کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1287000 | 973209 | 2006 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A hydrogen refill for cellular phone A hydrogen refill for cellular phone](/preview/png/1287000.png)
A device has been designed to generate hydrogen for a fuel cell powered cellular phone. The device is based on the chemical reaction between NaBH4 and hydrochloric/water solution to satisfy the hydrogen request at room temperature and pressure. The operation mechanism and controlling method is based on the Kipp's gas generating apparatus. A prototype has been built and tested to evaluate the optimum salt/acid and acid/solution ratios and check the hydrogen mass flow rates upon operation and the pressure variation in stand-by condition. The system works delivering hydrogen flows ranging between 0 and 10 ml min−1. In a typical test the hydrogen flow was set to 5 ml min−1 to match a 1 W power fuel cell. The working pressure was slightly higher than the atmospheric one. The hydrogen capacity was as high as 2.5% (w/w). By converting this amount of hydrogen in electricity by a fuel cell working at 0.8 V it is possible to achieve a system energy density of about 720 Wh kg−1, four times larger than commercial high energy density lithium-ion batteries.
Journal: Journal of Power Sources - Volume 161, Issue 1, 20 October 2006, Pages 290–293