Surely we are very familiar with lithium batteries, our daily mobile phones, computers and other devices are in use, while the fuel cell is for  electric four wheel vehicle , hybrid car born. Utilizing a chemical reaction to produce hydrogen energy, the combustion product is water and very small amounts of carbon dioxide, virtually no impact on the environment. So for electric vehicles, whether the choice of lithium batteries or fuel it?
In the case of inconclusive us first compare the characteristics of these two cells.
1: Cost Price
Fuel cells: the high cost is a major obstacle to development, which led to the main reason for the high cost of hydrogen production process is complex, obtained by the method of electrolytic hydrogen or steam restructuring. Both approaches are very high cost, the cost required to manufacture the same quality of natural gas for hydrogen 1/2 or even 1/3.
Lithium-ion batteries: the relatively low cost of production, in addition to its very easy to use rechargeable, portable compared to other energy sources, which has a more cost-effective.
2: Environmental Impact
Fuel cells: combustion products for water, no petrol / diesel combustion-generated greenhouse gases.
Lithium-ion battery: discharging product may be provided by lithium oxide, lithium hydroxide, etc., will not affect on the environment. Lithium-ion batteries can be reused.

Overall, the impact of the fuel cell and lithium ion batteries on the environment is very small.
3: Material Structure
Fuel cells: the use of a polymer film as electrodes to produce electricity after the support hydroxide reaction. Polymer films require specially processed to withstand high temperatures and mechanical stress.

Lithium-ion batteries: Lithium-ion adsorption can charge the battery has a storage ability. Quality lithium ions are very light, and therefore is an ideal power source for automobile.
4: tap potential
Fuel cells: if the cost can be reduced, then as an alternative energy can truly gasoline / diesel fuel.
Lithium-ion battery: if it can further improve the energy density and cycle life can be longer, the driver is also a very good source of energy.

Regardless of the fuel cell or lithium-ion batteries, related technologies are a lot of room for improvement there.