Nairaland Forum

Welcome, Guest: Join Nairaland / Login / Trending / Recent / New
Stats: 1259337 members, 1700849 topics. Date: Friday, 24 October 2014 at 04:26 PM

Technology Updates! - Science/Technology - Nairaland

Nairaland Forum / Science/Technology / Technology Updates! (14187 Views)

Live Updates On Today's Solar Eclipse / Twitter Updates Android And Ios Apps, Now Lets You See What's Trending Around Th / 2013 Technology Updates. (1) (2) (3) (4)

(0) (1) (2) (3) (Reply) (Go Down)

Technology Updates! by skydancer: 8:18am On Dec 18, 2009
Paper-thin Batteries Made from Algae

Imagine wrapping paper that could be a gift in and of itself because it lights up with words like "Happy Birthday." That is one potential application of a new biodegradable battery made of cellulose, the stuff of paper.

Scientists worldwide are striving to develop thin, flexible, lightweight, inexpensive, environmentally friendly batteries made entirely from nonmetal parts. Among the most promising materials for these batteries are conducting polymers.

However, until now these have impractical for use in batteries — for instance, their ability to hold a charge often degrades over use.

Easy to make

The key to this new battery turned out to be an often bothersome green algae known as Cladophora. Rotting heaps of this hairlike freshwater plant throughout the world can lead to unsightly, foul-smelling beaches.

This algae makes an unusual kind of cellulose typified by a very large surface area, 100 times that of the cellulose found in paper. This allowed researchers to dramatically increase the amount of conducting polymer available for use in the new device, enabling it to better recharge, hold and discharge electricity.

"We have long hoped to find some sort of constructive use for the material from algae blooms and have now been shown this to be possible," said researcher Maria Strømme, a nanotechnologist at Uppsala University in Sweden. "This creates new possibilities for large-scale production of environmentally friendly, cost-effective, lightweight energy storage systems."

The new batteries consisted of extremely thin layers of conducting polymer just 40 to 50 nanometers or billionths of a meter wide coating algae cellulose fibers only 20 to 30 nanometers wide that were collected into paper sheets.

"They're very easy to make," Strømme said.

Quick to charge

They could hold 50 to 200 percent more charge than similar conducting polymer batteries, and once better optimized, they might even be competitive with commercial lithium batteries, the researchers noted. They also recharged much faster than conventional rechargeable batteries — while a regular battery takes at least an hour to recharge, the new batteries could recharge in anywhere from eight minutes to just 11 seconds.

The new battery also showed a dramatic boost in the ability to hold a charge over use. While a comparable polymer battery showed a 50 percent drop in the amount of charge it could hold after 60 cycles of discharging and recharging, the new battery showed just a 6 percent loss through 100 charging cycles.

"When you have thick polymer layers, it's hard to get all the material to recharge properly, and it turns into an insulator, so you lose capacity," said researcher Gustav Nyström, an electrochemist at Uppsala University. "When you have thin layers, you can get it fully discharged and recharged."

Flexible electronics

The researchers suggest their batteries appear well-suited for applications involving flexible electronics, such as clothing and packaging.

"We're not focused on replacing lithium ion batteries — we want to find new applications where batteries are not used today," Strømme told LiveScience. "What if you could put batteries inside wallpaper to charge sensors in your home? If you could put this into clothes, can you couple that with detectors to analyze sweat from your body to tell if there's anything wrong?"

Future directions of research include seeing how much charge these batteries lose over time, a problem with polymer batteries and all batteries in general. They also want to see how much they can scale up these batteries, "see if we can make them much, much larger," Strømme said.

The scientists detailed their last month in the journal Nano Letters.

5 Likes 1 Share

Re: Technology Updates! by skydancer: 8:21am On Dec 18, 2009
Please if you have some updates, post it here. Thanks!

1 Like

 
Re: Technology Updates! by hunter121: 8:29am On Apr 15, 2012
Imagine wrapping paper that could be a gift in and of itself because it lights up with words like "Happy Birthday." That is one potential application of a new biodegradable battery made of cellulose, the stuff of paper.

