CN108538620B - Mn (manganese) 3 O 4 -Fe 3 O 4 Preparation method and application of @ POPD bimetal oxide @ conductive polymer - Google Patents

Mn (manganese) 3 O 4 -Fe 3 O 4 Preparation method and application of @ POPD bimetal oxide @ conductive polymer Download PDF

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CN108538620B
CN108538620B CN201810225606.3A CN201810225606A CN108538620B CN 108538620 B CN108538620 B CN 108538620B CN 201810225606 A CN201810225606 A CN 201810225606A CN 108538620 B CN108538620 B CN 108538620B
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fecl
mncl
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phenylenediamine
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CN108538620A (en
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朱脉勇
陈齐
杨新花
李松军
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Jiangsu University
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22—Electrodes
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22—Electrodes
    • H01G11/30—Electrodes characterised by their material
    • H01G11/48—Conductive polymers
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Abstract

The invention belongs to the field of super capacitors and nano materials, and particularly relates to a preparation method of a Mn-Fe bimetal oxide @ conductive polymer nano composite material applied to a super capacitor. The composite material is made of FeCl 3 ·6H 2 O as iron source, mnCl 2 As a manganese source, o-phenylenediamine is used as a monomer of a conductive polymer, and Mn is obtained by direct one-pot reaction 3 O 4 ‑Fe 3 O 4 @ POPD composite material. And by varying Fe 3+ The electrochemical performance of the composite material, and the synergistic effect of Fe, mn and o-phenylenediamine are discussed. The results show that the proper amount of Fe 3+ Can ensure effective electron transmission, mass transmission and faster ion diffusion, and has excellent specific capacitance and good cycling stability.

Description

Mn (manganese) 3 O 4 -Fe 3 O 4 Preparation method and application of @ POPD bimetal oxide @ conductive polymer
Technical Field
The invention belongs to the field of supercapacitors, and particularly relates to Mn 3 O 4 -Fe 3 O 4 A method for preparing a @ poly-o-phenylenediamine nano composite material.
Background
In the 21 st century, people are facing the problem of shortage of traditional energy sources such as coal, oil and natural gas, and the development of novel energy sources such as solar energy, wind energy, nuclear energy and tidal energy is urgently required. Meanwhile, some new energy storage devices, such as solid-state batteries, super capacitors, etc., are also in use. The super capacitor is an electrochemical capacitor which makes up the disadvantages of low energy density of the traditional capacitor and low power density of the traditional storage battery, can be applied to aspects such as national defense science and technology, aerospace, electric automobiles and the like as a novel green and environment-friendly energy storage device, and has attracted the wide attention of scientific research personnel. For the super capacitor, the selection of the electrode material is crucial, so the current research focus is mainly on the aspect of the electrode material, and the development of the electrode material with high energy density, high power density and good cycle stability is crucial to the development of the super capacitor.
Supercapacitors can be divided into two categories according to the charge storage approach: electric double layer capacitors and pseudocapacitors. The double electric layer capacitor mainly depends on electrostatic attraction of positive and negative ions in electrolyte, so that the positive and negative ions respectively move towards two electrodes to form a double electric layer; when the voltage is removed, the electrons adsorbed at the two ends of the electrode material are restored to a random state, and the energy is released. The capacitor electrode material is mainly a carbon material and comprises: carbon nanotubes, carbon fibers, carbon aerogels, graphene, and the like. However, the electrode material of the double electric layer capacitor only depends on electrostatic attraction when storing charges and does not relate to chemical reaction, so that the specific discharge capacity is smaller; the pseudo capacitor is mainly characterized in that a rapid Faraday redox reaction occurs on the surface or near surface of an electrode material, so that charges are stored and released, and the pseudo capacitor has a higher specific discharge capacity.
