A non-lithium aqueous alkaline dual-ion battery

Abstract

The present application relates to the technical field of aqueous energy storage battery, and particularly relates to a non-lithium aqueous alkaline dual-ion battery. The present application realizes the embedding and de-embedding reaction of sodium ions / potassium ions in aqueous solution by selecting a suitable negative electrode material with sodium embedding or lithium embedding sites; the alkaline electrolyte system can effectively reduce the hydrogen evolution site and inhibit the hydrogen evolution reaction in the aqueous battery; at the same time, the principle of "asymmetric electrode polarization" of the positive and negative electrode regulation mechanism can make the positive electrode charging cutoff potential always stable below the oxygen evolution potential, thereby effectively inhibiting the oxygen evolution reaction in the aqueous battery. And then the coulombic efficiency and energy efficiency of the battery are improved, and safe, low-cost and high-efficiency electrical energy storage is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aqueous energy storage batteries, in particular to a non-lithium aqueous alkaline dual-ion battery. BACKGROUND

[0002] The growing energy demand and the increasingly serious environmental problems have accelerated the pace of exploration of new energy. The research and application of clean energy have also developed rapidly in the past few decades. As the terminal energy consumption, the proportion of electric energy will steadily increase, and the integration of renewable energy and power grid will be further developed. Energy storage technology will play a crucial role in the stable operation of power grid and the high-quality and efficient utilization of renewable electric energy.

[0003] Lead-acid batteries are the most widely used battery technology in current grid energy storage, with the characteristics of low cost and high safety. However, heavy metal lead is a potential high-risk environmental pollutant, and its recovery or improper recovery will cause environmental pollution and ecological damage. Lithium-ion batteries based on organic electrolyte are not suitable for large-scale grid energy storage due to high cost and poor safety. How to use cheap and non-polluting materials to achieve high-efficiency electric energy storage is the difficulty and bottleneck of aqueous energy storage batteries.

[0004] Therefore, the development of a new type of aqueous energy storage battery with low cost, high efficiency and environmental friendliness is expected to overturn the existing technology and stand out in the grid energy storage technology, and occupy a place in the trillion-level energy storage market. In recent years, dual-ion batteries have attracted much attention due to their low cost, high operating voltage and energy density. The existing technology (Li H, Kurihara T, Yang D, Watanabe M, Ishihara T. A novel aqueous dual-ion battery using concentrated bisalt electrolyte. Energy Stor. Mater. 2021, 38, 454-461; Liu J, Wang J, Ku Z, Wang H, Chen S, Zhang L, Lin J, Shen Z X. Aqueous Rechargeable Alkaline Co x Ni 2-xA lithium-ion alkaline aqueous dual-ion energy storage strategy is disclosed in S2 / TiO2Battery.ACS nano, 2016, 10(1):1007-1016., which has high operating voltage and energy density. However, due to the high cost of lithium ions and the limited availability of raw materials, it still cannot meet the requirements of large-scale energy storage technology. To address these issues, sodium and potassium ions are expected to become alternatives to lithium ions because they are cheaper and more widely available than lithium ions. However, sodium and potassium ions have larger radii than lithium ions. Compared to lithium ion intercalation, the active sites and diffusion channels of electrode materials used for sodium and potassium ions are significantly reduced (Qian J, Wu C, Cao Y, Ma Z, Huang Y, Ai X, Yang H. Prussian Blue Cathode Materials for Sodium-Ion Batteries and Other Ion Batteries. Adv. Energy Mater. 2018, 8, 1702619; Su D, McDonald A, Qiao SZ, Wang G. High-Capacity Aqueous Potassium-Ion Batteries for Large-Scale Energy Storage. Adv. Mater. 2017, 29, 1604007). Furthermore, compared to the lithium intercalation potential, sodium / potassium intercalation sites are more negative, even lower than the hydrogen evolution potential. Therefore, hydrogen evolution reactions are more likely to occur, making sodium or potassium intercalation impossible, thus making it more difficult to achieve sodium / potassium ion intercalation and deintercalation in aqueous batteries. Summary of the Invention

[0005] The purpose of this invention is to provide a non-lithium aqueous alkaline dual-ion battery, which is safe, low in cost, and capable of high-efficiency energy storage.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0007] This invention provides a non-lithium aqueous alkaline dual-ion battery, comprising a positive electrode, a negative electrode, and an alkaline electrolyte;

[0008] The positive electrode includes a positive electrode current collector and a positive electrode material disposed on the surface of the positive electrode current collector;

[0009] The negative electrode includes a negative electrode current collector and a negative electrode material disposed on the surface of the negative electrode current collector;

[0010] The cathode material includes one or more of the following: hydrotalcite-like materials, hydrotalcite-carbon composite materials, and nickel-based materials;

[0011] The negative electrode material includes NaTi2(PO4)3, NaTi2(PO4)3 doped compounds, poly(1,5-diaminoanthraquinone), or composite materials containing NaTi2(PO4)3.

