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CN-122025617-A - Positive electrode active material for chloride ion battery, method for producing same, positive electrode mixture for chloride ion battery, and chloride ion battery

CN122025617ACN 122025617 ACN122025617 ACN 122025617ACN-122025617-A

Abstract

The present disclosure provides a novel positive electrode active material for a chloride ion battery, a method for producing the same, a positive electrode mixture for a chloride ion battery containing such a positive electrode active material, and a chloride ion battery containing such a positive electrode mixture. The positive electrode active material for a chloride ion battery of the present disclosure is strontium ruthenium oxide having a layered perovskite structure. The method of manufacturing a cathode active material for a chloride ion battery includes the steps of (a) mixing strontium carbonate and ruthenium oxide to prepare a raw material mixture, (b) granulating the raw material mixture to form granules, and (c) firing the granules. The positive electrode mixture for a chloride ion battery of the present disclosure contains the positive electrode active material for a chloride ion battery of the present disclosure. The chloride ion battery of the present disclosure has a positive electrode active material layer, and the positive electrode active material layer contains the positive electrode mixture for the chloride ion battery of the present disclosure.

Inventors

  • MIKI HIDENORI

Assignees

  • 丰田自动车株式会社

Dates

Publication Date
20260512
Application Date
20250804
Priority Date
20241111

Claims (5)

  1. 1. A positive electrode active material for a chloride ion battery, Is strontium ruthenium oxide with a layered perovskite structure.
  2. 2. The positive electrode active material for a chloride ion battery according to claim 1, The strontium ruthenium oxide is Sr 3 Ru 2 O x , wherein x is more than or equal to 5 and less than or equal to 7.
  3. 3. A positive electrode mixture for a chloride ion battery, comprising the positive electrode active material for a chloride ion battery according to claim 1 or 2.
  4. 4. A chloride ion battery has a positive electrode active material layer, The positive electrode active material layer contains the positive electrode mixture for a chloride ion battery according to claim 3.
  5. 5. A method for producing the positive electrode active material for a chloride ion battery according to claim 1 or 2, comprising the steps of (a) mixing strontium carbonate and ruthenium oxide to prepare a raw material mixture; a step (b) of granulating the raw material mixture to form granules, and And (c) firing the pellets.

Description

Positive electrode active material for chloride ion battery, method for producing same, positive electrode mixture for chloride ion battery, and chloride ion battery Technical Field The present disclosure relates to a positive electrode active material for a chloride ion battery, a method for producing the same, a positive electrode mixture for a chloride ion battery, and a chloride ion battery. Background Metal chlorides are known as positive electrode active materials of chloride ion batteries as disclosed in Xiangyu Zhao et al, "Chloride ION BATERRY: a new member in there chargeable BATTERY family" (chloride ion batteries: a new generation of rechargeable battery series), journal of Power Sources 245 (2014) 706-711 and Ryo SAKAMOTO et al 、"Room-temperture Operation of All-SOLID-STATE Chloride-ION Battery with Perovskite-type CsSn0.95Mn0.05Cl3 as a Solid Electrolyte"(, room temperature operation of all-solid-state chloride ion batteries with perovskite CsSn 0.95Mn0.05Cl3 as a solid electrolyte), electrochemistry,91 (7), 077003 (2023), and japanese patent application laid-open No. 2022-126132. Disclosure of Invention The purpose of the present disclosure is to provide a novel positive electrode active material for a chloride ion battery, a method for producing the same, a positive electrode mixture for a chloride ion battery containing such a positive electrode active material, and a chloride ion battery containing such a positive electrode mixture. The present inventors have found that the above problems can be solved by the following means. < Mode 1> The positive electrode active material for chloride ion battery is strontium ruthenium oxide with layered perovskite structure. < Mode 2> The positive electrode active material for a chloride ion battery according to the mode 1, wherein the strontium ruthenium oxide is Sr 3Ru2Ox (5≤x≤7). < Mode 3> A positive electrode mixture for a chloride ion battery, comprising the positive electrode active material for a chloride ion battery according to any one of modes 1 and 2. < Mode 4> A chloride ion battery has a positive electrode active material layer, and The positive electrode active material layer contains the positive electrode mixture for a chloride ion battery described in embodiment 3. < Mode 5> The method for producing a positive electrode active material for a chloride ion battery according to any one of modes 1 to 2, comprising the steps of: A step (a) of mixing strontium carbonate and ruthenium oxide to prepare a raw material mixture; a step (b) of granulating the raw material mixture to form granules, and And (c) firing the pellets. According to the present disclosure, a novel positive electrode active material for a chloride ion battery, a method for producing the same, a positive electrode mixture for a chloride ion battery containing such a positive electrode active material, and a chloride ion battery containing such a positive electrode mixture can be provided. Drawings Features, advantages, and technical and industrial significance of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings, in which like numerals denote like elements. Fig. 1 is a schematic cross-sectional view showing an example of a chloride ion battery of the present disclosure. Fig. 2A is an XRD spectrum of the battery of the example. Fig. 2B is an enlarged view of the XRD spectrum of fig. 2A in the 8 ° to 38 ° region. Fig. 3 is a charge-discharge curve of the battery of the embodiment. Fig. 4 is a charge-discharge curve of the battery of the comparative example. Fig. 5 is a graph showing the cycle characteristics of the battery of the comparative example, that is, the relationship between the number of cycles of charge and discharge and the capacity. Detailed Description Hereinafter, embodiments of the present disclosure will be described in detail. The present disclosure is not limited to the following embodiments, and can be implemented by various modifications within the scope of the disclosed subject matter. Positive electrode active material for chloride ion battery The positive electrode active material for a chloride ion battery of the present disclosure is strontium ruthenium oxide having a layered perovskite structure. The present disclosure surprisingly found that strontium ruthenium oxide having a layered perovskite structure functions as a positive electrode active material for a chloride ion battery. The present inventors have found that such a positive electrode active material for a chloride ion battery can improve the cycle characteristics of the battery. The present disclosure has considered that, in a battery including a conventional positive electrode active material for a chloride ion battery as a metal chloride, for example, cycle characteristics are deteriorated for the following reasons: the positive electrode active material as the metal chloride is easily dissolved in the electrolyte In a batt