Conductive polymers (such as polypyrrole, polythiophene, polyaniline, poly-o-phenylenediamine and the like) are widely concerned by researchers due to the advantages of high conductivity, large specific discharge capacity and the like, and become extremely important electrode materials applied to supercapacitors. Besides the excellent electrochemical properties, poly-o-phenylenediamine has other advantages, such as: the preparation is simple, the cost is low, the oxidation-reduction property and the environmental stability are good, so the preparation method can be applied to other fields besides the super capacitor, such as: microelectronic devices, transistors, chemical sensors, organic light emitting diodes, and the like. In addition, transition metal oxides and their derivative compounds have attracted much attention due to their excellent structural flexibility and good physicochemical properties, and have various applications, such as: molecular sieves, catalysts, lithium manganese batteries, alkaline zinc manganese batteries, electrochemical supercapacitors, and the like. The crystal structure, size, morphology and surface area of the grains can greatly affect the properties of the metal oxide. The transition metal oxide electrode material is generally prepared by an electrochemical deposition method, a sol-gel method, or the like. In view of the excellent electrochemical properties of metal oxides and conductive polymers, many researchers have carried out the preparation of metal oxide @ polymer nanocomposite materials for the field of supercapacitors, wherein the preparation of metal oxide @ polymer nanocomposite materials has become a research hotspot in this field due to the advantages of abundant resources of Fe and Mn elements, low cost, good structural flexibility, good conductivity, high specific capacitance, and the like.
Disclosure of Invention
The invention aims to overcome the defects of complex material synthesis process, expensive raw materials, small specific discharge capacity of the material, poor cycle performance and the like in the prior art. The invention provides Mn 3 O 4 -Fe 3 O 4 A method for preparing a @ POPD nano composite material.
The invention adopts the following technical scheme to solve the technical problems:
the invention firstly provides Mn 3 O 4 -Fe 3 O 4 @ POPD nanocomposite, mn 3 O 4 And Fe 3 O 4 Dispersed in poly-o-phenylenediamine (POPD).
The invention also provides Mn 3 O 4 -Fe 3 O 4 The preparation method of the @ POPD nano composite material comprises the following steps:
(1) Firstly, a certain amount of FeCl is weighed 3 ·6H 2 O and MnCl 2 Dissolving in deionized water, and mixing to obtain FeCl 3 And MnCl 2 The mixed aqueous solution of (1); secondly, adding a certain amount of o-phenylenediamine to FeCl 3 And MnCl 2 The mixed aqueous solution is subjected to ultrasonic treatment to uniformly mix the solution;
(2) Slowly adding ammonia water (NH) into the mixed solution obtained in the step (1) 3 ·H 2 O), stirring the mixture, and standing the mixture for reaction; after the standing reaction is finished, pouring out the upper layer solution to obtain a lower layer precipitate, centrifuging the precipitate, and washing with absolute ethyl alcohol and distilled water for several times respectively; drying the washed precipitate to obtain a sample Mn 3 O 4 -Fe 3 O 4 @ POPD nanocomposites.
In the step (1), the FeCl 3 ·6H 2 O、MnCl 2 And the mass ratio of o-phenylenediamine is 1 to 5.
The FeCl 3 ·6H 2 The dosage ratio of O, deionized water and ammonia water is 2-10 mmol:60mL of: 20mL.
In the step (2), the stirring time is 2-8 h; the time of the static reaction is 8 to 16 hours.
The invention uses FeCl 3 ·6H 2 O、MnCl 2 As a metal element source and o-phenylenediamine as a polymer monomer, feCl is prepared by a simple chemical deposition method 3 ·6H 2 O、MnCl 2 Compounding with o-phenylenediamine to obtain Mn 3 O 4 -Fe 3 O 4 The @ POPD composite material is applied to the field of capacitors, and is a pseudocapacitance electrode material with good application prospect.
The invention has the beneficial effects that:
(1) The metal elements used in the invention are manganese and iron, the sources are rich, and the price is low; the used monomer is o-phenylenediamine, which is a common monomer.
(2) The invention can obtain Mn by one-step reaction at normal temperature 3 O 4 -Fe 3 O 4 The @ POPD composite material saves the time and cost of industrial production.
(3) The composite material prepared by the invention has the characteristics of small particle size, large specific surface area and the like, can be fully contacted with electrons in electrolyte, and has the current density of 1 A.g -1 Time, sample Mn 3 O 4 -Fe 3 O 4 The specific capacity of the @ POPD composite material can reach 1455.9 F.g -1 The capacity retention rate can still reach 78.3 percent after 2500 cycles. Therefore, the lithium ion battery has the advantages of higher specific discharge capacity, good cycling stability and the like, and has good cycling stability.