[0012] The alkaline electrolyte includes an alkaline aqueous solution containing sodium ions or an alkaline aqueous solution containing potassium ions.

[0013] Preferably, the mass ratio of the positive electrode material to the negative electrode material is (0.5-3):1.

[0014] Preferably, the hydrotalcite-like material or the hydrotalcite-carbon composite material independently comprises NiFe-LDH and / or CoFe-LDH;

[0015] The carbon material in the hydrotalcite-carbon composite material includes one or more of carbon nanotubes, graphite, and graphene;

[0016] The nickel-based materials include Ni3S2, Ni(OH)2, and Ni X One or more of P, Ni3Se2 and Ni3N, wherein 0≤X≤1.0.

[0017] Preferably, the positive electrode material has a layered sheet structure; the specific surface area of ​​the positive electrode material is 40-100 m². 2 / g.

[0018] Preferably, the loading of the positive electrode material in the positive electrode current collector is 1–5 mg / cm³. 2 The load thickness is 20–200 μm.

[0019] Preferably, the NaTi2(PO4)3 doped compound includes cation-doped NaTi2(PO4)3 and / or anion-doped NaTi2(PO4)3;

[0020] The composite material containing NaTi2(PO4)3 includes carbon-coated NaTi2(PO4)3 and / or conductive polymer-coated NaTi2(PO4)3.

[0021] Preferably, the negative electrode material has a cubic or layered morphology; the surface area of ​​the negative electrode material is 20–200 m². 2 / g.

[0022] Preferably, the loading of the negative electrode material in the negative electrode current collector is 1–5 mg / cm³. 2 The load thickness is 20–200 μm.

[0023] Preferably, the concentration of the alkaline aqueous solution containing sodium ions or the alkaline aqueous solution containing potassium ions is independently 0.5 to 9 mol / L.

[0024] Preferably, the alkaline aqueous solution containing sodium ions includes an aqueous solution of sodium hydroxide or an aqueous solution of a strong base and a weak acid salt of sodium.

[0025] The potassium-containing alkaline aqueous solution includes potassium hydroxide aqueous solution or potassium strong base weak acid salt aqueous solution.

[0026] This invention provides a non-lithium aqueous alkaline dual-ion battery, comprising a positive electrode, a negative electrode, and an alkaline electrolyte; the positive electrode comprises a positive current collector and a positive electrode material disposed on the surface of the positive current collector; the negative electrode comprises a negative current collector and a negative electrode material disposed on the surface of the negative current collector; the positive electrode material comprises one or more of a hydrotalcite-like material, a hydrotalcite-carbon composite material, and a nickel-based material; the negative electrode material comprises NaTi2(PO4)3, a NaTi2(PO4)3 doped compound, poly(1,5-diaminoanthraquinone), or a composite material containing NaTi2(PO4)3; the alkaline electrolyte comprises an alkaline aqueous solution containing sodium ions or an alkaline aqueous solution containing potassium ions. This invention achieves the intercalation-deintercalation reaction of sodium / potassium ions in aqueous solution by selecting a negative electrode material with suitable sodium or lithium intercalation sites. The alkaline electrolyte system effectively lowers the hydrogen evolution site, suppressing the hydrogen evolution reaction in aqueous batteries. Simultaneously, the "asymmetric electrode polarization" principle, a mechanism for controlling the positive and negative electrodes, ensures that the positive electrode charging cutoff potential remains stable below the oxygen evolution potential, thereby effectively suppressing the oxygen evolution reaction in aqueous batteries. This improves the coulombic efficiency and energy efficiency of the battery, achieving safe, low-cost, and high-efficiency energy storage.

[0027] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0028] 1) This invention uses an alkaline solution as the electrolyte and proposes a method based on Na... + / K + and OH - The water-based alkaline rechargeable dual-ion battery with an intercalation / deintercalation mechanism features simple device design, high safety, low cost, and environmental friendliness, providing a new technology for grid energy storage.