3 Likes

Re: Technology Updates! by Daovris: 2:53pm On May 09, 2012
When you have thick polymer layers, it's hard to get all the material to recharge properly, and it turns into an insulator, so you lose capacity," said researcher Gustav Nyström, an electrochemist at Uppsala University. "When you have thin layers, you can get it fully discharged and recharged."
Re: Technology Updates! by yukochuna: 3:22pm On May 18, 2012
Thank you for sharing, I wish you to find a more satisfactory answer.I wish you good luck.
Re: Technology Updates! by tpia5: 11:53pm On May 20, 2012
did anyone else catch that pebble thingy here or was it only me?
Re: Technology Updates! by yamakuza: 10:14am On May 21, 2012
tpia@:
did anyone else catch that pebble thingy here or was it only me?

what pebble? Na only u oh!
Re: Technology Updates! by tpia5: 7:35pm On May 21, 2012
seems to be the case.
Re: Technology Updates! by yamakuza: 10:26am On May 22, 2012
tpia@:
seems to be the case.

lost some marbles pebbles?

Whats with the soliloquy?

grin

1 Like

Re: Technology Updates! by tpia5: 6:16pm On May 22, 2012
just wondering, that's all.


surprised, too.
Re: Technology Updates! by yamakuza: 6:29pm On May 22, 2012
tpia@:
just wondering, that's all.


surprised, too.
oya, stop beating around the bush. Where did you see the pebbles?
Re: Technology Updates! by tpia5: 6:52pm On May 22, 2012
saw them somewhere far. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .


anyway, wbb.
Re: Technology Updates! by yamakuza: 6:56pm On May 22, 2012
Hmmn, waiting . . .
Re: Technology Updates! by tpia5: 2:56am On May 23, 2012
it was a web-based application(?) i saw somewhere.

generated a lot of publicity but didnt reach nl it seems.

maybe the publicity was low key.

1 Like

Re: Technology Updates! by yamakuza: 3:52am On May 23, 2012
tpia@:
it was a web-based application(?) i saw somewhere.

generated a lot of publicity but didnt reach nl it seems.

maybe the publicity was low key.

oh, ok.

For a moment there, i was really getting scared.

Its like a 3D game or something? What made it special?

Do post the link as soon as you have it.
Re: Technology Updates! by tpia5: 4:07am On May 23, 2012
ok.

its not a game- its something that works with one of these technology gadgets.
 
 
 
Re: Technology Updates! by wol3: 4:45pm On Jun 04, 2012
 
 
Re: Technology Updates! by saritak102: 11:00am On Jul 12, 2012
nice...........
 
 
 
 
 
 
 
Re: Technology Updates! by iadebayodare: 6:07pm On Sep 22, 2012
Skypaste (Let’s get skypasting on skypaste!)
Skypaste (www.skypaste.com) is totally designed for the placement and viewing of advertisements of all kind. Access to view these advertisements is open to all and sundry, but only registered users ‘Skypaster(s)’ can place adverts.
Simply, with an upload in JPEG, GIF or PNG, large and small scale businesses, marketing agents, entertainers, graphic designer, academics, politicians among others can ‘skypaste’ business adverts, fliers of upcoming event, seminar or conference, opportunities, memo, campaign fliers e.t.c . and share with millions of users on the internet for FREE. Seem great? Yes! It is!
Aside from the foregoing, using skypaste as a medium to paste and share your business adverts, events and campaign fliers make you reachout to a largest audience; hereby increased business patronage and greater number of people following your camp rapidly set in among others.
Are you still struggling with legal issues attached to placement of fliers and billboards around the city or you run too much cost on your publicity? No doubt, Skypaste is for YOU! save printing cost, defacing of the cities’ beauty, government and individual property, reach beyond your immediate society at no cost, by skypasting and sharing the soft copy of your fliers on skypaste.
Perhaps you are at the sky already? Don’t relax, there are many steps ahead because with skypaste, “the sky is just the beginning.” Let’s get skypasting on skypaste!
www.skypaste.com
contact@skypaste.com
@skypaste
www.facebook.com/skypaste

1 Like

(0) (1) (2) (3) (Reply)

Thread For Facts.... / Weird Things Humans Do Daily, And Why / Internet-enabled Pillow Connects Long-Distance Lovers

(Go Up)

Sections: politics (1) business autos (1) jobs (1) career education (1) romance computers phones travel sports fashion health
religion celebs tv-movies music-radio literature webmasters programming techmarket

Links: (0) (1) (2) (3) (4) (5) (6) (7) (8) (9)

Nairaland - Copyright © 2005 - 2014 Oluwaseun Osewa. All rights reserved. See Nairalist and How To Advertise. 51
Disclaimer: Every Nairaland member is solely responsible for anything that he/she posts or uploads on Nairaland.