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Old 12-18-2018, 01:20 AM   #131 (permalink)
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Originally Posted by redpoint5 View Post
Why isn't there ever a story about a new technique that improves battery capacity by 5%? That's a believable story, and that to me is exciting. 10x increase in battery capacity and instant recharging, and 1/10 the cost... none of that interests me because I'm not into unicorns.
Exactly.
We don't even have a cheap low energy density grid battery from all these breakthroughs.
That tells me none of them worked at all in the real world, maybe just on paper like socialism.

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Old 01-05-2019, 03:23 PM   #132 (permalink)
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I was reading about peltier coolers (thermoelectric coolers) and found interesting the peltier effect, where two different metalic materials under some electric current generates a temperature differential in each side of the peltier plate.
Sadly the efficience it's low (10% to 15% only), much lower than good vapor compression refrigeratos (like usual ice box in homes), making it a bad alternative to compressors, despite youtubers have many DIY project using peltier plates for small cooling devices.

But it's also interesting how the reverse, apply different temperatures to each side of the peltier plate, also works as a generator of electricity.
Again it have poor efficience (5% to 8%), otherwise it could replace turbines.

Thermoeletric generator uses peltier effect in reverse, and it's called seebeck effect

I'm wondering if the claimed self charging battery, reported as using room temperature to recharge, could use some similar effect. But the seebeck effect, like Peltier effect, require a temperature differential on each side.

https://en.wikipedia.org/wiki/Thermoelectric_cooling

https://en.wikipedia.org/wiki/Thermoelectric_generator

https://en.wikipedia.org/wiki/Thermoelectric_effect

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Old 01-23-2019, 05:14 PM   #133 (permalink)
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Another contender:
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Old 01-23-2019, 11:03 PM   #134 (permalink)
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For the seebeck effect to work you have to have hot and cold sides.
If a seebeck cell is just inserted into a hot environment, nothing happens.
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Old 01-24-2019, 02:13 AM   #135 (permalink)
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Yet another contender, the carbon lead battery. Predicted by phys.org in 2011:

https://phys.org/news/2011-11-carbon...t-battery.html

Available as a [boat battery] product today:

https://duckduckgo.com/?q=Carbon+foa...sb&ia=products
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Old 01-24-2019, 08:35 AM   #136 (permalink)
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Yes, I knew it, and I did posted it in my post above.
But it shows that some effect generates electricity withou need a typical generator.


Quote:
Originally Posted by oil pan 4 View Post
For the seebeck effect to work you have to have hot and cold sides.
If a seebeck cell is just inserted into a hot environment, nothing happens.
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Old 02-15-2019, 05:05 PM   #137 (permalink)
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'Just have a think' looks at solid state battery developments and prominently mentions Goodenough and Braga:
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Old 02-15-2019, 05:23 PM   #138 (permalink)
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A good summation, but the chart at 7:00 is misleading, pulling a cross-axis out of his... thin air.
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Old 02-15-2019, 05:54 PM   #139 (permalink)
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The video explained a little bit about current technology, but absolutely nothing about solid state (unless the technobabble is considered an explanation).

The politics is awkward when mixing with the topic of science/technology. I'm generally not a fan of Trump, but he's unquestionably more intelligent than the average person. In fact, all of our presidents have had above average IQ.
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Old 02-15-2019, 06:03 PM   #140 (permalink)
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Quote:
Originally Posted by freebeard View Post
A good summation, but the chart at 7:00 is misleading, pulling a cross-axis out of his... thin air.
You know I hadn't seen what was in the bottom left corner nor what the graph stood for?

That was a low shot there, he should not do that. Even if the subject of his ire declares a national emergency to pay for what he said would be paid for by the Mexicans...

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