Michel Jullian wrote: > > > 300 watt-hours per kilogram, twice the energy density of traditional > > lithium ion batteries. > > Ok this makes the range acceptable (same as claimed by EEStor anyway). They > also claim nearly acceptable lifetime (thousands of recharges vs 500), but > there is no indication that we won't have to wait an hour or so at the > filling station. Right, about 10 times the capability of lead-acid.
For off-grid home-use storage from Solar PV, Wind, or MicroHydro tec., they have a lot of potenial. :-) This article that separates Electrostatic Capacitors from Energy Storage Capacitors is enlightening: http://electrochem.cwru.edu/ed/encycl/art-c03-elchem-cap.htm "Electrochemical capacitors are a special kind of capacitor based on charging and discharging the interfaces of high specific-area materials such as porous carbon materials or porous oxides of some metals. They can store electric charge and corresponding energy at high densities in an highly reversible way, as does a regular capacitor, and hence can be operated at specific power densities (in watts/kg) substantially higher than can most batteries. Their capacitance for a given size of the device is thus much higher, by a factor of 10,000 or so, than those achievable with regular capacitors. For this reason proprietary names such as "Supercapacitors" or "Ultracapacitors" have been coined to describe their performance." Fred > > Michel > > ----- Original Message ----- > From: "Frederick Sparber" <[EMAIL PROTECTED]> > To: "vortex-l" <[email protected]> > Sent: Wednesday, March 22, 2006 9:21 AM > Subject: Re: Future batteries > > > > http://www.off-grid.net/common/mailme.php?id=538 > > > > "It is an early prototype of his SlimCell battery and powerful enough to > > energize a transistor radio. The SlimCell does away with Volta's > > 200-year-old liquid chemistry by using flexible and extremely thin solid > > laminates that can be manufactured cheaply, rolled up into a tube or > > molded right into a handheld device. "We have to change the image of a > > battery. Stop thinking soda cans. Start thinking potato-chip bags," says > > Sadoway. Solid-state, paper-thin batteries have been an unrealized goal of > > industry for a decade. Chemists at firms such as 3M struggled to find a > > solid that conducts ions with the ease of a liquid or gel. In the > > mid-1990s Sadoway, a Canadian metallurgist who has spent his entire career > > teaching at MIT, was searching with his students for ways to reduce air > > pollution in Los Angeles. One idea was electric cars, but a lithium ion > > battery of the size needed doesn't make any sense, as it would require its > > own cooling system and wouldn't work well in extreme clima! > > tes. Solid electrolytes, as elusive as they seemed, would be far lighter, > > safer and more versatile. He pitched the problem to MIT materials > > scientist Anne Mayes, who suggested a recipe: two polymers, > > polyoxyethylene and polylauryl methacrylate, woven together like strands > > of cooked spaghetti and brushed with a highly conductive goop called > > polyethylene oxide. The result is a dry electrolyte that is about the > > thickness of cellophane but could ultimately be made as thin as one > > micron, a thousandth of a millimeter. Prototypes of Sadoway's SlimCell can > > deliver 300 watt-hours per kilogram, twice the energy density of > > traditional lithium ion batteries." >
