CN105206846B - A kind of nickel lanthanide composite material negative electrode and Direct Carbon Fuel Cells thereof and preparation method - Google Patents
A kind of nickel lanthanide composite material negative electrode and Direct Carbon Fuel Cells thereof and preparation method Download PDFInfo
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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
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/8647—Inert electrodes with catalytic activity, e.g. for fuel cells consisting of more than one material, e.g. consisting of composites
- H01M4/8652—Inert electrodes with catalytic activity, e.g. for fuel cells consisting of more than one material, e.g. consisting of composites as mixture
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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
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
- H01M4/8875—Methods for shaping the electrode into free-standing bodies, like sheets, films or grids, e.g. moulding, hot-pressing, casting without support, extrusion without support
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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
- H01M8/14—Fuel cells with fused electrolytes
- H01M8/143—Fuel cells with fused electrolytes with liquid, solid or electrolyte-charged reactants
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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
- H01M8/22—Fuel cells in which the fuel is based on materials comprising carbon or oxygen or hydrogen and other elements; Fuel cells in which the fuel is based on materials comprising only elements other than carbon, oxygen or hydrogen
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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
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a kind of nickel lanthanide composite material negative electrode and Direct Carbon Fuel Cells thereof and preparation method.The nickel lanthanide composite material negative electrode of the present invention includes bi-material, and the first material is nickel, and the second material is lanthanide series metal or lanthana La2O3；The nickel lanthanide composite material negative electrode of the present invention is easy to make big, the complex-shaped amorphous state of area and nano crystal thin film material, is suitable for working continuously and large-scale production；And the composition of alloy film is easily controlled, production technology is simple, and cost is relatively low；The Direct Carbon Fuel Cells DCFC using the nickel lanthanide composite material negative electrode of the present invention transfers electric performance stablity in middle temperature, outputs higher power density and electric current density, has higher fuel conversion efficiency；The nickel lanthanide composite material that the present invention uses does not dissolves, and will not pollute molten caustic soda electrolyte and fused carbonate electrolyte.
Description
Technical field
The present invention relates to Direct Carbon Fuel Cells preparation field, be specifically related to a kind of nickel lanthanide composite material negative electrode and direct carbon fuel thereof
Battery and preparation method.
Background technology
Direct Carbon Fuel Cells (Direct Carbon Fuel Cell, DCFC) is a kind of electricity of the fuel with carbon and derivant thereof as fuel
Pond, has the outstanding advantages such as energy conversion efficiency height, environmental friendliness, fuel tolerance be wide.The total electrode reaction of DCFC is
C+O2=CO2, under standard state, this reaction Entropy Changes (DS) is close to 0, and gibbs free energy changeization is almost equal with enthalpy change.Therefore DCFC
Theoretical efficiency is up to 100%, and the fuel cell theoretical efficiency with hydrogen methane as fuel is respectively 83% and 91%.In addition
DCFC theoretical efficiency does not raises with temperature and reduces, and at 800 DEG C, DCFC theoretical efficiency is still 100%, and with hydrogen at 800 DEG C
Gas is that the fuel cell theoretical efficiency of fuel is reduced to 74%, and therefore DCFC is paid close attention to by people the most again.
At present both at home and abroad the research contents of the Patents of DCFC substantially around the internal structure of DCFC, electrode material,
The aspects such as reaction unit, electrolyte compositional optimization and fluid control systems.
Within 2006, Univ St Andrews proposes a kind of Direct Carbon Fuel Cells in patent 201280064087.8
DCFC system, includes electro-chemical systems, anode chamber, cathode chamber, anode casing, cathode shell and adapter, have employed
First electrolyte of solid-state and fused carbonate are as the second electrolyte, and negative electrode uses manganous acid strontium lanthanum, mixes the strontium cobalt/cobalt oxide of lanthanum
Etc. solid metal oxide, under the running temperature of 750 DEG C, optimization electric current density is 120mA/cm2, power density is
40mW/cm2。
Patent 201210197623.3 proposed a kind of direct carbon fuel cell device with liquid metal stannum as anode in 2012,
This invention is with liquid metal stannum as anode, rather than the anode construction that existing carbon-containing fuel mixture is constituted with current collector, carry
High anode mass-transfer performance, meanwhile, can carry out the research and development of high-power direct carbon fuel cell stack according to new structure.
