Garnet-type Li-ion conductive oxide

A garnet-type, lithium-ion technology, used in electrochemical generators, electrolyte immobilization/gelling, electrical components, etc., can solve the problems of high reactivity, low lithium metal potential, and no solid electrolyte, and achieve high Effects of ionic conductivity and high sintered density

Active Publication Date: 2016-09-28
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lithium metal has the lowest potential and high reactivity, so there is no applicable solid electrolyte composed of ceramic materials

Method used

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  • Garnet-type Li-ion conductive oxide
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  • Garnet-type Li-ion conductive oxide

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Experimental program
Comparison scheme
Effect test

Embodiment

[0129] The content of the present invention will be described more specifically with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples.

[0130] As Examples 1-21, the composition formula Li of the garnet-type lithium ion conductive oxide is x-2a-3b-4c-5d M1 a M2 b M3 c M4 d La 3 Zr 2 o 12 , M1, a, M2, b, M3, c, M4, and d are as described in Table 1. The raw materials corresponding to the respective elements were weighed and mixed. As a raw material, LiCO is used 3 、La(OH) 3 , ZrO 2 , MgCO 3 , CaCO 3 , SrCO 3 、BaCO 3 、Al 2 o 3 , Ga 2 o 3 , Y 2 o 3 、GeO 2 、 Ta 2 o 5 , Nb 2 o 5 . Mixing was performed using ethanol solvent and using a ball mill (120 rpm / zirconia ball) for 16 hours.

[0131] Then, the obtained slurry was separated and dried from ethanol and zirconia balls to obtain a mixed powder.

[0132] Next, the obtained mixed powder was placed in a MgO container, and calcined at 900° C....

Embodiment 35

[0156] Examples of all-solid lithium secondary batteries are shown below, but the present invention is not limited to these examples. In addition, "part" means a mass part unless otherwise indicated.

[0157] (Production of positive electrode active material and negative electrode active material)

[0158] As the positive electrode active material and the negative electrode active material, Li 3 V 2 (PO 4 ) 3 . As the production method, with Li 2 CO 3 , V 2 o 5 , NH 4 h 2 PO 4 As the starting material, it was wet-mixed with a ball mill for 16 hours, and after dehydration and drying, the obtained powder was calcined at 850° C. in nitrogen-hydrogen mixed gas for two hours. The calcined product is wet pulverized by a ball mill, and then dehydrated and dried to obtain a powder. Using an X-ray diffraction device, it was confirmed that the structure of the produced powder was Li 3 V 2 (PO 4 ) 3 .

[0159] (Preparation of positive electrode active material slurry an...

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Abstract

The invention provides a garnet-type Li-ion conductive oxide, that is, Li7La3Zr2O12, and the garnet-type Li-ion conductive oxide has relatively high sintered density and high ionic conductivity. The garnet-type Li-ion conductive oxide is formed by Li, La, Zr, and O. The garnet-type Li-ion conductive oxide is characterized by containing at least one element respresented by M1, M2, M3, and M4. The M1, M2, M3, and M4 represent the following elements. M 1 is more than one element selected from of Mg, Ca, Sr, Ba, and Zn. M2 is more than one element selected from Al, Ga, Co, Fe, and Y. M3 is more than one element selected from Sn and Ge. M4 is more than one element selected from Ta and Nb.

Description

technical field [0001] The present invention relates to a garnet type lithium ion conductive oxide. Background technique [0002] In recent years, with the development of portable devices such as personal computers and mobile phones, the demand for secondary batteries as their power sources has been greatly expanded. In secondary batteries used in such applications, liquid electrolytes (electrolyte solutions) such as organic solvents are widely used as a medium for moving ions. In a battery using such an electrolytic solution, a problem may arise in the thermal stability of the electrolytic solution. [0003] Therefore, from the viewpoint of ensuring essential safety, development of all-solid secondary batteries and the like in which solid electrolytes are used instead of liquid electrolytes and other battery elements are all made of solids has been progressing. This all-solid secondary battery is a ceramic after the electrolyte is sintered, so it has the advantages of hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/0525
CPCH01M10/0525H01M10/0562H01M2300/0085Y02E60/10
Inventor 田中祯一塚田岳夫益子泰辅
Owner TDK CORPARATION
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