Producing more reaction regions on the PEMFC cathode using cavities with micro structures can be used to add more reaction points on the electrode. The original ladder type cavity is limited by the laser diffraction in its manufacture. The flat electrode has its performance improved for 58%. The energy density is increased from 462 mW/cm2 to 720mW/cm2. Pressure required in the micro-structure imprinting is reduced, so as the fuel transportation blocked by mold releasing. The total catalyst amount is cut from 0.5mg/cm2 to 0.25mg/cm2. No obvious performance drop can be found. This shows that most of the reactions happen in the region between catalyst layer and micro hole layer. Limited by the pattern of micro-structure, the electrospray does not perform as expected. In the future, this issue should be considered in making micro-structure.

Review of my recent work and influences.

The research direction is to apply the precision machining and the micro-electroform technology on LCD back light module (BLM). The goal is to strengthen the BLM energy utility, increase the BLM brightness, and save the material cost. In experiments we adopted the ultra precise machining and the micro-electroform technology in the LGP mold processing in order to enhance the BLM brightness. Since both technologies are different from the commonly used etching processing way, therefore, this study will be aimed at the analysis on three different processing technology in LGP. Consider the general LGP reflecting surface as the etching way is the base-line data for BLM average brightness, the change of reflecting surface is the V-cut processing way. After injection the reflecting surface of LGP is convex V-cut that may increase 6% brightness in comparison with the etching way. However, the application of the micro-electroform way of injection the concave V-cut LGP may again promote 6% brightness in its optics performance. Therefore, the increase of micro-electroform processing, the BLM brightness promotes approximately 12% compared to the etching way. That may reduce the lens use of the BLM and achieve the economic efficiency in cost redution.