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Compound, solid electrolyte including the same, electrochemical cell including the same, and method for preparing solid ion conductor

A compound and cation technology, applied in the field of manufacturing the solid ion conductor, can solve the problems that lithium metal is not stable enough, lithium ion conductivity is low, etc.

Pending Publication Date: 2021-03-30
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Available solid electrolyte materials are not sufficiently stable for lithium metal
In addition, the Li-ion conductivity of available solid electrolytes is lower than that of liquid alternatives

Method used

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  • Compound, solid electrolyte including the same, electrochemical cell including the same, and method for preparing solid ion conductor
  • Compound, solid electrolyte including the same, electrochemical cell including the same, and method for preparing solid ion conductor
  • Compound, solid electrolyte including the same, electrochemical cell including the same, and method for preparing solid ion conductor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0231] Embodiment 1: preparation (Li 5.72 Cu 0.03 )PS 4.75 Cl 1.25 Methods

[0232] In a glove box with an Ar atmosphere, (Li 5.72 Cu 0.03 )PS 4.75 Cl 1.25 Desired chemical composition of : Li as lithium precursor 2 S, P as a phosphorus precursor 2 S 5 , LiCl as a chlorine precursor, and Cu as a copper precursor 2 S was combined in a stoichiometric ratio, and ground and mixed at 100 rpm for 1 hour and then at 800 rpm for 30 minutes in a planetary ball mill with zirconia (YSZ) balls and an Ar atmosphere, thereby obtaining the above mixture. The obtained mixture was pressed with uniaxial pressure to prepare a disc having a thickness of about 10 mm and a diameter of about 13 mm. The prepared disc was covered with gold foil, placed in a carbon crucible, and the carbon crucible was vacuum-sealed using a quartz glass tube. The vacuum-sealed wafer was heated from room temperature to 500°C at 1.0°C / min using an electric furnace, then heat-treated at 500°C for 12 hours, and...

Embodiment 2

[0233] Embodiment 2: (Li 5.69 Cu 0.06 )PS 4.75 Cl 1.25 preparation of

[0234] A solid ion conductor compound was prepared in the same manner as in Example 1, except that the stoichiometric mixing ratio of the starting materials was changed to obtain (Li 5.69 Cu 0.06 )PS 4.75 Cl 1.25 expected composition.

[0235] The composition of the prepared solid ion conductor compound is (Li 5.69 Cu 0.06 )PS 4.75 Cl 1.25 (Alternative cation ratio: 0.01).

Embodiment 3

[0236] Embodiment 3: (Li 5.63 Cu 0.12 )PS 4.75 Cl 1.25 preparation of

[0237] A solid ion conductor compound was prepared in the same manner as in Example 1, except that the stoichiometric mixing ratio of the starting materials was changed to obtain (Li 5.63 Cu 0.12 )PS 4.75 Cl 1.25 expected composition.

[0238] The composition of the prepared solid ion conductor compound is (Li 5.63 Cu 0.12 )PS 4.75 Cl 1.25 (Alternative cation ratio: 0.02).

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Abstract

The present invention relates to a compound, a solid electrolyte comprising the same, an electrochemical cell comprising the same, and a method for preparing a solid ion conductor. The compound is represented by Formula 1 and has a argyrodite-type crystal structure, wherein M1 is at least one element of Group 2 or Group 11 of the periodic table, M2 is at least one metal element of Group 1 of the periodic table other than Li, M3 is at least one element of Group 17 of the periodic table, and 4<=a<=8, 0<x <0.5, 0 <=w<0.5, 3<=y<=7, and 0<=7<=2, Formula 1 LiaM1xM2wPSyM3z.

Description

[0001] Cross References to Related Applications [0002] This application claims Korean Patent Application No. 10-2019-0119828 filed on September 27, 2019 at the Korean Intellectual Property Office and Korean Patent Application No. 10-2020 filed on September 8, 2020 at the Korean Intellectual Property Office - The priority and interest of 0114856, and all interests arising therefrom, the contents of both of which are incorporated herein by reference in their entirety. technical field [0003] The present disclosure relates to solid ionic conductors, solid electrolytes including the solid ionic conductors, lithium batteries including the solid ionic conductors, and methods of making the solid ionic conductors. Background technique [0004] All solid lithium batteries contain a solid electrolyte. All solid lithium batteries do not contain flammable organic solvents, and thus have excellent stability. [0005] Available solid electrolyte materials are not sufficiently stable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/46H01M10/052H01M10/0562C01B25/08C01G3/00
CPCC30B29/46H01M10/0562H01M10/052C01B25/08C01B25/088C01G3/006H01M2300/0068C01B25/14H01M10/0525H01M4/382H01M4/405H01M4/625H01M4/626Y02E60/10Y02P70/50C01P2002/30C01P2006/40H01M4/0471H01M4/134
Inventor 李锡守金素妍金泫锡
Owner SAMSUNG SDI CO LTD
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