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The effect of reduced graphene oxide on microstructure and thermoelectric properties of Nb-doped A-site-deficient SrTiO3 ceramics
Wu, Cao; Li, Jia; Fan, Yuchi; Xing, Juanjuan; Gu, Hui; Zhou, Zhenxing; Lu, Xiaofang; Zhang, Qihao; Wang, Lianjun; Jiang, Wan
2019-05-25
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume786Pages:884
SubtypeArticle
AbstractAs promising thermoelectric materials with great stability at high temperature, SrTiO3 based ceramics have attracted much attention, albeit the thermoelectric figure of merit remains relatively low for application. To improve the thermoelectric properties, reduced graphene oxide (RGO) is successfully incorporated into Nb-doped SrTiO3 (STNO) ceramics with Sr deficiency via a hetero-aggregation strategy followed by annealing and spark plasma sintering. The addition of RGO enhances the carrier concentration via reduction effect and increases the carrier mobility probably through lowering the double Schottky barrier at grain boundaries, resulting in highly improved electrical conductivity for the composites. Moreover, RGO also stimulates the separation of Nb rich TiO2 phase, which serves as a dispersion with low thermal conductivity to prohibit the phonon transport in the composites. Consequently, a ZT value reaching 0.22 at 800 K for the RGO/STNO nanocomposite is obtained, which is 1.8 times higher compared with the monolithic STNO. (C) 2019 Elsevier B.V. All rights reserved.
KeywordThermoelectric properties Composites Perovskite Graphene Secondary phase
DOI10.1016/j.jallcom.2019.01.376
Language英语
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27105
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Wu, Cao,Li, Jia,Fan, Yuchi,et al. The effect of reduced graphene oxide on microstructure and thermoelectric properties of Nb-doped A-site-deficient SrTiO3 ceramics[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2019,786:884.
APA Wu, Cao.,Li, Jia.,Fan, Yuchi.,Xing, Juanjuan.,Gu, Hui.,...&Jiang, Wan.(2019).The effect of reduced graphene oxide on microstructure and thermoelectric properties of Nb-doped A-site-deficient SrTiO3 ceramics.JOURNAL OF ALLOYS AND COMPOUNDS,786,884.
MLA Wu, Cao,et al."The effect of reduced graphene oxide on microstructure and thermoelectric properties of Nb-doped A-site-deficient SrTiO3 ceramics".JOURNAL OF ALLOYS AND COMPOUNDS 786(2019):884.
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