WO2021196812A1

WO2021196812A1 - Molten hydroxide direct carbon fuel cell and power generation device comprising same

Info

Publication number: WO2021196812A1
Application number: PCT/CN2021/000048
Authority: WO
Inventors: 高艳芳; 李利军; 邢丽
Original assignee: 内蒙古工业大学
Priority date: 2020-04-03
Filing date: 2021-03-22
Publication date: 2021-10-07
Also published as: CN111416141A; CN111416141B; JP2023519435A; JP7448170B2

Abstract

A molten hydroxide direct carbon fuel cell and a power generation device comprising same. The molten hydroxide direct carbon fuel cell comprises a carbon slurry storage device (1), an anode chamber (3), a cathode chamber (5), an anode current collector (2), a cathode current collector (4), an anode current-collecting lead (6), a cathode current-collecting lead (7), a thermocouple sleeve (8), carbon slurry feed pipes (11, 12, 13), a molten hydroxide electrolyte (19), a carbon fuel (18), and a cathode chamber oxygen supply device; the carbon slurry storage device (1), the anode chamber (3), and the cathode chamber (5) are provided in such a manner that the heights of the positions of the lower surfaces thereof are increased in sequence, and the upper surface of the anode chamber (3) is higher than the upper surface of the carbon slurry storage device (1) and lower than the upper surface of the cathode chamber (5). Provided is a novel fuel-continuous-supplied-type direct carbon fuel cell structure, which compensates for the lack of a continuous operation power-generation mode of direct carbon fuel cells; the cathode and anode chambers are arranged in a staggered manner, so that an electrolyte flows from the cathode chamber to the anode chamber by means of gravity to realize ion migration, avoiding the usage of traditional ion exchange membranes between the cathode and anode chambers.

Description

Molten hydroxide direct carbon fuel cell and power generation device containing the same

Technical field

The present invention relates to a molten hydroxide direct carbon fuel cell and a power generation device containing the same, and more particularly to a continuous fuel supply type molten hydroxide direct carbon fuel cell and a power generation device containing the same.

Background technique

Electricity is the main energy source for the steady growth of my country's national economy, and it is also a key driving force for people to participate in social activities. Due to the limitation of the thermal engine Carnot cycle, the traditional thermal power generation technology has low power generation efficiency and serious environmental pollution. Therefore, this kind of power generation technology that wastes resources and pollutes the environment urgently needs to be replaced by emerging high-efficiency and environmentally-friendly power generation technologies.

Fuel cell is an emerging power generation technology that directly converts chemical energy in fuel into electrical energy. Because it is not restricted by the Carnot cycle, its power generation is more efficient and green, and it has received extensive attention from scholars from all over the world. Among them, batteries using solid carbon as fuel (referred to as direct carbon fuel cells) have attracted much attention from various countries due to the high energy density and wide sources of carbon fuels. In addition, the theoretical thermodynamic efficiency of direct carbon fuel cells can be as high as 100%, storage and transportation are more convenient, and some waste biomass charcoal can also be used as fuel. These advantages of direct carbon fuel cells make them more suitable for countries like my country that use coal as their main energy source.

Direct carbon fuel cells can be divided into molten carbonate direct carbon fuel cells, solid oxide direct carbon fuel cells, hybrid direct carbon fuel cells, and molten hydroxide direct carbon fuel cells. The first three types of batteries have high operating temperatures, which leads to a Boudouard reaction inside the battery, which reduces the efficiency of solid carbon utilization. In addition, high temperature places high requirements on battery materials, which is not conducive to large-scale production. In addition, the first three types of direct carbon fuel cells all use diaphragms to separate the anode and cathode chambers, causing material waste and difficulty in cleaning and maintenance. Molten hydroxide direct carbon fuel cells have received increasing attention from scholars all over the world due to the advantages of low operating temperature, no wave-multiple reaction, and lower requirements for battery materials.

