymer electrodes material.RuO in numerous metal oxide materials
2have excellent ratio capacitance performance, but have toxicity because of expensive, its popularization is restricted, and environmental protection and inexpensive electrode materials are necessary very much again thus to seek excellent performance.Lanthanum manganate (LaMnO
3) have special structure and store principle, can be used for the electrode materials of ultracapacitor, external " nature-material " has in 2014 the LaMnO reporting and prepared for electrode material for super capacitor
3, this report have employed the multiple organic reagent such as 4-propyl bromide and Tetramethylammonium hydroxide, and again not environmentally, and its preparation method is comparatively complicated for expensive starting materials, and these features make it be limited in actual applications.
Summary of the invention
The technical problem that the present invention solves there is provided a kind of electrode material for super capacitor LaMnO
3preparation method, this preparation method synthesizes LaMnO in simple water system
3electrode materials, significantly improves LaMnO
3the ratio capacitance of electrode materials and electrochemical stability, simultaneously it is simple to operate and be easy to scale operation.
The present invention adopts following technical scheme, a kind of electrode material for super capacitor LaMnO for solving the problems of the technologies described above
3preparation method, it is characterized in that comprising the following steps: (1) is by lanthanum nitrate hexahydrate (La (NO
3)
3 .6H
2o), mass concentration is the manganous nitrate (Mn (NO of 50%
3)
2) solution and Citric acid monohydrate Food grade (C
6h
8o
7 .h
2o) soluble in waterly obtain mixing solutions, wherein the mol ratio of lanthanum nitrate hexahydrate, manganous nitrate and Citric acid monohydrate Food grade is 1:1:1-2; (2) above-mentioned mixing solutions is heated to xerogel state in the water-bath of 80 DEG C, is then placed in vacuum drying oven in 180 DEG C of dry 30h, after being cooled to room temperature, obtain electrode material for super capacitor LaMnO in 300-1000 DEG C of calcining 1-10h
3.
Further preferably, the calcining temperature in step (2) is 600-700 DEG C.
LaMnO obtained by the present invention
3electrode materials has good electrochemical stability, is a kind of excellent electrode material for super capacitor, has that preparation method is simple, cheaper starting materials and an eco-friendly advantage, solves for electrode material for super capacitor LaMnO
3an application difficult problem in scale operation.
Accompanying drawing explanation
Fig. 1 is obtained electrode material for super capacitor LaMnO
3x ray diffracting spectrum; Fig. 2 is obtained electrode material for super capacitor LaMnO
3the electrochemical property test curve of made electrode.
Embodiment
Be described in further details foregoing of the present invention by the following examples, but this should be interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following embodiment, all technology realized based on foregoing of the present invention all belong to scope of the present invention.
Embodiment 1
(1) lanthanum nitrate hexahydrate (La (NO is taken
3)
3 .6H
2o) 8.6602g, mass concentration are the manganous nitrate (Mn (NO of 50%
3)
2) solution 7.158g and Citric acid monohydrate Food grade (C
6h
8o
7 .h
2o) 8.405g, joins in 100mL water and stirring and dissolving obtains mixing solutions;
(2) above-mentioned mixing solutions is heated 6h in the water-bath of 80 DEG C, be then placed in vacuum drying oven in 180 DEG C of dry 30h, after being cooled to room temperature, obtain electrode material for super capacitor LaMnO in 500 DEG C of calcining 4h
3.
Embodiment 2
(1) lanthanum nitrate hexahydrate (La (NO is taken
3)
3 .6H
2o) 8.6602g, mass concentration are the manganous nitrate (Mn (NO of 50%
3)
2) solution 7.158g and Citric acid monohydrate Food grade (C
6h
8o
7 .h
2o) 8.405g, joins in 100mL water and stirring and dissolving obtains mixing solutions;
(2) above-mentioned mixing solutions is heated 6h in the water-bath of 80 DEG C, be then placed in vacuum drying oven in 180 DEG C of dry 30h, after being cooled to room temperature, obtain electrode material for super capacitor LaMnO in 600 DEG C of calcining 4h
3.
Embodiment 3
(1) lanthanum nitrate hexahydrate (La (NO is taken
3)
3 .6H
2o) 8.6602g, mass concentration are the manganous nitrate (Mn (NO of 50%
3)
2) solution 7.158g and Citric acid monohydrate Food grade (C
6h
8o
7 .h
2o) 8.405g, joins in 100mL water and stirring and dissolving obtains mixing solutions;
(2) above-mentioned mixing solutions is heated 6h in the water-bath of 80 DEG C, be then placed in vacuum drying oven in 180 DEG C of dry 30h, after being cooled to room temperature, obtain electrode material for super capacitor LaMnO in 700 DEG C of calcining 4h
3.
