Carbon dioxide source concentration difference power generation battery system

Abstract

The invention relates to the field of energy storage and conversion, in particular to a carbon dioxide source concentration difference power generation battery system which comprises the following parts: a carbon dioxide capture solution, electrolyte ions, an ion exchange membrane, electrodes and a circuit, the carbon dioxide capture solution is prepared from water, tertiary amine and primary amine; tertiary amine and primary amine in a specific proportion in the carbon dioxide capture solution have high carbon dioxide affinity, carbon dioxide can be captured in a primary battery, hydrogen ions in a left cell and a right cell of the battery can generate concentration difference in the carbon dioxide capture process, hydrogen ion membrane expansion transportation can occur under the action of hydrogen ion concentration gradient, and the carbon dioxide can be captured in the primary battery. The osmotic energy is converted into electric potential energy, so that concentration difference power generation is realized; compared with the prior art, the design method of the battery system is simple, various added electrolytes are low in price, and the battery system is suitable for large-scale production, so that the battery system has a wider application prospect.

Description

Technical Field

[0001] The present invention relates to the field of energy storage and conversion, and in particular to a carbon dioxide source concentration difference power generation battery system. Background Art

[0002] The energy used today is mainly fossil fuels, but the excessive use of fossil fuels will lead to the greenhouse effect of a large amount of carbon dioxide. At the same time, limited fossil fuels are difficult to meet the growing consumer demand, and the gap between supply and demand continues to widen, which will make the competition for energy resources increasingly urgent. Therefore, the development of clean energy and renewable energy is crucial to the sustainable development of human society. As a non-fossil energy, osmotic energy comes from the Gibbs free energy released after mixing solutions of different concentrations, and has great application potential and development value.

[0003] Among them, there are few reports on the research of carbon dioxide source osmotic energy conversion technology obtained by combining carbon dioxide capture technology with osmotic energy conversion technology. The carbon dioxide source osmotic energy conversion device is divided into three parts, namely electrodes, carbon dioxide capture solution and membrane materials. However, the carbon dioxide source concentration difference power generation battery prepared by the existing technology not only has a high internal resistance, but also has relatively low open circuit voltage and short circuit current, so the maximum output power density is also relatively low.

[0004] Therefore, according to the above-mentioned related technologies, it is urgent to develop a carbon dioxide source concentration difference power generation battery system. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a carbon dioxide source concentration difference power generation battery system to solve the problem of low maximum output power density of the battery in the prior art.

[0006] Based on the above objectives, the present invention provides a carbon dioxide source concentration difference power generation battery system.

[0007] A carbon dioxide source concentration difference power generation battery system, the battery system comprising the following parts: a carbon dioxide capture solution, electrolyte ions, an ion exchange membrane, electrodes and a circuit;

[0008] The carbon dioxide capture solution is prepared from water, tertiary amine and primary amine.

[0009] Preferably, the preparation method of the carbon dioxide capture solution is as follows:

[0010] The tertiary amine and the primary amine are sequentially added into water and mixed evenly to obtain a carbon dioxide capture solution.

[0011] Preferably, the tertiary amine is any one of 1,8-diazabicyclo[5.4.0]undec-7-ene and 1,5,7-triazabicyclo[4.4.0]dec-5-ene.

[0012] Preferably, the primary amine is any one of ethanolamine and 2-amino-2-methyl-1-propanol.

[0013] Preferably, the volume ratio of the tertiary amine, the primary amine and water is 5-10:2-5:100-120.

[0014] Preferably, the electrolyte ion is any one of potassium phosphate, potassium sulfate, potassium nitrate, lithium nitrate and sodium nitrate.

[0015] Preferably, the ion exchange membrane is any one of Fumasep's FKE-50 cation exchange membrane, Fumasep's FKB-PK-130 cation exchange membrane, Fumasep's FS-990-PK cation exchange membrane, Fumasep's F-10120 cation exchange membrane, Dupont's N211 proton exchange membrane, Dupont's N115 proton exchange membrane, and Dupont's N117 proton exchange membrane.

[0016] Preferably, the electrode is any one of a titanium electrode, a copper electrode, a silver electrode, a platinum electrode, a graphite electrode, and a carbon nanotube electrode.