Taking sodium hydroxide as an electrolyte as an example, the operating principle of a molten hydroxide direct carbon fuel cell can be described as follows: Under suitable temperature conditions, the cathode oxygen undergoes a reduction reaction to release oxygen anions, and forms a potential difference with the external circuit ( Formula (1)), the negative oxygen ions in the cathode chamber flow with the electrolyte to the anode chamber. The anode carbon fuel reacts with oxygen anions to generate CO ₂ , which releases electrons (formula (2)), and the lost electrons flow to the cathode through the external circuit. Generate electricity by circulating the ions and electrons mentioned above. The overall response of the battery can be expressed by formula (3).

The cathode reaction _{^{O 2 + 2NaOH = 2NaOOH - -2e}} - (1)

The anode reaction is ^{_{C + 2NaOOH - = CO 2 +}} 2NaOH + 2e - (2)

Total reaction C+O ₂ =CO ₂ (3)

In recent years, with the encouragement and support of clean power generation technologies from countries around the world, the research of molten hydroxide direct carbon fuel cells by experts and scholars has increased. Since 1896 JACQUES established the first intermittently operated molten hydroxide direct carbon fuel cell, the batteries used by subsequent scholars are also of this type of intermittent operation mode structure.

Zecevic et al. used graphite rods as both anode and fuel, and molten hydroxide as electrolyte to investigate the battery performance. The increase in battery operating time leads to a smaller anode fuel rod diameter, which in turn increases the anode-cathode spacing, which leads to an increase in the ohmic polarization of the battery. Oxygen diffusion on the cathode surface, which is limited by the oxygen feed rate, is the main factor limiting the oxygen reduction reaction and battery performance, and excessive oxygen will reduce the conductivity of the electrolyte.

Hackett et al. investigated the impact of different carbon fuels on the battery performance. When the battery uses carbon with a small specific surface area as a fuel, the contact performance between the anode and the electrolyte becomes poor, and the battery performance decreases.

Guo et al. used particulate carbon as fuel instead of rod fuel to investigate the performance of the battery under different conditions. The setting of the cathode gas distributor can significantly improve the battery performance. The battery is still limited by cathode oxygen transport. The anode active reaction area is located in the contact area of the anode, fuel and electrolyte.

Kacprzak et al. used the change in the weight of the reactor before and after the reaction to measure the ability of the material to withstand alkali under melting and high temperature conditions. Nickel and nickel-based alloys have the best corrosion resistance to molten hydroxide. The NaOH-KOH molten electrolyte battery with a molar ratio of 50-50 mol% has the highest open circuit voltage and output power density at a temperature of 723K. When carbon with different properties is used as fuel, the contribution of each polarization to the battery is different. Higher carbon content, richer oxygen-containing functional groups and larger specific surface area are conducive to better contact between carbon fuel and electrolyte and improve battery performance.

The researches on molten hydroxide direct carbon fuel cells mentioned in the above-mentioned documents all have defects. The main problem is that the cathode oxygen transmission rate is not enough and the anode active reaction area decreases with the increase of reaction time, which will cause the degradation of battery performance.

Summary of the invention

The problem to be solved by the invention

In order to solve the problems in the prior art, the inventors conducted in-depth research. Based on the conclusion of Kacprzak and Hackett et al. that improving the fuel supply state by changing the carbon properties can improve the battery performance, if carbon fuel can be supplied to the anode chamber in time and oxygen anions can flow continuously from the cathode chamber to the anode chamber, the battery performance can be improved. .

In addition, in the prior art, no direct carbon fuel cell structure with continuous fuel supply has been discovered, and there is no related report on the continuous operation power generation mode in the field of direct carbon fuel cells.

In addition, the operating temperature of the existing direct carbon fuel cell is too high, generally operating at a temperature above 700°C, which places higher requirements on the material of the battery device, and the possibility of battery side reactions also increases.

Moreover, in the existing batteries, the ion exchange membrane between the anode and cathode compartments is traditionally used, and the use of this membrane requires frequent replacement, and the production cost and labor cost are relatively high.

