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Lithium Battery

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by

Yolanda Rodriguez

on 17 March 2015

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Transcript of Lithium Battery

Lithium Battery
Lithium Battery is a group of electrical batteries that have lithium anode and is used in many electronic devices
Use of Lithium Battery
Lithium batteries are often used as power sources for portable electronics and implanted medical devices.
Mobile phones
Smartphones
Laptops
Tablets
Digital cameras
Camcorders
Electric cigarettes
Hand held game console
Flashlights
The End :)
Thank you!
Chemical Equations for the Reactants
The positive electrode is made from chemical compound named lithium cobalt oxide (LiCoO2) or lithium iron phosphate (LiFePO4).
The chemical reaction that takes place during the charge and discharge, inside the battery is as follows:
Lithium Battery Diagrams
Substances lose and gain of electrons
When the battery is discharging lithium ions + transport a current from - to + electrode.
Speed and Concentration
Electron Flow
Electrons tend to flow in the opposite direction around the outer circuit.
When all the ions stop flowing, the battery is supposed to be fully charged and ready to use.
During discharging the battery, the ions flow back from the negative electrode to the positive electrode. Electrons tend to flow the opposite way through the outer circuit, powering our laptop.
Rechargeable Battery?
Recyclable?
Environmental Concerns
One of the
most common rechargeable batteries
in portable electronics such as: computers peripherals, digital cameras, games, etc.
One of the
best energy density.
Slow in loss of charge
when not used.
This battery is one of the
most popular batteries
, and this battery has the
ability to obtain a greater charge
than any other battery.
Environmentally safe
because there is not free lithium metal.
This battery is
not quite recyclable.
Although you can recycle the battery, but due to cost, complexities and low yield, recycle is not the best choice.
A lithium-ion rechargeable battery consists of a
spiral structure
with 4 layers.
A
positive electrode
activated by cobalt acid lithium, a negative electrode activated by special carbon, and separator are put together in a whirl pattern and stored in the case.
It also incorporates a variety of
safety protection systems
such as a gas discharge valve which helps prevent the battery from exploding by releasing internal gas pressure if it exceeds the design limit.
Factors affecting life:
1. Charging voltage
2. Temperature
3. negative health and environmental impact

The environmental impacts include
resource depletion, global warming, and ecological toxicity
while the health impacts are
poor respiratory, pulmonary and neurological effects.
These impacts are a result of the production, processing and use of cobalt and nickel metal compounds.
When the battery is charging, then there is a reversal chemical change the lithium ions that are - turn + when electric current is added to recharge the battery.
Power of Battery measured
size-
different sizes batteries generate different energy power for example the energy a Li batter would give is 100 to 265 kilowatt hour or Wxh/kg.
(kilowatt hour is a unit of energy = 1000 watt hrs)
Voltage-
the voltage is determined by the chemistry in the battery for example Li are 3v and all lead acid's are 2v. therefore, most electronic devices use many alkalines to create the voltage they need in order to function properly
By Yolanda Rodriguez, Valeria Chavez, and Andrea Llamas
During lithium insertion into a cathode particle the particles surface region becomes lithiated and two
distinct phase regions (a lithiated phase and a delithiated phase region) emerge within the originally
homogenous material. Between the two regions a phase barrier exists. One phase is transformed into its
particular counterpart as lithium insertion proceeds and the barrier propagates from the particles surface
towards the center. The lithium concentrations within each phase region remains constant. This two-phase
transition continues until the particle is completely transformed. During lithium de-insertion the particles
surface region becomes delithiated first and the phase barrier propagates towards the particles center
again until the particle is completely delithiated. The phase separation in the two-phase state is stable over time.
A battery is a power cell used to generate electrical energy.
A Battery
( You can determine how much power your battery has by looking at the battery image on you phone or portable electronic.)
Refrence
http://en.wikipedia.org/wiki/Lithium-ion_battery
http://www.physicscentral.com/explore/action/lithium.cfm
http://www.explainthatstuff.com/how-lithium-ion-batteries-work.html
http://www-scf.usc.edu/~rzhao/LFP_study.pdf
Charging and Discharging
Full transcript