[0029] 2) This invention employs a highly reversible dual insertion / deintercalation reaction, which can effectively reduce polarization loss and enable large-scale, high-efficiency energy storage.

[0030] 3) This invention matches suitable positive and negative electrode materials. Based on the principle of "asymmetric polarization of positive and negative electrodes", when the battery charging voltage rises, the negative electrode polarizes rapidly while the positive electrode polarization is not obvious. This method can keep the positive electrode potential at a relatively stable value, thereby suppressing the oxygen evolution reaction of the positive electrode and obtaining high coulombic efficiency. Attached Figure Description

[0031] Figure 1The CV curve and the first charge-discharge specific capacity curve of the non-lithium aqueous alkaline dual-ion battery described in Example 1 are shown.

[0032] Figure 2 The CV curve and the first charge-discharge specific capacity curve of the non-lithium aqueous alkaline dual-ion battery described in Example 2 are shown.

[0033] Figure 3 The CV curve and the first charge-discharge specific capacity curve of the non-lithium aqueous alkaline dual-ion battery described in Example 3 are shown.

[0034] Figure 4 The CV curve and first-cycle charge-discharge specific capacity curve of the non-lithium aqueous alkaline dual-ion battery described in Example 4 are shown.

[0035] Figure 5 The CV diagram and the first charge-discharge specific capacity diagram of the non-lithium aqueous alkaline dual-ion battery described in Comparative Example 1 are shown.

[0036] Figure 6 The CV curve and the first charge-discharge specific capacity curve of the non-lithium aqueous alkaline dual-ion battery described in Comparative Example 2 are shown. Detailed Implementation

[0037] This invention provides a non-lithium aqueous alkaline dual-ion battery, comprising a positive electrode, a negative electrode, and an alkaline electrolyte;

[0038] The positive electrode includes a positive electrode current collector and a positive electrode material disposed on the surface of the positive electrode current collector;

[0039] The negative electrode includes a negative electrode current collector and a negative electrode material disposed on the surface of the negative electrode current collector;

[0040] The cathode material includes one or more of the following: hydrotalcite-like materials, hydrotalcite-carbon composite materials, and nickel-based materials;

[0041] The negative electrode material includes NaTi2(PO4)3, NaTi2(PO4)3 doped compounds, poly(1,5-diaminoanthraquinone), or composite materials containing NaTi2(PO4)3.

[0042] The alkaline electrolyte includes an alkaline aqueous solution containing sodium ions or an alkaline aqueous solution containing potassium ions.

[0043] This invention does not impose any special limitations on the positive electrode current collector; any positive electrode current collector well-known to those skilled in the art can be used. In a specific embodiment of this invention, the positive electrode current collector is nickel foam.

[0044] In this invention, the preferred method of setting is coating or growth; this invention does not impose any special limitations on the coating and growth process, and any process well known to those skilled in the art can be used.

[0045] In this invention, the positive electrode material includes one or more of the following: a hydrotalcite-like material, a hydrotalcite-carbon composite material, and a nickel-based material; the hydrotalcite-like material or the hydrotalcite-carbon composite material preferably includes NiFe-LDH and / or CoFe-LDH; the carbon material in the hydrotalcite-carbon composite material preferably includes one or more of carbon nanotubes, graphite, and graphene; the hydrotalcite-carbon composite material preferably refers to "Gunjakar JL, Kim IY, Lee JM, Lee NS, Hwang SJ. Self-assembly of layered double hydroxide 2D nanoplates with graphene nanosheets: an effective way to improve the photocatalytic activity of 2D nanostructured materials for visible light-induced O2 generation. Energy Environ. Sci., 2013, 6, 1008–1017; Gong M, Li Y, Wang H, Liang Y, Wu JZ, Zhou J, Wang J, Regier T, Wei F, Dai H. An advanced Ni-Fe layered double hydroxide electrocatalyst for water oxidation. J. Am. Chem. Soc. 2013, 135, 8452-8455; Liu X, Li S, Akinwolemiwa B, Hu D, Wu T, Peng C. Low-crystalline transition metal oxide / hydroxide on MWCNT by Fenton-reaction-inspired green synthesis for lithium ion battery and OER electrocatalysis. Electrochim. Acta, 2021, 387, 138559”; The nickel-based material preferably includes Ni3S2, Ni(OH)2, Ni X One or more of P, Ni3Se2 and Ni3N, wherein 0≤X≤1.0; when the cathode material is two or more of the above-mentioned specific selections, the present invention does not have any special limitation on the ratio of the above-mentioned specific substances, and they can be mixed in any ratio.