Solutions used to solve the problem

In order to solve the technical problems existing in the prior art, the present invention provides the following technical solutions:

To this end, the purpose of the present invention is how to achieve continuous supply of carbon fuel to the anode and sufficient cathode oxygen anions to flow to the anode chamber, thereby providing a molten hydroxide direct carbon fuel cell with continuous carbon fuel feeding and controllable speed. In addition, The present invention also provides a migration mode of cathode oxygen negative ions flowing from the cathode chamber to the anode chamber along with the electrolyte by gravity. Increase the amount of fuel that is continuously supplied to the anode, and increase the amount of cathode oxygen anions that are quickly supplied to the anode.

In order to achieve the above objective, the present invention provides the following molten hydroxide direct carbon fuel cell and a power generation device containing the same.

1. A molten hydroxide direct carbon fuel cell, the molten hydroxide direct carbon fuel cell comprising: a carbon slurry storage, an anode chamber, a cathode chamber, an anode current collecting plate, a cathode current collecting plate, an anode current collecting lead, Cathode collector lead, thermocouple bushing, carbon slurry feed pipe, molten hydroxide electrolyte, carbon fuel, cathode chamber oxygen supply device, characterized in that: the carbon slurry is arranged in a manner of sequentially increasing the position of the lower surface The storage, the anode chamber and the cathode chamber, and the upper surface of the anode chamber is higher than the upper surface of the carbon paste storage and lower than the upper surface of the cathode chamber.

2. The molten hydroxide direct carbon fuel cell according to item 1, characterized in that an overflow tank is provided between the upper part of the anode chamber and the upper part of the carbon slurry storage.

3. The molten hydroxide direct carbon fuel cell according to items 1 and 2, characterized in that a cathode and anode electrolysis is provided between the upper part of the anode chamber and the part of the cathode chamber higher than the upper surface of the anode chamber A liquid migration channel, so that the oxygen anions in the cathode chamber flow into the anode chamber through the cathode and anode electrolyte migration channel along with the electrolyte by gravity.

4. The molten hydroxide direct carbon fuel cell according to item 3, characterized in that the lower surface of the cathode chamber is partially overlapped on the upper surface of the anode chamber, and the cathode and anode electrolyte migration channel The cathode and anode electrolyte migration channel is arranged at the overlapping part as a communication hole between the cathode and anode chambers.

5. The molten hydroxide direct carbon fuel cell according to any one of items 1 to 4, characterized in that the cell further comprises a cathode and anode collector plate fixing column.

6. The molten hydroxide direct carbon fuel cell according to any one of items 1 to 5, characterized in that the cell further includes an air pipeline and an air compression pump.

7. The molten hydroxide direct carbon fuel cell according to any one of items 1-6, characterized in that the cell includes a heater.

8. The battery according to item 7, characterized in that the heater is used for heating all battery devices except the air compression pump.

9. The molten hydroxide direct carbon fuel cell according to any one of items 1-8, characterized in that the anode current collecting plate and the cathode current collecting plate are respectively located in the anode chamber and the cathode chamber, and the anode current collecting lead And the cathode current collecting lead are respectively located on the anode current collecting plate and the cathode current collecting plate, the thermocouple is inserted into the battery through the cathode chamber to test the temperature of the battery during operation, and the cathode chamber and the anode chamber are respectively arranged The cathode and anode current collecting plate fixing posts are used to fix the cathode current collecting plate and the anode current collecting plate.

10. The molten hydroxide direct carbon fuel cell according to any one of items 1-9, characterized in that the carbon paste storage is placed at a position lower than the anode chamber, and the anode chamber is placed at a position lower than the cathode Chamber, the carbon fuel and the hydroxide powder are mixed and placed into the carbon slurry storage and driven into the anode chamber by the air compression pump. The cathode chamber is also preliminarily placed with hydroxide, the The carbon slurry feed pipe is located at the bottom of the carbon slurry storage and anode chamber.

11. The molten hydroxide direct carbon fuel cell according to item 10, characterized in that one end of the air pipe is connected to the air compression pump, and the other end is connected to the carbon slurry feed pipe, and is lower than In the carbon slurry feed pipe, the air entering the carbon slurry feed pipe is cut off close to the bottom of the anode chamber.

