The construction of integrated Si-based micro proton exchange membrane fuel cells with improved performances
The construction of integrated Si-based micro proton exchange membrane fuel cells with improved performances
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性能改进的一体化硅基微型质子交换膜燃料电池的构建
DOI：
10.1016/j.nanoen.2019.05.014
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发表时间：
2019-07
期刊：
影响因子：
17.6
通讯作者：
Kang Junyong
中科院分区：
文献类型：
--
作者：
Yu Yingjian;Wang Yucheng;Zhang Shan;Zhang Pengyang;Xue Shi;Xie Yannan;Zhou Zhiyou;Li Jing;Kang Junyong
通过在硅片上构建层叠的点状流场，然后用炭黑作为气体扩散层（GDL）和Pt/C催化剂层进行压实，制备了集成式微质子交换膜燃料电池（μPEMFCs），取代了传统的碳纸或碳布作为GDL，省去了热压加工，具有简单性和良好的设备完整性。通过对sio2sphere模板组装、干蚀刻、通道切割等硅兼容工艺的精心操作，优化了晶圆尺度的分层流场，从而有效地改善了流体输运和气体分布。最终，将石墨双极板单独替换为分层硅基流场时，峰值功率超过1W/cm2，而在测量尺寸为4 cm2的集成硅基μPEMFCs中，成功实现了354 mW/cm2的最大功率。这项工作不仅拓宽了pemfc在微/纳米机电系统（M/NEMS）或其他硅基电子器件中的应用，而且为其他金属空气电池（如锌空气电池和铝空气电池）的制造提供了指导。
The integrated micro proton exchange membrane fuel cells (μPEMFCs) were fabricated by constructing the hierarchical dot-type flow fields on Si wafers and then being compacted with the carbon black as gas diffusion layer (GDL) and Pt/C catalyst layer, which presents the simplicity and good device-integrity by replacing the traditional carbon paper or cloth as GDL and omitting the hot-press processing. The Si-compatible processes, including the template assembly of SiO2spheres, dry etching, channel dicing, were elaborately manipulated to optimize the wafer-scale hierarchical flow field and thus industriously improve the fluids transport and gas distribution. Ultimately, the peak power of over 1W/cm2was accomplished when the graphite bipolar plates were replaced by the hierarchical Si-based flow fields alone, while the maximum power of 354 mW/cm2was successfully demonstrated in the integrated Si-based μPEMFCs with measured size of 4 cm2. This work not only broadens the application of PEMFCs to micro/nano-electro-mechanical systems (M/NEMS) or other Si-based electronic devices, but also provides guidelines for fabricating other metal-air batteries such as Zn-air batteries and Al-air batteries.
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