A new solid-state battery based on lunar soil components and its preparation method

Abstract

The present invention provides a new solid-state battery based on lunar soil components and a preparation method thereof. The battery includes a metal negative electrode, a solid electrolyte and a positive electrode material. The solid electrolyte is arranged between the metal negative electrode and the positive electrode material, wherein the metal negative electrode is aluminum (Al), the solid electrolyte is aluminum oxide (Al2O3), and the positive electrode material is amorphous titanium dioxide (TiO2). Compared with lithium batteries brought from Earth, the present invention realizes the in-situ utilization of extraterrestrial resources and greatly reduces the production cost of the battery. Its preparation process is simple and effectively improves the safety performance of the battery. The battery has good working ability, and because the content of lunar soil on the moon is quite large, there is no need to worry about insufficient reserves. This method has good application prospects and can provide a reliable energy solution for long-term residence on the moon in the future.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a new solid-state battery based on lunar soil components and a preparation method thereof. Background Art

[0002] As the earth's resources become increasingly depleted and environmental pressures continue to increase, scientists are actively exploring and developing new living spaces for human use.

[0003] The moon has attracted widespread attention due to its unique geological structure and environmental conditions. In order to achieve long-term habitation on the moon in the future, efficient energy storage devices will be an essential key factor.

[0004] However, bringing Earth's most sophisticated lithium-ion batteries to the moon faces numerous challenges. Not only is it expensive, but the organic electrolytes used in lithium-ion batteries also pose a series of safety risks, which could be exacerbated in the unique lunar environment. Consequently, lithium-ion batteries are unable to meet the requirements for a long-term, effective energy supply on the moon.

[0005] Therefore, scientists must find new energy storage solutions suitable for the lunar environment to ensure safe, stable, and sustainable lunar habitation. This exploration is not only crucial for lunar migration but will also promote the advancement of energy storage technology for the benefit of all mankind.

[0006] In fact, the lunar soil on the surface of the moon contains rich material resources, such as helium-3, rare earth elements and various compounds. These resources may have a profound impact on human energy and material supply in the future.

[0007] Currently, most research on lunar soil focuses on the synthesis and analysis of lunar soil analogs, with little research on using lunar soil analogs to create energy storage devices. Due to technological limitations, it is currently impossible to use the existing lunar soil resources on the moon to create batteries that can be used by humans. Summary of the Invention

[0008] The embodiments of the present invention provide a new solid-state battery based on lunar soil components and a preparation method thereof to solve the above-mentioned technical problems in the prior art.

[0009] To overcome the shortcomings of existing technologies, this paper proposes a novel solid-state battery manufacturing method based on an in-depth analysis of lunar soil composition. This method leverages the abundant resources of lunar soil, achieving in-situ utilization of extraterrestrial resources. Compared to traditional lithium batteries using organic electrolytes, this new solid-state battery offers significant improvements in safety.

[0010] This innovation will not only enable scientists to more efficiently utilize lunar resources and reduce the consumption of Earth's resources, but also improve the efficiency and safety of lunar energy supply. This breakthrough will provide reliable energy support for future long-term lunar habitation, while also promoting the development of energy storage technology, which is of great significance to human exploration and utilization of extraterrestrial resources.

[0011] According to the first aspect, an embodiment of the present invention provides a new solid-state battery, which includes a metal negative electrode, a solid electrolyte and a positive electrode material, wherein the solid electrolyte is arranged between the metal negative electrode and the positive electrode material, wherein the metal negative electrode is aluminum (Al), the solid electrolyte is aluminum oxide (Al2O3), and the positive electrode material is amorphous titanium dioxide (TiO2).

[0012] Preferably, the positive electrode material is disposed on a positive electrode current collector, and the positive electrode current collector is titanium (Ti).

[0013] Preferably, the solid electrolyte is an Al2O3 thin film formed on the surface of the metal negative electrode material, or the solid electrolyte is an Al2O3 thin disc formed by extrusion of a mold;

[0014] Preferably, the Al2O3 film has a thickness of micrometer level.

