# US 11,444,230 B2 · Thermoelectric conversion material and method of obtaining electrical power using thermoelectric conversion material

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- Number: US 11,444,230 B2
- Document ID: US11444230B2
- Status: Granted
- Kind: B2
- Application number: 17/117,187
- Filed: 2020-12-10
- Published: 2021-04-08
- Granted: 2022-09-13
- Earliest claimed: 2018-10-17
- Assignees: Panasonic Intellectual Property Management Co., Ltd.
- Applicants: Panasonic Intellectual Property Management Co., Ltd.
- Inventors: Hiromasa Tamaki; Tsutomu Kanno; Hiroki Sato
- Web page: https://patentgrep.com/patent/US11444230B2

## CPC

- H10N 10/853: comprising arsenic, antimony or bismuth (H10N10/852 takes precedence)
- C01B 33/00: Silicon; Compounds thereof ({C01B6/00,} C01B21/00, C01B23/00 take precedence; persilicates C01B15/14; carbides C01B32/956)
- H02N 11/00: Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means (by hydrostatic pressure F03B17/04; {by mechanical means F03G7/10;} by dynamo-electric means, {including arrangements of permanent magnets interacting with other permanent magnets,} H02K53/00)
- H10N 10/01: Manufacture or treatment
- H10N 10/10: operating with only the Peltier or Seebeck effects
- H10N 10/13: characterised by the heat-exchanging means at the junction
- H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- H02N: ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR

## Abstract

A thermoelectric conversion material has a composition represented by the chemical formula Li3-aBi1-bSib, in which the range of values a and b is: 0≤a≤0.0001, and −a+0.0003≤b≤0.023; 0.0001≤a<0.0003, and −a+0.0003≤b≤exp[−0.046×(ln(a))2−1.03×ln(a)−9.51]; or 0.0003≤a≤0.085, and 0<b≤exp[−0.046×(ln(a))2−1.03×ln(a)−9.51], and in which the thermoelectric conversion material has a BiF3-type crystal structure and has a p-type polarity.

## Claims

### Claim 1

A thermoelectric conversion material comprising a composition represented by the chemical formula Li3-aBi1-bSib, wherein:
the thermoelectric conversion material has a crystal structure same as BiF3, and has a p-type polarity, and
any one of the following formulas (I) to (III) is satisfied:
0≤a≤0.0001, and −a+0.0003≤b≤0.023 (I);
0.0001≤a<0.0003, and −a+0.0003≤b≤exp[−0.046×(ln(a))2−1.03×ln(a)−9.51] (II); and
0.0003≤a≤0.085, and 0≤b≤exp[−0.046×(ln(a))2−1.03×ln(a)−9.51] (III).

### Claim 2 (depends on 1)

The thermoelectric conversion material according to claim 1,
wherein a=0, and 0.0003≤b≤0.023.

### Claim 3

A method of obtaining electrical power using a thermoelectric conversion material, the method comprising:
applying a temperature difference to the thermoelectric conversion material to generate the electrical power, wherein:
the thermoelectric conversion material has a composition represented by the chemical formula Li3-aBi1-bSib, has a crystal structure same as BiF3, and has a p-type polarity, and
any one of the following formulas (I) to (III) is satisfied:
0≤a≤0.0001, and −a+0.0003≤b≤0.023 (I);
0.0001≤a<0.0003, and −a+0.0003≤b≤exp[−0.046×(ln(a))2−1.03×ln(a)−9.51] (II); and
0.0003≤a≤0.085, and 0≤b≤exp[−0.046×(ln(a))2−1.03×ln(a)−9.51] (III).