12. The molten hydroxide direct carbon fuel cell according to any one of items 1-11, characterized in that: the carbon paste storage, the anode chamber and the cathode chamber are located in a heater.

13. The molten hydroxide direct carbon fuel cell according to any one of items 1-12, characterized in that: the carbon fuel mixed with the electrolyte in the carbon slurry storage to form the carbon slurry has a particle size of millimeters or micrometers and a ratio of Carbon with a surface area range of 2-680 m ² g ^-1 , a conductivity range of 70-12900 S m ^-1 , and a density range of 0.5-1.4 g cm ^-3 .

14. The molten hydroxide direct carbon fuel cell according to any one of items 1-13, wherein the molten hydroxide electrolyte is one of sodium hydroxide, potassium hydroxide, and potassium hydroxide Or multiple mixtures.

15. The molten hydroxide direct carbon fuel cell according to any one of items 1-14, characterized in that: the carbon paste storage, the anode chamber, the cathode chamber, the anode current collecting plate, the The cathode current collecting plate, the anode current collecting lead, the cathode current collecting lead, the thermocouple sleeve, the carbon slurry feed pipe, the cathode and anode electrolyte migration channel, and the overflow tank are used The materials are all copper-nickel Monel alloy.

16. The molten hydroxide direct carbon fuel cell according to item 12, characterized in that the material used for the heater is 316 stainless steel and thermal insulation cotton.

17. The molten hydroxide direct carbon fuel cell according to any one of items 1-16, characterized in that the flow rate adjustment range of the air compression pump is 10 ^-5 m s ^-1 -10 ^-1 m s ^-1 .

18. The molten hydroxide direct carbon fuel cell according to any one of items 1-17, characterized in that the operating temperature range of the battery in the heater is 200-690°C, preferably 240-650°C, more preferably 350-550°C.

19. The molten hydroxide direct carbon fuel cell according to any one of items 1-18, characterized in that: the carbon slurry fluid composed of the carbon fuel and the molten hydroxide electrolyte mixture is composed of a compressed air pump. The carbon paste storage is continuously supplied to the anode chamber.

20. The molten hydroxide direct carbon fuel cell according to item 1, characterized in that: the length, width and height of the anode and cathode chamber of the battery are 145-150mm, 15-20mm, 55-60mm, respectively, and the cathode and anode current collectors are long The width and height are 135-140mm, 1.5-2mm, and 50-55mm respectively, and the inlet pipe diameter of the anode chamber is 5-6mm.

21. A power generation device comprising the molten hydroxide direct carbon fuel cell in item 1-20, or integrated by one or more molten hydroxide direct carbon fuel cells in item 1-20.

The effect of the invention

Compared with the prior art, the present invention has the following beneficial effects:

(1) A new type of continuous fuel supply direct carbon fuel cell structure is provided, which makes up for the blank of the direct carbon fuel cell's non-continuous operation power generation mode; (2) The theoretical energy conversion efficiency of the direct carbon fuel cell is as high as 100%, and The efficiency of traditional thermal power plants is only about 30%. (3) The direct carbon fuel cell can operate in a temperature range lower than 700°C, avoiding the occurrence of Bodo reaction. (4) The cathode and anode are arranged in a staggered arrangement, and the electrolyte uses gravity to flow from the cathode chamber to the anode chamber to realize ion migration, avoiding the use of ion exchange membranes between the traditional cathode and anode chambers.

Description of the drawings

Figure 1 is a schematic diagram of the structure of a molten hydroxide direct carbon fuel cell of the present invention.

Figure 2 is an enlarged view of the location of the communicating hole of the cathode and anode chambers.

Figure 3 shows the current and voltage performance during the battery life cycle.

Description of reference signs:

1: carbon paste storage; 2: anode current collecting plate; 3: anode chamber; 4: cathode current collecting plate; 5: cathode chamber; 6: anode current collecting lead; 7: cathode current collecting lead; 8: thermocouple bushing 9: the connecting hole between the cathode and anode chamber; 10: overflow tank; 11, 12, 13: carbon slurry feed pipe; 14: air pipeline; 15: air pipeline section; 16: air compression pump; 17: heater ; 18: Carbon fuel; 19: Molten hydroxide electrolyte.