[0017] Beneficial effects of the present invention:

[0018] The present invention provides a carbon dioxide source concentration difference power generation battery system. The tertiary amine and primary amine in a specific ratio in the carbon dioxide capture solution used in the present invention have strong carbon dioxide affinity, and can capture carbon dioxide in the original battery. In the process of capturing carbon dioxide, a concentration difference will be generated in the hydrogen ions of the left and right cells of the battery. Under the action of the hydrogen ion concentration gradient, hydrogen ion membrane diffusion transport will occur, and the osmotic energy will be converted into electric potential energy, thereby realizing concentration difference power generation. Compared with the prior art, the design method of the battery system of the present invention is simple, and the various electrolytes added are all low-priced and suitable for large-scale production, so it has a wider application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the mechanism of the carbon dioxide source concentration difference power generation cell of the present invention;

[0021] Figure 2 This is a schematic diagram of a carbon dioxide source concentration difference power generation battery device of the present invention;

[0022] Figure 3 The conductivity diagram of the carbon dioxide source concentration difference power generation battery system of the present invention with 2 mol of potassium nitrate, lithium nitrate and sodium nitrate added respectively;

[0023] Figure 4 The open circuit voltage and short circuit current diagrams of adding 2 mol of potassium nitrate, lithium nitrate and sodium nitrate to the carbon dioxide source concentration difference power generation battery system of the present invention respectively;

[0024] Figure 5 The output power density diagram of adding 2 mol of potassium nitrate, lithium nitrate and sodium nitrate to the carbon dioxide source concentration difference power generation battery system of the present invention respectively;

[0025] Figure 6 This is an output power density optimization diagram of the carbon dioxide source concentration difference power generation battery system of the present invention when adding different concentrations of potassium nitrate;

[0026] Figure 7 This is an electrochemical impedance optimization diagram of the carbon dioxide source concentration difference power generation battery system of the present invention when adding different concentrations of potassium nitrate. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0028] The sources and properties of some of the raw materials used in the present invention are as follows:

[0029] 1,8-diazabicyclo[5.4.0]undec-7-ene was purchased from Hubei Xinhongli Chemical Co., Ltd., CAS: 6674-22-2; 1,5,7-triazabicyclo[4.4.0]dec-5-ene was purchased from Hubei Xinkang Pharmaceutical Chemical Co., Ltd., CAS: 5807-14-7; ethanolamine was purchased from Shandong Zhengxing New Materials Co., Ltd., CAS: 141-43-5; 2-amino-2-methyl-1-propanol was purchased from Hubei Julongtang Pharmaceutical Chemical Co., Ltd., CAS: 124-68-5; potassium phosphate was purchased from Shanghai Jiachen Chemical Co., Ltd., CAS: 7778-53-2; potassium sulfate was purchased from Langfang Nabo Chemical Technology Co., Ltd., CAS: 7778-80-5; lithium nitrate was purchased from Hubei Tosoh Chemical Technology Co., Ltd. Co., Ltd., CAS: 7790-69-4; Fumasep's FKE-50 cation exchange membrane was purchased from Suzhou Sheng'ernuo Technology Co., Ltd., Fumasep's FKB-PK-130 cation exchange membrane was purchased from Suzhou Sheng'ernuo Technology Co., Ltd., Fumasep's FS-990-PK cation exchange membrane was purchased from Suzhou Sheng'ernuo Technology Co., Ltd., Fumasep's F-10120 cation exchange membrane was purchased from Suzhou Sheng'ernuo Technology Co., Ltd., Dupont's N211 proton exchange membrane was purchased from Suzhou Sheng'ernuo Technology Co., Ltd., Dupont's N115 proton exchange membrane was purchased from Suzhou Sheng'ernuo Technology Co., Ltd., and Dupont's N117 proton exchange membrane was purchased from Suzhou Sheng'ernuo Technology Co., Ltd.

[0030] Example 1: A carbon dioxide source concentration difference power generation battery system, the preparation method is as follows:

[0031] S1. The carbon dioxide source concentration difference power generation battery device consists of two types of acrylic plates, titanium electrodes, fluororubber gaskets and screws; according to Figure 2 The device is assembled in the order shown; the membrane material is then placed between two acrylic plates; finally, the device is fixed with screws and nuts to obtain a carbon dioxide source concentration difference power generation cell device; and the device is tested with deionized water to ensure that there is no leakage;

[0032] S2. 5 ml of 1,8-diazabicyclo[5.4.0]undec-7-ene and 2 ml of ethanolamine were sequentially added to 100 ml of water and mixed to obtain a carbon dioxide capture solution;

