Highly Enhanced Thermoelectric Properties of Bi/Bi2S3 Nanocomposites

Ge, Zhen-Hua1,2; Qin, Peng1; He, DongSheng2; Chong, Xiaoyu1; Feng, Dan2; Ji, Yi-Hong1; Feng, Jing1; He, Jiaqing2,3

2017-02-08

10.1021/acsami.6b14803

ACS Applied Materials & Interfaces   影响因子和分区

1944-8244

1944-8252

Bismuth sulfide (Bi2S3) has been of high interest for thermoelectric applications due to the high abundance of sulfur on Earth. However, the low electrical conductivity of pristine Bi2S3 results in a low figure of merit (ZT). In this work, Bi2S3@Bi core-shell nanowires with different Bi shell thicknesses were prepared by a hydrothermal method. The core-shell nanowires were densified to Bi/Bi2S3 nanocomposite by spark plasma sintering (SPS), and the structure of the nanowire was maintained as the nanocomposite due to rapid SPS processing and low sintering temperature. The thermoelectric properties of bulk samples were investigated. The electrical conductivity of a bulk sample after sintering at 673 K for 5 min using Bi2S3@Bi nanowire powders prepared by treating Bi2S3 nanowires in a hydrazine solution for 3 h is 3 orders of magnitude greater than that of a pristine Bi2S3 sample. The nanocomposite possessed the highest ZT value of 0.36 at 623 K. This represents a new strategy for densifying core-shell powders to enhance their thermoelectric properties.

Bi Bi2S3 nanowires core-shell thermoelectric

SCI ; EI

英语

通讯

leading talents of Guangdong province Program[00201517]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000393848900063

AMER CHEMICAL SOC

20170703341353

Bismuth ; Electric conductivity ; Layered semiconductors ; Nanocomposites ; Nanowires ; Nitrogen compounds ; Powders ; Shells (structures) ; Spark plasma sintering ; Sulfur compounds ; Thermoelectric equipment ; Thermoelectricity

Structural Members and Shapes:408.2 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Thermoelectric Energy:615.4 ; Electricity: Basic Concepts and Phenomena:701.1 ; Nanotechnology:761 ; Solid State Physics:933

Web of Science

1.Kunming Univ Sci & Technol, Fac Mat Sci & Engn, Kunming 650093, Peoples R China
2.South Univ Sci & Technol China, Shenzhen Key Lab Thermoelect Mat, Dept Phys, Shenzhen 518055, Peoples R China
3.Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China

Ge, Zhen-Hua,Qin, Peng,He, DongSheng,et al. Highly Enhanced Thermoelectric Properties of Bi/Bi2S3 Nanocomposites[J]. ACS Applied Materials & Interfaces,2017,9(5):4828-4834.

Ge, Zhen-Hua.,Qin, Peng.,He, DongSheng.,Chong, Xiaoyu.,Feng, Dan.,...&He, Jiaqing.(2017).Highly Enhanced Thermoelectric Properties of Bi/Bi2S3 Nanocomposites.ACS Applied Materials & Interfaces,9(5),4828-4834.

Ge, Zhen-Hua,et al."Highly Enhanced Thermoelectric Properties of Bi/Bi2S3 Nanocomposites".ACS Applied Materials & Interfaces 9.5(2017):4828-4834.