共 73 条
Double doping approach for unusually stable and large n-type thermoelectric voltage from p-type multi-walled carbon nanotube mats
被引:46
作者:
Hu, Qiujun
[1
]
Lu, Zhongxu
[3
]
Wang, Yizhuo
[1
]
Wang, Jing
[1
]
Wang, Hong
[1
,2
]
Wu, Ziping
[3
]
Lu, Guanghao
[1
]
Zhang, Hao-Li
[4
]
Yu, Choongho
[5
]
机构:
[1] Xi An Jiao Tong Univ, Frontier Inst Sci & Technol, Xian 710054, Peoples R China
[2] Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710054, Peoples R China
[3] Jiangxi Univ Sci Technol, Sch Mat Sci & Engn, Ganzhou 341000, Peoples R China
[4] Lanzhou Univ, Coll Chem & Chem Engn, State Key Lab Appl Organ Chem SKLAOC, Lanzhou 730000, Peoples R China
[5] Texas A&M Univ, Mech Engn Dept, College Stn, TX 77843 USA
基金:
中国国家自然科学基金;
新加坡国家研究基金会;
关键词:
HIGH-PERFORMANCE;
ELECTRICAL-CONDUCTIVITY;
CHARGE-TRANSFER;
COMPOSITES;
POWER;
POLYMER;
FABRICATION;
TRANSPORT;
MODULES;
THERMOPOWER;
D O I:
10.1039/d0ta03247f
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
Multi-walled carbon nanotubes (MWCNTs) have shown low n-type Seebeck coefficients (-10 mu V K-1), which are not good enough to prepare high performance low-cost MWCNT based mechanically flexible thermoelectric devices. Here, we present a double doping approach utilizing a small n-type doping molecule, 1,3-dimethyl-2-phenyl-2,3-dihydro-1H-benzimidazole (N-DMBI), in addition to encapsulated metal (iron) nanoparticles for achieving a high n-type thermoelectric performance with MWCNTs. With double doping, we have shown high n-type Seebeck coefficients up to -56 mu V K(-1)along with a power factor up to 112 mu W m(-1)K(-2)at room temperature, which, to the best of our knowledge, is at least an order of magnitude higher than the power factors of previously reported n-type MWCNT based organic materials. More importantly, the negative Seebeck coefficient was maintained even after 60 days' exposure to air. An outstanding output power of 1.9 W m(-2)at a temperature difference of 60 K was generated with a flexible thermoelectric device made of only MWCNT mats. The new findings could lead to the development of robust and flexible thermoelectric devices made of only low-cost MWCNTs.
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页码:13095 / 13105
页数:11
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