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Time for our regularly scheduled monthly battery "breakthrough" PR campaign! Does this one walk on water?
by passwordoops 3y ago
Time for our regularly scheduled monthly battery "breakthrough" PR campaign!
Does this one walk on water?
- readthenotes1 3y agoIt's a better battery bulletin, it has no legs
- passwordoops 3y agoThis is the first time I wish HN had emoji reactions. It would have been :drum:
- robertlagrant 3y agoI can make one that floats on water. Get me a headline[0]! [0] does not hold charge
- samstave 3y agoJust make the whole thing out of potassium.
- moolcool 3y agoThere's a cynical comment like this on every battery story, ignoring the fact that battery breakthroughs do exist, and that lithium ion energy density has ~tripled in the past decade.
- samstave 3y agoMind an ELI5 of how they tripled lith batt density/capacity?
- passwordoops 3y agoShow me one example where a breathless announcement like this contributed to such an improvement
- _hypx 3y ago> lithium ion energy density has ~tripled in the past decade. That's actually false. It originated from a literally made-up story by Bloomberg. In reality, NCA cells have existed since the late-2000s. Effective energy density was 250 Wh/kg. We have not significantly improved on this value since then.
- moolcool 3y agohttps://www.energy.gov/eere/vehicles/articles/fotw-1234-april-18-2022-volumetric-energy-density-lithium-ion-batteries https://www.energy.gov/eere/vehicles/articles/fotw-1234-apri...
- _hypx 3y agoThe author of that article is simply wrong. I've seen this post more than once now and it is becoming a serious mistake on their part. FYI, high energy density li-ion batteries existed since 2009: https://news.panasonic.com/global/press/en091218-2 https://news.panasonic.com/global/press/en091218-2 There is hard contradictory evidence to the claims of that DoE article.
- ProjectArcturis 3y agoIs there a distinction between the batteries existing vs. being in mass production? A lot of the difficulty comes from scaling production processes.
- _hypx 3y agoYou figure there are cost issues related to lack of mass production. But ultimately, the chemistry is there and you can could have build something in the late 2000s or early 2010s at those higher energy densities. Certainly, any graph that goes right through 2017 and not mention these advances from 2009 would be nonsensical. It is ignoring 8+ years of preexisting technology.