Positive electrode active material for anion battery and anion battery

Abstract

The present invention relates to a positive electrode active material for an anion battery and an anion battery. The positive electrode active material for an anion battery of the present invention is a compound containing a lanthanoid element, sulfur, and chlorine. The anion battery of the present invention has a positive electrode active material layer, and the positive electrode active material layer contains the positive electrode active material for an anion battery of the present invention.

Description

Technical Field

[0001] This invention relates to positive electrode active materials for anion batteries and anion batteries. Background Technology

[0002] As disclosed in Japanese Patent Application Publication No. 2022-126132 and Xiangyu Zhao et al., “Chloride ION BATTERY: a new member in the rechargeable BATTERY family”, Journal of Power Sources 245(2014)706-711, metal chlorides are known as positive electrode active materials for chloride ion batteries, which are a type of anion battery. Summary of the Invention

[0003] The purpose of this invention is to provide a novel positive electrode active material for anion batteries and an anion battery containing such a positive electrode active material.

[0004] The inventors of this application have discovered that the above-mentioned problems can be solved by the following means.

[0005] <Method 1>

[0006] A positive electrode active material for anion batteries, which is a compound containing lanthanide elements, sulfur, and chlorine.

[0007] <Method 2>

[0008] According to the positive electrode active material for anion batteries described in Method 1, the aforementioned lanthanide element is lanthanum.

[0009] <Method 3>

[0010] According to the positive electrode active material for anion batteries described in Method 2, the above-mentioned compound is a compound represented by the formula LaSCl.

[0011] <Method 4>

[0012] An anion battery having a positive electrode active material layer, and

[0013] The above-mentioned positive electrode active material layer contains any one of the positive electrode active materials for anion batteries according to methods 1 to 3.

[0014] <Method 5>

[0015] The battery according to method 4, wherein the anion battery is a chloride ion battery.

[0016] According to the present invention, novel positive electrode active materials for anion batteries and anion batteries containing such positive electrode active materials can be provided. Attached Figure Description

[0017] Hereinafter, the features, advantages, and technical and industrial significance of exemplary embodiments of the present invention will be described with reference to the accompanying drawings, wherein the same symbols denote the same elements.

[0018] Figure 1 This is a schematic cross-sectional view showing an example of the anion battery of the present invention.

[0019] Figure 2 This is the XRD pattern of the positive electrode active material of Example 1.

[0020] Figure 3 This is a diagram showing the crystal structure of LaSCl.

[0021] Figure 4 This is the charge / discharge curve of the battery in Example 1.

[0022] Figure 5 This is the XRD pattern of the positive electrode active material in Example 2.

[0023] Figure 6 This is the charge / discharge curve of the battery in Example 2. Detailed Implementation

[0024] The embodiments of the present invention will now be described in detail. It should be noted that the present invention is not limited to the following embodiments, and various modifications can be made within the scope of the disclosed intent.

[0025] Positive electrode active material for anion batteries

[0026] The positive electrode active material for anion batteries of the present invention is a compound containing lanthanide elements, sulfur, and chlorine.

[0027] The inventors of this application unexpectedly discovered that compounds containing lanthanides, sulfur, and chlorine function as positive electrode active materials for anion batteries.

[0028] In addition, the inventors of this application have discovered that such anion batteries can use positive electrode active materials to enable high voltage batteries.

[0029] Regarding the reason why positive electrode active materials for anion batteries containing lanthanides, sulfur, and chlorine compounds can achieve high voltage, we do not intend to be bound by any theory, but speculate as follows: First, it is believed that by using positive electrode active materials for anion batteries as composite anionized compounds containing sulfur and chloride ions, the standard reduction potential is low, thus easily generating easily oxidized lanthanide ions, thereby enabling high potential on the positive electrode side. Second, it is believed that this is because compounds containing lanthanides, sulfur, and chlorine have a porous crystal structure, thus effectively introducing anions such as chloride ions as charge carrier ions.

