is about a scientist and batteries

1. Science june holiday
project 2012
By: Dini
Calvin
Mohd syafiq

2. The scientist is…
Alessandro
Volta

3. Alessandro Volta
• Born in Como, Italy
• 18 February 1745 – 5 March
1827
• Expertise in physics and
chemistry
• Invented the first electric
battery (voltaic pile)

4. Once upon a time…
• His friend, Luigi Galvani, said
that he discovered “animal
electricity”
• Luigi connected two different
metals, in series, with the frog’s
leg
• Volta thinks that the leg is a
conductor and a detector of
electricity
Luigi galvani • So he conducted an experiment
to prove him wrong

5. Voltaic pile
• Significant invention
• It an early electric
battery
• Made mainly up of:
zinc, copper and
electrolyte(sulfuric acid)
• The electrolyte exists in
the form 2H+ and SO42−

6. Voltaic Pile
• Zinc reacts with SO42−
• 2H+ ions capture electrons from
copper, forming hydrogen gas
• Making zinc the negative electrode while
copper the positive electrode
Reactions:
• zinc
Zn → Zn2+ + 2e−
• sulfuric acid
2H+ + 2e− → H2

7. Voltaic Pile
Disadvantages:
• Very dangerous to handle as there is
sulfuric acid
• Life span of the battery is 1 hour
After Alessandro Volta’s invention, it
led other scientists to find other ways
to improve the quality of the cell.

8. After the voltaic pile
• 1836 - the Daniell cell • 1899 - the nickel-cadmium
• 1842 - the Poggendorff battery: the first alkaline
cell battery
• 1844 - the Grove cell • 1903 - the nickel-iron
• 1859 - the lead-acid battery
cell: the first • 1955 - the common
rechargeable battery alkaline battery
• 1860s - the gravity cell • Early 1970s - the nickel
• 1866 - the Leclanché hydrogen battery
cell • Late 1980s - the nickel
• 1887 - the zinc-carbon metal-hydride battery
cell: the first dry cell • 1970s and 1990s - the
lithium and lithium-ion
batteries

9. IMPACT
This discovery helped many scientists in other
research. For example;
• William Nicholson and Anthony
Carlisle used it to discover the
electrolysis of water
• William Hyde Wollaston showed
that electricity from voltaic piles
had identical effects to those of
electricity produced by friction
• Vasily Petrov used voltaic piles
in the discovery and research of
electric arc effects William Nicholson and
Anthony Carlisle

10. Summary
In conclusion, Alessandro Volta made an
important discovery. Without it, we wouldn’t be
able to carry our phones, computer or calculator
wherever we go. electricity is an important form
of energy. Having batteries, it makes people’s life
easier and have a good lifestyle 