Tsing-Hua University proposes a kind of Direct Carbon Fuel Cells reaction unit, this reaction unit bag in patent 200810119204.1
Include fixed component, water-cooling section, cathode gas supply part, anodic gas supply part, the arrangement of carbon fuel parts, afflux portion
Part, seal member, survey temperature-control units and reaction cavity parts.This device can realize the sealing to Direct Carbon Fuel Cells, electric current
Afflux, the supply of anode and cathode gas, measuring and controlling temp, solid carbon fuel supply, anode add water and the function such as zone heating, are simultaneously
Outside gas circuit, battery performance test, reacting gas detection leave interface, to meet Direct Carbon Fuel Cells reaction condition
Demand.
Lawrence National Laboratory of the U.S. (Lawrence Livermore National Laboratory) with Cooper leader
Develop the fuel cell of fused carbonate.This battery uses the fused carbonate of high temperature (800 DEG C) as electrolyte, solid carbon
As fuel, the oxygen in air is as cathodic reduction agent, and under the running temperature of 800 DEG C, optimization electric current density is 120mA/cm2,
Power density is 60mW/cm2。
Korea Research Institute of Production Technology proposed one in 2015 in patent 201380037717.7 and may insure that fuel electrode
The mobility of medium and improve the fuel supply device of the Direct Carbon Fuel Cells of output density, this device includes access tube and rises
Bulb apparatus, the medium being by fuel electrode media flow is supplied on the fuel electrode of cast core, improves the defeated of cast core
Go out density.
DCFC industry relates to how that the invention improving Direct Carbon Fuel Cells power density is less the most both at home and abroad.Document
In [S.Zecevic, E.M.Patton, P.Parhami, Carbon 2004,42,1983-1993.] (low to using different cathode material
Carbon steel, nickel, nickel foam, Fe2Ti etc.) output performance of DCFC to be tested, the maximum electric current density of gained is 270mA/cm2,
Maximum power density is 60mW/cm2, fuel conversion efficiency is 39%, and electrolyte is molten caustic soda mixture, and operating temperature is 630 DEG C.
Within 2007, Chinese Academy Of Sciences Process Engineering Research Institute proposes a kind of Direct Carbon Fuel Cells in patent 200510117739.1
Cathode material and preparation method thereof, it is provided that a kind of rare earth oxide composite cathode material, mainly by Ni, Gd2O3、CeO2、
La2O3、Nd2O3、Yb2O3、ZrO2、MgO.Use the DCFC of Direct Carbon Fuel Cells of this cathode material 630 DEG C of works
When making, maximum power density is 102mW/cm2, maximum current density is 476mA/cm2, improve DCFC when middle temperature
Power density and electric current density.Use this cathode material Direct Carbon Fuel Cells DCFC 500 DEG C work time, maximum work
Rate density is 72mW/cm2, maximum current density is 328mA/cm2, obtain higher output performance when 500 DEG C, reduce
The operating temperature of DCFC.
The DCFC of foreign latest (800 DEG C-1000 DEG C) can obtain higher power density at high operating temperatures at present, but
(500 DEG C-650 DEG C) obtain when running under mesophilic condition electric current density and power density are relatively low, therefore improve middle temperature work
The problem needing solution in power density under the conditions of work and electric current density referred to as DCFC development badly.The Chinese Academy of Sciences mentions in invention
Rare earth oxide composite cathode material has the most tentatively possessed some features and the attribute of cathode material, but the group of first its material
Becoming more complicated, cost of manufacture is higher；Next, the catalysis that complex oxide combination can affect the dissociation reduction of negative electrode oxygen is active and cloudy
Pole ionic conductivity.
Summary of the invention
In order to overcome above problems of the prior art, the present invention provides the nickel lanthanide composite material of a kind of Direct Carbon Fuel Cells
Negative electrode and preparation method thereof, uses carbon consuming cell stable operation under middle temperature working condition of this nickel lanthanide composite material negative electrode, can
To significantly improve the electric current density of DCFC, power density and fuel conversion efficiency.When running for 500 DEG C-650 DEG C, the most permissible
Obtain higher power density and electric current density.
It is an object of the present invention to provide the nickel lanthanide composite material negative electrode of a kind of Direct Carbon Fuel Cells.