[0015] Preferably, the method for preparing the Al2O3 film comprises the following steps: preparing an aluminum sheet, and calcining the aluminum sheet in air to form the Al2O3 film on the surface of the aluminum sheet;

[0016] Preferably, the calcination temperature is 300-500° C. and the calcination time is more than 2 hours.

[0017] Preferably, the Al2O3 thin disc is an Al2O3 thin disc formed by extruding Al2O3 powder through a die.

[0018] Preferably, the Al 2 O 3 thin film is formed on only one of the two surfaces of the aluminum sheet along the thickness direction.

[0019] The present invention also provides a method for preparing a novel solid-state battery, the battery comprising a metal negative electrode, a solid electrolyte and a positive electrode material, wherein the solid electrolyte is disposed between the metal negative electrode and the positive electrode material, wherein the metal negative electrode is aluminum (Al), the solid electrolyte is aluminum oxide (Al2O3), and the positive electrode material is amorphous titanium dioxide (TiO2), and the method comprises the following steps:

[0020] preparing an aluminum sheet, and calcining the aluminum sheet in air to form the Al2O3 film on the surface of the aluminum sheet;

[0021] preparing amorphous titanium dioxide powder;

[0022] The obtained amorphous titanium dioxide powder is extruded into a thin disc through a die, the side of the aluminum sheet with the Al2O3 film formed thereon is aligned with the thin disc, and a titanium current collector is placed on the other side of the thin disc;

[0023] or

[0024] The method comprises the following steps:

[0025] Prepare aluminum sheets and extrude Al2O3 powder through a die to form Al2O3 thin discs;

[0026] Amorphous titanium dioxide, conductive agent, and PVDF were ground and then added into NMP to form a slurry, which was evenly coated on the titanium current collector. The obtained electrode was used as the positive electrode;

[0027] One side of the Al2O3 thin disc serving as the electrolyte is aligned with the aluminum sheet, and the positive electrode sheet is placed on the other side.

[0028] Preferably, the positive electrode current collector is titanium (Ti).

[0029] Preferably, the Al2O3 film has a thickness of micrometer level.

[0030] Preferably, the calcination temperature is 300-500° C. and the calcination time is more than 2 hours.

[0031] Preferably, the preparation of amorphous titanium dioxide powder comprises the following steps:

[0032] Polyvinylpyrrolidone (PVP) was dissolved in an aqueous solution containing acetonitrile, ethanol, and ammonia;

[0033] Tetrabutyl titanate (TBT) was added to the above solution under stirring, and the product was obtained by washing with ethanol and centrifuging;

[0034] The product is dried under vacuum conditions and then calcined in air to obtain the amorphous titanium dioxide powder.

[0035] Preferably, the drying temperature is 60-100° C., the calcination temperature is 300-500° C., and the calcination time is more than 2 hours. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, which are schematic and should not be construed as limiting the present invention in any way. In the accompanying drawings:

[0037] Figure 1 Shown is the X-ray diffraction pattern (XRD) of TiO2 in the present invention.

[0038] Figure 2 Shown is a scanning electron microscope image (SEM) of TiO2 in the present invention.

[0039] Figure 3 Shown are the electrochemical performance test results of Example 1 of the present invention.

[0040] Figure 4 Shown are the electrochemical performance test results of Example 2 of the present invention. DETAILED DESCRIPTION

[0041] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] The purpose of this invention is to provide a new solid-state battery based on lunar soil components, which not only solves the safety problems brought by traditional liquid electrolytes, but also avoids the high financial cost of carrying batteries from the earth to the moon.

[0043] To achieve the above objectives, the present invention proposes an innovative technical solution to prepare a new solid-state battery, including a metal negative electrode, a solid electrolyte, a positive electrode material and a positive electrode current collector.