As seen from Figure 1, LaMnO
3electrode materials starts to form LaMnO 600 DEG C time
3phase, although degree of crystallinity is now not high, crystallization phases is to complete.As seen from Figure 2, at the LaMnO that different temperature calcination obtains
3in electrode materials, 600 DEG C of calcining gained LaMnO
3the ratio capacitance of electrode materials is maximum.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within scope.
Claims (2)
1. an electrode material for super capacitor LaMnO
3preparation method, it is characterized in that comprising the following steps: lanthanum nitrate hexahydrate, mass concentration are the manganese nitrate solution of 50% and Citric acid monohydrate Food grade is soluble in water obtains mixing solutions by (1), and wherein the mol ratio of lanthanum nitrate hexahydrate, manganous nitrate and Citric acid monohydrate Food grade is 1:1:1-2; (2) above-mentioned mixing solutions is heated to xerogel state in the water-bath of 80 DEG C, is then placed in vacuum drying oven in 180 DEG C of dry 30h, after being cooled to room temperature, obtain electrode material for super capacitor LaMnO in 300-1000 DEG C of calcining 1-10h
3.
2. electrode material for super capacitor LaMnO according to claim 1
3preparation method, it is characterized in that: the calcining temperature in step (2) is 600-700 DEG C.
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|---|---|---|---|
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| CN201510184687.3A CN104876276A (en) | 2015-04-20 | 2015-04-20 | Preparation method of supercapacitor electrode material LaMnO3 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107128977A (en) * | 2017-04-27 | 2017-09-05 | 东南大学 | A kind of preparation method of capacitor electrode material non-stoichiometry lanthanum manganate |
| CN110033958A (en) * | 2019-03-13 | 2019-07-19 | 浙江理工大学 | LaMnO3Base composite and flexible electrode material, preparation method and application |
| CN113433187A (en) * | 2021-07-01 | 2021-09-24 | 常州大学 | LaMnO3Electrochemical sensor of chitosan non-enzymatic hydrogen peroxide and preparation method thereof |
| CN113808856A (en) * | 2021-08-13 | 2021-12-17 | 常州大学 | Honeycomb-shaped LaMnO3Preparation method of super capacitor |
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|---|---|---|---|---|
| CN100558645C (en) * | 2007-08-08 | 2009-11-11 | 中北大学 | Ultra-fine perovskite type LaFeO 3And LaMnO 3A kind of preparation method |
| US20100233045A1 (en) * | 2009-03-16 | 2010-09-16 | Gm Global Technology Operations, Inc. | Sulfur tolerant perovskite supported catalysts |
| CN101979327A (en) * | 2010-09-21 | 2011-02-23 | 北京工业大学 | Method for preparing perovskite oxide LaMnO3 hollow spheres |
| CN102324322A (en) * | 2011-09-30 | 2012-01-18 | 河南煤业化工集团研究院有限责任公司 | Preparation method of rare earth doped LiNi0.5 Mn1.5O4 as anode material for super capacitor |
-
2015
- 2015-04-20 CN CN201510184687.3A patent/CN104876276A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100558645C (en) * | 2007-08-08 | 2009-11-11 | 中北大学 | Ultra-fine perovskite type LaFeO 3And LaMnO 3A kind of preparation method |
| US20100233045A1 (en) * | 2009-03-16 | 2010-09-16 | Gm Global Technology Operations, Inc. | Sulfur tolerant perovskite supported catalysts |
| CN101979327A (en) * | 2010-09-21 | 2011-02-23 | 北京工业大学 | Method for preparing perovskite oxide LaMnO3 hollow spheres |
| CN102324322A (en) * | 2011-09-30 | 2012-01-18 | 河南煤业化工集团研究院有限责任公司 | Preparation method of rare earth doped LiNi0.5 Mn1.5O4 as anode material for super capacitor |
Non-Patent Citations (1)
| Title |
|---|
| 牛新书等: "柠檬酸络合法制备LaMnO3及其光催化活性研究", 《稀土》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107128977A (en) * | 2017-04-27 | 2017-09-05 | 东南大学 | A kind of preparation method of capacitor electrode material non-stoichiometry lanthanum manganate |
| CN110033958A (en) * | 2019-03-13 | 2019-07-19 | 浙江理工大学 | LaMnO3Base composite and flexible electrode material, preparation method and application |
| CN110033958B (en) * | 2019-03-13 | 2021-10-12 | 浙江理工大学 | LaMnO3Base composite flexible electrode material, preparation method and application |
| CN113433187A (en) * | 2021-07-01 | 2021-09-24 | 常州大学 | LaMnO3Electrochemical sensor of chitosan non-enzymatic hydrogen peroxide and preparation method thereof |
| CN113808856A (en) * | 2021-08-13 | 2021-12-17 | 常州大学 | Honeycomb-shaped LaMnO3Preparation method of super capacitor |
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