5 ms·
Printable, flexible battery offers 10 times the density of lithium-ion
- baybal2 6y ago> tretchable battery with an areal capacity of 50 milliamps per square centimeter, which the team says is 10 to 20 times greater than that of a typical lithium-ion battery. 50 milliamps is not "10 to 20 times" "greater," but somewhat less than what single sheet lithium provides...
- mnw21cam 6y agoIt's also not a capacity. As is usual with any news article on battery technology, terminology is completely muddled between energy density and power density. The article actually uses the words "energy density", but then gets utterly confused about it. Also, why measure power/energy per unit area? It's much more useful to measure per unit volume or per unit mass.
- baybal2 6y agoMy assumption they talk about milliampHOURS
- throwawayffffas 6y agoYour assumption is indeed correct, see the original article in joule. https://www.cell.com/joule/fulltext/S2542-4351(20)30516-X?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS254243512030516X%3Fshowall%3Dtrue https://www.cell.com/joule/fulltext/S2542-4351(20)30516-X?_r...
- rozab 6y agoFor someone who doesn't know jack about batteries: What voltage is that at, and why don't they just use watt-hours?
- tuatoru 6y agoAccording to the article linked in your sibling, it's a Zinc-Silver oxide chemistry, so Wikipedia says 1.55V nominal. Summary at https://www.mpoweruk.com/silver_oxide.htm https://www.mpoweruk.com/silver_oxide.htm
- deleted 6y ago[deleted]
- numpad0 6y ago3.7V/50mAh in 1cm^2(1/2.54 insq or half a dime) is between an LR/SR41(1.5V/25mAh) to LR44(120mAh). Sounds handy for rechargeable smart rings, eyewears, pens, cards, clothes, where volume and surface areas are enough, but rigidity is questionable, and cannot accommodate round/thick coin cells.
- jononor 6y agoLR41/LR44 are non-rechargable, with rechargable versions having considerably lower capacities. They are also 3.9/5.4 mm tall. So these are potentially much better. Suspect it will take a few years to get to market though. Maybe for a future generation of our Starnight jewelry (https://www.instagram.com/p/Bn1rCotDB6Y/ https://www.instagram.com/p/Bn1rCotDB6Y/)
- kumarvvr 6y agoThis is great. Assuming it is environmentally on par with standard Li-Ion batteries, it would have great applications in many fields. - Medical Devices - Wearables - Foldable Phones - Roll out Phone screens and what not.
- cainxinth 6y agoWow, that’s great! I can’t wait to read about it for the next decade and never see an actual product using it. Seriously though, battery science must be as hard as they say. Every six months I read about some promising new development... that never, ever filters down to consumers.
- Retric 6y agoBattery’s have been constantly improving, so a lot of really promising research from 20 years ago ends up looking like a tiny incremental change when it hits the market.
- teddyh 6y agoThings developed 20 years ago hit their prime today because that’s when the patents expire.
- speedgoose 6y agoBut it does. Newer batteries have more capacity and charge faster. It's very obvious on smartphones or electric cars.
- kalleboo 6y agoI believe battery densities double approximately every 10 years. So yes they do improve. But just as much of the improvement we see in devices is making them draw less power. The press releases about battery development breakthroughs always promise instant order-of-magnitude improvements, something we never actually see.
- rhacker 6y agoVery true, I'm still waiting for my 80% solar panels.
- adrianN 6y agoDo you want to launch a satellite where every gram counts? We have plenty of space to put solar panels, Dollars per Watt is what you want to optimize and that measure has improved by orders of magnitude in the last twenty years.
- scythe 6y ago>The result of this is a flexible, stretchable battery with an areal capacity of 50 milliamps per square centimeter, which the team says is 10 to 20 times greater than that of a typical lithium-ion battery. All up, the team says the device can provide five to 10 times more power than a typical lithium-ion battery of the same size. Inaccurate title: the Zn/AgO battery has up to ten times the spatial power density of lithium-ion, which is useful but hardly new, being exceeded by most supercapacitors. It does not, however, have ten times the energy density, which is a much more difficult bar to reach. It probably has a good energy density, as do all silver-zinc batteries, but there's no indication here that the energy density is dramatically higher than when these batteries were used on the Apollo missions in the '60s. They're just flexible now (which is nice).
- juancn 6y agoNo mention of number of cycles?