[0044] Specifically, the metal anode is aluminum (Al), the solid electrolyte is aluminum oxide (Al2O3), the cathode material is amorphous titanium dioxide (TiO2), and the cathode current collector is titanium (Ti). All of these materials can be obtained directly or indirectly from lunar soil, ensuring the original utilization of extraterrestrial resources.

[0045] Prepare an aluminum sheet with a diameter of 10 mm in advance and calcine it at 300°C in air for two hours to form a micron-thick Al2O3 film on the surface of the aluminum sheet.

[0046] In a specific embodiment, the Al 2 O 3 thin film is formed on only one of the two surfaces of the aluminum sheet along the thickness direction.

[0047] Due to the lack of atmosphere and water on the moon, the chemical reaction environment is different from that on Earth. In addition, rapid cooling, high-energy radiation and frequent impacts all have an adverse effect on the formation and stability of the crystal structure, which makes it more likely that titanium dioxide on the moon exists in an amorphous form. Therefore, in order to restore the actual situation in the lunar soil to the greatest extent, amorphous titanium dioxide is used as the positive electrode material. 1g of polyvinyl pyrrolidone (PVP) was dissolved in an aqueous solution containing 25ml of acetonitrile, 85ml of ethanol and 2.4ml of ammonia. 2.5ml of tetrabutyl titanate (TBT) was added to the PVP solution under stirring. After vigorous stirring for 10 hours, the product was obtained by washing with ethanol and centrifugation. The product was dried at 60°C under vacuum conditions and then calcined at 300°C in air for two hours to obtain amorphous TiO2. The X-ray diffraction pattern (XRD) and scanning electron microscope image (SEM) of TiO2 are shown as follows, respectively. Figure 1 and Figure 2 shown.

[0048] According to the preparation method provided by the present invention, if the negative electrode uses an aluminum sheet with a diameter of 10 mm without any treatment, the electrolyte uses an Al2O3 thin disc extruded by a mold with a thickness of about 0.8 mm, and the amorphous titanium dioxide active material is coated on the titanium current collector as the positive electrode sheet.

[0049] This invention describes a method for preparing a new solid-state battery based on lunar regolith. Compared to lithium batteries brought from Earth, this method utilizes extraterrestrial resources in situ, significantly reducing battery production costs. Its preparation process is simple and significantly improves battery safety. The battery exhibits excellent performance, and because lunar regolith is abundant on the Moon, there is no need to worry about insufficient reserves. This method holds great promise for application and could provide a reliable energy solution for future long-term lunar habitation.

[0050] Example 1:

[0051] Prepare an aluminum sheet with a diameter of 10mm in advance and calcine it at 300℃ in air for two hours to form a micron-thick Al2O3 film on the surface of the aluminum sheet. The obtained amorphous TiO2 powder is extruded into thin discs through a mold to obtain TiO2 discs. Align the side of the aluminum sheet with the Al2O3 film with the TiO2 disc, and place a titanium current collector on the other side of the TiO2 disc. After assembling the battery, the electrochemical performance test is carried out with a current density of 500mA / g. The specific test results are as follows Figure 3 The charge and discharge specific capacity and coulombic efficiency of each cycle are shown in Table 1.

[0052] Table 1

[0053] Number of cycles Discharge capacity (mAh / g) Charge specific capacity (mAh / g) Coulomb efficiency 1 39.32 34.17 86.9％ 10 34.04 32.78 96.3％ 20 31.68 30.98 97.8％ 50 30.70 29.31 95.5％ 100 29.17 28.06 96.2％ 150 27.65 26.8l 97.0％ 200 24.87 24.45 98.3％

[0054] Example 2:

[0055] The Al2O3 powder is squeezed into an Al2O3 thin disc with a thickness of about 0.8mm through a die. Amorphous titanium dioxide, conductive agent, and PVDF are ground in a ratio of 6:3:1 and then added with NMP to form a slurry. The slurry is evenly coated on a titanium current collector with a diameter of 10mm, and the obtained electrode is used as the positive electrode. One side of the Al2O3 thin disc serving as the electrolyte is aligned with the aluminum sheet, and the positive electrode is placed on the other side. After the battery is assembled, the electrochemical performance test is carried out with a current density of 500mA / g. The specific test results are as follows Figure 4 The charge and discharge specific capacity and coulombic efficiency of each cycle are shown in Table 2.

