Enhanced Thermoelectric Performance of Zintl Phase Ca9Zn4+ xSb9 by Beneficial Disorder on the Selective Cationic Site

Chen Chen; Wenhua Xue; Xiaofang Li; Yucheng Lan; Zongwei Zhang; Xinyu Wang; Fan Zhang; Honghao Yao; Shan Li; Jiehe Sui; Peide Han; Xingjun Liu; Feng Cao; Yumei Wang; Qian Zhang

doi:10.1021/acsami.9b12748

Enhanced Thermoelectric Performance of Zintl Phase Ca₉Zn_{4+ x}Sb₉ by Beneficial Disorder on the Selective Cationic Site

Chen Chen, Wenhua Xue, Xiaofang Li, Yucheng Lan, Zongwei Zhang, Xinyu Wang, Fan Zhang, Honghao Yao, Shan Li, Jiehe Sui, Peide Han, Xingjun Liu, Feng Cao, Yumei Wang, Qian Zhang

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

Zintl phase compounds Ca₉Zn_4+xSb₉ have promising thermoelectric properties due to their complex crystal structure and tunable interstitial Zn. In this work, we prepared nominal Ca₉Zn_4+xSb₉ (x = 0.5, 0.6, 0.7, and 0.8) using ball milling and hot pressing. Further decreased lattice thermal conductivity was obtained by isoelectronic substitution of Eu on the selective Ca site, which is farther away from the framework of [Zn_4+xSb₉]^Î´- for the smaller disturbance of carrier transport. Together with the intensively enhanced carrier mobility, which is attributed to the decreased effective mass and the increased interstitial Zn by inclusion of Eu, an increased peak ZT value to &tild;1.05 at 773 K and an enhanced average ZT value to &tild;0.73 from 300 to 823 K were achieved in Ca_6.75Eu_2.25Zn_4.7Sb₉

Original language	English
Pages (from-to)	37741-37747
Number of pages	7
Journal	ACS Applied Materials and Interfaces
Volume	11
Issue number	41
DOIs	https://doi.org/10.1021/acsami.9b12748
State	Published - 16 Oct 2019
Externally published	Yes

Keywords

CaZnSb
mobility
thermal conductivity
thermoelectric
Zintl phase

Access to Document

10.1021/acsami.9b12748

Cite this

@article{235a5ea799f447339f584a52e8d34547,

title = "Enhanced Thermoelectric Performance of Zintl Phase Ca9Zn4+ xSb9 by Beneficial Disorder on the Selective Cationic Site",

abstract = "Zintl phase compounds Ca9Zn4+xSb9 have promising thermoelectric properties due to their complex crystal structure and tunable interstitial Zn. In this work, we prepared nominal Ca9Zn4+xSb9 (x = 0.5, 0.6, 0.7, and 0.8) using ball milling and hot pressing. Further decreased lattice thermal conductivity was obtained by isoelectronic substitution of Eu on the selective Ca site, which is farther away from the framework of [Zn4+xSb9]{\^I}´- for the smaller disturbance of carrier transport. Together with the intensively enhanced carrier mobility, which is attributed to the decreased effective mass and the increased interstitial Zn by inclusion of Eu, an increased peak ZT value to &tild;1.05 at 773 K and an enhanced average ZT value to &tild;0.73 from 300 to 823 K were achieved in Ca6.75Eu2.25Zn4.7Sb9",

keywords = "CaZnSb, mobility, thermal conductivity, thermoelectric, Zintl phase",

author = "Chen Chen and Wenhua Xue and Xiaofang Li and Yucheng Lan and Zongwei Zhang and Xinyu Wang and Fan Zhang and Honghao Yao and Shan Li and Jiehe Sui and Peide Han and Xingjun Liu and Feng Cao and Yumei Wang and Qian Zhang",

note = "Publisher Copyright: Copyright {\textcopyright} 2019 American Chemical Society.",

year = "2019",

month = oct,

day = "16",

doi = "10.1021/acsami.9b12748",

language = "英语",

volume = "11",

pages = "37741--37747",

journal = "ACS Applied Materials and Interfaces",

issn = "1944-8244",

publisher = "American Chemical Society",

number = "41",

}

TY - JOUR

T1 - Enhanced Thermoelectric Performance of Zintl Phase Ca9Zn4+ xSb9 by Beneficial Disorder on the Selective Cationic Site

AU - Chen, Chen

AU - Xue, Wenhua

AU - Li, Xiaofang

AU - Lan, Yucheng

AU - Zhang, Zongwei

AU - Wang, Xinyu

AU - Zhang, Fan

AU - Yao, Honghao

AU - Li, Shan

AU - Sui, Jiehe

AU - Han, Peide

AU - Liu, Xingjun

AU - Cao, Feng

AU - Wang, Yumei

AU - Zhang, Qian

PY - 2019/10/16

Y1 - 2019/10/16

N2 - Zintl phase compounds Ca9Zn4+xSb9 have promising thermoelectric properties due to their complex crystal structure and tunable interstitial Zn. In this work, we prepared nominal Ca9Zn4+xSb9 (x = 0.5, 0.6, 0.7, and 0.8) using ball milling and hot pressing. Further decreased lattice thermal conductivity was obtained by isoelectronic substitution of Eu on the selective Ca site, which is farther away from the framework of [Zn4+xSb9]Î´- for the smaller disturbance of carrier transport. Together with the intensively enhanced carrier mobility, which is attributed to the decreased effective mass and the increased interstitial Zn by inclusion of Eu, an increased peak ZT value to &tild;1.05 at 773 K and an enhanced average ZT value to &tild;0.73 from 300 to 823 K were achieved in Ca6.75Eu2.25Zn4.7Sb9

AB - Zintl phase compounds Ca9Zn4+xSb9 have promising thermoelectric properties due to their complex crystal structure and tunable interstitial Zn. In this work, we prepared nominal Ca9Zn4+xSb9 (x = 0.5, 0.6, 0.7, and 0.8) using ball milling and hot pressing. Further decreased lattice thermal conductivity was obtained by isoelectronic substitution of Eu on the selective Ca site, which is farther away from the framework of [Zn4+xSb9]Î´- for the smaller disturbance of carrier transport. Together with the intensively enhanced carrier mobility, which is attributed to the decreased effective mass and the increased interstitial Zn by inclusion of Eu, an increased peak ZT value to &tild;1.05 at 773 K and an enhanced average ZT value to &tild;0.73 from 300 to 823 K were achieved in Ca6.75Eu2.25Zn4.7Sb9

KW - CaZnSb

KW - mobility

KW - thermal conductivity

KW - thermoelectric

KW - Zintl phase

UR - http://www.scopus.com/inward/record.url?scp=85073147224&partnerID=8YFLogxK

U2 - 10.1021/acsami.9b12748

DO - 10.1021/acsami.9b12748

M3 - 文章

C2 - 31553558

AN - SCOPUS:85073147224

SN - 1944-8244

VL - 11

SP - 37741

EP - 37747

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

IS - 41

ER -

Enhanced Thermoelectric Performance of Zintl Phase Ca₉Zn_{4+ x}Sb₉ by Beneficial Disorder on the Selective Cationic Site

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this