Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Ancient Red Dye Powers New “Green” Battery

12.12.2012
CCNY chemists use plant extract in eco-friendly, sustainable lithium-ion battery
Rose madder – a natural plant dye once prized throughout the Old World to make fiery red textiles – has found a second life as the basis for a new “green” battery.

Chemists from The City College of New York teamed with researchers from Rice University and the U.S. Army Research Laboratory to develop a non-toxic and sustainable lithium-ion battery powered by purpurin, a dye extracted from the roots of the madder plant (Rubia species).

More than 3,500 years ago, civilizations in Asia and the Middle East first boiled madder roots to color fabrics in vivid oranges, reds and pinks. In its latest technological incarnation, the climbing herb could lay the foundation for an eco-friendly alternative to traditional lithium-ion (Li-ion) batteries. These batteries charge everything from your mobile phone to electric vehicles, but carry with them risks to the environment during production, recycling and disposal.

“Purpurin,” on the other hand, said team member and City College Professor of Chemistry George John, “comes from nature and it will go back to nature.” The team reports their results in the journal Nature’s online and open access publication, Scientific Reports, on December 11, 2012.

Most Li-ion batteries today rely on finite supplies of mined metal ores, such as cobalt. “Thirty percent of globally produced cobalt is fed into battery technology,” noted Dr. Leela Reddy, lead author and a research scientist in Professor Pulickel Ajayan’s lab in the Department of Mechanical Engineering and Materials Science at Rice University. The cobalt salt and lithium are combined at high temperatures to make a battery’s cathode, the electrode through which the electric current flows.

Mining cobalt metal and transforming it, however, is expensive, Dr. Reddy explained. Fabricating and recycling standard Li-ion batteries demands high temperatures, guzzling costly energy, especially during recycling. “In 2010, almost 10 billion lithium-ion batteries had to be recycled,” he said .

Production and recycling also pumps an estimated 72 kilograms of carbon dioxide – a greenhouse gas – into the atmosphere for every kilowatt-hour of energy in a Li-ion battery, he noted. These grim facts have fed a surging demand to develop green batteries, said Dr. Reddy.

Fortunately, biologically based color molecules, like purpurin and its relatives, seem pre-adapted to act as a battery’s electrode. In the case of purpurin, the molecule’s six-membered (aromatic) rings are festooned with carbonyl and hydroxyl groups adept at passing electrons back and forth, just as traditional electrodes do. “These aromatic systems are electron-rich molecules that easily coordinate with lithium,” explained Professor John.

Moreover, growing madder or other biomass crops to make batteries would soak up carbon dioxide and eliminate the disposal problem – without its toxic components, a lithium-ion battery could be thrown away.

Best of all, purpurin also turns out to be a no-fuss ingredient. “In the literature there are one or two other natural organic molecules in development for batteries, but the process to make them is much more tedious and complicated,” noted Professor John.

Made and stored at room temperature, the purpurin electrode is made in just a few easy steps: dissolve the purpurin in an alcohol solvent and add lithium salt. When the salt’s lithium ion binds with purpurin the solution turns from reddish yellow to pink. Remove the solvent and it's ready. “The chemistry is quite simple,” coauthor and City College postdoctoral researcher Dr. Subbiah Nagarajan explained.

The team estimates that a commercial green Li-ion battery may be only a few years away, counting the time needed to ramp up purpurin’s efficiency or hunt down and synthesize similar molecules. “We can say it is definitely going to happen, and sometime soon, because in this case we are fully aware of the mechanism,” said Professor John.

“When you can generate something new or unheard of, you think of chemistry in a different way,” he added. “That a natural material or dye can be used for a battery, that is exciting, even for me.”

Coauthors include postdoctoral researcher Subbiah Nagarajan, facilities manager Padmanava Pradhan, and graduate student Swapnil Jadhav of the City College of New York; visiting scholar Porramate Chumyim, former postdoctoral fellow Sanketh Gowda and Professor Pulickel Ajayan of Rice University; and Madan Dubey of the U.S. Army Research Laboratory.

The National Science Foundation and the U.S. Army Research Office funded this research.

Reference:

Reddy, A.L.M. et al. Lithium storage mechanisms in purpurin based
organic lithium ion battery electrodes. Sci. Rep. 2, 960; doi:10.1038/srep00960
11 Dec 2012.

Online:
Professor George John
Rice University Ajayan Lab (Incl. L. Reddy)
Media Contact
Jessa Netting
P | 212-650-7615
E | jnetting@ccny.cuny.edu

Jessa Netting | EurekAlert!
Further information:
http://www2.ccny.cuny.edu/

More articles from Life Sciences:

nachricht Tag it EASI – a new method for accurate protein analysis
19.06.2018 | Max-Planck-Institut für Biochemie

nachricht How to track and trace a protein: Nanosensors monitor intracellular deliveries
19.06.2018 | Universität Basel

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Overdosing on Calcium

Nano crystals impact stem cell fate during bone formation

Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...

Im Focus: AchemAsia 2019 will take place in Shanghai

Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.

Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...

Im Focus: First real-time test of Li-Fi utilization for the industrial Internet of Things

The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.

Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.

Im Focus: Sharp images with flexible fibers

An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.

Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...

Im Focus: Photoexcited graphene puzzle solved

A boost for graphene-based light detectors

Light detection and control lies at the heart of many modern device applications, such as smartphone cameras. Using graphene as a light-sensitive material for...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Munich conference on asteroid detection, tracking and defense

13.06.2018 | Event News

2nd International Baltic Earth Conference in Denmark: “The Baltic Sea region in Transition”

08.06.2018 | Event News

ISEKI_Food 2018: Conference with Holistic View of Food Production

05.06.2018 | Event News

 
Latest News

Carbon nanotube optics provide optical-based quantum cryptography and quantum computing

19.06.2018 | Physics and Astronomy

How to track and trace a protein: Nanosensors monitor intracellular deliveries

19.06.2018 | Life Sciences

New material for splitting water

19.06.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>