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Old 04-03-2017, 01:27 PM
gary
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Lightbulb New lithium/sodium-glass battery shows promise says lithium-ion battery co-inventor

Mark Anderson in a 3 March 2017 article at the Institute of Electrical
and Electronics Engineers Spectrum Magazine web site, reports on
a novel lithium or sodium glass battery that might displace the lithium
ion battery.

Promising new battery technology announcements have come and gone
in the past, but this one was made by John Goodenough of MIT,
co-inventor of the lithium-ion battery.

Quote:
Originally Posted by Mark Anderson, IEEE
Electric car purchases have been on the rise lately, posting an estimated 60 percent growth rate last year. They’re poised for rapid adoption by 2022, when EVs are projected to cost the same as internal combustion cars. However, these estimates all presume the incumbent lithium-ion battery remains the go-to EV power source. So, when researchers this week at the University of Texas at Austin unveiled a new, promising lithium- or sodium-glass battery technology, it threatened to accelerate even rosy projections for battery-powered cars.

“I think we have the possibility of doing what we’ve been trying to do for the last 20 years,” says John Goodenough, co-inventor of the now ubiquitous lithium-ion battery and emeritus professor at the Cockrell School of Engineering at the University of Texas, Austin. “That is to get an electric car that will be competitive in cost and convenience with the internal combustion engine.” Goodenough added that this new battery technology could also store intermittent solar and wind power on the electric grid.

Yet, the world has seen alleged game-changing battery breakthroughs come to naught before. In 2014, for instance, Japanese researchers offered up a cotton-based (!) new battery design that was touted as “energy dense, reliable, safe and sustainable.” And if the cotton battery is still going to change the world, its promoters could certainly use a new wave of press and media releases, as an internet search on their technology today produces links that are no more current than 2014-15 vintage.

So, on whose authority might one claim a glass battery could be any different?

For starters, Donald Sadoway’s. Sadoway, a preeminent battery researcher and MIT materials science and engineering professor, says, “When John Goodenough makes an announcement, I pay attention. He’s tops in the field and really a fantastic scientist. So, his pronouncements are worth listening to.”
Article here -
http://spectrum.ieee.org/energywise/...the-end-of-oil
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Old 04-03-2017, 01:58 PM
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I hope his story is Good Enough to make it commercially viable.

However, metallic sodium is very reactive with water (much more than Li), so the battery should be well sealed.
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Old 04-03-2017, 09:38 PM
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Read the links. The sodium is NOT in metallic form in these batteries, it is an ION so it's in solution.

All that is likely if catastrophically damaged is hot pile of yellow goo (the molten glass electrolyte). Maybe not something you want in your lap, but not a persistent source of fire.
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Old 06-03-2017, 06:22 PM
bigjoe (JOSEPH)
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re battery

Goodenough for sure!
bigjoe.
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Old 06-03-2017, 07:18 PM
Wavytone
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As an aside... If petrol had been proposed in the current era of safety and environmental management it would never have been adopted.
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Old 07-03-2017, 11:28 AM
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ZeroID (Brent)
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Quote:
Originally Posted by Wavytone View Post
Read the links. The sodium is NOT in metallic form in these batteries, it is an ION so it's in solution.

All that is likely if catastrophically damaged is hot pile of yellow goo (the molten glass electrolyte). Maybe not something you want in your lap, but not a persistent source of fire.
If I read the article correctly the glass is not liquid. Operating temp -20 to +60 C or am I missing something ?
I thought I spotted 'solid electrolyte' somewhere ....
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Old 07-03-2017, 02:50 PM
gary
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Quote:
Originally Posted by ZeroID View Post
If I read the article correctly the glass is not liquid. Operating temp -20 to +60 C or am I missing something ?
I thought I spotted 'solid electrolyte' somewhere ....
Hi Brent,

The electrolyte is solid.

The initial "Technical Field" and "Background" sections of the cited Patent
application provide additional detail for interested readers -
https://www.google.com/patents/US20160368777

Quote:
Originally Posted by U.S. Patent US Application 20160368777 A1
TECHNICAL FIELD

The disclosure provides a dried, water-solvated glass/amorphous solid that is an alkali-ion conductor and an electronic insulator with a large dielectric constant. The disclosure also provides electrochemical devices and processes that use this material, such as batteries, including rechargeable batteries, fuel cells, capacitors, electrolytic generation of chemical products, including hydrogen gas (H2), from water, and electronic devices. The electrochemical devices and products use a combination of ionic and electronic conduction. The disclosure also provides a water-solvated glass/amorphous solid that is a proton (H+) conductor and an electronic insulator.

BACKGROUND

Ionic conductors that are also electronic insulators are called electrolytes; they may be a liquid or a solid. Electrolytes are used in a variety of electrochemical devices, including not only those that store electric power as chemical energy in a rechargeable battery or those that release chemical energy as electric power in a fuel cell, but also those that store electric power as static electric energy in an electric-double-layer capacitor. Electric power that is released from an electric-energy store, whether from a chemical or an electrostatic store, is clean energy. Chemical energy stored in a fuel that is released as the heat of combustion is a less efficient process, and combustion is also accompanied by the release of gases that pollute the air and contribute to global warming.

An electrochemical cell contains an electrolyte between two electrodes, an anode and a cathode. A liquid electrolyte requires use of a separator of the two electrodes that is permeable by the liquid electrolyte; the separator prevents electronic contact between the two electrodes within the cell. A solid electrolyte may serve as both an electrolyte and a separator. In a rechargeable battery, the anode is a reductant; in a fuel cell, the anode catalyzes the separation of a reductant fuel into its electronic and ionic components. In both types of cells, the ionic component of the chemical reaction between two electrodes is transported to the cathode inside the cell in the electrolyte, but the electrolyte forces the electronic component to go to the cathode via an external circuit as an electronic current I at a voltage V to provide electric power P=IV for performance of work. Since the ionic conductivity in the electrolyte is much smaller than the electronic conductivity in a good metal, battery cells and fuel cells are fabricated with large-area electrodes and a thin electrolyte; the active electrode materials are fabricated to make electronic contact with a metallic current collector for fast transport of electrons between the active electrode particles and the external circuit as well as ionic contact with the electrolyte that transports ions between the electrodes inside the cell.

Solid electrolytes with a large dielectric constant may also be used in electronic devices as separators of liquid or gaseous reactants as well as of solid reactants.

Liquids are generally much better ionic conductors at room temperature than most known solids, which is why liquids are normally used as the electrolyte of a room-temperature device. However, in some applications a solid electrolyte may be strongly preferred. For example, the Li-ion rechargeable battery uses a flammable organic liquid as the electrolyte, and a solid electrolyte would be safer and might be capable of improving the density of energy stored without sacrificing the rate of charge and discharge. Moreover, if the solid electrolyte also contains electric dipoles that give it a high dielectric constant, it can store much more electric energy than a liquid in an electric capacitance of an electric double layer of a metal/electrolyte interface.
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