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Compound, solid electrolyte, electrochemical cell, method for preparing compound, and protected positive electrode active material

A compound, oxidation number technology, applied in the field of solid ion conductors, can solve the problem of low lithium ion conductivity

Pending Publication Date: 2021-05-11
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the lithium-ion conductivity of solid electrolytes is lower than that of liquid alternatives

Method used

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  • Compound, solid electrolyte, electrochemical cell, method for preparing compound, and protected positive electrode active material
  • Compound, solid electrolyte, electrochemical cell, method for preparing compound, and protected positive electrode active material
  • Compound, solid electrolyte, electrochemical cell, method for preparing compound, and protected positive electrode active material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0234] Embodiment 1: (Li 5.69 Cu 0.06 )P(S 4.70 (SO 4 ) 0.05 ) Cl 1.25 preparation of

[0235] In a glove box with an Ar atmosphere, the Li 2 S, P as a precursor of phosphorus (P) 2 S 5 , LiCl as a chlorine (Cl) precursor, Cu as a copper (Cu) precursor 2 S, and as SO 4 Precursor Li 2 SO 4 to obtain (Li 5.69 Cu 0.06 )P(S 4.70 (SO 4 ) 0.05 ) Cl 1.25 The stoichiometric ratio of the desired composition was mixed, and the resultant was pulverized and mixed in an Ar atmosphere at 100 rpm for 1 hour in a planetary ball mill including zirconia (YSZ) balls, and then pulverized and mixed at 800 rpm for 30 minutes to obtain a mixture. The obtained mixture was pressed by uniaxial pressure to prepare a disc having a thickness of about 10 mm and a diameter of about 13 mm. The wafer thus obtained was covered with a gold film and placed in a carbon furnace, and the carbon furnace was vacuum-sealed by using a quartz glass tube. The temperature of the vacuum-sealed wafer was ...

Embodiment 2

[0237] Embodiment 2: ((Li 5.69+b Cu 0.06 )P(S 4.75+b-a (SO 4 ) a )(Cl 1.25-b (SO 4 ) b ), (SO 4 ) a+b =(SO 4 ) 0.15 , (where 0.05

[0238] A solid ion conductor compound was prepared in the same manner as in Example 1, except that the stoichiometric ratio of the starting materials was changed to satisfy (Li 5.69+b Cu 0.06 )P(S 4.75+b-a (SO 4 ) a )(Cl 1.25-b (SO 4 ) b ) composition.

[0239] Such as Figure 1B As shown in , due to the re-precipitation of some Cl of the composition in the form of LiCl, a solid ion conductor compound of the following composition was obtained.

[0240] The composition of the obtained solid ion conductor compound is (Li 5.69+b Cu 0.06 )P(S 4.75+b-a (SO 4 ) a )(Cl1.25-b (SO 4 ) b ), (SO 4 ) a+b =(SO 4 ) 0.15 , (0.05

Embodiment 3

[0241] Embodiment 3: (Li 5.72 Cu 0.03 )P(S 4.725 (SO 4 ) 0.025 ) Cl 1.25 preparation of

[0242] A solid ion conductor compound was prepared in the same manner as in Example 1, except that the stoichiometric ratio of the starting materials was changed to satisfy (Li 5.72 Cu 0.03 )P(S 4.725 (SO 4 ) 0.025 ) Cl 1.25 expected composition.

[0243] The composition of described solid ion conductor compound is (Li 5.72 Cu 0.03 )PS 4.725 (SO 4 ) 0.025 Cl 1.25 (where the ratio of the substituted cation (Cu) is 0.005, and the substituted anion (SO 4 ) with a ratio of 0.005).

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Abstract

The invention relates to a compound, a solid electrolyte, an electrochemical cell, a method for preparing the compound, and a protected positive electrode active material. The compound is represented by Formula 1 and has an argyrodite-type crystal structure. In Formula 1, M1 is at least one metal element of Group 1 to Group 15 of the periodic table except Li, M2 is SOn, and M3 is at least one element of Group 17 of the periodic table; and 4 < = x < = 8, 0 < = v< 1, 3 < = y < = 7, 0<w<2; 0 < = z < = 2, and 1.5 < = n < = 5. Formula 1: Li<x> M1<v> PS<y> M2<w> M3 .

Description

[0001] Cross References to Related Applications [0002] This application claims Korean Patent Application No. 10-2019-0138765 filed with the Korean Intellectual Property Office on November 1, 2019 and Korean Patent Application No. 10-2020-0115523 filed with the Korean Intellectual Property Office on September 9, 2020 The priority and interest of, and all interests arising therefrom, the contents of which are hereby incorporated 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 include a solid electrolyte. All-solid batteries can avoid the use of flammable organic solvents, and thus can provide improved safety and stability. [0005] Solid electrolyte materials are not sufficiently stable wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/00C01B25/14H01M10/052H01M10/0562
CPCC01G3/006C01B25/14H01M10/0562H01M10/052C01P2002/72C01P2006/40H01M2300/0068H01M10/0525H01M10/4235H01M4/134H01M2004/027Y02E60/10Y02P70/50C01P2002/30H01M4/366H01M4/587H01M4/62H01M10/0585
Inventor 李锡守金泫锡金素妍
Owner SAMSUNG SDI CO LTD
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