[0030] As for the lanthanide elements, there are no particular limitations; for example, it can be lanthanum, cerium, etc., but in particular, it can be lanthanum. In this case, the compound containing lanthanide elements, sulfur, and chlorine can be a compound represented by the formula LaSCl. The compound containing lanthanide elements, sulfur, and chlorine can be a compound represented by the formula CeSCl. Thus, it is possible to effectively increase the voltage of the battery.

[0031] The shape and size of the positive electrode active material for anion batteries in this invention are not particularly limited as long as they can function as the positive electrode active material of anion batteries.

[0032] The positive electrode active material for anion batteries of the present invention can be manufactured by the manufacturing method described later, or by other methods.

[0033] Method for manufacturing positive electrode active material for anion batteries

[0034] The positive electrode active material for anion batteries of the present invention can be manufactured by applying mechanical impact to two or more raw materials in a specified molar ratio.

[0035] In the case of manufacturing compounds represented by the formula LaSCl, the raw materials can be lanthanum chloride (LaCl3) and lanthanum sulfide (La2S3).

[0036] In the case of manufacturing compounds represented by the formula CeSCl, the raw materials can be cerium chloride (CeCl3) and cerium sulfide (Ce2S3).

[0037] The molar ratio of the reactants is not particularly limited. When manufacturing compounds represented by the formulas LaSCl and CeSCl, the molar ratio of the reactants can be, for example, LaCl3 / La2S3 = 1 / 1 and CeCl3 / Ce2S3 = 1 / 1, respectively. Therefore, compounds represented by the formulas LaSCl and CeSCl can be easily manufactured.

[0038] As a method of applying mechanical impact to raw materials, the mechanochemical method can be exemplified. Specifically, the method of mixing raw materials using a ball mill can be listed. The ball mill can operate in any mode, such as planetary, vibratory, or rotary. By using a planetary ball mill, the mixing of raw materials can be carried out efficiently. This process can be performed under an inert gas atmosphere.

[0039] When using a planetary ball mill to mix raw materials, there are no particular limitations on the rotation speed of the turntable, the mixing time, etc.

[0040] Positive electrode composite material for anion batteries

[0041] The positive electrode composite material for anion batteries includes the positive electrode active material for anion batteries of the present invention, and may optionally include a solid electrolyte, conductive additives, etc.

[0042] Regarding this invention, "positive electrode composite material" refers to a composition that can directly form a positive electrode active material layer or form a positive electrode active material layer by further containing other components.

[0043] Positive electrode active material

[0044] The positive electrode composite material for anion batteries includes the positive electrode active material for anion batteries of the present invention. For details regarding the positive electrode active material for anion batteries of the present invention, please refer to the above description.

[0045] The positive electrode active material contained in the positive electrode composite material may be only the positive electrode active material for anion batteries of the present invention, or it may be a combination of the positive electrode active material for anion batteries of the present invention and other positive electrode active materials. In particular, the positive electrode active material contained in the positive electrode composite material may be only the positive electrode active material for anion batteries of the present invention.

[0046] The positive electrode active material for the anion battery of the present invention is not particularly limited to any material other than the positive electrode active material. For example, in the case of a chloride ion battery, the positive electrode active material of the present invention can be a metal chloride. The metal chloride is not particularly limited, and can be, for example, a chloride of metal-poor materials such as bismuth chloride (BiCl3), gallium chloride (GaCl3), and indium chloride (InCl3); a chloride of noble metals such as copper chloride (CuCl) and silver chloride (AgCl); a chloride of iron group elements such as nickel chloride (NiCl2), cobalt chloride (CoCl2), and iron chloride (FeCl2); or a vanadium chloride (VCl3) and other materials known as positive electrode active materials for chloride ion batteries.