(4) Mn obtained by the invention 3 O 4 -Fe 3 O 4 The preparation method of the @ POPD nano composite material is simple and feasible, short in process, easy to control in operation and suitable for popularization and application.
Drawings
FIG. 1 is Fe 3 O 4 -Mn 3 O 4 EDS profile of @ POPD sample;
FIG. 2 (A) is an XRD pattern of POPD-Mn; FIG. 2 (B) is Fe 3 O 4 -Mn 3 O 4 The XRD pattern of the @ POPD sample;
FIG. 3 is Fe 3 O 4 -Mn 3 O 4 Infrared analysis (FTIR) plot of @ POPD sample;
FIG. 4 shows the addition of different amounts of Fe 3+ TEM image of the sample (b): (A) POPD-Mn-Fe-2, (B) POPD-Mn-Fe-4, (C) POPD-Mn-Fe-6, (D) POPD-Mn-Fe-8, (E) POPD-Mn-Fe-10, (F) POPD-Mn;
FIG. 5 (A) shows Fe 3 O 4 -Mn 3 O 4 @ POPD Current Density of 1 A.g -1 A constant current charging and discharging curve; (B) Is Fe 3 O 4 -Mn 3 O 4 @ POPD at 1A. G -1 Constant current charge-discharge specific capacitance;
FIG. 6 (A) is a constant current charge-discharge curve of POPD-Mn-Fe-4 at different current densities; (B) The specific capacitance of POPD-Mn-Fe-4 under different current densities;
FIG. 7 shows the POPD-Mn-Fe-4 sample at 2A g -1 Capacitance loss ratio after 2500 cycles under conditions.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments:
example 1
2mmol of FeCl 3 ·6H 2 O and 4mmol MnCl 2 Dissolving in 60ml deionized water, and mixing to obtain FeCl 3 And MnCl 2 The mixed aqueous solution of (1); 4mmol of o-phenylenediamine was added to FeCl 3 And MnCl 2 The mixed aqueous solution is subjected to ultrasonic treatment for 30min to be uniformly mixed, so that FeCl containing o-phenylenediamine is obtained 3 And MnCl 2 Mixing the aqueous solution; slowly adding into the mixed solution20ml of aqueous ammonia (NH) 3 ·H 2 O), then placing the mixture on a six-linkage magnetic stirrer to be stirred vigorously for 6 hours, and standing for reaction for 12 hours; after the standing reaction is finished, pouring out the upper-layer solution to obtain a lower-layer precipitate; centrifuging the precipitate, and washing with anhydrous ethanol and distilled water for 3 times; drying the washed precipitate at 60 ℃ for 24h to obtain a sample Mn 3 O 4 -Fe 3 O 4 @ POPD, the sample obtained was labeled POPD-Mn-Fe-2.
Example 2
4mmol of FeCl 3 ·6H 2 O and 4mmol MnCl 2 Dissolving in 60ml deionized water, and mixing to obtain FeCl 3 And MnCl 2 The mixed aqueous solution of (1); 4mmol of o-phenylenediamine was added to FeCl 3 And MnCl 2 The mixed aqueous solution is subjected to ultrasonic treatment for 30min to be uniformly mixed, so that FeCl containing o-phenylenediamine is obtained 3 And MnCl 2 Mixing the aqueous solution; to the above mixed solution was slowly added 20ml of ammonia (NH) 3 ·H 2 O), then placing the mixture on a six-linkage magnetic stirrer to be stirred vigorously for 6 hours, and standing for reaction for 12 hours; after the standing reaction is finished, pouring out the upper-layer solution to obtain a lower-layer precipitate; centrifuging the precipitate, and washing with anhydrous ethanol and distilled water for 3 times; drying the washed precipitate at 60 ℃ for 24h to obtain a sample Mn 3 O 4 -Fe 3 O 4 @ POPD, the sample obtained was labeled POPD-Mn-Fe-4.
