CN105355954A - Biofuel cell capable of directly oxidizing glucose and preparation method of biofuel cell - Google Patents

Biofuel cell capable of directly oxidizing glucose and preparation method of biofuel cell Download PDF

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Publication number
CN105355954A
CN105355954A CN201510926190.4A CN201510926190A CN105355954A CN 105355954 A CN105355954 A CN 105355954A CN 201510926190 A CN201510926190 A CN 201510926190A CN 105355954 A CN105355954 A CN 105355954A
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fuel cell
anode
biological fuel
glucose
preparation
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CN105355954B (en
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吴桐
惠志锋
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CHENGDU HUICHENG TECHNOLOGY Co Ltd
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CHENGDU HUICHENG TECHNOLOGY Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/16—Biochemical fuel cells, i.e. cells in which microorganisms function as catalysts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/90—Selection of catalytic material
    • H01M4/9041—Metals or alloys
    • 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
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Abstract

The invention discloses a biofuel cell capable of directly oxidizing glucose and a preparation method of the biofuel cell. The biofuel cell comprises an anode chamber, a cathode chamber, a membrane for separating the anode chamber and the cathode chamber, and an outer circuit for connecting an anode in the anode chamber and a cathode in the cathode chamber; fuel in the anode chamber is the glucose; fuel in the cathode chamber is oxygen; the anode and the cathode are nickel net or copper net electrodes loaded with nano silver particles. The preparation method comprises the following steps of preparing an electrode, preparing electrolyte, assembling the biofuel cell and the like. The biofuel cell capable of directly oxidizing the glucose, provided by the invention, takes the nickel net or copper net electrodes loaded with the nano silver particles as the anode and the cathode, so that the power density of the cell is effectively improved, and the stability of the biofuel cell under different temprature conditions and different loading conditions is also guaranteed; the preparation method of the biofuel cell is relatively simple and easy, low in cost and is convenient to popularize and apply.

Description

A kind of direct oxidation glucose biological fuel cell and preparation method thereof
Technical field
The present invention relates to the technical field of biological fuel cell, more particularly, relate to a kind of direct oxidation glucose biological fuel cell and preparation method thereof.
Background technology
Day by day serious along with the lasting in short supply of the future world energy and environmental crisis, develop the novel renewable energy that pollution do not form to environment come petroleum replacing, coal etc. now main fuel seem more and more important.From environment, obtain energy drives electronic equipment, be all the dream of the whole mankind all the time, and glucose biological fuel cell, can under the catalysis of microbe or enzyme as the one in novel renewable energy, and be converted into electric energy, energy conversion efficiency is high; Effectively can run under remote, low temperature environment, environmental suitability is strong; Electricity generation process environmental protection, only produces CO at the most 2, and CO 2burst size lower than the average level of other energy forms.Due to the peculiar advantage of glucose biological fuel cell, make it in alternative energy source, waste water treatment etc., have huge applications prospect, then become current one large study hotspot.
But while increasing scholar participates in this research field, the development of glucose biological fuel cell own is also faced with bottleneck, and its bottleneck is mainly manifested in two aspects: most of glucose biological fuel cell output power is still lower and unstable; Major part system needs to add electron transmission intermediate could improve electricity generation ability, but electron transmission intermediate is expensive and poisonous, is not suitable with growth requirement.In addition, adopt microbe or enzyme as catalyst, although wide material sources, with low cost, their limited activity, running time is shorter, and such as the life span of enzyme in acetate buffer solution is only 8 hours to 2 days.Chinese patent application CN102569861A discloses a kind of enzyme thermistor devices, adopt phenols proton exchange membrane, and using Graphene-nano-Au composite load laccase and glucose oxidase as the catalyst at negative and positive the two poles of the earth, although improve the cycle of operation of battery to a certain extent, its power output is still lower.Enzyme thermistor devices represents a kind of emerging energy mode, but its still exist many problems need solve, as low open circuit voltage, low power output and the operation stability of short time.
Recently, adopt the glucose biological fuel cell of basic media and metallic catalyst because of its preferably performance and attracting attention gradually, therefore develop basic media and metallic catalyst and replace enzyme or microbe as the catalyst of glucose biological fuel cell and the better glucose biological fuel cell of performance has great importance.
