Silicate compounds as solid Li-ion conductors

Patent metadata

Field	Value
Publication number	US-10714788-B2
Application number	US-201816013495-A
Country	US
Kind code	B2
Filing date	Jun 20, 2018
Priority date	Jun 20, 2018
Publication date	Jul 14, 2020
Grant date	Jul 14, 2020

Abstract

Solid-state lithium ion electrolytes of lithium silicate based composites are provided which contain an anionic framework capable of conducting lithium ions. An activation energy for lithium ion migration in the solid state lithium ion electrolytes is 0.5 eV or less and room temperature conductivities are greater than 10−5 S/cm. Composites of specific formulae are provided and methods to alter the composite materials with inclusion of aliovalent ions shown. Lithium batteries containing the composite lithium ion electrolytes are also provided.

First claim

The invention claimed is:

1. 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 a composite material of formula (I):
Li y (M1) x1 Si 2-x2 (M2) x2 O 7   (I)

wherein
x1 is a number from 0 to 6 inclusive of 0 and 6,
x2 is a number from 0 to 2, inclusive of 0 and 2, and
y is a value such that the composite of formula (I) is charge neutral,
M1 is at least one element selected from the group of elements consisting of a group 1 element, a group 2 element and a group 12 element, and
M2 is at least one element selected from the group of elements consisting of a group 13 element, a group 14 element, and a group 15 element.

2. 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 a composite material of formula (II):
Li y (M1) x1 Si 2-x2 (M2) x2 Pb 1-x3 (M3) x3 O 7   (II)

wherein
x1 is a number from 0 to 10 inclusive of 0 and 10,
x2 is a number from 0 to 2, inclusive of 0 and 2,
x3 is a number from 0 to 1, inclusive of 0 and 1, and
y is a value such that the composite of formula (II) is charge neutral,
M1 is at least one element selected from the group of elements consisting of a group 1 element a group 2 element and a group 12 element,
M2 is at least one element selected from the group of elements consisting of a group 13 element, a group 14 element, and a group 15 element, and
M3 is at least one element selected from a group 2 element, a group 12 element, a group 13 element, a group 14 element and a group 15 element.

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 a composite material of formula (III):
Li y (M1) x1 Si 2-x2 (M2) x2 Al 1-x3 (M3) x3 O 7   (III)

wherein
x1 is from 0 to 1, inclusive of 0 and 1,
x2 is from 0 to 1, inclusive of 0 and 1,
x3 is from 0 to 1, inclusive of 0 and 1,
y is a value such that the composite of formula (III) is charge neutral,
M1 is at least one element selected from a group 1 element, a group 2 element and a group 12 element,
M2 is at least one element selected from a group 13 element, a group 14 element, and a group 15 element, and
M3 is at least one element selected from a group 3 element, a group 4 element, a group 13 element, a group 14 element and a group 15 element.

4. 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 a composite material of formula (IV):
Li y (M1) x1 Si 2-x2 (M2) x2 Be 1-x2 (M3) x3 O 7   (IV)

wherein x1 is from 0 to 2, inclusive of 0 and 2,
x2 is from 0 to 1, inclusive of 0 and 1,
x3 is from 0 to 1, inclusive of 0 and 1,
y is a value such that the composite of formula (IV) is charge neutral,
M1 is at least one element selected from the group of elements consisting of a group 1 element, a group 2 element and a group 12 element,
M2 is at least one element selected from a group 13 element, a group 14 element, and a group 15 element, and
M3 is at least one element selected from a group 1 element, a group 2 element, a group 12 element and a group 13 element.

5. 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 a composite material of formula (V):
Li 2.4 Zn 4.4 Si 5.2 O 16   (V).

Assignees

• Univ Maryland
• Toyota Eng & Mfg North America

Inventors

• Mo Yifei
• He Xingfeng
• Ling Chen
• Zhang Ying

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• C01B33/26 Primary

  Aluminium-containing silicates {, i.e. silico-aluminates} · CPC title

• H01M10/0562 Primary

  Solid materials · CPC title

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• H01M2300/0074

  Ion conductive at high temperature · CPC title