Example 3
6mmol of FeCl 3 ·6H 2 O and 4mmol MnCl 2 Dissolving in 60ml deionized water, and mixing to obtain FeCl 3 And MnCl 2 The mixed aqueous solution of (1); 4mmol of o-phenylenediamine was added to FeCl 3 And MnCl 2 The mixed aqueous solution is subjected to ultrasonic treatment for 30min to be uniformly mixed, so that FeCl containing o-phenylenediamine is obtained 3 And MnCl 2 Mixing the aqueous solution; slowly adding into the mixed solution20ml of ammonia (NH) was added 3 ·H 2 O), then placing the mixture on a six-linkage magnetic stirrer to be stirred vigorously for 6 hours, and standing for reaction for 12 hours; after the standing reaction is finished, pouring out the upper-layer solution to obtain a lower-layer precipitate; centrifuging the precipitate, and washing with anhydrous ethanol and distilled water for 3 times; drying the washed precipitate at 60 ℃ for 24h to obtain a sample Mn 3 O 4 -Fe 3 O 4 @ POPD, the sample obtained was labeled POPD-Mn-Fe-6.
Example 4
Adding 8mmol of FeCl 3 ·6H 2 O and 4mmol MnCl 2 Dissolving in 60ml of deionized water, and mixing to obtain FeCl 3 And MnCl 2 The mixed aqueous solution of (1); 4mmol of o-phenylenediamine was added to FeCl 3 And MnCl 2 The mixed aqueous solution is subjected to ultrasonic treatment for 30min to be uniformly mixed, so that FeCl containing o-phenylenediamine is obtained 3 And MnCl 2 Mixing the aqueous solution; to the above mixed solution was slowly added 20ml of ammonia (NH) 3 .H 2 O), then placing the mixture on a six-linkage magnetic stirrer for vigorous stirring for 6h, and then standing for reaction for 12h; after the standing reaction is finished, pouring out the upper-layer solution to obtain a lower-layer precipitate; centrifuging the precipitate, and washing with anhydrous ethanol and distilled water for 3 times; drying the washed precipitate at 60 ℃ for 24h to obtain a sample Mn 3 O 4 -Fe 3 O 4 @ POPD, the sample obtained was labeled POPD-Mn-Fe-8.
Example 5
Adding 10mmol of FeCl 3 ·6H 2 O and 4mmol MnCl 2 Dissolving in 60ml of deionized water, and mixing to obtain FeCl 3 And MnCl 2 The mixed aqueous solution of (1); 4mmol of o-phenylenediamine was added to FeCl 3 And MnCl 2 The mixed aqueous solution is subjected to ultrasonic treatment for 30min to be uniformly mixed, so that FeCl containing o-phenylenediamine is obtained 3 And MnCl 2 Mixing the aqueous solution; adding into the mixed solutionSlowly add 20ml ammonia (NH) 3 ·H 2 O), then placing the mixture on a six-linkage magnetic stirrer for vigorous stirring for 6h, and then standing for reaction for 12h; after the standing reaction is finished, pouring out the upper-layer solution to obtain a lower-layer precipitate; centrifuging the precipitate, and washing with anhydrous ethanol and distilled water for 3 times; drying the washed precipitate at 60 ℃ for 24h to obtain a sample Mn 3 O 4 -Fe 3 O 4 @ POPD, the sample obtained was labeled POPD-Mn-Fe-10.
It can be seen from FIG. 1 that the elemental composition in the sample is mainly Fe, mn, C and O.
FIG. 2 (A) is an XRD pattern of POPD-Mn, and it can be known from alignment standard card (JCPDS No. 07-0322) that characteristic diffraction peaks at 2 θ =17.9 °, 28.9 °, 32.2 °, 38 °, 44.5 °, 50.6 °, 58.5 °, 59.8 ° and 64.5 ° correspond to Mn, respectively 3 O 4 Crystal planes (101), (112), (103), (211), (220), (105), (321), (224) and (400) of (A), in which Mn is present 3 O 4 Is tetragonal system. When Fe is introduced into the system 3+ Thereafter, XRD of the prepared product is shown in fig. 2B, which has 8 characteristic peaks at 2 θ =18 °, 29.97 °, 35.5 °, 42.9 °, 53.1 °, 56.7 °, 62.3 ° and 74.2 °, corresponding to Mn 3 O 4 And Fe 3 O 4 Crystal planes (JCPDS No.24-0734 and JCPDS No. 89-4319) of (111), (220), (311), (400), (422), (511), (440), (533). In comparison with FIG. 2A, mn 3 O 4 The crystal system is changed from a tetragonal system to a hexagonal system. From FIGS. 2 (A) and 2 (B), it can be seen that Fe is added 3+ After, mn 3 O 4 Not only the diffraction peak position is shifted leftwards, the crystal face is changed, but also Mn 3 O 4 The crystal form of (A) is also changed, which indicates that Fe is added 3+ For Mn 3 O 4 Has a great influence.