[0033] S3. Place the carbon dioxide capture solution and Fumasep's FKE-50 cation exchange membrane into a carbon dioxide source concentration difference power generation cell device, introduce a certain concentration of carbon dioxide to form a concentration difference, connect the circuit and connect an external ammeter to complete the circuit connection, set the ammeter bias to scan from -1V to +1V, and the voltage scan rate is 0.01V / s to obtain an IV curve;

[0034] S4. Change the current meter bias voltage to scan from -1V to +1V, and the voltage scanning rate is 0.01V / s to obtain the IV curve; perform linear fitting on the IV curve to obtain the slope, and the slope value is the solution resistance;

[0035] S5. When measuring the electrochemical impedance spectrum, a dual-electrode system is used to directly connect the assembled carbon dioxide source concentration difference power generation cell device to the electrochemical workstation for measurement;

[0036] Example 2: A carbon dioxide source concentration difference power generation battery system, the preparation method is as follows:

[0037] S1. The carbon dioxide source concentration difference power generation battery device consists of two types of acrylic plates, titanium electrodes, fluororubber gaskets and screws; according to Figure 2 The device is assembled in the order shown; the membrane material is then placed between two acrylic plates; finally, the device is fixed with screws and nuts to obtain a carbon dioxide source concentration difference power generation cell device; and the device is tested with deionized water to ensure that there is no leakage;

[0038] S2. 7 ml of 1,8-diazabicyclo[5.4.0]undec-7-ene and 3 ml of ethanolamine were sequentially added to 110 ml of water and mixed to obtain a carbon dioxide capture solution;

[0039] S3. Place the carbon dioxide capture solution and Fumasep's FKB-PK-130 cation exchange membrane into a carbon dioxide source concentration difference power generation cell device, introduce a certain concentration of carbon dioxide to form a concentration difference, connect the circuit and connect an external ammeter to complete the circuit connection, set the ammeter to apply a bias voltage from -1V to +1V, and the voltage scan rate is 0.01V / s to obtain an IV curve;

[0040] S4. Change the bias voltage applied by the ammeter to scan from -1V to +1V, with a voltage scanning rate of 0.01V / s, to obtain an IV curve; perform a linear fit on the IV curve to obtain the slope, which is the solution resistance;

[0041] S5. When measuring the electrochemical impedance spectrum, a dual-electrode system is used to directly connect the assembled carbon dioxide source concentration difference power generation cell device to the electrochemical workstation for measurement;

[0042] Example 3: A carbon dioxide source concentration difference power generation battery system, the preparation method is as follows:

[0043] S1. The carbon dioxide source concentration difference power generation battery device consists of two types of acrylic plates, titanium electrodes, fluororubber gaskets and screws; according to Figure 2The device is assembled in the order shown; the membrane material is then placed between two acrylic plates; finally, the device is fixed with screws and nuts to obtain a carbon dioxide source concentration difference power generation cell device; and the device is tested with deionized water to ensure that there is no leakage;

[0044] S2. 10 ml of 1,8-diazabicyclo[5.4.0]undec-7-ene and 5 ml of ethanolamine were successively added to 120 ml of water and mixed to obtain a carbon dioxide capture solution;

[0045] S3. Place the carbon dioxide capture solution and Fumasep's FS-990-PK cation exchange membrane into a carbon dioxide source concentration difference power generation cell device, introduce a certain concentration of carbon dioxide to form a concentration difference, connect the circuit and connect an external ammeter to complete the circuit connection, set the ammeter to apply a bias voltage from -1V to +1V, and the voltage scan rate is 0.01V / s to obtain an IV curve;

[0046] S4. Change the bias voltage applied by the ammeter to scan from -1V to +1V, with a voltage scanning rate of 0.01V / s, to obtain an IV curve; perform a linear fit on the IV curve to obtain the slope, which is the solution resistance;

[0047] S5. When measuring the electrochemical impedance spectrum, a dual-electrode system is used to directly connect the assembled carbon dioxide source concentration difference power generation cell device to the electrochemical workstation for measurement;

[0048] Example 4: A carbon dioxide source concentration difference power generation battery system, the preparation method is as follows:

[0049] S1. The carbon dioxide source concentration difference power generation battery device consists of two types of acrylic plates, titanium electrodes, fluororubber gaskets and screws; according to Figure 2 The device is assembled in the order shown; the membrane material is then placed between two acrylic plates; finally, the device is fixed with screws and nuts to obtain a carbon dioxide source concentration difference power generation cell device; and the device is tested with deionized water to ensure that there is no leakage;

[0050] S2. 5 ml of 1,5,7-triazabicyclo[4.4.0]dec-5-ene and 2 ml of 2-amino-2-methyl-1-propanol were sequentially added to 100 ml of water and mixed to obtain a carbon dioxide capture solution;

