Chemistry Times
Recent News |  Archives |  Tags |  About |  Newsletter |  Submit News |  Links |  Subscribe to ChemistryTimes.com RSS Feed Subscribe


More Articles
A galaxy of deceptionA galaxy of deception

All directions are not created equal for nanoscale heat sourcesAll directions are not created equal for nanoscale heat sources

Researchers pump up oil accumulation in plant leavesResearchers pump up oil accumulation in plant leaves

Around the world in 400,000 years: The journey of the red foxAround the world in 400,000 years: The journey of the red fox

Pressing the accelerator on quantum roboticsPressing the accelerator on quantum robotics

Engineering new vehicle powertrainsEngineering new vehicle powertrains

Stunning finds from ancient Greek shipwreckStunning finds from ancient Greek shipwreck

Active aging is much more than exerciseActive aging is much more than exercise

Making oxygen before lifeMaking oxygen before life

Gut bacteria, artificial sweeteners and glucose intoleranceGut bacteria, artificial sweeteners and glucose intolerance

Are the world's religions ready for ET?Are the world's religions ready for ET?

Study: New device can slow, reverse heart failureStudy: New device can slow, reverse heart failure

Researchers demonstrate direct fluid flow influences neuron growthResearchers demonstrate direct fluid flow influences neuron growth

Protecting our processorsProtecting our processors

Recreating the stripe patterns found in animals by engineering synthetic gene networksRecreating the stripe patterns found in animals by engineering synthetic gene networks

A new quality control pathway in the cellA new quality control pathway in the cell

Communication without detoursCommunication without detours

First pictures of BRCA2 protein show how it works to repair DNAFirst pictures of BRCA2 protein show how it works to repair DNA

Chicxulub didn't do it all by itselfChicxulub didn't do it all by itself

Expedition finds Nemo can travel great distances to connect populationsExpedition finds Nemo can travel great distances to connect populations

Laying the groundwork for data-driven scienceLaying the groundwork for data-driven science

Parents drive kids' car choicesParents drive kids' car choices

Hold on, tiger momHold on, tiger mom

Nature's designs inspire research into new light-based technologiesNature's designs inspire research into new light-based technologies

Missing piece found to help solve concussion puzzleMissing piece found to help solve concussion puzzle

Biologists delay the aging process by 'remote control'Biologists delay the aging process by 'remote control'

Geography matters: Model predicts how local 'shocks' influence U.S. economyGeography matters: Model predicts how local 'shocks' influence U.S. economy

Identified for the first time what kind of explosive has been used after the detonationIdentified for the first time what kind of explosive has been used after the detonation

Copied from nature: Detecting software errors via genetic algorithmsCopied from nature: Detecting software errors via genetic algorithms

Renewable battery cathode formed from waste (3/27/2012)

Tags:
batteries, cathodes

Researchers have designed a battery cathode made of lignin byproducts from the pulp and paper industry, which may lead to cheaper and safer electrodes. This new, rechargeable battery cathode is comparable to other cathodes that require precious metals or rare, raw materials.

Grzegorz Milczarek from Poznan University of Technology in Poznan, Poland, and Olle Inganäs from Linköping University in Linköping, Sweden, combined lignin derivatives with a polymer known as polypyrrole to construct this device. Their research appears in the 23 March issue of the journal Science, which is published by AAAS, the nonprofit science society.

"The advantage of using a renewable material for charge storage is the enormous amount of this material that is already being produced on Earth by growing plants, which contain about 20 to 30 percent lignin," Inganäs says. "It is also a low-value material, currently being used for combustion. Lithium-ion batteries, on the other hand, require metal oxides and some of those materials, such as cobalt, are rather rare."

Lignin is the second most common polymer produced in nature by living organism (the most common being cellulose.) And lignin derivatives can be found in abundance in "brown liquor," the waste product left over from paper processing.

"When processing wood to make paper, lignin is extracted to leave cellulose," explains Inganäs. "It leaves a residue of brown or black liquor, depending on the chemistry being used."

