Solid Electrolyte, Lithium Battery, Battery Pack, And Vehicle

A solid electrolyte and lithium battery technology, which is applied in the direction of solid electrolyte, electrolyte battery manufacturing, non-aqueous electrolyte battery, etc., can solve the problems of low conductivity, difficulty in stable and low-cost production, and large practical application, so as to achieve low cost, Excellent discharge rate performance and high lithium ion conductivity

Active Publication Date: 2018-03-27
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, since lanthanum, which is a rare earth element, is included in the constituent elements of this compound, it is difficult to produce it stably and at low cost, and practical application is a big problem.
Therefore, a solid electrolyte with a composition that does not contain expensive elements has also been developed, but it is known that the conductivity at room temperature is 4.9×10 -5 About S / cm, about 1 / 10 lower than lithium lanthanum zirconate compounds
In addition, regarding the solid electrolyte, the conductivity at low temperature is lower than the conductivity at room temperature, which is also a problem for practical use.

Method used

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  • Solid Electrolyte, Lithium Battery, Battery Pack, And Vehicle
  • Solid Electrolyte, Lithium Battery, Battery Pack, And Vehicle
  • Solid Electrolyte, Lithium Battery, Battery Pack, And Vehicle

Examples

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no. 1 Embodiment approach

[0024] The oxide contained in the solid electrolyte described in the embodiment is composed of the general formula Li 1+2x M1 2-x (Ca 1-y M2 y ) x (PO 4 ) 3 In the formula, M1 is at least one selected from Zr and Hf, and M2 is at least one selected from Sr and Ba. In addition, in the formula, x is in the range of 04 ) as a skeleton structure. The crystal structure belongs to rhombohedral structure, and the representative space group is R-3c. Furthermore, in the crystal structure, PO 4 Tetrahedra and MO 6 The octahedrons all share vertices with each other and form [M 2 (PO 4 ) 3 ] n- The chemical formula represents the skeleton structure. exist figure 1 In the skeleton structure of the rhombohedral crystal system shown in , four octahedra exist around one tetrahedron, and six tetrahedra exist around one octahedron. General NASICON type compounds are known to take only at high temperature figure 1 In the rhombohedral crystal structure shown in , strain occurs in ...

no. 2 Embodiment approach

[0037] The lithium battery according to the embodiment includes a positive electrode layer capable of intercalating and deintercalating lithium ions, a negative electrode layer capable of intercalating and deintercalating lithium ions, and a Li conductive layer capable of conducting lithium ions. At least one of these positive electrode layer, negative electrode layer, and Li conductive layer contains the solid electrolyte described in the first embodiment.

[0038] The positive electrode layer includes a positive electrode active material, and can be arranged on a current collector to constitute a positive electrode. The positive electrode active material will be described later. The negative electrode layer includes a negative electrode active material, and can be arranged on a current collector to constitute a negative electrode. Alternatively, the positive electrode layer is arranged on one surface of the current collector, and the negative electrode layer is arranged on ...

no. 3 Embodiment approach

[0112] According to a third embodiment, a battery pack is provided. This battery pack includes the lithium battery described in the second embodiment.

[0113] The battery pack according to the third embodiment may include one or more lithium batteries (single cells) described above in the second embodiment. The plurality of lithium batteries that can be included in the battery pack according to the third embodiment can be electrically connected in series, in parallel, or a combination of series and parallel. A plurality of batteries may be electrically connected to form a battery pack. The battery pack according to the third embodiment may include a plurality of assembled batteries.

[0114] In addition, the lithium battery (single battery) included in the battery pack may include figure 2 A lithium battery with a single-layer electrode body as shown in electrode body 10A, or it may also be a lithium battery comprising image 3 A lithium battery with a bipolar electrode ...

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Abstract

Embodiments relate to a solid electrolyte, a lithium battery, a battery pack, and a vehicle. The present invention relates to a solid electrolyte having a chemical stability of constituent elements and being capable of being reduced in cost and having high lithium ion conductivity at a temperature lower than room temperature and a lithium battery containing this solid electrolyte and excellent discharge rate at a low temperature, a battery pack containing the lighium battery, and a vehicle carrying the battery pack. According to one embodiment, there is provided a solid electrolyte including an oxide represented by General Formula Li1+2xM12-x(Ca1-yM2y)x(PO4)3. In the General Formula above, M1 is at least one selected from the group consisting of Zr and Hf. M2 is at least one selected fromthe group consisting of Sr and Ba. x satisfies 0<x<2. y satisfies 0<y<=1.

Description

technical field [0001] Embodiments of the present invention relate to solid electrolytes, lithium batteries, battery packs, and vehicles. Background technique [0002] In recent years, lithium-ion secondary batteries with high energy density have attracted great attention as stationary power sources for small electronic devices, hybrid vehicles, electric vehicles, and power storage. Among them, a lithium ion secondary battery using an inorganic solid electrolyte is expected to be a safe battery without fear of leakage of an organic electrolyte or gas generation. In addition, a lithium battery using a solid electrolyte is also less likely to generate side reactions other than the battery reaction compared to a battery using a liquid electrolyte, so a longer life can also be expected. Furthermore, in an all-solid-state battery using an inorganic solid electrolyte, since electrodes and an electrolyte are easily laminated to form a structure, manufacturing costs can be reduced....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/0525B60L11/18
CPCB60L50/50H01M10/0525H01M10/0562C01B25/45C01P2002/76C01P2002/77H01M2300/0091H01M4/485H01M2220/20H01M2300/0068Y02E60/10Y02T10/70Y02P20/133Y02P70/50B60L50/66H01M4/131H01M4/366H01M4/62H01M10/052H01M10/058H01M10/4257H01M50/20H01M4/483
Inventor 原田康宏草间知枝高见则雄吉间一臣
Owner KK TOSHIBA
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