Constructing nanoporous carbon nanotubes/Bi2Te3 composite for synchronous regulation of the electrical and thermal performances

CORC > 上海硅酸盐研究所 > 中国科学院上海硅酸盐研究所 > 高性能陶瓷和超微结构国家重点实验室 > 期刊论文

	Constructing nanoporous carbon nanotubes/Bi2Te3 composite for synchronous regulation of the electrical and thermal performances
	Zhang, Qihao 1,2; Xu, Leilei 1; Zhou, Zhenxing 1; Wang, Lianjun 1; Jiang, Wan 1,3; Chen, Lidong 2
刊名	JOURNAL OF APPLIED PHYSICS
	2017-02-07
卷号	121 期号:5
英文摘要	Porous nanograined thermoelectric materials exhibit low thermal conductivity due to scattering of phonons by pores, which are favorable for thermoelectric applications. However, the benefit is not large enough to overcome the deficiency in the electrical performance. Herein, an approach is presented to reduce the thermal conductivity and synchronously enhance the electrical conductivity through constructing a nanoporous thermoelectric composite. Carbon nanotubes (CNTs) are truncated and homogeneously dispersed within the Bi2Te3 matrix by a cryogenic grinding (CG) technique for the first time, which efficiently suppress the Bi2Te3 grain growth and create nanopores with the size ranging from dozens to hundreds of nanometers. The lattice thermal conductivity is substantially decreased by broad wavelength phonon scattering resulting from nanopores, increased grain boundaries, and newly formed interfaces. Meanwhile, the electrical conductivity is improved due to the enhanced carrier mobility, which may originate from the bridging effect between the Bi2Te3 grains and CNTs. The maximum ZT is improved by almost a factor of 2 due to the simultaneous optimization of electrical and thermal performances. Our study demonstrates the superiority of constructing a bulk thermoelectric composite with nanopores by the uniform dispersion of CNTs through a CG technique for enhanced thermoelectric properties, which provides a wider approach to thermoelectric nanostructure engineering. Published by AIP Publishing.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Physics, Applied
研究领域[WOS]	Physics
关键词[WOS]	ENHANCED THERMOELECTRIC PERFORMANCE ; HYBRID NANOCOMPOSITES ; BULK THERMOELECTRICS ; CONDUCTIVITY ; POWER ; POWDERS ; FIGURE ; MERIT
收录类别	SCI
语种	英语
WOS记录号	WOS:000394345700038
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/23583]
专题	上海硅酸盐研究所_高性能陶瓷和超微结构国家重点实验室_期刊论文
作者单位	1.Donghua Univ, Coll Mat Sci & Engn, State Key Lab Modificat Chem Fibers & Polymer Mat, Shanghai 201620, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China 3.Jingdezhen Ceram Inst, Sch Mat Sci & Engn, Jingdezhen 333000, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Qihao,Xu, Leilei,Zhou, Zhenxing,et al. Constructing nanoporous carbon nanotubes/Bi2Te3 composite for synchronous regulation of the electrical and thermal performances[J]. JOURNAL OF APPLIED PHYSICS,2017,121(5).
APA	Zhang, Qihao,Xu, Leilei,Zhou, Zhenxing,Wang, Lianjun,Jiang, Wan,&Chen, Lidong.(2017).Constructing nanoporous carbon nanotubes/Bi2Te3 composite for synchronous regulation of the electrical and thermal performances.JOURNAL OF APPLIED PHYSICS,121(5).
MLA	Zhang, Qihao,et al."Constructing nanoporous carbon nanotubes/Bi2Te3 composite for synchronous regulation of the electrical and thermal performances".JOURNAL OF APPLIED PHYSICS 121.5(2017).