Direct Carbon Fuel Cells includes reaction unit, positive plate storehouse, minus plate storehouse, anode, negative electrode, anode current collector plate, negative electrode
Collector plate, microporosity separator, molten caustic soda electrolyte and carbon fuel；Wherein, in reaction unit, molten caustic soda electrolyte is held；Tubular
Positive plate storehouse and minus plate storehouse be separately positioned on the bottom of reaction unit；Anode and negative electrode are individually positioned in positive plate storehouse and negative electrode
In plate storehouse；Have pertusate anode current collector plate and cathode collector plate penetrates and extend into positive plate storehouse from the top of reaction unit respectively
With in minus plate storehouse；Between positive plate storehouse and minus plate storehouse, microporosity separator is set；Carbon fuel is placed in positive plate storehouse.
The negative electrode of the Direct Carbon Fuel Cells of the present invention is nickel lanthanide composite material negative electrode, and including bi-material, the first material is nickel,
The second material is lanthanide series metal or lanthana La2O3；Lanthanide series metal use lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium,
One in terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutecium；Wherein, the molar content of the first material nickel accounts for 85～93%, the
The molar content of two kinds of materials accounts for 7～15%.In negative electrode, lanthanum improves oxygen absorption dissociating power and the reduction catalysts activity of negative electrode,
And improve the electrical conductivity of negative electrode oxonium ion, add electrode reaction three phase boundary.Add the La of high oxygen-ion conduction in the cathode
Negative electrode can be made at high temperature to become electron-ion mixed conductor；It addition, the La in negative electrode contributes to increasing the oxidation of Ni cathode surface
The electronic conductivity of film, makes cathode surface resistance reduce, so that DCFC output performance improves.Ni cathode surface can be
Molten caustic soda and fused carbonate electrolyte are oxidized to p-type semiconductor NiO that electrical conductivity is the lowest.
Nickel lanthanide composite material negative electrode is non-planar multi-C stereo shape, and section curve is triangular waveform, zig-zag, dextrorotation
One in waveform, square waveform and corrugated, this multi-C stereo shape, add space availability ratio.
The nickel lanthanide composite material negative electrode of the present invention is processed into amorphous state and nano crystal thin film material, for Direct Carbon Fuel Cells.
Molten caustic soda electrolyte uses the mixing match solution of the combination of two or three in LiOH, KOH and NaOH.Melted
The reaction temperature of fuel cell is required lower than the reaction temperature of fused carbonate molten caustic soda electrolyte by alkali electrolyte, the most permissible
The Boudouard effectively avoiding (more than 800 DEG C) under high temperature reacts, and i.e. avoids charcoal and carbon dioxide that chemistry at high temperature occurs
Reaction produces CO (carbon monoxide converter) gas.Concrete molten caustic soda electrolyte embodiment specifically sets proportioning, including four according to case study on implementation
Kind: (1) LiOH and KOH mixing match solution, wherein, LiOH is 10～15%, and KOH is 85～90%；(2)LiOH
With NaOH mixing match solution, wherein, LiOH is 10～15%, and NaOH is 85～90%；(3) NaOH and KOH mixes
Closing proportioning solution, wherein, NaOH is 50～70%, and KOH is 30～50%；(4) LiOH, KOH and NaOH mixing is joined
Ratio solution, wherein, LiOH is 10～15%, and KOH is 40～55%, and NaOH is 30～50%.
Further object is that the preparation method of the nickel lanthanide composite material negative electrode that a kind of Direct Carbon Fuel Cells is provided.
The preparation method of the nickel lanthanide composite material negative electrode of the Direct Carbon Fuel Cells of the present invention, comprises the following steps:
1) selection proportioning: set up nickel lanthanum alloy material crystals model, according to cohesive energy calculation, screens reaction active site, chooses
Material, carries out alloy making, and the first material is nickel, and the second material is lanthanide series metal or lanthana La2O3；Lanthanum
It is that metal uses in lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutecium
A kind of；
2) casting mold is ground: with grinder (such as ball mill), the first material chosen and the second material are carried out abundant mix grinding
After, take out and dry, pressurize under 200～300MPa pressure the shape that laminates, and forms the mixing base substrate of nickel lanthanum；
3) melting processing: the mixing base substrate of laminal nickel lanthanum is placed in hot pressing furnace and is warming up to 800 DEG C～1200 DEG C, constant temperature
2～4 hours, take out after cooling and obtain nickel lanthanide composite material；
4) texturing: machinery texturing, laser roughening are passed through in the surface of nickel lanthanide composite material, increases surface roughness, cause rapids
Stream, laser roughening changes interfacial property, increases the function such as decay resistance and surface carbon Particulate accumulation degree；
5) moulding: nickel lanthanide composite material is processed into multi-C stereo shape, form nickel lanthanide composite material negative electrode, thus increase sky
Between utilization rate.