In addition, as can be seen from FIG. 2 (B), the XRD patterns of POPD-Mn-Fe-2 and POPD-Mn-Fe-4 have no particularly strong sharp peaks, mainly because the content of the oxidant is relatively small, and the reaction is incomplete. No impurity peak appears in the XRD patterns of POPD-Mn-Fe-6, POPD-Mn-Fe-8 and POPD-Mn-Fe-10, and each sample has a relatively obvious diffraction peak, which indicates that the sample has a relatively obvious diffraction peakGood crystallinity, and furthermore, the intensity and position of diffraction peaks of all samples are comparable, indicating FeCl 3 .6H 2 The content of O has little influence on the crystallization of the composite material.
As can be seen in FIG. 3, each sample is at 1500cm -1 The left and the right have three absorption peaks with medium intensity, which are characteristic absorption peaks of benzene ring, wherein 1550cm -1 ～1450cm -1 And 1650cm -1 ～1600cm -1 The absorption peak in the range is the skeletal vibration absorption peak of the phenazine unit, and 1250cm -1 ～1200cm -1 The absorption peak in the range is the C-N-H vibration absorption peak. 3500cm -1 ～3300 cm -1 The absorption peaks appearing in the range are the N-H stretching vibration peaks in the product. And 560cm -1 The absorption peak at (A) is the Fe-O vibration absorption peak. The infrared spectrum of POPD-Mn appears at 618cm -1 And 510cm -1 The absorption peak is Mn-O stretching vibration peak. As can be seen from the figure, with Fe 3+ Increased, the ir spectrum of the product shifted, probably due to Fe 3 O 4 -Mn 3 O 4 The quantum size effect of @ POPD nanocomposites.
In FIG. 4, the gray portion is organic, i.e., POPD, and the black portion is inorganic, i.e., fe 3 O 4 And Mn 3 O 4 . FIG. 4 (F) shows Mn 3 O 4 In the transmission electron microscope image of @ POPD, it can be clearly seen that inorganic substances are distributed on the organic substance matrix, and Fe is added 3 + Then, the appearance of the sample is changed, and small inorganic particles are uniformly wrapped in the organic matters. As can be seen from FIGS. 4 (A) and (B), the inorganic substance Fe 3 O 4 And Mn 3 O 4 Has not yet formed due to the initial addition of an oxidizing agent (i.e., feCl) 3 .6H 2 O) is too little and the reaction is incomplete, but it can also be seen that inorganic matter is encapsulated in organic matter. The appearance of inorganic matters is more and more standardized with the increase of the content of the oxidizing agent, and when the content of the oxidizing agent reaches 6mmol, the content of the oxidizing agent reaches the content required by the reaction. The inorganic substance is spherical particles coated with a layer of organic substanceThe grains are smaller.