[0046] In this invention, the positive electrode material is preferably a layered sheet structure; the specific surface area of ​​the positive electrode material is preferably 40-100 m². 2 / g. The loading of the positive electrode material in the positive electrode current collector is preferably 1-5 mg / cm³. 2 More preferably 2-4 mg / cm³ 2 The optimal value is 2.5–3.5 mg / cm³. 2 The preferred load thickness is 20–200 μm, more preferably 50–180 μm, and most preferably 100–150 μm.

[0047] In this invention, the negative electrode includes a negative electrode current collector and a negative electrode material coated on the surface of the negative electrode current collector; the negative electrode material includes NaTi2(PO4)3, NaTi2(PO4)3 doped compound, poly(1,5-diaminoanthraquinone) or a composite material containing NaTi2(PO4)3.

[0048] This invention does not impose any special limitations on the negative electrode current collector; any negative electrode current collector well-known to those skilled in the art can be used. In a specific embodiment of this invention, the negative electrode current collector is carbon cloth.

[0049] In this invention, the NaTi2(PO4)3 doped compound preferably includes cation-doped NaTi2(PO4)3 and / or anion-doped NaTi2(PO4)3; the cation-doped NaTi2(PO4)3 is preferably NaMnTi(PO4)3; the anion-doped NaTi2(PO4)3 is preferably Na 1+X Ti2(PO4) 3-X (SiO4) X Wherein, 0 ≤ X ≤ 1.0; the NaTi2(PO4)3-containing composite material includes carbon-coated NaTi2(PO4)3 and / or conductive polymer-coated NaTi2(PO4)3; the conductive polymer in the conductive polymer-coated NaTi2(PO4)3 is preferably PEDOT. In this invention, the negative electrode material is preferably cubic or layered; the surface area of ​​the negative electrode material is preferably 20–100 m². 2 / g. The loading of the negative electrode material in the negative electrode current collector is preferably 1-5 mg / cm³. 2 More preferably 2-4 mg / cm³ 2 The optimal value is 2.5–3.5 mg / cm³. 2 The preferred load thickness is 20–200 μm, more preferably 50–180 μm, and most preferably 100–150 μm.

[0050] In this invention, the mass ratio of the positive electrode material to the negative electrode material is preferably (0.5-3):1, more preferably (1.0-2.5):1, and even more preferably (1.5-2.0):1.

[0051] In this invention, the concentration of the alkaline aqueous solution containing sodium ions or the alkaline aqueous solution containing potassium ions is preferably 0.5 to 9 mol / L, more preferably 3 to 8 mol / L, and most preferably 5 to 6 mol / L.

[0052] In this invention, the alkaline aqueous solution containing sodium ions preferably includes an aqueous solution of sodium hydroxide or an aqueous solution of a strong base weak acid salt of sodium; the strong base weak acid salt of sodium in the aqueous solution of a strong base weak acid salt of sodium preferably includes sodium carbonate and / or sodium dihydrogen phosphate; the alkaline aqueous solution containing potassium ions preferably includes an aqueous solution of potassium hydroxide or an aqueous solution of a strong base weak acid salt of potassium; the strong base weak acid salt of potassium in the aqueous solution of a strong base weak acid salt of potassium preferably includes potassium carbonate and / or potassium dihydrogen phosphate.

[0053] The present invention does not impose any special limitations on the preparation process of the non-lithium aqueous alkaline dual-ion battery, and any process known to those skilled in the art can be used.

[0054] The non-lithium aqueous alkaline dual-ion battery provided by the present invention will be described in detail below with reference to the embodiments, but these should not be construed as limiting the scope of protection of the present invention.

[0055] Example 1

[0056] Positive electrode: The positive electrode current collector is nickel foam, and the positive electrode material is NiFe-LDH (loading of 2.4 mg / cm³). 2 The load thickness is 100μm, and the specific surface area is 66m². 2 / g);

[0057] Negative electrode: The negative electrode current collector is carbon cloth, and the negative electrode material is NaTi2(PO4)3(NTP) (loading is 2.64 mg / cm³). 2 The load thickness is 120μm, and the specific surface area is 85m². 2 / g);

[0058] Electrolyte: 6 mol / L sodium hydroxide solution;

[0059] The non-lithium aqueous alkaline dual-ion battery has an operating voltage of 0.5–1.45V, a current density of 1A / g, an average coulombic efficiency of 98%, and an average energy efficiency of 78%.

