The Laptop Battery The Lithium Ion Battery System



Applications: Laptop computers, advanced cellular phones, personal data assistants, and military electronics, such as mine detectors, satellites, military radios, and thermal weapon sights.

 Cathode/Anode/Electrolysis: Lithium Cobalt Oxide/Graphite/Lithium hexaflourophosphate. It should be noted that noted four types of electrolytes are used in Lithium-ion batteries: liquid electrolytes, gel electrolytes, polymer electrolytes and ceramic electrolytes. Lithium hexaflourophosphate, a liquid electrolyte is the most commonly used electrolyte in Lithium-ion battery systems.

 Chemistry:   LiCoO2 Li1-xCoO2 + xLi+ + xe-         cathode
                        C + xLi+ + xe-
LixC                              anode

                        LiCoO2 + C
LixC + Li1-xCoO2           (charge reaction)

 Distinguishing Characteristics: 

  • Sealed batteries with no maintenance required.

  • Long cycle life.

  • Long shelf-life.

  • Operative within a broad range of temperatures.

  • Low self-discharge rate.

  • Rapid re-charge capability.

  • High rate and power discharge capability.

  • High Coloumbic and energy efficiency.

  • High specific energy and energy density.

  • No memory effect.

 Fun Fact: Lithium has the lightest weight, highest voltage, and greatest energy density of all metals.

 Note: The active materials contained within the Lithium-ion battery, operate by reversibly incorporating lithium into the interstitial space with the host material electrodes. Hence, host materials for the electrodes considered most suitable for the Lithium-ion cell battery system are metal oxide (tunneled structure) cathodes and graphitic (layered structure) anodes.

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