Wherein, in step 1) in, the molar content of the first material nickel accounts for 85～93%, the Mole percent of the second material
Content accounts for 7～15%.
In step 2) in, pressurize under 200～300MPa pressure the shape that laminates.
In step 5) in, the section curve of nickel lanthanide composite material negative electrode is triangular waveform, zig-zag, sinusoidal wave pattern, rectangle
One in waveform and corrugated.
Advantages of the present invention:
1. the nickel lanthanide composite material negative electrode of the present invention is easy to make big, the complex-shaped amorphous state of area and nano crystal thin film material, suitable
Conjunction is worked continuously and large-scale production；And the composition of alloy film is easily controlled, production technology is simple, and cost is relatively low；
2. the DCFC using the nickel lanthanide composite material negative electrode of the present invention transfers electric performance stablity in middle temperature, outputs higher power close
Degree and electric current density；
3. the DCFC using the nickel lanthanide composite material negative electrode of the present invention has higher fuel conversion efficiency under middle temperature；
4. the nickel lanthanide composite material that the present invention uses does not dissolves, and will not pollute molten caustic soda electrolyte and fused carbonate electrolyte.
Accompanying drawing explanation
Fig. 1 is the structural representation of Direct Carbon Fuel Cells；
Fig. 2 is the schematic diagram of the section curve of the nickel lanthanide composite material negative electrode of the Direct Carbon Fuel Cells of the present invention, and wherein, (a) is three
Angle waveform, (b) is zig-zag, and (c) is sinusoidal wave pattern, and (d) is square waveform；
Fig. 3 is the DCFC power density curve at different temperatures of the nickel lanthanide composite material negative electrode using the present invention；
Fig. 4 is the DCFC of the nickel lanthanide composite material negative electrode using the present invention power density when 500 DEG C, 580 DEG C and 630 DEG C of work
And fuel conversion efficiency curve；
Fig. 5 is the X diffraction ray XRD figure spectrum before and after pure Ni powder body and the use of nickel lanthanide composite material negative electrode.
Detailed description of the invention
Below in conjunction with the accompanying drawings, by specific embodiment, the present invention is expanded on further.
As it is shown in figure 1, the Direct Carbon Fuel Cells of the present embodiment includes: reaction unit 1, positive plate storehouse 2, minus plate storehouse 3,
Anode 7, negative electrode 8, anode current collector plate 4, cathode collector plate 5, microporosity separator 6, molten caustic soda electrolyte 10 and carbon fuel 9；
Wherein, in reaction unit 1, molten caustic soda electrolyte 10 it is full of；Positive plate storehouse 2 and the minus plate storehouse 3 of tubular are separately positioned on instead
Answer the bottom of device 1；Anode 7 and negative electrode 8 are individually positioned in positive plate storehouse 2 and minus plate storehouse 3；Has pertusate anode
Collector plate 4 and cathode collector plate 5 penetrate and extend into from the top of reaction unit positive plate storehouse and minus plate storehouse respectively；At sun
Microporosity separator 6 is set between pole plate storehouse and minus plate storehouse；Carbon fuel 9 is placed in positive plate storehouse 2.Anode current collector plate 4 and negative electrode
Collector plate 5 is respectively connecting to ammeter A.
In the present embodiment, in nickel lanthanide composite material negative electrode, the molar content of nickel accounts for 90%, the molar content 10% of lanthanum.
Molten caustic soda electrolyte uses the mixing match solution of LiOH, KOH and NaOH tri-kinds, and wherein, LiOH is 10%, KOH
It is 50% and NaOH to be 40%.
As in figure 2 it is shown, negative electrode is non-planar multi-C stereo shape, the section curve of negative electrode be triangular waveform, zig-zag,
One in sinusoidal wave pattern, square waveform and corrugated.
