A hydrogen refill for cellular phone

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A device has been designed to generate hydrogen for a fuel cell powered cellular phone. The device is based on the chemical reaction between NaBH4and 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-1to 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. © 2006.
Original languageEnglish
Pages (from-to)290 - 293
Number of pages4
JournalJournal of Power Sources
Issue number1
Publication statusPublished - 20 Oct 2006


All Science Journal Classification (ASJC) codes

  • Electrochemistry
  • Fuel Technology
  • Materials Chemistry
  • Energy (miscellaneous)

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