Summary of the invention
In order to solve problems of the prior art, the object of this invention is to provide and a kind ofly utilize basic media and metallic catalyst to replace enzyme or microbe as the catalyst of glucose biological fuel cell and stable performance and the larger glucose biological fuel cell of power output.
An aspect of of the present present invention provides a kind of direct oxidation glucose biological fuel cell, described biological fuel cell comprise anode chamber, cathode chamber, separation anode chamber and cathode chamber barrier film and be connected the external circuit of the anode in described anode chamber and the negative electrode in cathode chamber, fuel in described anode chamber is glucose, fuel in described cathode chamber is oxygen, and described anode and negative electrode are nickel screen or the copper net electrode that load has nano silver particles.
According to an embodiment of direct oxidation glucose biological fuel cell of the present invention, described barrier film is PEEK base anion-exchange membrane.
According to an embodiment of direct oxidation glucose biological fuel cell of the present invention, anolyte in described anode chamber adopts nitrogen saturated and concentration is KOH or the NaOH buffer solution of 0.5 ~ 5mol/L, wherein containing glucose and concentration of glucose is 0.1 ~ 5mol/L.
According to an embodiment of direct oxidation glucose biological fuel cell of the present invention, catholyte in described cathode chamber adopts concentration to be KOH or the NaOH buffer solution of 0.5 ~ 5mol/L, wherein containing saturated oxygen and oxygen pass into flow 50 ~ 1000sscm.
According to an embodiment of direct oxidation glucose biological fuel cell of the present invention, the porosity of described nickel screen or copper mesh is 60 ~ 90% and aperture size is 150 ~ 250 μm.
Another aspect provides a kind of preparation method of direct oxidation glucose biological fuel cell, described preparation method comprises the following steps:
A, prepare electrode: adopt acid solution that the nickel screen after cleaning or copper mesh are carried out etching processing and rinse, again nickel screen or copper mesh are inserted in liquor argenti nitratis ophthalmicus and carry out immersion treatment, the nickel screen of obtained loaded with nano silver particles or copper net electrode, for subsequent use by being stored in KOH or NaOH solution after the nickel screen of described loaded with nano silver particles or copper net electrode cleaning;
B, preparation electrolyte: the anolyte of preparation containing glucose and the catholyte containing oxygen;
C, assembling biological fuel cell: the nickel screen of described loaded with nano silver particles or copper net electrode are respectively charged in anode chamber and cathode chamber as anode and negative electrode; The barrier film separating anode chamber and cathode chamber is installed; External circuit is utilized to connect described anode and negative electrode; Add anolyte in anode room and add catholyte in cathode chamber, assembling obtains biological fuel cell.
According to an embodiment of the preparation method of direct oxidation glucose biological fuel cell of the present invention, described acid solution is hydrochloric acid solution and the concentration of hydrochloric acid solution is 5 ~ 10mol/L, and the time of etching processing is 15 ~ 30min; The concentration of described KOH or NaOH solution is 1 ~ 5mol/L.
According to an embodiment of the preparation method of direct oxidation glucose biological fuel cell of the present invention, the porosity of described nickel screen or copper mesh is more than 80% and aperture size is 150 ~ 250 μm; The concentration of described liquor argenti nitratis ophthalmicus is 1 ~ 5mmol/L, and the time of immersion treatment is 30 ~ 60min.
According to an embodiment of the preparation method of direct oxidation glucose biological fuel cell of the present invention, described anolyte adopts nitrogen saturated and concentration is KOH or the NaOH buffer solution of 0.5 ~ 5mol/L, wherein containing glucose and concentration of glucose is 0.1 ~ 5mol/L; Catholyte in described cathode chamber adopts concentration to be KOH or the NaOH buffer solution of 0.5 ~ 5mol/L, wherein containing saturated oxygen and the flow that passes into of oxygen is 50 ~ 1000sscm.
According to an embodiment of the preparation method of direct oxidation glucose biological fuel cell of the present invention, described barrier film is PEEK base anion-exchange membrane, and use to utilize before described PEEK base anion-exchange membrane mass concentration be 3 ~ 5% KCL solution immersion treatment is carried out to it.