[0047] The content of the positive electrode active material in the positive electrode composite material can be, for example, 1% or more by mass, 5% or more by mass, 10% or more by mass, 15% or more by mass, 20% or more by mass, 25% or more by mass, or 30% or more by mass. Alternatively, it can be less than 100% by mass, less than 80% by mass, less than 60% by mass, less than 50% by mass, less than 45% by mass, less than 40% by mass, less than 35% by mass, or less than 30% by mass. This content can also be 10% or more by mass and less than 50% by mass, 15% or more by mass and less than 45% by mass, or 20% or more by mass and less than 40% by mass.

[0048] There are no particular restrictions on the shape and size of the positive electrode active material, as long as it can function as the positive electrode active material of an anion battery.

[0049] solid electrolyte

[0050] The positive electrode composite material can contain a solid electrolyte. The solid electrolyte assists in the conduction of anions, which act as charge carriers.

[0051] For example, when the anion battery of the present invention is a chloride ion battery, the solid electrolyte is not particularly limited, and can be at least one selected from tin chloride (SnCl2), strontium chloride (SrCl2), barium chloride (BaCl2), etc.

[0052] Solid electrolytes can be substances doped with potassium (K) in the above-mentioned chlorides, such as Sr. 1-x K x C 2-x (0 < x ≤ 0.1).

[0053] Sr 1-x K x C 2-x (0<x≤0.1) For example, it can be manufactured by applying mechanical impact to strontium chloride (SrCl2) and potassium chloride (KCl) in a specified molar ratio.

[0054] Mechatronics is an example of such a method. Specifically, methods using a ball mill to mix raw materials can be listed. The ball mill can operate in any mode, such as planetary, vibratory, or rotary. Using a planetary ball mill allows for efficient mixing of raw materials. This process can be carried out under a non-reactive gas atmosphere.

[0055] When using a planetary ball mill to mix raw materials, there is no particular limitation on the rotation speed of the turntable. For example, it can be above 300 rpm, above 400 rpm, above 500 rpm, or above 600 rpm. Alternatively, it can be below 1000 rpm, below 900 rpm, below 800 rpm, below 700 rpm, or below 600 rpm.

[0056] When using a planetary ball mill to mix raw materials, there is no particular limitation on the mixing time. It can be more than 0.5 hours, more than 1 hour, more than 2 hours, or more than 3 hours. Alternatively, it can be less than 10 hours, less than 8 hours, less than 6 hours, less than 4 hours, or less than 3 hours.

[0057] Alternatively, the solid electrolyte can be, for example, CsSnCl3, or CsSn doped with yttrium (Y). 1- x Y x Cl 3+x (0 < x ≤ 0.1).

[0058] CsSnCl3 can be manufactured, for example, by applying mechanical impact to a specified molar ratio of cesium chloride (CsCl) and tin chloride (SnCl2). Additionally, CsSn... 1-x Y x Cl 3+x (0<x≤0.1) For example, it can be manufactured by applying mechanical impact to cesium chloride (CsCl), tin chloride (SnCl2) and yttrium chloride (YCl3) in a specified molar ratio.

[0059] Mechatronics is an example of such a method. Specifically, methods using a ball mill to mix raw materials can be listed. The ball mill can operate in any mode, such as planetary, vibratory, or rotary. Using a planetary ball mill allows for efficient mixing of raw materials. This process can be carried out under a non-reactive gas atmosphere.

[0060] When using a planetary ball mill to mix raw materials, there is no particular limitation on the rotation speed of the turntable. For example, it can be above 300 rpm, above 400 rpm, above 500 rpm, or above 600 rpm. Alternatively, it can be below 1000 rpm, below 900 rpm, below 800 rpm, below 700 rpm, or below 600 rpm.

[0061] When using a planetary ball mill to mix raw materials, there is no particular limitation on the mixing time; it can be more than 1 hour, more than 3 hours, more than 5 hours, or more than 10 hours, or less than 30 hours, less than 20 hours, less than 15 hours, or less than 10 hours.

