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AZskibum
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Maybe for supplemental power
AZskibum   5/28/2014 10:20:09 AM
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This is an interesting concept, but looks more suited for supplemental power -- extending operating time beyond what the normal lithium ion battery delivers -- rather than the primary energy storage device.

R_Colin_Johnson
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Re: Maybe for supplemental power
R_Colin_Johnson   5/28/2014 11:38:44 AM
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 looks more suited for supplemental power-AZskibum


You are right now, since its only 1/10th the density of Li-ion today, but the researchers claim that they could rival NiMH very soon and current Li-ion in just a few years. Of course, Li-ion will have moved on by then to even higher densities, and others like Li-air will be on the scene too. Nevertheless for devices that have significantly more volume in their cases than their existing Li-ion battery takes up, building the battery into the case could become the primary power source. 

Sanjib.A
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My wish might get fulfilled!
Sanjib.A   5/28/2014 2:10:51 PM
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In the mid of last month on 4/18 I posted a comment; the link is provided below:

http://www.eetimes.com/messages.asp?piddl_msgthreadid=44785&piddl_msgid=296886#msg_296886

I mentioned: "...there should have been a technology such that the display of the mobile device (or a transparent screen on it...the screen protector itself) to be able to harvest electrical energy from the solar energy to charge the battery of the device, so that my mobile will get charged on the way to my office..."

Hope to see a product around this idea sooner than I expected!!! But, did they stole my idea?.... LOL

Btw...what is the time taken by the super-cap to get completely charged with solar touch scree (patented by Apple)and how long the supercap would hold the charge on typical phone usage?

selinz
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Re: Maybe for supplemental power
selinz   5/28/2014 2:42:41 PM
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Similar arguments are made for embedded passives. The super caps either have to get higher DConstants or thinner. Making them thinner reduces breakdown voltage. So in the end, you really can't get there from here. They are useful for what Caps are typically useful for. mitigating current transients. Bah humbug. ;-)

 

Susan Rambo
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Re: My wish might get fulfilled!
Susan Rambo   5/28/2014 2:50:54 PM
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You know what they say about great minds thinking alike...

I hope they get this technology going sooner rather than later.

Max The Magnificent
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Re: My wish might get fulfilled!
Max The Magnificent   5/28/2014 2:59:14 PM
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@susan: You know what they say about great minds thinking alike...

I love proverbs because they so often come in pairs:

"Great minds think alike" and "Fools seldom differ"

"Many hands make light work" and "Too many cooks spoil the broth"

Can you think of any more?

R_Colin_Johnson
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Re: Maybe for supplemental power
R_Colin_Johnson   5/28/2014 3:14:16 PM
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Bah humbug. ;-)  selinz


I would have agreed with you before speaking with the Vanderbilt researchers, and they spoke ab out solutions to all the problems you mention including higher DC and making them very thin. There is more info in a paper at:

http://pubs.acs.org/doi/abs/10.1021/nl500531r

But its not free. I'll inquire with the author to see if he's got more/better descriptions of how he plans to achieve his goals and get back to you.

R_Colin_Johnson
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Re: My wish might get fulfilled!
R_Colin_Johnson   5/28/2014 3:25:45 PM
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what is the time taken by the super-cap to get completely charged with solar touch scree (patented by Apple)and how long the supercap would hold the charge on typical phone usage?--Sanjib.A

 

Sorry, but Apple's patent is separate from Vanderbilt's work, so no metrics there. The Vanderbilt author claims to have a supercap in his office which has held its charge for two years, but no metrics yet on how long a smartphone-case sized unit would last since it depends on how much bigger the case is than a standart Li-ion battery. If the case is 10-times bigger than the Li-ion batter it houses now, then I would assume it would last just as long in use.

Doug_S
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This can't replace a battery
Doug_S   5/28/2014 4:16:31 PM
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If it stores 10x less energy per volume than a battery, how can it replace a battery?  Look at the teardown of any modern smartphone, you'll see the battery comprises well over 10% of the volume.

R_Colin_Johnson
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Re: This can't replace a battery
R_Colin_Johnson   5/28/2014 4:36:48 PM
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You are right with the technology in its current incarnation, but the researchers claim that they are improving it enough that the volume of the case could contain a supercap large enough to power mobile devices in the future. Their short-term goal is to rival NiMH battery's density with Li-ion in their sights within a few years.

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