Compared with prior art, the nickel screen of direct oxidation glucose biological fuel cell employing loaded with nano silver particles of the present invention or copper net electrode are as anode and negative electrode, thus effectively improve the power density of battery, the peak power output obtained apparently higher than the glucose biological fuel cell using enzyme or microbe as catalyst, and ensure that the stability of biological fuel cell under condition of different temperatures, different loads condition; Further, the preparation method of described biological fuel cell is comparatively simple and easy, and cost is not high, is easy to be extended and applied.
Accompanying drawing explanation
Fig. 1 shows the structural representation of direct oxidation glucose biological fuel cell according to an exemplary embodiment of the present invention.
Fig. 2 A and Fig. 2 B shows the stereoscan photograph of porous metals nickel screen in example 1; Fig. 2 C shows the stereoscan photograph of the nickel screen electrode of loaded with nano silver particles in example 1.
Fig. 3 shows the XRD collection of illustrative plates of the nickel screen electrode of porous metals nickel screen and loaded with nano silver particles in example 1.
Voltage-current curve when Fig. 4 direct oxidation glucose biological fuel cell concentration of glucose in anolyte shown in example 2, example 3 and example 4 is respectively 0.1mol/L, 0.5mol/L and 0.9mol/L and power density-current curve.
Open circuit voltage when Fig. 5 direct oxidation glucose biological fuel cell concentration of glucose in anolyte shown in example 2, example 3 and example 4 is respectively 0.1mol/L, 0.5mol/L and 0.9mol/L and internal resistance of cell curve.
Fig. 6 direct oxidation glucose biological fuel cell oxygen flow in catholyte shown in example 2, example 5 and example 6 is respectively voltage-current curve when 100sscm, 200sscm and 400sscm.
Fig. 7 shows the voltage-current curve of direct oxidation glucose biological fuel cell respectively when 23 DEG C, 40 DEG C and 60 DEG C in example 2, example 7 and example 8.
Description of reference numerals:
1-anode chamber, 2-cathode chamber, 3-anode, 4-negative electrode, 5-barrier film, 6-external circuit, 7-load, 8-anode chamber feed pipe, 9-anode chamber discharge nozzle, 10-cathode chamber feed pipe, 11-cathode chamber discharge nozzle.
Embodiment
All features disclosed in this specification, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Arbitrary feature disclosed in this specification (comprising any accessory claim, summary and accompanying drawing), unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
First the structure of direct oxidation glucose biological fuel cell of the present invention and principle are described in detail below.
Fig. 1 shows the structural representation of direct oxidation glucose biological fuel cell according to an exemplary embodiment of the present invention.As shown in Figure 1, according to exemplary embodiment of the present invention, described direct oxidation glucose biological fuel cell comprises the external circuit 6 of the anode 3 in anode chamber 1, cathode chamber 2, the barrier film 5 separating anode chamber 1 and cathode chamber 2 and jointed anode room 1 and the negative electrode 4 in cathode chamber 2.Wherein, the fuel in anode chamber 1 is glucose, and the fuel in cathode chamber 2 is oxygen.According to the present invention, anode 3 and negative electrode 4 are nickel screen or the copper net electrode that load has nano silver particles.
Particularly, the present invention adopts load to have the nickel screen of nano silver particles or copper net electrode as anode-catalyzed electrode and cathode catalysis electrode, the oxygen that glucose respectively in catalyticing anode room loses in electronics and cathode chamber obtains electronics, electronics is got back to negative electrode 4 from anode 3 through external circuit 6 and is formed loop, realizes the chemical energy of fuel to electric transformation of energy.Wherein, when connecting into loop, load 7 can also be connected to test its power stage in external circuit 6.The present invention adopts the nickel screen or copper mesh with high-ratio surface sum volume ratio to carry out the load of high catalytic activity material silver, better catalytic effect can not only be realized and obtain larger power output, but also be conducive to the cost reducing fuel cell, expand range of application.According to a preferred embodiment of the invention, nickel screen or copper mesh are porous nickel screen or copper mesh, and the porosity of nickel screen or copper mesh is more than 60 ~ 90% and aperture size is 150 ~ 250 μm.