Detailed ways

The molten hydroxide direct carbon fuel cell of the present invention includes: carbon paste storage, anode chamber, cathode chamber, anode current collecting plate, cathode current collecting plate, anode current collecting lead, cathode current collecting lead, thermocouple bushing, carbon slurry Feeding pipe, molten hydroxide electrolyte, carbon fuel, cathode chamber oxygen supply device, wherein: the carbon slurry storage, the anode chamber and the cathode chamber are arranged in a manner of sequentially increasing the position of the lower surface, and The upper surface of the anode chamber is higher than the upper surface of the carbon paste storage and lower than the upper surface of the cathode chamber.

The carbon fuel can use coal from coal-rich areas in Inner Mongolia, and/or other carbon-containing materials such as bituminous coal, carbon black, activated carbon, and biochar such as straw.

The molten hydroxide electrolyte may be one or more of sodium hydroxide, potassium hydroxide, and lithium hydroxide.

The invention adopts a two-chamber fuel cell structure with the anode chamber on the bottom and the cathode chamber on the top. This structure can prevent the carbon slurry in the anode chamber from flowing into the cathode chamber, and at the same time, can control the molten hydroxide ions in the cathode chamber at different speeds. Supply the anode chamber. At the same time, the use of ion exchange membranes between the traditional cathode and anode compartments is avoided.

Before the device is heated, a certain proportion of a certain amount of molten hydroxide powder and a carbon fuel mixture (carbon slurry) is charged into the carbon slurry storage, and at the same time, a certain amount of hydroxide powder is charged into the cathode chamber.

The mixing ratio of molten hydroxide powder and carbon fuel is generally 3%-14%.

The amount of the molten hydroxide powder and the carbon fuel mixture (carbon slurry) is not particularly limited, and is set according to the cell size and needs.

The structural size of the molten hydroxide direct carbon fuel cell of the present invention is not particularly limited, and can be set according to actual needs.

The battery operating temperature range is 200-690°C, preferably 240-650°C, and more preferably 350-550°C.

Hereinafter, the present invention will be described in detail with reference to FIG. 1. However, the technical solution shown in FIG. 1 is only a preferred embodiment, and the present invention is not limited to this embodiment.

As shown in Figure 1, the molten hydroxide direct carbon fuel cell of the present invention includes a carbon paste storage 1; an anode collector plate 2; an anode chamber 3; a cathode collector plate 4; a cathode chamber 5; an anode collector lead 6; a cathode collector Flow lead 7; thermocouple sleeve 8; cathode and anode chamber communication hole 9; overflow tank 10; carbon

slurry feed pipe

11, 12, 13; air pipe 14; air pipe section 15; air compression pump 16; heating器17; Carbon fuel 18; Molten hydroxide electrolyte 19.

The anode chamber 3, the anode current collecting plate 2, the anode current collecting lead 6, the cathode chamber 5, the cathode current collecting plate 4, the cathode current collecting lead 6, the thermocouple sleeve 8, the overflow tank 10, the carbon

slurry feed pipe

11, 12, 13, air pipeline 14, carbon fuel 18, molten hydroxide electrolyte 19, and the cathode and anode chamber communication holes 9 are all located at the overlapping position of the lower plate of the cathode chamber and the upper plate of the anode chamber, inside the heater 17. The anode current collecting plate 2 is located in the anode chamber 3, the cathode current collecting plate 4 is located in the cathode chamber 5, and the thermocouple sleeve 8 is located in the cathode chamber 5 for placing a thermocouple for detecting the battery temperature, so The anode current collecting lead 6 is located in the anode chamber 3, the cathode current collecting lead 7 is located in the cathode chamber 5, and the carbon

