HYDROGEN OR BATTERIES? Which is best?



Hydrogen Vs Batteries

Hydrogen cars have long ranges
RANGE: 700+ km.
REFUELING: In a few minutes.
CHALLENGE: Few filling stations
and expensive production method.
ADVANTAGE: Hydrogen can store
energy from renewable sources such
as solar cells and wind turbines.

Battery-powered cars get their energy from the grid
RANGE: A maximum of 500 km.
RECHARGING: 1-12 hours.
CHALLENGE: Short range and
very long charging time.
ADVANTAGE: Communicate
with the future grid, so the power
can be as cheap as possible.


Hydrogen stores energy well The major sales argument for hydrogen is its ability to store energy. Hydrogen contains 120 mega joules of energy per kg – compared to 44 for petrol. At best, batteries can store 2-3 mega joules per kg. a fully fueled hydrogen car has a range of 6-700 km, which is about the same as petrol-powered cars and much more than existing battery-fueled cars.
 Theoretically, a hydrogen car could have an.even longer range, but as hydrogen is a gas, it takes up more space than petrol does.



PROBLEMS




Hydrogen production
is a dirty process The dominant hydrogen extraction method is a process, by which
natural gas is split into tiny atomic constituents – carbon and hydrogen atoms – by means of very hot steam. The process emits CO2, making the hydrogen less “green”, and is very energy intensive – typically, 30 % are lost in the chemical reactions.



Charging takes
several hours
A lithium battery can only be charged with a certain intensity expressed in watts. If it is charged with too many watts, the battery
might overheat and be damaged. So, batteries are typically charged overnight via ordinary power supply to be fully charged. Charging
can now be carried out in close to one hour at fast charge points.


In 2017, Toyota declared that the company aims to install solid-state batteries in its battery-powered cars from 2020, and Fisker promises to follow suit in 2023. According to Fisker, its solid-state batteries can be charged in only one minute, i.e. just as quickly as filling up a car with petrol.Consequently, there is one less argument against replacing fuel by batteries

Worldwide sales of hydrogen cars have also gradually begun to rise. Since 2013, about 6,500 hydrogen cars have been sold, but sales doubled in 2017 as compared to the previous year. Japan aims to have 40,000 hydrogen cars in 2020, when Tokyo hosts the Olympic Games – according to plan using only hydrogen cars for logistics.

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