Wherein, barrier film used in the present invention is preferably PEEK base anion-exchange membrane (Fumasep tMfAB), the advantage of PEEK base anion-exchange membrane is that mechanical strength is high, chemical stability good and cost is low, and this anion-exchange membrane directly can buy acquisition, and the present invention does not too much limit its specific performance.
Preferably, anode chamber 1 is also provided with anode chamber's feed pipe 8 and anode chamber's discharge nozzle 9 to carry out the discharge adding and react afterproduct of anode chamber 1 Anodic electrolyte and fuel, cathode chamber 2 is similarly also provided with cathode chamber feed pipe 10 and cathode chamber discharge nozzle 11 to carry out the discharge adding and react afterproduct of catholyte and fuel in cathode chamber 2.
According to exemplary embodiment of the present invention, the anolyte used in anode chamber 1 adopts the saturated and concentration of nitrogen to be KOH or the NaOH buffer solution of 0.5 ~ 5mol/L, wherein containing glucose and concentration of glucose is 0.1 ~ 5mol/L.Catholyte in cathode chamber 2 adopts concentration to be KOH or the NaOH buffer solution of 0.5 ~ 5mol/L, wherein containing saturated oxygen and the flow that passes into of oxygen is 50 ~ 1000sscm.Wherein, the saturated nitrogen that anolyte passes into is the air in order to get rid of in anode chamber, stops the CO in air 2react with KOH or NaOH.
Below the preparation method of direct oxidation glucose biological fuel cell of the present invention is specifically described.
According to exemplary embodiment of the present invention, the preparation method of described direct oxidation glucose biological fuel cell comprises following steps.
Steps A: prepare electrode
First, adopt acid solution that the nickel screen after cleaning or copper mesh are carried out etching processing and rinse, again nickel screen or copper mesh are inserted in liquor argenti nitratis ophthalmicus and carry out immersion treatment, the nickel screen of obtained loaded with nano silver particles or copper net electrode, for subsequent use by being stored in KOH or NaOH solution after the nickel screen of described loaded with nano silver particles or copper net electrode cleaning.
Acetone is preferably first utilized to carry out Ultrasonic Cleaning to nickel screen or copper mesh, to remove the dirt on nickel screen or copper mesh as much as possible; Recycling acid solution is carried out etching processing to nickel screen or copper mesh and is amassed to form larger attaching surface on nickel screen or copper mesh, is beneficial to the load of nano silver particles.Wherein, described acid solution can be hydrochloric acid solution and the concentration of hydrochloric acid solution is 5 ~ 10mol/L, and the time of etching processing is preferably 15 ~ 30min.
The porosity of nickel screen or copper mesh is preferably more than 60 ~ 90% and aperture size is 150 ~ 250 μm.The concentration of liquor argenti nitratis ophthalmicus is preferably 1 ~ 5mmol/L, and the time of immersion treatment is preferably 30 ~ 60min.The selection of above parameter area is more conducive to the load effectively realizing high catalytic activity material silver on the nickel screen or copper mesh of high-ratio surface sum volume ratio, realize better catalytic effect and obtain larger power output, reduce the cost of fuel cell and expand range of application.
Before assembling biological fuel cell, preferably the nickel screen of the loaded with nano silver particles prepared or copper net electrode are stored for subsequent use, avoid loss of activity and inefficacy.Wherein, the concentration of KOH or NaOH solution is preferably 1 ~ 5mol/L.
Step B: preparation electrolyte
The anolyte of preparation containing glucose and the catholyte containing oxygen.
Fuel specifically carries out the acquisition of electronics in the electrolytic solution and loses, and electro transfer forms electric current to electrode surface is also mobile, and therefore electrolyte needs to ensure that fuel obtains and loses the suitable condition of electronics.
According to exemplary embodiment of the present invention, anolyte adopts the saturated and concentration of nitrogen to be KOH or the NaOH buffer solution of 0.5 ~ 5mol/L, wherein containing glucose and concentration of glucose is 0.1 ~ 5mol/L.Catholyte in cathode chamber adopts concentration to be KOH or the NaOH buffer solution of 0.5 ~ 5mol/L, wherein containing saturated oxygen and the flow that passes into of oxygen is 100 ~ 1000sscm.