[0062] The content of solid electrolyte in the positive electrode composite material can be, for example, more than 1% by mass, more than 10% by mass, more than 30% by mass, more than 50% by mass, or more than 60% by mass. Alternatively, it can be less than 99% by mass, less than 90% by mass, less than 80% by mass, less than 70% by mass, or less than 60% by mass.

[0063] There are no particular restrictions on the shape or size of solid electrolytes, as long as they can function as solid electrolytes in anion batteries.

[0064] Conductive additives

[0065] Positive electrode composite materials may contain conductive additives. As for conductive additives, there are no particular limitations as long as they have electronic conductivity.

[0066] Conductive additives can be, for example, carbon materials, elemental metals or metal compounds, or combinations thereof.

[0067] The carbon material can be at least one of the following: carbon black such as acetylene black, Ketjen black, and furnace black; graphite powder; fibrous carbon materials such as vapor-grown carbon fiber (VGCF).

[0068] There is no particular limitation on the content of conductive additives in the positive electrode composite material. For example, it can be more than 1% by mass, more than 5% by mass, or more than 10% by mass. Alternatively, it can be less than 30% by mass, less than 20% by mass, or less than 10% by mass.

[0069] Other ingredients

[0070] The cathode composite material may contain components other than those mentioned above, or it may not contain any. There are no particular limitations on such components; for example, binders can be listed. The binder simply needs to be a chemically and electrically stable substance in anion batteries. The type and content of such components can be appropriately set.

[0071] Manufacturing method of positive electrode composite material for anion batteries

[0072] The positive electrode composite material for anion batteries can be manufactured by applying mechanical impact to the raw materials.

[0073] One method of applying mechanical impact to raw materials is, for example, mixing them using a ball mill. The ball mill can operate in any mode, such as planetary, vibratory, or rotary. Using a planetary ball mill allows for efficient mixing of raw materials. This process can be carried out in a non-reactive gas atmosphere.

[0074] When using a planetary ball mill to mix raw materials, there is no particular limitation on the rotation speed of the turntable. For example, it can be above 10 rpm, above 30 rpm, above 50 rpm, or above 100 rpm. Alternatively, it can be below 500 rpm, below 300 rpm, below 200 rpm, or below 100 rpm.

[0075] When using a planetary ball mill to mix raw materials, there is no particular limitation on the mixing time; it can be more than 1 hour, more than 3 hours, more than 5 hours, or more than 10 hours, or less than 30 hours, less than 20 hours, less than 15 hours, or less than 10 hours.

[0076] Anion batteries

[0077] The anion battery of the present invention has a positive electrode active material layer, and the positive electrode active material layer contains the positive electrode active material for anion batteries of the present invention. Because the anion battery of the present invention contains the positive electrode active material for anion batteries of the present invention, it has a high operating voltage.

[0078] like Figure 1 As illustrated, the anion battery 1 of the present invention may sequentially have a positive electrode active material layer 20, an electrolyte layer 30, and a negative electrode active material layer 40.

[0079] The anion battery of the present invention can be a liquid battery or a solid-state battery, particularly a solid-state battery. It should be noted that, in the context of the present invention, a "solid-state battery" refers to a battery that uses at least a solid electrolyte as the electrolyte; therefore, a solid-state battery can use a combination of a solid electrolyte and a liquid electrolyte as the electrolyte. Additionally, a solid-state battery can also be an all-solid-state battery, that is, a battery that uses only a solid electrolyte as the electrolyte.

[0080] Anion batteries can be primary or secondary batteries, especially secondary batteries.

[0081] There are no particular limitations on anion batteries; for example, they can be fluorine-ion batteries, chloride-ion batteries, etc., especially chloride-ion batteries.

[0082] Anion batteries can be shaped like coins, laminated (pouch), cylindrical, or square.

[0083] Anion batteries can be manufactured by forming the above layers using dry or wet methods.

[0084] The anion battery of the present invention may be suitable for use in at least one vehicle selected from hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), and battery electric vehicles (BEVs).

