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JP-7854602-B2 - battery

JP7854602B2JP 7854602 B2JP7854602 B2JP 7854602B2JP-7854602-B2

Inventors

  • 宮本 唯未
  • 藤本 正久
  • 大戸 貴司

Assignees

  • パナソニックＩＰマネジメント株式会社

Dates

Publication Date
20260507
Application Date
20220413
Priority Date
20210603

Claims (12)

  1. Positive electrode and, The negative electrode and, A negative electrode current collector electrically connected to the negative electrode, An electrolyte layer located between the positive electrode and the negative electrode, Equipped with, The positive electrode includes a positive electrode material, The positive electrode material comprises a positive electrode active material and a first solid electrolyte material. The positive electrode active material comprises a material represented by the following compositional formula (1), Li x Mn y O 2 ...Formula (1) Here, 0 ≤ x ≤ 1.05 and 0.9 ≤ y ≤ 1.1 are satisfied. The aforementioned negative electrode includes a material represented by the following compositional formula (2) as the negative electrode active material. NiBi a ...Formula (2) Here, 0 < a ≤ 3 is satisfied, The material represented by the above compositional formula (2) has a crystal structure that can be assigned to the space group C2/m, The negative electrode is a plating layer containing Ni. battery.
  2. The above compositional formula (1) satisfies 0 ≤ x ≤ 1, The battery according to claim 1.
  3. The aforementioned empirical formula (1) satisfies x = 1, The battery according to claim 2.
  4. The aforementioned empirical formula (1) satisfies y = 1. The battery according to claim 1 .
  5. The negative electrode includes a material represented by the composition formula (2) as the main component of the negative electrode active material. The battery according to claim 1 .
  6. The aforementioned composition formula (2) satisfies a = 1, The battery according to claim 1 .
  7. The aforementioned negative electrode comprises a material represented by the following composition formula (3): The battery according to claim 1 . Li z Bi...Formula (3) Here, z satisfies 0 < z ≤ 3.
  8. The aforementioned compositional formula (1) satisfies x = 0 and y = 1, and the aforementioned compositional formula (3) satisfies z = 3. The battery according to claim 7 .
  9. The first solid electrolyte material comprises Li, at least one element selected from the group consisting of metal elements and metalloid elements other than Li, and at least one element selected from the group consisting of Cl and Br. The battery according to claim 1 .
  10. The first solid electrolyte material includes a material represented by the following compositional formula (4): The battery according to claim 1 . Li α4 M β4 X γ4 ...Formula (4) Here, α4, β4, and γ4 are values greater than 0. M is at least one element selected from the group consisting of metallic elements and metalloid elements other than Li. X is at least one element selected from the group consisting of Cl and Br.
  11. The aforementioned composition formula (4) is, 2.5 ≤ α4 ≤ 3, 1 ≤ β4 ≤ 1.1, γ4 = 6 Satisfying The battery according to claim 10 .
  12. The electrolyte layer includes a first electrolyte layer and a second electrolyte layer. The first electrolyte layer is located between the positive electrode and the negative electrode. The second electrolyte layer is located between the first electrolyte layer and the negative electrode. The battery according to claim 1 .

Description

This disclosure relates to batteries. Patent Document 1 discloses the use of a product obtained by mixing and calcining LiOH and MnO2 as a positive electrode active material. In the embodiment of Patent Document 1, a battery is disclosed in which this positive electrode active material and a LiPb alloy as a negative electrode active material are used. Non-patent document 1 reveals that the product obtained by mixing and calcining LiOH and MnO2 is a composite of Li2MnO3 and MnO2 . Patent document 2 discloses an all-solid-state battery using a halide solid electrolyte. Japanese Patent Application Publication No. 3-43968International Publication No. 2019/146216 Furukawa, S., Noma, T., Teraji, K., Nakane, I., Yamamoto, Y., and Saito, T., "Lithium-containing manganese dioxide as a positive electrode active material for lithium secondary batteries," Electrochemistry and Industrial Physical Chemistry, 57, No. 6, pp. 533-538 (1989). Figure 1 is a cross-sectional view showing the schematic configuration of the battery 2000 in Embodiment 1.Figure 2 is a cross-sectional view showing the schematic configuration of the battery 3000 in Embodiment 2.Figure 3 is a graph showing the X-ray diffraction pattern of NiBi fabricated on nickel foil in Example 1.Figure 4 is a graph showing the charge and discharge curves of the battery in Example 1. (Summary of one aspect of this disclosure) The battery relating to the first aspect of this disclosure is Positive electrode and, The negative electrode and, An electrolyte layer located between the positive electrode and the negative electrode, Equipped with, The positive electrode comprises a positive electrode active material and a first solid electrolyte material. The positive electrode active material comprises a material represented by the following compositional formula (1), Li x Mn y O 2 ...Formula (1) Here, 0 ≤ x ≤ 1.05 and 0.9 ≤ y ≤ 1.1 are satisfied. The aforementioned negative electrode includes an alloy containing Ni and Bi as the negative electrode active material. According to the first embodiment, a novel operable battery is provided in which Li x Mn y O 2 (0 ≤ x ≤ 1.05, 0.9 ≤ y ≤ 1.1) is used as the positive electrode active material and an alloy containing Ni and Bi is used as the negative electrode active material. In a second aspect of this disclosure, for example, in the battery according to the first aspect, the composition formula (1) may satisfy 0 ≤ x ≤ 1. In the battery according to the second embodiment, the positive electrode active material sufficiently absorbs and releases Li. In a third aspect of this disclosure, for example, in the battery according to the second aspect, the composition formula (1) may satisfy x = 1. The battery according to the third embodiment may be capable of charging and discharging at greater depths because the positive electrode active material absorbs and releases Li more sufficiently. In a fourth aspect of this disclosure, for example, in a battery according to any one of the first to third aspects, the composition formula (1) may satisfy y = 1. The battery according to the fourth embodiment may be capable of charging and discharging at greater depths because the positive electrode active material absorbs and releases Li more sufficiently. In a fifth aspect of this disclosure, for example, in a battery according to any one of the first to fourth aspects, the negative electrode may include an alloy containing Ni and Bi as the main components of the negative electrode active material. According to the fifth embodiment, the discharge flatness of the negative electrode is improved, and the battery operates more smoothly. In a sixth aspect of this disclosure, for example, in a battery according to any one of the first to fifth aspects, the alloy containing Ni and Bi may be represented by the following compositional formula (2). NiBi a ...Formula (2) Here, a satisfies 0 < a ≤ 3. According to the sixth embodiment, the discharge flatness of the negative electrode is improved. In a seventh aspect of this disclosure, for example, in the battery according to the sixth aspect, the composition formula (2) may satisfy a = 1. According to the seventh embodiment, the battery operates more efficiently. In the eighth aspect of this disclosure, for example, in a battery according to any one of the first to seventh aspects, the negative electrode may include a material represented by the following composition formula (3). Li z Bi...Formula (3) Here, z satisfies 0 < z ≤ 3. In the eighth embodiment of the battery, sufficient Li is absorbed and released at the negative electrode. In the ninth aspect of this disclosure, for example, in the battery according to the eighth aspect, the composition formula (1) may satisfy x = 0 and y = 1, and the composition formula (3) may satisfy z = 3. In the battery according to the ninth embodiment, Li is sufficiently absorbed and released at the positive and negative electrodes. In a tenth embodiment of this disclosure