[0060] Figure 1 The CV diagram (a) and the first charge-discharge specific capacity diagram (b, GCD diagram) of the non-lithium aqueous alkaline dual-ion battery are shown below. Figure 1It can be seen that the non-lithium aqueous alkaline dual-ion battery has strong reversibility and can carry out stable sodium ion and hydroxide ion insertion and extraction reactions; the first charge-discharge specific capacity diagram has a clear and stable charge-discharge plateau, indicating that the battery system has small polarization loss and high coulombic efficiency and energy efficiency.

[0061] Example 2

[0062] Positive electrode: The positive electrode current collector is nickel foam, and the positive electrode material is Ni3S2 (loading is 1.5 mg / cm³). 2 );

[0063] Negative electrode: The negative electrode current collector is carbon cloth, and the negative electrode material is NaTi2(PO4)3(NTP) (loading is 3 mg / cm³). 2 The load thickness is 120μm, and the specific surface area is 85m². 2 / g);

[0064] Electrolyte: 3 mol / L sodium hydroxide solution;

[0065] The non-lithium aqueous alkaline dual-ion battery has an operating voltage of 0.4–1.4V, a current density of 1A / g, an average coulombic efficiency of 98%, and an average energy efficiency of 80%.

[0066] Figure 2 The CV diagram (a) and the first charge-discharge specific capacity diagram (b, GCD diagram) of the non-lithium aqueous alkaline dual-ion battery are shown below. Figure 2 It can be seen that the non-lithium aqueous alkaline dual-ion battery has strong reversibility and can carry out stable sodium ion and hydroxide ion insertion and extraction reactions; the first charge-discharge specific capacity diagram has a clear and stable charge-discharge plateau, indicating that the battery system has small polarization loss and high coulombic efficiency and energy efficiency.

[0067] Example 3

[0068] Positive electrode: The positive electrode current collector is nickel foam, and the positive electrode material is NiFe-LDH@CNT (with a loading of 2.58 mg / cm³). 2 The load thickness is 100μm, and the specific surface area is 85m². 2 / g);

[0069] Negative electrode: The negative electrode current collector is carbon cloth, and the negative electrode material is NaTi2(PO4)3(NTP) coated with 0.8 mg PEDOT (loading: 3.18 mg / cm³). 2 The load thickness is 120μm, and the specific surface area is 85m². 2 / g);

[0070] Electrolyte: 6 mol / L sodium hydroxide solution;

[0071] The non-lithium aqueous alkaline dual-ion battery has an operating voltage of 0.4–1.4V, a current density of 1A / g, a first-cycle coulombic efficiency of 92%, an average coulombic efficiency of 98%, and an average energy efficiency of 78%.

[0072] Figure 3 The CV diagram (a) and the first charge-discharge specific capacity diagram (b, GCD diagram) of the non-lithium aqueous alkaline dual-ion battery are shown below. Figure 3 It is known that the non-lithium aqueous alkaline dual-ion battery has strong reversibility and can stably generate Na+ cations. + and anion OH - The insertion and extraction reactions; the first-cycle charge-discharge specific capacity plot shows a clear and stable charge-discharge plateau and a high discharge capacity, indicating that the battery system has small polarization loss and high coulombic efficiency and energy efficiency.

[0073] Example 4

[0074] Positive electrode: The positive electrode current collector is nickel foam, and the positive electrode material is Ni3S2 (loading is 0.4 mg / cm³). 2 );

[0075] Negative electrode: The negative electrode current collector is carbon cloth, and the negative electrode material is poly(1,5-diaminoanthraquinone) (PDAQ) with a loading of 0.6 mg / cm³. 2 );

[0076] Electrolyte: 6 mol / L sodium hydroxide solution;

[0077] The non-lithium aqueous alkaline dual-ion battery has an operating voltage of 0.4–1.4V, a current density of 1A / g, an average coulombic efficiency of 94%, and an average energy efficiency of 39%.