As it is shown on figure 3, have chosen 500 DEG C, 580 DEG C and 630 DEG C of experiments being correlated with, verify the DCFC of Ni-based composite cathode
Comprehensive output performance.Using the DCFC of nickel lanthanide composite material negative electrode of the present invention when working for 500 DEG C, maximum power density is
75mW/cm2, maximum current density is 340mA/cm2, the maximum ohmic polarization overpotential of DCFC is 490mV, at 500 DEG C
Time obtain higher output performance, reduce the operation temperature of DCFC；Use the DCFC of nickel lanthanide composite material negative electrode of the present invention
When working for 580 DEG C, maximum power density is 92mW/cm2, maximum current density is 411mA/cm2, the maximum Europe of DCFC
Nurse polarization overpotential is 580mV, obtains higher output performance when 580 DEG C, reduces the operation temperature of DCFC；Make
With the DCFC of the nickel lanthanide composite material negative electrode of the present invention when working for 630 DEG C, maximum power density is 110mW/cm2, maximum
Electric current density is 482mA/cm2, the maximum ohmic polarization overpotential of DCFC is 630mV, obtains higher when 630 DEG C
Output performance, reduces the operation temperature of DCFC.
Fig. 4 is the DCFC of the nickel lanthanide composite material negative electrode using the present invention power when 500 DEG C, 580 DEG C and 630 DEG C of work
Density and fuel conversion efficiency curve.Fuel cell terminal voltage and the ratio of theoretical voltage when fuel conversion efficiency is external resistance change.
Power efficiency curve shows, the power density of battery and fuel conversion efficiency can not reach maximum simultaneously, improves battery efficiency then
Need to reduce cell output density, when power density is too high, battery efficiency then reduces.The nickel lanthanide composite material using the present invention is cloudy
The DCFC of pole, fuel conversion efficiency best result is not 70% (500 DEG C), 73% (580 DEG C) and 75% (630 DEG C), with
The DCFC (630 DEG C) of Zecevic etc. compares, and burning conversion efficiency has been respectively increased 62%, 67% and 76%.Data show,
Use nickel lanthanide composite material negative electrode not only can improve the fuel conversion efficiency that DCFC is at 630 DEG C, and operating temperature can be made to exist
The fuel conversion efficiency of 500 DEG C and 580 DEG C improves.
Fig. 5 is the XRD figure spectrum before and after pure Ni powder body and the use of nickel lanthanide composite material negative electrode, shows composite cathode after mixed sintering
Not occurring in material that Ni with La reacts the compound generated, diffraction maximum position is not moved yet, and shows that the two is not formed any
Solid solution.This cathode material is that composite .Ni and La mixed mutually by two kinds of things has in cathode material firing temperature
, there is not significant chemical reaction in the highest chemical compatibility.
Using nickel lanthanide composite material negative electrode when 500 DEG C, 580 DEG C and 630 DEG C of work, DCFC electric current density and power density are equal
It is significantly increased.One of reason analyzing experimental result electric current and power density raising is that the La in negative electrode is favorably improved negative electrode oxygen
The catalysis activity of dissociation reduction, and improve the ionic conductance of negative electrode, add electrode reaction three phase boundary.DCFC negative electrode is sent out
Raw hydrogen reduction process is as follows:
O2+2H2O+4e-=4OH-, (1)
Following (the H in two formulas of anode of fuel cell reaction2O is the intermediate product of electrode reaction)
C+4OH-=CO2+2H2O+4e-.(2)
According to the research of Zecevic etc., in melted KOH electrolyte, the reduction of oxygen major part generates superoxide ion (O2-), its
Remaining part is divided and is reduced directly to oxonium ion.In formula (1), hydrogen reduction process is made up of following reaction
O2+ e-=O2-,(3)
O2-+3e-+2H2O=4OH-, (4)
2O2+ 4e-=2O2-,(5)
2O2-+2H2O=4OH-. (6)
Therefore, the possible cause that DCFC output performance improves is that the La in negative electrode improves the oxygen absorption dissociating power of negative electrode and goes back
Former catalysis activity, and improve the electrical conductivity of negative electrode oxonium ion, add electrode reaction three phase boundary.Add hyperoxia in the cathode
The La of ionic conductance can make negative electrode at high temperature become electron-ion mixed conductor.Another of DCFC output performance raising can
Can reason be the electronic conductivity that the La in negative electrode contributes to increasing Ni cathode surface oxide-film, make cathode surface resistance reduce.
Ni cathode surface can be oxidized to p-type semiconductor NiO that electrical conductivity is the lowest in molten caustic soda and fused carbonate electrolyte.