[0056] Number of cycles <![CDATA[Discharge specific capacity (mAh g -1 )]]> Charge specific capacity (mAh / g) Coulomb efficiency 1 102.28 91.43 89.4％ 10 71.02 64.39 90.7％ 20 66.61 61.54 92.4％ 50 64.21 63.90 99.5％ 100 55.96 51.61 92.2％

[0057] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. A new solid-state battery, characterized in that: The battery comprises a metal negative electrode, a solid electrolyte and a positive electrode material, wherein the solid electrolyte is disposed between the metal negative electrode and the positive electrode material, wherein the metal negative electrode is aluminum, the solid electrolyte is Al2O3, and the positive electrode material is amorphous titanium dioxide; The positive electrode material is arranged on a positive electrode current collector, and the positive electrode current collector is titanium; The solid electrolyte is an Al2O3 thin film formed on the surface of the metal negative electrode, or the solid electrolyte is an Al2O3 thin disc formed by extrusion of a mold; The Al2O3 film has a thickness of micrometer level.

2. The solid-state battery according to claim 1, characterized in that The Al2O3 film preparation method comprises the following steps: preparing an aluminum sheet, and calcining the aluminum sheet in air to form the Al2O3 film on the surface of the aluminum sheet; the Al2O3 film is formed only on one of the two surfaces of the aluminum sheet in the thickness direction; The calcination temperature is 300-500°C and the time is more than 2 hours; The Al2O3 thin disc is formed by extruding Al2O3 powder through a die.

3. A method for preparing a new solid-state battery, characterized in that: The battery comprises a metal negative electrode, a solid electrolyte and a positive electrode material, wherein the solid electrolyte is disposed between the metal negative electrode and the positive electrode material, wherein the metal negative electrode is aluminum, the solid electrolyte is Al2O3, and the positive electrode material is amorphous titanium dioxide. The method comprises the following steps: preparing an aluminum sheet, and calcining the aluminum sheet in air to form an Al2O3 film on the surface of the aluminum sheet; preparing amorphous titanium dioxide powder; The obtained amorphous titanium dioxide powder is extruded into a thin disc through a die, the side of the aluminum sheet with the Al2O3 film formed thereon is aligned with the thin disc, and a titanium current collector is placed on the other side of the thin disc; The Al2O3 film has a thickness of micrometer level; The calcination temperature is 300-500° C. and the calcination time is more than 2 hours.

4. A method for preparing a new solid-state battery, characterized in that: The battery comprises a metal negative electrode, a solid electrolyte and a positive electrode material, wherein the solid electrolyte is disposed between the metal negative electrode and the positive electrode material, wherein the metal negative electrode is aluminum, the solid electrolyte is Al2O3, and the positive electrode material is amorphous titanium dioxide. The method comprises the following steps: Prepare aluminum sheets; extrude Al2O3 powder through a die to form Al2O3 thin discs; Amorphous titanium dioxide, conductive agent, and PVDF were ground and then added into NMP to form a slurry, which was evenly coated on the titanium current collector. The obtained electrode was used as the positive electrode; One side of the Al2O3 thin disc as electrolyte was aligned with the aluminum sheet, and the positive electrode was placed on the other side.

5. The method according to claim 3 or 4, characterized in that The preparation of amorphous titanium dioxide comprises the following steps: Polyvinyl pyrrolidone was dissolved in an aqueous solution containing acetonitrile, ethanol and ammonia; Tetrabutyl titanate was added to the above solution under stirring, and the product was obtained by washing with ethanol and centrifuging; The product is dried under vacuum conditions and then calcined in air to obtain the amorphous titanium dioxide.

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