As the two researchers show in their study, the insulating qualities of such lignin derivatives can be combined with the conductivity of polypyrrole to create a composite material that effectively holds an electric charge.

Milczarek and Inganäs describe how a class of organic compounds known as quinones allows the lignin derivatives to shed a proton and store this electric charge in its place. The polypyrrole is able to hold on to that loose proton until the charge is released and the proton returns to the quinone group of the lignin derivative.

These rechargeable batteries are still limited, according to the researchers, because they slowly lose their electric charge as they sit idly. But, Milczarek and Inganäs also found that various lignin derivatives perform differently in the cathode, depending on how they are processed.

And this observation means that there is plenty of room for optimizing these batteries, and researchers might get more of a charge from them by trying various lignin derivatives.

Note: This story has been adapted from a news release issued by the American Association for the Advancement of Science

Post Comments:

Search
New Articles
Research aims to develop new, more efficient catalytic materials

Smart, eco-friendly new battery to solve problemsSmart, eco-friendly new battery to solve problems

On the road to artificial photosynthesisOn the road to artificial photosynthesis

How to make stronger, 'greener' cement

Solar cell compound probed under pressureSolar cell compound probed under pressure

Longstanding bottleneck in crystal structure prediction solvedLongstanding bottleneck in crystal structure prediction solved

Harvesting hydrogen fuel from the Sun using Earth-abundant materialsHarvesting hydrogen fuel from the Sun using Earth-abundant materials

2-D materials' crystalline defects key to new properties

Pressure mounts on FDA and industry to ensure safety of food ingredients

'Funnel' attracts bonding partners to biomolecule'Funnel' attracts bonding partners to biomolecule

Los Alamos researchers uncover properties in nanocomposite oxide ceramics for reactor fuelLos Alamos researchers uncover properties in nanocomposite oxide ceramics for reactor fuel

'Multi-spectra glasses' for scanning electron microscopy'Multi-spectra glasses' for scanning electron microscopy

Milestone in chemical studies of superheavy elementsMilestone in chemical studies of superheavy elements

Team improves solar-cell efficiencyTeam improves solar-cell efficiency

Progress in materials scienceProgress in materials science



Archives
October 2014
September 2014
August 2014
July 2014
June 2014
May 2014
April 2014
March 2014
February 2014
January 2014
December 2013
November 2013
October 2013
September 2013
August 2013
July 2013
June 2013
May 2013
April 2013
March 2013
February 2013
January 2013
December 2012
November 2012
October 2012
September 2012
August 2012
July 2012
June 2012
May 2012
April 2012
March 2012
February 2012
January 2012
December 2011
November 2011
October 2011
September 2011
August 2011
July 2011
June 2011
May 2011
April 2011
March 2011
February 2011
January 2011
December 2010
November 2010
October 2010
September 2010
August 2010
July 2010
June 2010
May 2010
April 2010
March 2010
February 2010
January 2010
December 2009
November 2009
October 2009
September 2009
August 2009
July 2009
June 2009
May 2009
April 2009
March 2009
February 2009
January 2009
December 2008
November 2008
October 2008
September 2008
August 2008
July 2008
June 2008
May 2008
April 2008
March 2008
February 2008
January 2008
December 2007
November 2007
October 2007
September 2007
August 2007


Science Friends
Agricultural Science
Astronomy News
Sports Tech
Biology News
Biomimicry Science
Cognitive Research
Tissue Engineering
Cancer Research
Cybernetics Research
Electonics Research
Forensics Report
Fossil News
Genetic Archaeology
Genetics News
Geology News
Microbiology Research
Nanotech News
Parenting News
Physics News


  Archives |  Submit News |  Advertise With Us |  Contact Us |  Links
Use of this site constitutes acceptance of our Terms of Service and Privacy Policy. All contents © 2000 - 2015 Web Doodle, LLC. All rights reserved.