The preparation method of the nickel lanthanide composite material negative electrode of the Direct Carbon Fuel Cells of the present invention, comprises the following steps:
1) selection proportioning: nickel lanthanum alloy material crystals model set up by application Materials Studio software, according to cohesive energy calculation,
Screening reaction active site, chosen material, carry out alloy making, the molar content of nickel accounts for 90%, lanthanum mole
Percentage composition accounts for 10%；
2) grind casting mold: after the nickel chosen and lanthanum bi-material being carried out abundant mix grinding with ball mill, take out and dry, at 250MPa
Pressurize under pressure the shape that laminates, and forms the mixing base substrate of nickel lanthanum；
3) melting processing: the mixing base substrate of laminal nickel lanthanum is placed in hot pressing furnace and is warming up to 1000 DEG C, constant temperature 3 hours,
Take out after cooling and obtain nickel lanthanide composite material；
4) texturing: to nickel lanthanide composite material surface by machinery texturing, laser roughening, increase surface roughness, cause turbulent flow,
Laser roughening changes interfacial property, increases the function such as decay resistance and surface carbon Particulate accumulation degree；
5) moulding: nickel lanthanide composite material is processed into multi-C stereo shape, form the nickel lanthanide composite material negative electrode of corrugated, from
And increase space availability ratio.
It is finally noted that, publicize and implement the purpose of example and be that help is further appreciated by the present invention, but the technology of this area
Personnel are understood that without departing from the spirit and scope of the invention and the appended claims, and various substitutions and modifications are all can
Can.Therefore, the present invention should not be limited to embodiment disclosure of that, and the scope of protection of present invention is with claims
Define in the range of standard.
Claims (4)
1. the preparation method of a nickel lanthanide composite material negative electrode, it is characterised in that described preparation method comprises the following steps:
1) selection proportioning: set up nickel lanthanum alloy material crystals model, according to cohesive energy calculation, screens reaction active site, chooses
Material, carries out alloy making, and the first material is nickel, and the second material is lanthanide series metal or lanthana La2O3；Lanthanum
It is that metal uses in lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutecium
A kind of；
2) grind casting mold: after the first material chosen and the second material being carried out abundant mix grinding with grinder, take out and dry,
Pressurize the shape that laminates, and forms the mixing base substrate of nickel lanthanum；
3) melting processing: the mixing base substrate of laminal nickel lanthanum is placed in hot pressing furnace and is warming up to 800 DEG C～1200 DEG C, constant temperature
2～4 hours, take out after cooling and obtain nickel lanthanide composite material；
4) texturing: machinery texturing, laser roughening are passed through in the surface of nickel lanthanide composite material, increases surface roughness, cause rapids
Stream, laser roughening changes interfacial property, increases decay resistance and the function of surface carbon Particulate accumulation degree；
5) moulding: nickel lanthanide composite material is processed into multi-C stereo shape, form nickel lanthanide composite material negative electrode, thus increase sky
Between utilization rate.
2. preparation method as claimed in claim 1, it is characterised in that in step 1) in, the Mole percent of the first material nickel contains
Amount accounts for 85～93%, and the molar content of the second material accounts for 7～15%.
3. preparation method as claimed in claim 1, it is characterised in that in step 2) in, pressurize under 200～300MPa pressure
Laminate shape.
4. preparation method as claimed in claim 1, it is characterised in that in step 5) in, the section of nickel lanthanide composite material negative electrode is bent
Line is the one in triangular waveform, zig-zag, sinusoidal wave pattern, square waveform and corrugated.
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| CN111416141B (en) | 2020-04-03 | 2021-10-19 | 内蒙古工业大学 | Molten hydroxide direct carbon fuel cell and power generation device including the same |
| CN114349127A (en) * | 2022-01-10 | 2022-04-15 | 烟台大学 | Stainless steel-based lanthanum/samarium/cerium dioxide anti-fouling electrode membrane and preparation process and application thereof |
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| CN1964112A (en) * | 2005-11-09 | 2007-05-16 | 中国科学院过程工程研究所 | A cathode material for direct carbon fuel cell and its manufacture method |
| CN104733760A (en) * | 2015-03-09 | 2015-06-24 | 扬州雷鸥电业有限公司 | Serial-connection breath-type double-plate cabin solid carbon fuel cell stack and power generation method thereof |
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| CN1964112A (en) * | 2005-11-09 | 2007-05-16 | 中国科学院过程工程研究所 | A cathode material for direct carbon fuel cell and its manufacture method |
| CN104733760A (en) * | 2015-03-09 | 2015-06-24 | 扬州雷鸥电业有限公司 | Serial-connection breath-type double-plate cabin solid carbon fuel cell stack and power generation method thereof |
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