Thermoelectric Properties of Reduced Graphene Oxide/Bi2Te3 Nanocomposites

被引：27
作者：
Du, Yong [1 ]
Li, Jia [1 ]
Xu, Jiayue [1 ]
Eklund, Per [2 ]
机构：
[1] Shanghai Inst Technol, Sch Mat Sci & Engn, 100 Haiquan Rd, Shanghai 201418, Peoples R China
[2] Linkoping Univ, Dept Phys Chem & Biol IFM, Thin Film Phys Div, SE-58183 Linkoping, Sweden
来源：
ENERGIES | 2019年 / 12卷 / 12期
基金：
中国国家自然科学基金;
关键词：
reduced graphene oxide; Bi2Te3; composite; thermoelectric; BISMUTH-ANTIMONY-TELLURIDE; PERFORMANCE; FACILE; BI2TE3; OXIDE; CONDUCTIVITY; PROGRESS; FIGURE;
D O I：
10.3390/en12122430
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Reduced graphene oxide (rGO)/Bi2Te3 nanocomposite powders with different contents of rGO have been synthesized by a one-step in-situ reductive method. Then, rGO/Bi2Te3 nanocomposite bulk materials were fabricated by a hot-pressing process. The effect of rGO contents on the composition, microstructure, TE properties, and carrier transportation of the nanocomposite bulk materials has been investigated. All the composite bulk materials show negative Seebeck coefficient, indicating n-type conduction. The electrical conductivity for all the rGO/Bi2Te3 nanocomposite bulk materials decreased with increasing measurement temperature from 25 degrees C to 300 degrees C, while the absolute value of Seebeck coefficient first increased and then decreased. As a result, the power factor of the bulk materials first increased and then decreased, and a power factor of 1340 mu Wm(-1)K(-2) was achieved for the nanocomposite bulk materials with 0.25 wt% rGO at 150 degrees C.
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页数：10
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