[0085] Hereinafter, the elements constituting the anion battery of the present invention will be described by way of example, in the case that the anion battery of the present invention is an all-solid-state chloride-ion battery.

[0086] Positive electrode active material layer

[0087] The positive electrode active material layer contains the positive electrode active material for anion batteries of the present invention. For details regarding the positive electrode active material for anion batteries of the present invention, please refer to the above description.

[0088] The positive electrode active material layer can be a pressed powder of a positive electrode composite material containing the positive electrode active material for anion batteries of the present invention.

[0089] The shape of the positive electrode active material layer is not particularly limited; for example, it can be a sheet with a generally planar shape.

[0090] There is no particular limitation on the thickness of the positive electrode active material layer, as long as it is an appropriate thickness corresponding to the composition of the anion battery. For example, the thickness of the positive electrode active material layer can be greater than 100 nm and less than 1 mm.

[0091] Electrolyte layer

[0092] The electrolyte layer can be a solid electrolyte layer containing a solid electrolyte. For information on solid electrolytes, please refer to the above description.

[0093] The shape of the electrolyte layer is not particularly limited; for example, it can be a sheet with a generally planar shape.

[0094] There is no particular limitation on the thickness of the electrolyte layer, as long as it is an appropriate thickness corresponding to the structure of the anion battery. For example, the thickness of the electrolyte layer can be greater than 100 nm and less than 1 mm.

[0095] Negative electrode active material layer

[0096] The negative electrode active material layer contains negative electrode active material, and may optionally contain solid electrolyte, conductive additives, etc.

[0097] There are no particular limitations on the negative electrode active material as long as it has a lower potential than the positive electrode active material. Examples of such active materials include elemental metals such as lead (Pb) and tin (Sn), their alloys, oxides, and chlorides.

[0098] The negative electrode active material can be, for example, CsSnCl3, or CsSn doped with yttrium (Y). 1-x Y x Cl 3+x (0 < x ≤ 0.1).

[0099] CsSnCl3 can be manufactured, for example, by applying mechanical impact to a specified molar ratio of cesium chloride (CsCl) and tin chloride (SnCl2).

[0100] Mechatronics is an example of such a method. Specifically, methods using a ball mill to mix raw materials can be listed. The ball mill can operate in any mode, such as planetary, vibratory, or rotary. Using a planetary ball mill allows for efficient mixing of raw materials. This process can be carried out under a non-reactive gas atmosphere.

[0101] When using a planetary ball mill to mix raw materials, there is no particular limitation on the rotation speed of the turntable. For example, it can be above 300 rpm, above 400 rpm, above 500 rpm, or above 600 rpm. Alternatively, it can be below 1000 rpm, below 900 rpm, below 800 rpm, below 700 rpm, or below 600 rpm.

[0102] When using a planetary ball mill to mix raw materials, there is no particular limitation on the mixing time; it can be more than 1 hour, more than 3 hours, more than 5 hours, or more than 10 hours, or less than 30 hours, less than 20 hours, less than 15 hours, or less than 10 hours.

[0103] For information on solid electrolytes and conductive additives, please refer to the above description.

[0104] The shape of the negative electrode active material layer is not particularly limited; for example, it can be a sheet with a generally planar shape.

[0105] There is no particular limitation on the thickness of the negative electrode active material layer, as long as it is an appropriate thickness corresponding to the structure of the anion battery. For example, the thickness of the negative electrode active material layer can be greater than 100 nm and less than 1 mm.

[0106] Other components

[0107] like Figure 1 As shown, the anion battery of the present invention may further include a positive electrode current collector layer 10 and a negative electrode current collector layer 50. The materials, shapes, thicknesses, etc., of the positive and negative electrode current collector layers are not particularly limited, as long as they can function as current collector layers for use in an anion battery. Furthermore, the anion battery of the present invention may further have configurations other than those shown.

