scroll to top
Stuck on your essay?
Get ideas from this essay and see how your work stacks up
Word Count: 617
Electric vehicles can benefit us in many ways Comparing with the internal combustion engine EVs dont cause pollution when operating They can run in a long period of time Economically because these vehicles using battery they reduce the oil import and the imbalance trading in the US and also the users save a lot of money The cells used for these vehicles are called Nickel metal hydride battery which are very high power long life quick charge and easy to maintain CELL REACTION The NiMH battery stores hydrogen as a reaction product in the solid phase The anode electrode contain hydrogen material that can allow electrochemical storage and release of hydrogen during charge and discharge The cathode electrode is reversible between NiOH2 and nickel oxyhydroxide NiOOH At both electrode oxidation-reduction reactions take place in an alkaline medium consisting of 30 by weight KOH in water When charging NiOH2 at the positive electrode becomes oxidized and the metal hydride becomes reduced In fact the hydrogen which was separated from water come to react with the metal in the negative electrode to form MH On the other hand the hydroxyl ion from water reacts with NiOH2 at the positive electrode to form NiOOH Ni now change from 2 to 3 M H2O e MH OH NiOH2 OH NiOOH H2O e From equation 1 and 2 there is no net change in electrolyte quantity or concentration over the charge and discharge cycle We can see that it is different from other alkaline electrode such as NiCd which water is produced at both electrode during charge and used up during discharge In the NiMH battery the constant average concentration can reduce the corrosion and swelling MATERIAL REQUIRED Because the NiMH battery need to store a large amount of hydrogen to produce high energy it is desirable to have high electrode capacity Importantly in the desire of
@Kibin is a lifesaver for my essay right now!!
- Sandra Slivka, student @ UC Berkeley
Wow, this is the best essay help I've ever received!
- Camvu Pham, student @ U of M
If I'd known about @Kibin in college, I would have gotten much more sleep
- Jen Soust, alumni @ UCLA