High-efficiency electrochemical thermal energy harvester using carbon nanotube aerogel sheet electrodes

被引：291

作者：

Im, Hyeongwook ^{[1
]}

Kim, Taewoo ^{[1
]}

Song, Hyelynn ^{[1
]}

Choi, Jongho ^{[1
]}

Park, Jae Sung ^{[2
]}

Ovalle-Robles, Raquel ^{[3
]}

Yang, Hee Doo ^{[4
]}

Kihm, Kenneth D. ^{[5
]}

Baughman, Ray H. ^{[6
]}

Lee, Hong H. ^{[7
]}

Kang, Tae June ^{[8
]}

Kim, Yong Hyup ^{[1
,9
]}

机构：

[1] Seoul Natl Univ, Sch Mech & Aerosp Engn, Seoul 151742, South Korea

[2] Seoul Natl Univ, Inst Adv Machinery & Design, Seoul 151742, South Korea

[3] Lintec America Inc, Nanosci & Technol Ctr, Richardson, TX 75081 USA

[4] Pusan Natl Univ, Dept NanoMechatron Engn, Coll Nanosci & Nanotechnol, Busan 609735, South Korea

[5] Univ Tennessee, Dept Mech Aerosp & Biomed Engn, Knoxville, TN 37996 USA

[6] Univ Texas Dallas, Alan G MacDiarmid NanoTech Inst, Richardson, TX 75080 USA

[7] Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 151744, South Korea

[8] Inha Univ, Dept Mech Engn, Incheon 22212, South Korea

[9] Seoul Natl Univ, Inst Adv Aerosp Technol, Seoul 151742, South Korea

来源：

NATURE COMMUNICATIONS | 2016年 / 7卷

基金：

新加坡国家研究基金会;

关键词：

THERMOGALVANIC CELLS; MASS-TRANSFER; PERFORMANCE; PURIFICATION; THERMOELECTRICS; THERMODYNAMICS; COEFFICIENTS; ENHANCEMENT; GENERATION; KINETICS;

D O I：

10.1038/ncomms10600

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Conversion of low-grade waste heat into electricity is an important energy harvesting strategy. However, abundant heat from these low-grade thermal streams cannot be harvested readily because of the absence of efficient, inexpensive devices that can convert the waste heat into electricity. Here we fabricate carbon nanotube aerogel-based thermo-electrochemical cells, which are potentially low-cost and relatively high-efficiency materials for this application. When normalized to the cell cross-sectional area, a maximum power output of 6.6 W m(-2) is obtained for a 51 degrees C inter-electrode temperature difference, with a Carnot-relative efficiency of 3.95%. The importance of electrode purity, engineered porosity and catalytic surfaces in enhancing the thermocell performance is demonstrated.

引用

页数：9

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