[0051] S3. Place the carbon dioxide capture solution and Fumasep's F-10120 cation exchange membrane into a carbon dioxide source concentration difference power generation cell device, introduce a certain concentration of carbon dioxide to form a concentration difference, connect the circuit and connect an external ammeter to complete the circuit connection, set the ammeter to apply a bias voltage from -1V to +1V, and the voltage scan rate is 0.01V / s to obtain an IV curve;

[0052] S4. Change the bias voltage applied by the ammeter to scan from -1V to +1V, with a voltage scanning rate of 0.01V / s, to obtain an IV curve; perform a linear fit on the IV curve to obtain the slope, which is the solution resistance;

[0053] S5. When measuring the electrochemical impedance spectrum, a dual-electrode system is used to directly connect the assembled carbon dioxide source concentration difference power generation cell device to the electrochemical workstation for measurement;

[0054] Example 5: A carbon dioxide source concentration difference power generation battery system, the preparation method is as follows:

[0055] S1. The carbon dioxide source concentration difference power generation battery device consists of two types of acrylic plates, titanium electrodes, fluororubber gaskets and screws; according to Figure 2 The device is assembled in the order shown; the membrane material is then placed between two acrylic plates; finally, the device is fixed with screws and nuts to obtain a carbon dioxide source concentration difference power generation cell device; and the device is tested with deionized water to ensure that there is no leakage;

[0056] S2. 6 ml of 1,5,7-triazabicyclo[4.4.0]dec-5-ene and 3 ml of 2-amino-2-methyl-1-propanol were sequentially added to 105 ml of water and mixed to obtain a carbon dioxide capture solution;

[0057] S3. Place the carbon dioxide capture solution and Dupont's N211 proton exchange membrane into a carbon dioxide source concentration difference power generation cell device, introduce a certain concentration of carbon dioxide to form a concentration difference, connect the circuit and connect an external ammeter to complete the circuit connection, set the ammeter to apply a bias voltage from -1V to +1V, and the voltage scan rate is 0.01V / s to obtain an IV curve;

[0058] S4. Change the bias voltage applied by the ammeter to scan from -1V to +1V, with a voltage scanning rate of 0.01V / s, to obtain an IV curve; perform a linear fit on the IV curve to obtain the slope, which is the solution resistance;

[0059] S5. When measuring the electrochemical impedance spectrum, a dual-electrode system is used to directly connect the assembled carbon dioxide source concentration difference power generation cell device to the electrochemical workstation for measurement;

[0060] Example 6: A carbon dioxide source concentration difference power generation battery system, the preparation method is as follows:

[0061] S1. The carbon dioxide source concentration difference power generation battery device consists of two types of acrylic plates, titanium electrodes, fluororubber gaskets and screws; according to Figure 2The device is assembled in the order shown; the membrane material is then placed between two acrylic plates; finally, the device is fixed with screws and nuts to obtain a carbon dioxide source concentration difference power generation cell device; and the device is tested with deionized water to ensure that there is no leakage;

[0062] S2. 8 mol of 1,5,7-triazabicyclo[4.4.0]dec-5-ene and 4 ml of 2-amino-2-methyl-1-propanol were sequentially added to 110 ml of water and mixed to obtain a carbon dioxide capture solution;

[0063] S3. Place the carbon dioxide capture solution and Dupont's N115 proton exchange membrane into a carbon dioxide source concentration difference power generation cell device, introduce a certain concentration of carbon dioxide to form a concentration difference, connect the circuit and connect an external ammeter to complete the circuit connection, set the ammeter to apply a bias voltage from -1V to +1V, and the voltage scan rate is 0.01V / s to obtain an IV curve;

[0064] S4. Change the bias voltage applied by the ammeter to scan from -1V to +1V, with a voltage scanning rate of 0.01V / s, to obtain an IV curve; perform a linear fit on the IV curve to obtain the slope, which is the solution resistance;

[0065] S5. When measuring the electrochemical impedance spectrum, a dual-electrode system is used to directly connect the assembled carbon dioxide source concentration difference power generation cell device to the electrochemical workstation for measurement;

[0066] Example 7: A carbon dioxide source concentration difference power generation battery system, the preparation method is as follows:

[0067] S1. The carbon dioxide source concentration difference power generation battery device consists of two types of acrylic plates, titanium electrodes, fluororubber gaskets and screws; according to Figure 2 The device is assembled in the order shown; the membrane material is then placed between two acrylic plates; finally, the device is fixed with screws and nuts to obtain a carbon dioxide source concentration difference power generation cell device; and the device is tested with deionized water to ensure that there is no leakage;

