Презентація для стем-уроку з теми "Наука і технічний прогрес" 11 клас англійська мова

Why Lithium-ion Batteries Explode

Lithium ion batteries. Rechargeable. Use a separator. Most commonly used batteries. High energy density. Lightweight for its size. Electrodes: cathode Li. CO2 anode C (Graphite)Electrolyte: lithium salt with organic solvent. Separator : Permeable membrane

Advantages. High energy density. Rechargeable. No memory effect – no need to discharge them completely before recharging. Handles many charge/discharge cycles. Holds the charge – loses only 5% of its charge every month

Disadvantages. Lasts only 2-3 years after manufacture. Sensitive to high temperatures. If it is completely discharged, it can no longer be recharged again. Relatively expensive. If the Separator gets damaged, it can burst into flames

Agree or disagree. Electricity is the flow of electrons through a conductor. The metals become more reactive over time, until the battery is flat. Lithium compound has a lattice structure. Ions can’t be inserted without changing properties of the metal. Keep battery around 50% to shorten its life.

Answer the questions1. Where does the oxidation happen?2. Where does the reduction happen?3. What do we call a positively charged electrode? 4. What do we call the negatively charged electrode?5. Is there anything to control the process of charging of a phone?

Answer the questions (yes/ no)6. What can provoke any possible problems with the lithium ion battery?Production defects. Careful usage Overcharge. Overheating. The probability that your phone can explode is very high

How to avoid explosion

How to make your battery life last longer?