slurry feed pipes

11, 12, 13 are connected to the bottom of the carbon slurry storage 1 and the anode chamber 3, so that The carbon slurry flowing out of the carbon slurry storage 1 is driven into the anode chamber 3, and the air pipe 14 is connected to the external air compression pump 16 of the heater 17 and connected to the carbon slurry feeding pipes 12 and 13 inside the heater 17, The carbon slurry is squeezed into the anode chamber 3 by gas pressure. The 15 is a cross-sectional view of the 14 air pipeline, which means that the tube is full of gas. The cathode and anode chamber communication holes 9 are used to make the cathode chamber 5 contain The oxygen negative ion electrolyte flows to the anode chamber 3 by gravity. The overflow tank 10 is located at the top of the anode chamber 3 and extends to the upper part of the carbon slurry storage 1 for circulating and overflowing the carbon slurry fluid. The heater 17 is used for heating the air-removing compression pump. External battery related devices.

The above-mentioned carbon paste storage 1, cathode chamber 5 and anode chamber 3 are staggeredly arranged in the heater 17. The position of the carbon paste storage 1 is the lowest, the anode chamber 3 is the second, and the cathode chamber 5 is the highest.

The above-mentioned carbon fuel 18 is carbon with different active specific surface area, conductivity, and density.

The particle size of the carbon fuel 18 is millimeter or micrometer level.

The molten hydroxide electrolyte solution 19 is NaOH.

The operating temperature of the direct carbon fuel cell with molten hydroxide in the heater is 350-550°C.

The structural dimensions of the molten hydroxide direct carbon fuel cell: the length, width and height of the anode compartment 3 and the cathode compartment 5 of the battery are 145-150mm, 15-20mm, 55-60mm, respectively, the anode current collecting plate 2 and the cathode current collecting plate 4 The length, width, and height are 135-140mm, 1.5-2mm, 50-55mm, respectively. The anode chamber 3 has an inlet pipe diameter of 5-6mm, using molten NaOH as electrolyte, and carbon with a particle size of millimeters or micrometers as fuel. The battery operating temperature is 350-550°C. When the battery is working, the carbon slurry mixture composed of carbon fuel and molten hydroxide is first stored in the carbon slurry storage 1, and the carbon slurry flowing out through the carbon slurry feed pipe is driven into the carbon slurry storage 1 through the air compression pump 16 and the air pipe 14. In the anode chamber 3, due to the continuous supply of carbon slurry, combined with the speed of the electrochemical reaction of the carbon fuel 18, the excess carbon slurry supplied to the anode chamber 3 flows back into the carbon slurry storage 1 through the overflow tank 10, and the carbon fuel 18 is in Oxidation reaction occurs at a suitable temperature to lose electrons, and the lost electrons flow out of the external circuit. The negative oxygen ions in the cathode chamber 5 flow into the anode chamber 3 along with the molten hydroxide due to gravity and the communication hole 9 of the anode and cathode chambers. The battery generates electricity through the circulation of such electronic ions. The battery current is about 60mA at 550°C. The battery performance is shown in Figure 3.

In this battery, the anode current collecting plate 2 and the cathode current collecting plate 4 provide electron export and introduction paths for the electrochemical oxidation reaction of carbon fuel and the electrochemical reduction reaction of oxygen. The advantages of this molten hydroxide direct carbon fuel cell are: (1) The carbon fuel is continuously supplied to the anode chamber through an air compression pump, realizing the goal of timely contact between the carbon fuel, the electrolyte and the anode; (2) the anode chamber and the cathode chamber With staggered arrangement, the negative oxygen ions in the electrolyte of the cathode chamber can flow into the anode chamber by gravity, eliminating the use of traditional membranes and ensuring sufficient ion migration; (3) The battery has a small space, compact structure, easy cleaning and maintenance, and large-scale production.