Step C: assembling biological fuel cell
Preparation in steps A and the nickel screen of loaded with nano silver particles stored or copper net electrode are respectively charged in anode chamber 1 and cathode chamber 2 as anode 3 and negative electrode 4;
The barrier film 5 separating anode chamber 1 and cathode chamber 2 is installed;
Utilize external circuit jointed anode 3 and negative electrode 4;
Add anolyte in anode room 1 and add catholyte in cathode chamber 2, assembling obtains biological fuel cell.
Wherein, the major function of barrier film separates oxidant and reducing agent and conducting ion.The barrier film selected in the present invention is PEEK base anion-exchange membrane (Fumasep tMfAB), and utilized before using PEEK base anion-exchange membrane mass concentration be 3 ~ 5% KCL solution immersion treatment is carried out to remove the impurity that may exist in exchange membrane to it.
After assembling biological fuel cell, by adding the reactants such as fuel constantly and discharging product constantly, can realize generating electricity continuously and supply of electric power.Preferably, before formally generating electricity, preferably allow battery operation a period of time to obtain stable open circuit voltage.
Below in conjunction with example, direct oxidation glucose biological fuel cell of the present invention and preparation method thereof is described further.
Example 1: the preparation of anode and negative electrode
Select porous metals nickel screen disk (diameter is 5cm) and this porous metals nickel screen disk acetone is cleaned 5 minutes, then the hydrochloric acid etching processing 15 minutes of 6mol/L is adopted, carry out ultrasonic cleaning with ultra-pure water again, finally dry up by stream of nitrogen gas for subsequent use.
Porous metals nickel screen after above-mentioned process is put into the liquor argenti nitratis ophthalmicus immersion treatment 30min of 2mmol/L, the nickel screen electrode of obtained loaded with nano silver particles.Before assembling biological fuel cell, clean the nickel screen electrode of this loaded with nano silver particles with ultra-pure water, be then stored in the potassium hydroxide solution of 2mol/L stand-by.
Wherein, as shown in Figure 2 A and 2 B, the stereoscan photograph of the nickel screen electrode of loaded with nano silver particles as shown in Figure 2 C for the stereoscan photograph of porous metals nickel screen; The XRD of the nickel screen electrode of porous metals nickel screen and loaded with nano silver particles as shown in Figure 3.The homogeneous Nano silver grain of size can be observed by Fig. 2 A, Fig. 2 B and Fig. 2 C and be evenly dispersed in nickel porous net surface, form the nickel screen electrode of the loaded with nano silver particles of better quality; As seen from Figure 3, there is the crystal diffraction peak of more significantly silver particles, show that silver particles has been coated in nickel screen surface in the XRD figure of contrast nickel screen in the XRD figure of the nickel screen of loaded with nano silver particles.
Example 2:
Adopt PEEK anion-exchange membrane (Fumasep tMfAB, thickness is 100um) as the barrier film separated between anode chamber and cathode chamber.Anolyte adopts the saturated and concentration of nitrogen to be the KOH buffer solution of 0.5mol/L, and wherein the concentration of glucose is 0.5mol/L; Catholyte is then the KOH buffer solution of 0.5mol/L, wherein containing saturated oxygen and the flow of oxygen is 100sscm.
The nickel screen electrode of the loaded with nano silver particles prepared in example 1 is respectively charged in anode chamber and cathode chamber as anode and negative electrode and also uses external circuit jointed anode and negative electrode, after adding above-mentioned anolyte and catholyte, obtain direct oxidation glucose biological fuel cell.
When testing the output power curve of direct oxidation glucose biological fuel cell in this example, record open-circuit voltage values after first allowing battery operation a period of time obtain stable open circuit voltage, then connect anode and the negative electrode of battery with different non-essential resistance load Ri (10 Ω-100k Ω), and adopt digital multimeter to measure battery power stage under different loads.Wherein, experimental temperature is 23 DEG C.
In this example, the voltage-current curve of direct oxidation glucose biological fuel cell and power density-current curve are shown in Fig. 4, and open circuit voltage and internal resistance of cell curve are shown in Fig. 5.In this example, the concentration of glucose is 0.5mol/L, and the performance of battery reaches best, and power output reaches 23mW/cm 2, it is 0.824V that open circuit voltage reaches maximum, and the internal resistance of cell is 425mOhm.
