You might ask what makes solid-state batteries different from semi-solid state batteries. The biggest difference is in the electrolyte. Solid-state batteries use only solid materials. This gives them the highest energy density. A semi-solid state battery uses some liquid with solid parts.
You may wonder, what does energy density mean for a lithium polymer battery? It tells you how much energy the battery can hold compared to its weight or size. Most lithium polymer batteries have energy density between 100 and 200 Wh/kg, or 200 to 400 Wh/L.
You use your phone or laptop every day. But have you thought about why batteries do not last forever? Battery cycle life shows how many times you can charge and use a battery before it loses power.