Claims

A molten hydroxide direct carbon fuel cell, the molten hydroxide direct carbon fuel cell comprising: a carbon paste storage, an anode chamber, a cathode chamber, an anode current collector plate, a cathode current collector plate, an anode current collector lead, a cathode collector The flow lead, the thermocouple sleeve, the carbon slurry feed pipe, the molten hydroxide electrolyte, the carbon fuel, and the oxygen supply device of the cathode chamber are characterized in that the carbon slurry storage is arranged in a way that the lower surface position is sequentially increased, The anode chamber and the cathode chamber, and the upper surface of the anode chamber is higher than the upper surface of the carbon paste storage and lower than the upper surface of the cathode chamber.
The molten hydroxide direct carbon fuel cell according to claim 1, wherein an overflow tank is provided between the upper part of the anode chamber and the upper part of the carbon slurry storage.
The molten hydroxide direct carbon fuel cell according to any one of claims 1 and 2, characterized in that a cathode and anode are provided between the upper part of the anode chamber and the part of the cathode chamber higher than the upper surface of the anode chamber. The electrolytic solution migration channel is used so that the negative oxygen ions in the cathode chamber flow into the anode chamber through the cathode and anode electrolytic solution migration channel along with the electrolyte by gravity.
The molten hydroxide direct carbon fuel cell according to claim 3, wherein the lower surface of the cathode chamber is partially overlapped on the upper surface of the anode chamber, and the cathode and anode electrolyte migration channels are provided In the overlapping part, the cathode and anode electrolyte migration channel is a communication hole between the cathode and anode chambers.
The molten hydroxide direct carbon fuel cell according to any one of claims 1 to 4, characterized in that the cell further comprises a cathode and anode collector plate fixing column.
The molten hydroxide direct carbon fuel cell according to any one of claims 1 to 5, characterized in that the cell further comprises an air pipeline and an air compression pump.
The molten hydroxide direct carbon fuel cell according to any one of claims 1 to 6, characterized in that the cell includes a heater.
The battery according to claim 7, wherein the heater is used for heating all battery devices except the air compression pump.
The molten hydroxide direct carbon fuel cell according to any one of claims 1-8, wherein the anode current collecting plate and the cathode current collecting plate are respectively located in the anode chamber and the cathode chamber, and the anode current collecting lead and The cathode current collecting leads are respectively located on the anode current collecting plate and the cathode current collecting plate, the thermocouple is inserted into the battery through the cathode chamber to test the battery operating temperature, and the cathode and anode are respectively arranged in the cathode chamber and the anode chamber. The electrode current collecting plate fixing plate is used to fix the cathode current collecting plate and the anode current collecting plate.
The molten hydroxide direct carbon fuel cell according to any one of claims 1-9, wherein the carbon paste storage is placed at a position lower than the anode chamber, and the anode chamber is placed at a position lower than the cathode chamber. The carbon fuel and the hydroxide powder are mixed and placed into the carbon slurry storage and driven into the anode chamber by the air compression pump. The cathode chamber is also pre-placed with hydroxide, and the carbon The slurry feed pipe is located at the bottom of the carbon slurry storage and the anode chamber.
The molten hydroxide direct carbon fuel cell according to claim 10, wherein one end of the air pipe is connected to the air compression pump, and the other end is connected to the carbon slurry feed pipe, and is lower than the The carbon slurry feed pipe, and the air entering the carbon slurry feed pipe is cut off close to the bottom of the anode chamber.
The molten hydroxide direct carbon fuel cell according to any one of claims 1-11, wherein the carbon fuel mixed with the electrolyte in the carbon slurry storage to form the carbon slurry has a particle size of millimeters or micrometers and a specific surface area. Carbon with a range of 2-680 m 2 g -1 , a conductivity range of 70-12900 S m -1 , and a density range of 0.5-1.4 g cm -3 .
The molten hydroxide direct carbon fuel cell according to any one of claims 1-12, wherein the molten hydroxide electrolyte is one of sodium hydroxide, potassium hydroxide, and lithium hydroxide or A variety of mixtures.
The molten hydroxide direct carbon fuel cell according to any one of claims 1-13, wherein the carbon slurry fluid composed of a mixture of carbon fuel and molten hydroxide electrolyte is supplied by an air compression pump. The carbon paste storage is continuously supplied to the anode chamber.
A power generation device comprising the molten hydroxide direct carbon fuel cell of claims 1-14, or integrated with one or more of the molten hydroxide direct carbon fuel cells of claims 1-14.