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It would be interesting to know the weight and cost per capacity of these batteries. Capacitors have almost unlimited cycle count but they can store only tiny
by pkolaczk 10y ago
It would be interesting to know the weight and cost per capacity of these batteries. Capacitors have almost unlimited cycle count but they can store only tiny amounts of energy, so that makes them somehow useless for powering consumer devices or cars. It seems like the hardest thing in batteries is to get all of the following at the same time: low cost of materials and manufacturing, safety, high energy density, and high durability / high cycle count, high power output / quick charging.
- nine_k 10y agoHigh energy density and safety are somehow mutually contradictory. It's very tricky to have a lot of energy packed into a small volume and not let it be quickly released in a blast. Quick charging is also tricky. If you have a 10 Ampere-hour battery and want to charge it in 15 minutes, you can't have your average charging current below 100 A. This takes really thick wires, and will release a lot of heat.