[0108] Example 1

[0109] Synthesis of positive electrode active materials for anion batteries

[0110] Lanthanum chloride (LaCl3) and lanthanum sulfide (La2S3) were weighed in a 1:1 molar ratio, and the positive electrode active material was obtained by a mechanochemical method using a ball mill.

[0111] Manufacturing of chloride ion batteries

[0112] The positive electrode active material was weighed at a mass ratio of 30:60:10, and potassium (K)-doped SrCl2 (Sr) was used as the solid electrolyte. 0.97 K 0.03 Cl 1.97 The mixture consisted of vapor-grown carbon fiber (VGCF) (manufactured by Showa Denko) as a conductive additive. The total amount of raw materials used was 10 mg. The above raw materials were mixed in a ball mill at 100 rpm for 10 hours to obtain a positive electrode composite material. This composite material was then pressed into powder to form a positive electrode active material layer.

[0113] Sr as a solid electrolyte 0.97 K 0.03 Cl 1.97 Strontium chloride (SrCl2) and potassium chloride (KCl) were synthesized by mixing them at 600 rpm for 3 hours using a ball mill.

[0114] The solid electrolyte layer is formed by using Sr as a solid electrolyte. 0.97 K 0.03 Cl 1.97 It is formed by pressing 100mg of powder into shape.

[0115] The negative electrode active material layer is formed by placing tin (Sn) foil on one side of the layer formed using 50 mg of CsSnCl3 (the side on which the negative electrode current collector layer is subsequently configured). CsSnCl3 is synthesized by weighing cesium chloride (CsCl) and tin chloride (SnCl2) in a specified molar ratio and mixing them in a ball mill at 600 rpm for 10 hours.

[0116] A solid-state chloride-ion battery is fabricated by sequentially stacking a positive electrode current collector layer, a positive electrode active material layer, a solid electrolyte layer, a negative electrode active material layer, and a negative electrode current collector layer.

[0117] evaluate

[0118] XRD measurement

[0119] XRD analysis was performed on samples obtained during the synthesis of positive electrode active materials for anion batteries. For XRD analysis, a Rigaku Ultima IV X-ray diffractometer was used as the X-ray diffractometer. The diffractometer was irradiated with CuKα rays under an inactive gas atmosphere, with a tube voltage of 40 kV and a tube current of 40 mA. The samples were sealed in an argon atmosphere on an airtight sample stage, and the measurements were performed without atmospheric exposure. A glass sample holder was used as the substrate for mounting the samples. The resulting XRD patterns are shown below. Figure 2 .

[0120] like Figure 2 As shown, in the XRD pattern, a peak different from the peak of the raw material La2S3 mixed in the sample was observed, and it was identified as LaSCl.

[0121] Figure 3 The crystal structure of LaSCl is shown. (Example:) Figure 3 As shown, it can be confirmed that there are many voids in this crystal structure.

[0122] Charge and discharge test

[0123] For the chloride ion battery of Example 1, a vacuum was drawn in a sealed container while the test was conducted at a temperature of 200°C and a current density of 0.03 mA / cm². 2 Under the specified conditions, charging and discharging are performed. As the charging termination condition, the upper limit voltage is set to 2.0V, and the lower limit current is set to 0.001mA / cm. 2 Constant voltage charging was performed. As a discharge termination condition, the lower limit voltage was set to -0.5V. The charge-discharge test used an electrochemical measurement system equipped with a frequency response analyzer (BioLogic VMP-300 high-performance electrochemical measurement system).

[0124] The charge-discharge curves of the battery from Example 1 are shown below. Figure 4 For example Figure 4 As shown, a discharge reaction at a high potential exceeding 1.0V vs. Sn / SnCl2 was confirmed in the battery of Example 1.