FIG. 5 (A) shows Mn 3 O 4 -Fe 3 O 4 @ POPD composite material at a current density of 1A g -1 Constant current charge-discharge (GCD) curve, and Mn in FIG. 5 (B) 3 O 4 -Fe 3 O 4 @ POPD composite material at a current density of 1A g -1 Specific capacitance of time. As can be seen from FIG. 5 (A), when the experimental reaction is complete, i.e., feCl 3 .6H 2 After the content of O reaches 6mmol, the O is added with FeCl 3 .6H 2 The specific capacitance of the sample is continuously increased when the content of O is increased, and when FeCl is added 3 .6H 2 When the content of O reaches 10mmol, the specific capacitance reaches 960.4 F.g -1 . This may be due to the accompanying FeCl 3 .6H 2 Increase in O content, mn 3 O 4 -Fe 3 O 4 The specific surface area of @ POPD nanocomposites has increased with it, resulting in an increasing specific capacitance of the material. It can also be seen from FIG. 5 that when FeCl is used 3 .6H 2 When the content of O is small, although the reaction of the sample is incomplete, feCl is used 3 .6H 2 When the O content reaches 4mmol, the specific capacitance of the POPD-Mn-Fe-4 sample reaches the maximum (1455.9F g) -1 ). Compared with other samples, POPD-Mn-Fe-4 has more excellent electrochemical performance. FIG. 6 (A) is a charge/discharge curve of POPD-Mn-Fe-4 at different current densities, and FIG. 6 (B) is a specific capacitance of POPD-Mn-Fe-4 at different current densities, wherein the current densities are 1.0, 2.0, 3.0A g -1 . As can be seen from the figure. The charging plateau occurred at around 0.35V (charging step) and the discharging plateau occurred at around 0.3V (discharging step), corresponding to the oxidation reaction and reduction reaction of POPD-Mn-Fe-4, respectively. FIG. 6 (B) is the specific capacitance of POPD-Mn-Fe-4 at different current densities, from which it is clear that when the current density is 1A g -1 The specific capacitance of the sample POPD-Mn-Fe-4 was 1455.9 Fg -1 When the current density is 3A · g -1 When the specific capacitance of POPD-Mn-Fe-4 is still 846.9F g -1 This indicates that the POPD-Mn-Fe-4 sample has very excellent specific capacitance.
As can be seen from FIG. 7, when POPD-Mn-Fe-10 sample is cycled 2500 times, the capacitance still has 78.3% of the initial capacitance, indicating that the sample has excellent cycling stability.

Claims (4)

1. Mn (manganese) 3 O 4 -Fe 3 O 4 The preparation method of the @ POPD bimetal oxide @ conductive polymer is characterized by comprising the following steps of:
(1) Firstly, a certain amount of FeCl is weighed 3 ·6H 2 O and MnCl 2 Dissolving in deionized water, and mixing to obtain FeCl 3 And MnCl 2 The mixed aqueous solution of (1); secondly, adding a certain amount of o-phenylenediamine to FeCl 3 And MnCl 2 The mixed aqueous solution is subjected to ultrasonic treatment to uniformly mix the solution; the FeCl 3 ·6H 2 O、MnCl 2 And the mass ratio of o-phenylenediamine is 1-5;
(2) Slowly adding ammonia water into the mixed solution obtained in the step (1), wherein the FeCl is 3 ·6H 2 The dosage ratio of O, deionized water and ammonia water is 2-10 mmol:60mL of: 20mL; stirring the mixture for 2 to 8 hours, and then standing the mixture for reaction for 8 to 16 hours; after the standing reaction is finished, centrifugally separating the precipitate, and washing the precipitate for a plurality of times by using absolute ethyl alcohol and distilled water respectively; drying the washed precipitate to obtain a sample Mn 3 O 4 -Fe 3 O 4 @ POPD nanocomposites.
2. Mn (manganese) 3 O 4 -Fe 3 O 4 @ POPD double metal oxide @ conductive polymer is characterized in that the polymer is prepared by the preparation method of claim 1, and the double metal oxide is Mn 3 O 4 -Fe 3 O 4 The conductive polymer is poly-o-phenylenediamine POPD.
3. An Mn as claimed in claim 2 3 O 4 -Fe 3 O 4 The @ POPD bimetal oxide @ conductive polymer is characterized in that the specific capacity can reach 1455.9 F.g < -1 >, and the capacity retention rate after 2500 cycles is 78.3%.
4. A Mn as described in claim 2 3 O 4 -Fe 3 O 4 The use of the @ POPD bimetal oxide @ conductive polymer as a pseudocapacitance electrode material.
CN201810225606.3A 2018-03-19 2018-03-19 Mn (manganese) 3 O 4 -Fe 3 O 4 Preparation method and application of @ POPD bimetal oxide @ conductive polymer Active CN108538620B (en)

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