[0078] Figure 4 The CV diagram (a) and the first charge-discharge specific capacity diagram (b, GCD diagram) of the non-lithium aqueous alkaline dual-ion battery are shown below. Figure 4 It can be seen that the non-lithium aqueous alkaline dual-ion battery can perform cationic Na+ reaction. + and anion OH - The insertion and extraction reactions; the first charge-discharge specific capacity diagram shows that, due to the binding of Na by PDAQ... + The dissolution of intermediate products during this process leads to certain polarization losses and energy efficiency losses in the battery system.

[0079] Comparative Example 1

[0080] Positive electrode: The positive electrode current collector is nickel foam, and the positive electrode material is NiFe-LDH (loading of 3 mg / cm³). 2 );

[0081] Negative electrode: The negative electrode current collector is carbon cloth, and the negative electrode material is TiS2 (loading of 1.8 mg / cm³). 2 );

[0082] Electrolyte: 6 mol / L sodium hydroxide solution;

[0083] The non-lithium aqueous alkaline dual-ion battery has an operating voltage of 0.4–1.65V, a current density of 1A / g, an average coulombic efficiency of 35%, and an average energy efficiency of 19%.

[0084] Figure 5 The CV diagram (a) and the first charge-discharge specific capacity diagram (b, GCD diagram) of the non-lithium aqueous alkaline dual-ion battery are shown below. Figure 5 It can be seen that the non-lithium aqueous alkaline dual-ion battery can perform cationic Na+ reaction. + and anion OH - The insertion and extraction reactions; the first charge-discharge specific capacity diagram shows that, due to the relatively negative cation insertion sites of TiS2, the battery system has a certain polarization loss.

[0085] Comparative Example 2

[0086] Positive electrode: The positive electrode current collector is nickel foam, and the positive electrode material is NiFe-LDH (loading of 2.1 mg / cm³). 2 );

[0087] Negative electrode: The negative electrode current collector is carbon cloth, and the negative electrode material is TiS2 (loading of 1.5 mg / cm³). 2 );

[0088] Electrolyte: 6 mol / L sodium hydroxide solution;

[0089] The non-lithium aqueous alkaline dual-ion battery has an operating voltage of 0.4–1.5V, a current density of 1A / g, an average coulombic efficiency of 40%, and an average energy efficiency of 22%.

[0090] Figure 6 The CV diagram (a) and the first charge-discharge specific capacity diagram (b, GCD diagram) of the non-lithium aqueous alkaline dual-ion battery are shown below. Figure 6 It can be seen that the non-lithium aqueous alkaline dual-ion battery can perform cationic Na+ reaction. + and anion OH - The insertion and extraction reactions; the first charge-discharge specific capacity diagram shows that, due to the relatively negative cation insertion sites of TiS2, the battery system has a certain polarization loss.

[0091] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A non-lithium aqueous alkaline dual-ion battery, characterized in that, Includes the positive electrode, negative electrode, and alkaline electrolyte; The positive electrode includes a positive electrode current collector and a positive electrode material disposed on the surface of the positive electrode current collector; The negative electrode includes a negative electrode current collector and a negative electrode material disposed on the surface of the negative electrode current collector; The cathode material is Ni3S2; The negative electrode material is poly(1,5-diaminoanthraquinone); The alkaline electrolyte is an aqueous solution of sodium hydroxide.

2. The non-lithium aqueous alkaline dual-ion battery as described in claim 1, characterized in that, The mass ratio of the positive electrode material to the negative electrode material is (0.5~3):

1.

3. The non-lithium aqueous alkaline dual-ion battery as described in claim 1 or 2, characterized in that, The positive electrode material has a layered sheet structure; the specific surface area of ​​the positive electrode material is 40~100m². 2 / g.

4. The non-lithium aqueous alkaline dual-ion battery as described in claim 3, characterized in that, The loading of the positive electrode material in the positive electrode current collector is 1~5 mg / cm³. 2 The load thickness is 20~200μm.

5. The non-lithium aqueous alkaline dual-ion battery as described in claim 1, characterized in that, The specific surface area of ​​the negative electrode material is 20~200m². 2 / g.

6. The non-lithium aqueous alkaline dual-ion battery as described in claim 5, characterized in that, The loading of the negative electrode material in the negative electrode current collector is 1~5 mg / cm³. 2 The load thickness is 20~200μm.

7. The non-lithium aqueous alkaline dual-ion battery as described in claim 1, characterized in that, The concentration of the sodium hydroxide aqueous solution is 0.5~9 mol / L.

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