15. مميزات و عيوب خلية الوقود
العيوب المميزات
كبيرة الحجم • تستخدم للحصول على الماء •
مرتفعة التكلفة • النقى و خاصة فى سفن
الفضاء
ل تنتج مواد ملوثة للبيئة •
31/40/20 by:Mr.mohamed Farouk
17. Type of Battery Advantages Disadvantages
Lead acid Rechargeable Heavy
Long life Contain acid
12 V Weather issues
Alkaline/Dry cell Inexpensive Heavier
No toxic metals used
Lots of power (1.5 V down to 1.2 V)
Lithium (solid state) Lightweight Expensive
Higher capacity (3.6-3.9 V)
Rechargeable
Longer lasting
Less likely to leak/explode
Fuel cells No recharging high initial cost
No harmful pollutants Fuel not readily
available
Nickel-Cadmium (Ni-Cd) Fast/simple charge (rechargeable) Toxic metals
High # charges Expensive
1.2 V continuously
Mercury More constant voltage (1.35 V) More expensive
02/04/13 Longer life
by:Mr.mohamed Farouk
Lighter
18. Electrolysis
Decomposition of substance
by electric current
Galvanic Cell Electrolytic Cell
Cathode + (reduction) - (reduction)
Anode - (oxidation) + (oxidation)