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Solid electrolyte and all-solid lithium-ion secondary battery

A solid electrolyte and secondary battery technology, applied in non-aqueous electrolyte batteries, secondary batteries, electrolytes, etc., can solve the problems of decreased ion conductivity and low ion conductivity

Active Publication Date: 2019-11-15
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, LiZr 2 (PO 4 ) 3 There are problems such as changing to a crystal structure with low ion conductivity at a temperature below 60°C, and decreasing ion conductivity.

Method used

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  • Solid electrolyte and all-solid lithium-ion secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0142] In Example 1-1, measure LiZr with nickel 2 (PO 4 ) 3 Part of the zirconium is substituted by Li 1+0.5x Ni 0.5 Zr 1.5 (PO 4 ) 3 characteristic changes. The result is Figure 6A ~ Figure 6D . exist Figures 6A-6D middle, Figure 6A It is a figure which shows the change of the potential when the Li number of each structural formula changes. Figure 6B It is a graph showing the size of the HOMO-LUMO band gap of the solid electrolyte with respect to the Li number of each structural formula. Figure 6C It is a graph showing the change in the valence state of zirconium and nickel constituting the solid electrolyte when the Li number of each structural formula changes. Figure 6D It is a graph showing the change in the valence state of oxygen constituting the solid electrolyte when the Li number of each structural formula changes.

[0143] Such as Figure 6B As shown, even when a part of zirconium is replaced by nickel, the solid electrolyte maintains electronic i...

Embodiment 1-2

[0145] In Example 1-2, measure LiZr with vanadium 2 (PO 4 ) 3 Part of the zirconium is substituted by Li 1+0.5x V 0.5 Zr 1.5 (PO 4 ) 3 characteristic changes. The result is Figure 7A ~ Figure 7D . exist Figures 7A-7D middle, Figure 7A It is a figure which shows the change of the potential when the Li number of each structural formula changes. Figure 7B It is a graph showing the size of the HOMO-LUMO band gap of the solid electrolyte with respect to the Li number of each structural formula. Figure 7C It is a graph showing changes in the valence states of zirconium and vanadium constituting the solid electrolyte when the Li number of each structural formula changes. Figure 7D It is a graph showing the change in the valence state of oxygen constituting the solid electrolyte when the Li number changes.

[0146] Such as Figure 7B As shown, even when a part of zirconium was substituted with vanadium, the solid electrolyte maintained electronic insulation in a wi...

Embodiment 1-3

[0148] In Examples 1-3, measure the LiZr 2 (PO 4 ) 3 Part of the zirconium is replaced by tantalum after the Li 1+0.5x Ta 0.5 Zr 1.5 (PO 4 ) 3 characteristic changes. The result is Figure 8A ~ Figure 8D . exist Figures 8A-8D middle, Figure 8A It is a figure which shows the change of the potential when the Li number of each structural formula changes. Figure 8B It is a graph showing the size of the HOMO-LUMO band gap of the solid electrolyte with respect to the Li number of each structural formula. Figure 8C It is a graph showing the change in the valence state of zirconium and tantalum constituting the solid electrolyte when the Li number of each structural formula changes. Figure 8D It is a graph showing the change in the valence state of oxygen constituting the solid electrolyte when the Li number of each structural formula changes.

[0149] Such as Figure 8B As shown, even when a part of zirconium is replaced with tantalum, the solid electrolyte maintai...

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Abstract

This solid electrolyte is a zirconium phosphate-based solid electrolyte wherein a portion of the phosphorus or zirconium constituting the solid electrolyte is substituted with an element capable of changing valency.

Description

technical field [0001] The invention relates to a solid electrolyte and an all-solid lithium ion secondary battery. [0002] This application claims priority based on Japanese Patent Application No. 2017-066604 filed in Japan on March 30, 2017, the content of which is incorporated herein. Background technique [0003] As electrolytes for batteries, research is underway to use flame-retardant polymer electrolytes or ionic liquids. However, all electrolytes contain organic substances. Therefore, in batteries using these materials, it is difficult to eliminate anxiety about liquid leakage, liquid depletion, and the like. [0004] On the other hand, an all-solid lithium ion secondary battery using ceramics as an electrolyte is essentially nonflammable and highly safe, and worries about liquid leakage and depletion of liquid can be eliminated. Therefore, all-solid lithium ion secondary batteries have attracted attention in recent years. [0005] Various materials have been re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562C01B25/45H01B1/06H01M10/052
CPCH01M10/0562C01B25/45H01B1/06H01M2300/0077H01M10/052Y02E60/10H01M10/0525
Inventor 佐佐木孝上野哲也矶道岳步
Owner TDK CORPARATION
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