Example 3:
Utilize the nickel screen electrode of the loaded with nano silver particles prepared in example 1 as anode and negative electrode and assemble biological fuel cell according to example 2, wherein, the concentration of the glucose in anolyte is 0.1mol/L.
In this example, the voltage-current curve of direct oxidation glucose biological fuel cell and power density-current curve are shown in Fig. 4, and open circuit voltage and internal resistance of cell curve are shown in Fig. 5.In this example, the concentration of glucose is 0.1mol/L, and obtaining polarization curve, power density curve and open circuit voltage will lower than the result of example 2.
Example 4:
Utilize the nickel screen electrode of the loaded with nano silver particles prepared in example 1 as anode and negative electrode and assemble biological fuel cell according to example 2, wherein, the concentration of the glucose in anolyte is 0.9mol/L.
In this example, the voltage-current curve of direct oxidation glucose biological fuel cell and power density-current curve are shown in Fig. 4, and open circuit voltage and internal resistance of cell curve are shown in Fig. 5.In this example, the concentration of glucose is 0.9mol/L, and obtaining polarization curve, power density curve and open circuit voltage will lower than the result of example 2.
Example 5:
Utilize the nickel screen electrode of the loaded with nano silver particles prepared in example 1 as anode and negative electrode and assemble biological fuel cell according to example 2, wherein, the oxygen flow in catholyte is 200sscm.
In this example, the voltage-current curve of direct oxidation glucose biological fuel cell is shown in Fig. 6.In this example, oxygen flow is 200sscm, obtains polarization curve, power density curve is similar to the result of example 2 with open circuit voltage.
Example 6:
Utilize the nickel screen electrode of the loaded with nano silver particles prepared in example 1 as anode and negative electrode and assemble biological fuel cell according to example 2, wherein, the oxygen flow in catholyte is 400sscm.
In this example, the voltage-current curve of direct oxidation glucose biological fuel cell is shown in Fig. 6.In this example, oxygen flow is 400sscm, obtains polarization curve, power density curve is similar to the result of example 2 with open circuit voltage.
Example 7:
Utilize the nickel screen electrode of the loaded with nano silver particles prepared in example 1 as anode and negative electrode and assemble biological fuel cell according to example 2, wherein, experimental temperature is set as 40 DEG C.
In this example, the voltage-current curve of direct oxidation glucose biological fuel cell is shown in Fig. 7.In this example, experimental temperature is set as 40 DEG C, obtains the result that polarization curve is higher than example 2.
Example 8:
Utilize the nickel screen electrode of the loaded with nano silver particles prepared in example 1 as anode and negative electrode and assemble biological fuel cell according to example 2, wherein, experimental temperature is set as 60 DEG C.
In this example, the voltage-current curve of direct oxidation glucose biological fuel cell is shown in Fig. 7.In this example, experimental temperature is set as 60 DEG C, obtains the result that polarization curve is higher than example 7.
From above-mentioned example, the concentration of glucose of direct oxidation glucose biological fuel cell of the present invention in anolyte is 0.5mol/L, when oxygen flow in catholyte is 100sscm, the open circuit voltage of battery is 0.824V and the power density of battery reaches maximum, is 23mw.cm -2.Direct oxidation glucose biological fuel cell of the present invention has excellent stability.
In sum, the nickel screen of direct oxidation glucose biological fuel cell employing loaded with nano silver particles of the present invention or copper net electrode are as anode and negative electrode, thus effectively improve the power density of battery, the peak power output obtained apparently higher than the glucose biological fuel cell using enzyme or microbe as catalyst, and ensure that the stability of biological fuel cell under condition of different temperatures, different loads condition; Further, the preparation method of described biological fuel cell is comparatively simple and easy, and cost is not high, is easy to be extended and applied.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.

Claims (10)

1. a direct oxidation glucose biological fuel cell, it is characterized in that, described biological fuel cell comprise anode chamber, cathode chamber, separation anode chamber and cathode chamber barrier film and be connected the external circuit of the anode in described anode chamber and the negative electrode in cathode chamber, fuel in described anode chamber is glucose, fuel in described cathode chamber is oxygen, and described anode and negative electrode are nickel screen or the copper net electrode that load has nano silver particles.