[0125] Here, the operating voltage of the chloride-ion battery described in Xiangyu Zhao et al., “Chloride ION BATTERY: a new member in the rechargeable BATTERY family”, Journal of Power Sources 245(2014)706-711, which uses BiCl3 and CuCl2 as positive electrode active materials and lithium metal as negative electrode active material, is 2.89V and 3.07V respectively. In contrast, the operating voltage of the same battery, except that the positive electrode active material is LaSCl, is 3.5V or higher. That is, it is confirmed that the operating voltage of the chloride-ion battery containing the positive electrode active material of the present invention is higher than that of the battery described in Xiangyu Zhao et al., “Chloride ION BATTERY: a new member in the rechargeable BATTERY family”, Journal of Power Sources 245(2014)706-711.

[0126] It should be noted that when the raw material La2S3 was used as the positive electrode active material, the same charge-discharge test was carried out, and the results confirmed that no capacity was observed, indicating that La2S3 did not contribute to the electrode reaction.

[0127] Example 2

[0128] Synthesis of positive electrode active materials for anion batteries

[0129] Cerium chloride (CeCl3) and cerium sulfide (Ce2S3) were weighed in a 1:1 molar ratio, and the positive electrode active material was obtained by a mechanochemical method using a ball mill.

[0130] Manufacturing of chloride ion batteries

[0131] The positive electrode active material, CsSnCl3 (CsSn), doped with yttrium (Y), was weighed at a mass ratio of 30:60:10 as the solid electrolyte. 0.95 Y 0.05 Cl 3.05 The mixture consisted of vapor-grown carbon fiber (VGCF) (manufactured by Showa Denko) as a conductive additive. The total amount of raw materials used was 10 mg. The above raw materials were mixed in a ball mill at 100 rpm for 10 hours to obtain a positive electrode composite material. This composite material was then pressed into powder to form a positive electrode active material layer.

[0132] CsSn as a solid electrolyte 0.95 Y 0.05 Cl 3.05 The yttrium chloride (CsCl), tin chloride (SnCl2), and yttrium chloride (YCl3) were synthesized by weighing cesium chloride (CsCl), tin chloride (SnCl2), and yttrium chloride (YCl3) in a specified molar ratio and mixing them in a ball mill at 600 rpm for 10 hours.

[0133] The solid electrolyte layer is formed by using CsSn as a solid electrolyte. 0.95 Y 0.05 Cl 3.05 It is formed by pressing 100mg of powder into shape.

[0134] The negative electrode active material layer is formed by using Sn and CsSn 0.95 Y 0.05 Cl 3.05 Sn foil is formed by placing a Sn foil on one side of a 50mg layer (the side on which the negative electrode current collector layer is subsequently configured).

[0135] A solid-state chloride-ion battery is fabricated by sequentially stacking a positive electrode current collector layer, a positive electrode active material layer, a solid electrolyte layer, a negative electrode active material layer, and a negative electrode current collector layer.

[0136] evaluate

[0137] XRD measurement

[0138] The sample obtained in the synthesis process of the positive electrode active material for anion batteries was subjected to XRD analysis. The XRD analysis was performed using the same method as in Example 1. The resulting XRD pattern is shown below. Figure 5 .

[0139] The XRD pattern showed a peak that was different from the peak of Ce2S3, a raw material mixed in the sample, and identified it as CeSCl.

[0140] Charge and discharge test

[0141] The chloride ion battery of Example 2 was charged and discharged in the same manner as in Example 1.

[0142] The obtained charge-discharge curves are shown in Figure 6 .like Figure 6 As shown, a discharge reaction at a high potential exceeding 1.0V vs. Sn / SnCl2 was confirmed in the battery of Example 2.

Claims

1. A positive electrode active material for anion batteries, which is a compound containing lanthanide elements, sulfur, and chlorine.

2. The positive electrode active material for anionic batteries according to claim 1, wherein, The lanthanide element mentioned is lanthanum.

3. The positive electrode active material for anion batteries according to claim 2, wherein, The compound is represented by the formula LaSCl.

4. An anion battery having a positive electrode active material layer, and The positive electrode active material layer contains the positive electrode active material for anion batteries as described in any one of claims 1 to 3.

5. The battery according to claim 4, wherein, The anion battery is a chloride ion battery.

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