Compounds with mixed anions as solid Li-ion conductors

Patent metadata

Field	Value
Publication number	US-11088394-B2
Application number	US-201916454373-A
Country	US
Kind code	B2
Filing date	Jun 27, 2019
Priority date	Nov 7, 2017
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

A solid-state lithium ion electrolyte is provided which contains a composite material having at least 94 mole % lithium ions as cation component and multiple anions in an anionic framework capable of conducting lithium ions. An activation energy for lithium ion migration in the solid state lithium ion electrolyte is 0.5 eV or less. Composites of specific formulae are provided. A lithium battery containing the composite lithium ion electrolyte is also provided.

First claim

The invention claimed is:

1. A solid-state lithium ion electrolyte, comprising:
a composite material having lithium ions and a dopant cation M as cation component; and multiple anions;
in an anionic framework capable of conducting lithium ions;
wherein
the composite material is at least one selected from the group of formulae consisting of (II), (III), (IV), (V) and (VI),
a mole % content of the dopant cation is from 0 to 10 mole % based on total moles of lithium and the dopant cation, and
an activation energy for lithium ion migration in the solid state lithium ion electrolyte is 0.5 eV or less,
Li 10-ny M y N 3 Br  (II)

wherein
M is cation of n+ charge,
y is a number from 0 to 1.0, and
n is 2 or 3;
Li 5-nz M z NCl 2   (III)

wherein M is cation of n+ charge,
z is a number from 0 to 0.5, and
n is 2 or 3,
Li 4-nw M w NCl  (IV)

wherein M is cation of n+ charge,
w is a number from 0 to 0.4, and
n is 2 or 3,
Li 6-nt M t NBr 3   (V)

wherein M is cation of n+ charge,
t is a number from greater than 0 to 0.6, and
n is 2 or 3 and
Li 6-ns M s NI 3   (VI)

wherein M is cation of n+ charge,
s is a number from 0 to 0.6, and
n is 2 or 3.

2. The solid-state lithium electrolyte according to claim 1 wherein a lithium ion (Li + ) conductivity of the solid state lithium ion electrolyte is at least 10 −6 S/cm at room temperature.

3. A solid state lithium battery, comprising:
an anode;
a cathode; and
a solid state lithium ion electrolyte located between the anode and the cathode;
wherein
the solid state lithium ion electrolyte comprises the composite material of claim 1 .

Assignees

• Toyota Eng & Mfg North America

Inventors

• Ling Chen
• Zhang Ying

Classifications

• C01P2006/40

  Electric properties · CPC title

• H01M10/0562 Primary

  Solid materials · CPC title

• C01B21/083 Primary

  containing one or more halogen atoms · CPC title

• H01M2300/0071

  Oxides · CPC title

• H01M2300/008

  Halides · CPC title