[0068] S2. 10 ml of 1,5,7-triazabicyclo[4.4.0]dec-5-ene and 5 ml of 2-amino-2-methyl-1-propanol were sequentially added to 120 ml of water and mixed to obtain a carbon dioxide capture solution;

[0069] S3. Place the carbon dioxide capture solution and Dupont's N117 proton exchange membrane into a carbon dioxide source concentration difference power generation cell device, introduce a certain concentration of carbon dioxide to form a concentration difference, connect the circuit and connect an external ammeter to complete the circuit connection, set the ammeter to apply a bias voltage from -1V to +1V, and the voltage scan rate is 0.01V / s to obtain an IV curve;

[0070] S4. Change the bias voltage applied by the ammeter to scan from -1V to +1V, with a voltage scanning rate of 0.01V / s, to obtain an IV curve; perform a linear fit on the IV curve to obtain the slope, which is the solution resistance;

[0071] S5. When measuring the electrochemical impedance spectrum, a dual-electrode system is used to directly connect the assembled carbon dioxide source concentration difference power generation cell device to the electrochemical workstation for measurement;

[0072] Performance Testing:

[0073] The output power density measured when adding 2 mol of lithium nitrate, sodium nitrate, and potassium nitrate respectively is as follows Figure 5 As shown; the output power density of adding 0.1mol, 0.5mol, 1mol, and 2mol of potassium nitrate is measured as follows Figure 6 As shown; the output power density is calculated by the following formula:

[0074]

[0075] Where P is the output power density, V is the open circuit voltage, I is the short-circuit current, and A is the effective membrane area of ​​the device;

[0076] The conductivity results when 2 mol of lithium nitrate, sodium nitrate, and potassium nitrate were added were as follows: Figure 3 Shown

[0077] Find the equivalent circuit IV curve when V = 0 and obtain I SC , find the equivalent circuit when I = 0 and get V OC , add 2 mol of lithium nitrate, sodium nitrate and potassium nitrate respectively under V OC like Figure 4 As shown;

[0078] The electrochemical impedance spectra of potassium nitrate with 0.1 mol, 0.5 mol, 1 mol, and 2 mol added are shown in Figure 2. Figure 7 shown.

[0079] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0080] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A carbon dioxide source concentration difference power generation battery system, characterized in that: The battery system includes the following parts: a carbon dioxide capture solution, electrolyte ions, an ion exchange membrane, electrodes and a circuit; The carbon dioxide capture solution is prepared from water, tertiary amine and primary amine.

2. The carbon dioxide source concentration difference power generation battery system according to claim 1, characterized in that: The preparation method of the carbon dioxide capture solution is as follows: The tertiary amine and the primary amine are sequentially added into water and mixed evenly to obtain a carbon dioxide capture solution.

3. The carbon dioxide source concentration difference power generation battery system according to claim 2, characterized in that: The tertiary amine is any one of 1,8-diazabicyclo[5.4.0]undec-7-ene and 1,5,7-triazabicyclo[4.4.0]dec-5-ene.

4. The carbon dioxide source concentration difference power generation battery system according to claim 2, characterized in that: The primary amine is any one of ethanolamine and 2-amino-2-methyl-1-propanol.

5. The carbon dioxide source concentration difference power generation battery system according to claim 2, characterized in that: The volume ratio of the tertiary amine, the primary amine and water is 5-10:2-5:100-120.

6. The carbon dioxide source concentration difference power generation battery system according to claim 1, characterized in that: The electrolyte ion is any one of potassium phosphate, potassium sulfate, potassium nitrate, lithium nitrate and sodium nitrate.

7. The carbon dioxide source concentration difference power generation battery system according to claim 1, characterized in that: The ion exchange membrane is any one of Fumasep's FKE-50 cation exchange membrane, Fumasep's FKB-PK-130 cation exchange membrane, Fumasep's FS-990-PK cation exchange membrane, Fumasep's F-10120 cation exchange membrane, Dupont's N211 proton exchange membrane, Dupont's N115 proton exchange membrane, and Dupont's N117 proton exchange membrane.

8. The carbon dioxide source concentration difference power generation battery system according to claim 1, characterized in that: The electrode is any one of a titanium electrode, a copper electrode, a silver electrode, a platinum electrode, a graphite electrode, and a carbon nanotube electrode.

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