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View Diary: A Better Battery Changes The World, Crossing The Alt-E Threshold (175 comments)

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  •  You didn't watch the video (0+ / 0-)

    This is a membraneless battery, there are no plates, and the materials do not have to be mechanically separated. They separate and mix all on their own based on charge state.

    They can handle HUGE current flows, and they're dirt cheap, relatively speaking.

    The battery is unlike any other. The electrodes are molten metals, and the electrolyte that conducts current between them is a molten salt. This results in an unusually resilient device that can quickly absorb large amounts of electricity. The electrodes can operate at electrical currents "tens of times higher than any [battery] that's ever been measured," says Donald Sadow­ay, a materials chemistry professor at MIT and one of the battery's inventors. What's more, the materials are cheap, and the design allows for simple manufacturing.

    Can you help me make Green Planet Heroes happen?

    by radical simplicity on Tue Apr 29, 2014 at 08:40:30 AM PDT

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    •  Re (0+ / 0-)

      1. The flow battery link in the diary is not to the TED talk you're talking about. It's to a completely different technology based on quinones.

      2. I can't watch videos here, but I looked up info about the battery elsewhere (link), and there's nothing to suggest it's a flow battery, just a molten salt battery like a zebra.

      3. You made a claim about "flow batteries" in general. What you described is nothing like flow batteries in general.

      4. The stats cited in the comments by gmoke for the battery in the TED talk are unimpressive to say the least. I went and looked up the wattage for the cubic meter cell: 8.75kW. That's 8.75W/l. A few percent the volumetric power density of lithium ion batteries. That is not in any way, shape or form a "high rate" battery like you describe it. A battery large enough to run a single Tesla Roadster would be the size of a cabin.

      The day I'll consider justice blind is the day that a rape defendant's claim of "She consented to the sex" is treated by the same legal standards as a robbery defendant's claim of "He consented to give me the money": as an affirmative defense.

      by Rei on Tue Apr 29, 2014 at 10:02:14 AM PDT

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      •  It's designed for low cost utility scale (0+ / 0-)

        storage, not vehicles.

        In addition, the battery performance increases with size. The table-top sized one currently heading into beta is 2MW.

        It's designed to be very low cost, modular, easy to manufacture and transport, with the ability to handle the current flows from utility-scale energy production and community-scale power draws with little to no loss of capacity after many thousands of cycles.

        They're targeting storage at under $100 per kilowatt-hour. Sodium sulfur batteries cost roughly $600 a kilowatt-hour, lithium-ion batteries cost closer to $1,000 a kilowatt-hour.

        Sorry if I got the terminology mixed up (re: flow), a quick glance at the video's image made me think it was the same one. I was wrong.

        Can you help me make Green Planet Heroes happen?

        by radical simplicity on Tue Apr 29, 2014 at 10:27:03 AM PDT

        [ Parent ]

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