2. direct oxidation glucose biological fuel cell according to claim 1, is characterized in that, described barrier film is PEEK base anion-exchange membrane.
3. direct oxidation glucose biological fuel cell according to claim 1, it is characterized in that, anolyte in described anode chamber adopts nitrogen saturated and concentration is KOH or the NaOH buffer solution of 0.5 ~ 5mol/L, wherein containing glucose and concentration of glucose is 0.1 ~ 5mol/L.
4. direct oxidation glucose biological fuel cell according to claim 1, it is characterized in that, catholyte in described cathode chamber adopts concentration to be KOH or the NaOH buffer solution of 0.5 ~ 5mol/L, wherein containing saturated oxygen and the flow that passes into of oxygen is 50 ~ 1000sscm.
5. direct oxidation glucose biological fuel cell according to claim 1, is characterized in that, the porosity of described nickel screen or copper mesh is 60 ~ 90% and aperture size is 150 ~ 250 μm.
6. a preparation method for direct oxidation glucose biological fuel cell, is characterized in that, described preparation method comprises the following steps:
A, prepare electrode: adopt acid solution that the nickel screen after cleaning or copper mesh are carried out etching processing and rinse, again nickel screen or copper mesh are inserted in liquor argenti nitratis ophthalmicus and carry out immersion treatment, the nickel screen of obtained loaded with nano silver particles or copper net electrode, for subsequent use by being stored in KOH or NaOH solution after the nickel screen of described loaded with nano silver particles or copper net electrode cleaning;
B, preparation electrolyte: the anolyte of preparation containing glucose and the catholyte containing oxygen;
C, assembling biological fuel cell: the nickel screen of described loaded with nano silver particles or copper net electrode are respectively charged in anode chamber and cathode chamber as anode and negative electrode; The barrier film separating anode chamber and cathode chamber is installed; External circuit is utilized to connect described anode and negative electrode; Add anolyte in anode room and add catholyte in cathode chamber, assembling obtains biological fuel cell.
7. the preparation method of direct oxidation glucose biological fuel cell according to claim 6, is characterized in that, described acid solution is hydrochloric acid solution and the concentration of hydrochloric acid solution is 5 ~ 10mol/L, and the time of etching processing is 15 ~ 30min; The concentration of described KOH or NaOH solution is 1 ~ 5mol/L.
8. the preparation method of direct oxidation glucose biological fuel cell according to claim 6, is characterized in that, the porosity of described nickel screen or copper mesh is more than 80% and aperture size is 150 ~ 250 μm; The concentration of described liquor argenti nitratis ophthalmicus is 1 ~ 5mmol/L, and the time of immersion treatment is 30 ~ 60min.
9. the preparation method of direct oxidation glucose biological fuel cell according to claim 6, it is characterized in that, described anolyte adopts nitrogen saturated and concentration is KOH or the NaOH buffer solution of 0.5 ~ 5mol/L, wherein containing glucose and concentration of glucose is 0.1 ~ 5mol/L; Catholyte in described cathode chamber adopts concentration to be KOH or the NaOH buffer solution of 0.5 ~ 5mol/L, wherein containing saturated oxygen and the flow that passes into of oxygen is 50 ~ 1000sscm.
10. the preparation method of direct oxidation glucose biological fuel cell according to claim 6, it is characterized in that, described barrier film is PEEK base anion-exchange membrane, and use to utilize before described PEEK base anion-exchange membrane mass concentration be 3 ~ 5% KCL solution immersion treatment is carried out to it.
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CN110534753A (en) * 2019-08-22 2019-12-03 浙江大学 The glucose fuel cell for having homogeneous auxiliary catalysis
CN113036164A (en) * 2019-12-24 2021-06-25 大连大学 Preparation method and application of composite electrode based on mesoporous carbon foam
CN113130913A (en) * 2019-12-31 2021-07-16 大连大学 PtNPs/NiNPs/AgNWs/PET plastic electrode and application thereof in construction of fructose fuel cell
CN113846335A (en) * 2021-08-31 2021-12-28 华南师范大学 Method for enhancing synergistic oxidation of sodium sulfite and glucose by utilizing platinum modified titanium dioxide electrode or nickel oxide electrode

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