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Novel Flow Field with Superhydrophobic Gas Channels Prepared by One-step Solvent-induced Crystallization for Micro Direct Methanol Fuel Cell 被引量:2
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作者 Junsheng Liang Kuanyao Liu +4 位作者 Shouzuo Li Dazhi Wang tongqun ren Xiaoying Xu Ying Luo 《Nano-Micro Letters》 SCIE EI CAS 2015年第2期165-171,共7页
The CO2-induced capillary blocking in anode flow field is one of the key adverse factors to reduce the performance of a micro-direct methanol fuel cell(l DMFC). In order to solve this problem, new polycarbonate(PC) fl... The CO2-induced capillary blocking in anode flow field is one of the key adverse factors to reduce the performance of a micro-direct methanol fuel cell(l DMFC). In order to solve this problem, new polycarbonate(PC) flow field plates with nested arrangement of hydrophilic fuel channels and superhydrophobic gas channels were designed,fabricated, and tested in this work. The gas channels were treated with solvent-induced crystallization using acetone solution. The superhydrophobicity with 160° water contact angle and 2° tilting angle was obtained on the PC substrates. A dummy cell using hydrogen peroxide decomposition reaction and a test loop were separately set up to evaluate the flow fields' performance. It was found that a 37 % pressure drop decrease can be obtained in the new serpentine flow field compared with that of the conventional one. The benefit of the new flow field to remove gas bubbles was also confirmed by an in situ visualization study on the dummy cell. Results show that the auxiliary superhydrophobic gas channels can speed up the discharge of the gas bubbles from the flow field, which will in turn improve the l DMFC performance. 展开更多
关键词 Fuel cell Flow field SUPERHYDROPHOBIC Solvent-induced crystallization
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Fabrication of micro/nano-structures by electrohydrodynamic jet technique 被引量:3
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作者 Dazhi WANG Xiaojun ZHAO +4 位作者 Yigao LIN tongqun ren Junsheng LIANG Chong LIU Liding WANG 《Frontiers of Mechanical Engineering》 SCIE CSCD 2017年第4期477-489,共13页
Electrohydrodynamicjet (E-Jet) is an approach to the fabrication of micro/nano-structures by the use of electrical forces. In this process, the liquid is subjected to electrical and mechanical forces to form a liqui... Electrohydrodynamicjet (E-Jet) is an approach to the fabrication of micro/nano-structures by the use of electrical forces. In this process, the liquid is subjected to electrical and mechanical forces to form a liquid jet, which is further disintegrated into droplets. The major advantage of the E-Jet technique is that the sizes of the jet formed can be at the nanoscale far smaller than the nozzle size, which can realize high printing resolution with less risk of nozzle blockage. The E-Jet technique, which mainly includes E-Jet deposition and E-Jet printing, has a wide range of applications in the fabrication ofmicro/nano-structures for micro/nano-electromechanical system devices. This tech- nique is also considered a micro/nano-fabrication method with a great potential for commercial use. This study mainly reviews the E-Jet deposition/printing fundamentals, fabrication process, and applications. 展开更多
关键词 electrohydrodynamic jet deposition electro-hydrodynamic jet printing micro/nano-structures film
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