# Demonstration of ultrahigh thermoelectric efficiency of ∼7.3% in Mg3Sb2/MgAgSb module for low-temperature energy harvesting

https://mdr.nims.go.jp/datasets/7c2d2ff8-80c7-4453-b24e-ecaa00a0c4e3

## File

- [Joule+SI-Demonstration of ultrahigh thermoelectric efficiency of 7.3- in Mg3Sb2MgAgSb module for low-temperature energy harvesting.pdf](https://mdr.nims.go.jp/filesets/01156903-6d59-4137-b61d-7f224a31029d/download) ([Detail](https://mdr.nims.go.jp/filesets/01156903-6d59-4137-b61d-7f224a31029d.md))

## Id

7c2d2ff8-80c7-4453-b24e-ecaa00a0c4e3

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-11-23T06:17:07.710423Z

## Updated at

2024-11-25T07:30:22.882959Z

## Published at

2024-11-25T07:30:23.089353Z

## Doi



## First published url

https://doi.org/10.1016/j.joule.2021.03.017

## Date published

2021-04-19

## Recorded date published

2021-5

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Demonstration of ultrahigh thermoelectric efficiency of ∼7.3% in Mg3Sb2/MgAgSb
    module for low-temperature energy harvesting
  title_type: original
  lang: en

## Description

- description: Thermoelectric harvesting of low-temperature waste heat offers great
    opportunity for sustainable energy production. However, the investigations of
    related thermoelectric materials and modules remain sluggish. Herein, we reported
    a great advance in the n-type Mg3Sb1.5Bi0.5 system by minor Cu addition, ranging
    from material design (high dimensionless figure of merit zT) to module development
    (high conversion efficiency). Some Cu atoms, preferentially occupying interstitial
    sites within the Mg3Sb2 lattice, significantly modified phonon modes via filling
    in the phonon gap and increased anharmonic phonon scattering, thereby leading
    to the anomalously low thermal conductivity. Simultaneously, the detrimental behavior
    of thermally-activated electrical conductivity was completely eliminated through
    the grain boundary complexion engineering as a result of the Mg-Cu binary eutectic
    reaction. These two critical roles contributed to the remarkable improvement of
    zT. Based on this newly developed high-performance material coupled with p-type
    -MgAgSb based material, a high-performance thermoelectric module, rivaling long-time
    champion Bi2Te3, was for the first time fabricated, demonstrating a record-high
    conversion efficiency ~ 7.3% at the hot-side temperature of 593 K. These results
    highlight the importance of both atomic arrangement and grain boundary complexions
    in optimization of thermoelectric properties and also pave the way for low-temperature
    thermoelectric harvesting.
  description_type: abstract
  lang: und

## Creator

- name: Zihang Liu
  role: author
  orcid: https://orcid.org/0000-0002-2040-1632
  organization: National Institute for Materials Science
- name: Naoki Sato
  role: author
  orcid: https://orcid.org/0000-0002-6429-0591
  organization: National Institute for Materials Science
- name: Weihong Gao
  role: author
  orcid: https://orcid.org/0000-0003-3656-4206
  organization: National Institute for Materials Science
- name: Kunio Yubuta
  role: author
- name: Naoyuki Kawamoto
  role: author
  orcid: https://orcid.org/0000-0002-2022-3987
  organization: National Institute for Materials Science
- name: Masanori Mitome
  role: author
  orcid: https://orcid.org/0000-0003-1192-9838
  organization: National Institute for Materials Science
- name: Keiji Kurashima
  role: author
  organization: National Institute for Materials Science
- name: Yuka Owada
  role: author
- name: Kazuo Nagase
  role: author
- name: Chul-Ho Lee
  role: author
- name: Jangho Yi
  role: author
  orcid: https://orcid.org/0000-0002-9458-8655
  organization: National Institute for Materials Science
- name: Koichi Tsuchiya
  role: author
  orcid: https://orcid.org/0000-0003-0267-2727
  organization: National Institute for Materials Science
- name: Takao Mori
  role: author
  orcid: https://orcid.org/0000-0003-2682-1846
  organization: National Institute for Materials Science

## Contact agent



## Publisher

organization: Elsevier BV

## Managing organization



## Keyword

- subject: thermoelectric
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by-nc-nd/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Joule
  issn: '25424351'
  volume: '5'
  issue: '5'
  start_page: 1196
  end_page: 1208

## Conference



## Related item



## Funding

- funder_name: JSPS
- identifier: JPMJMI19A1
  funder_name: JST

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



## Software



## Custom property



## Fileset

- id: '01156903-6d59-4137-b61d-7f224a31029d'
  filename: Joule+SI-Demonstration of ultrahigh thermoelectric efficiency of 7.3-
    in Mg3Sb2MgAgSb module for low-temperature energy harvesting.pdf
  content_type: application/pdf
  size: 6578121
  md5: a2618f3451a47b343aa323a1f013f3dc

## Thumbnail

fileset_id: '01156903-6d59-4137-b61d-7f224a31029d'
filename: Joule+SI-Demonstration of ultrahigh thermoelectric efficiency of 7.3- in
  Mg3Sb2MgAgSb module for low-temperature energy harvesting.pdf