Compounds with mixed anions as solid Li-ion conductors

• US 10,511,054 B2
• Filed: 11/07/2017
• Issued: 12/17/2019
• Est. Priority Date: 11/07/2017
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Motor Engineering & Manufacturing North America Incorporated (Toyota Motor Corporation)
• Inventors: Ling, Chen, Zhang, Ying
• Primary Examiner(s): Arciero, Adam A
• Application Number:
  US15/805,672
• Publication Number:
  US 20190140310A1
• Time in Patent Office: 770 Days
• CPC Class Codes: C01B 11/20 Oxygen compounds of bromine
• CPC Class Codes: C01B 21/083 containing one or more halogen atoms
• CPC Class Codes: C01P 2006/40 Electric properties
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/0562 Solid materials
• CPC Class Codes: H01M 2300/0068 inorganic
• CPC Class Codes: H01M 2300/0071 Oxides
• CPC Class Codes: H01M 2300/008 Halides
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

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.

Claims

1. A solid-state lithium ion electrolyte, comprising:

a composite material of formula (I);

in an anionic framework capable of conducting lithium ions;

Li_7-nxM_xBr₃O₂ 

 

(I)

wherein

M is a +2 or +3 cation,

0<

x≤

0.7,

n is 2 or 3,

a mole % content of M is greater than 0 and less than or equal to 10 mole % based on total moles of lithium and M, and

an activation energy for lithium ion migration in the solid state lithium ion electrolyte is 0.5 eV or less.

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.