Research & Development World

  • R&D World Home
  • Topics
    • Aerospace
    • Automotive
    • Biotech
    • Careers
    • Chemistry
    • Environment
    • Energy
    • Life Science
    • Material Science
    • R&D Management
    • Physics
  • Technology
    • 3D Printing
    • A.I./Robotics
    • Software
    • Battery Technology
    • Controlled Environments
      • Cleanrooms
      • Graphene
      • Lasers
      • Regulations/Standards
      • Sensors
    • Imaging
    • Nanotechnology
    • Scientific Computing
      • Big Data
      • HPC/Supercomputing
      • Informatics
      • Security
    • Semiconductors
  • R&D Market Pulse
  • R&D 100
    • Call for Nominations: The 2025 R&D 100 Awards
    • R&D 100 Awards Event
    • R&D 100 Submissions
    • Winner Archive
    • Explore the 2024 R&D 100 award winners and finalists
  • Resources
    • Research Reports
    • Digital Issues
    • R&D Index
    • Subscribe
    • Video
    • Webinars
  • Global Funding Forecast
  • Top Labs
  • Advertise
  • SUBSCRIBE

Look to Melanin for Better Batteries

By R&D Editors | May 18, 2016

Melanin is best known as the pigment that dictates our skin tones, but it is found just about everywhere — in our brains, in our hair. It is even found in cuttlefish. But as abundant as melanin is, its exact macromolecular chemical structure is surprisingly not well understood.

Though researchers have extensively studied the chemical structure of individual melanin molecules for more than 70 years, relatively little is known about the molecular building blocks that form complex melanin pigments. But a team of researchers from Carnegie Mellon has discovered that the chemical structure of melanin on a macromolecular scale exhibits, amongst other shapes, a four-membered ring — in other words, a chemical structure that may be conducive to creating certain kinds of batteries based on natural melanin pigments.

“Functionally, different types of melanin molecules have quite different chemistries, so putting them together is a little like solving a jigsaw puzzle, with each molecule a puzzle piece,” explains Assistant Professor of Mechanical Engineering and co-author of the study Venkat Viswanathan. “You could take any number of these pieces and mix and match them, even stack them on top of each other. So what we researched was, which of these arrangements is really correct?”

There are several types of melanin molecule, and each has a different function depending on its chemical structure. When these molecules bind to form a macromolecular structure, or a polymer, these polymers can be arranged to create a potential battery material. Based on the readings the researchers gained from their experiment, they discovered that a tetramer structure, a four-membered ring composed of larger molecules, appears to be consistent with the structural model of melanin macromolecules.

“Only the tetramer structure had the correct number of exposed nitrogens to bind with the sodium,” says Associate Professor of Materials Science and Engineering and Biomedical Engineering Chris Bettinger, “and the voltage signals we received are consistent with what you would observe if you believe that the tetramer is the correct structural model.”

The research team — which included Bettinger, materials science engineering postdoctoral researcher Young Jo Kim, and Jay Whitacre, professor of materials science and engineering and of engineering and public policy — was able to discover the tetramer structure of melanin by using it as a battery’s cathode. However, in doing so, they also discovered that melanin exhibits a two-voltage plateau characteristic of normal battery materials, while outputting a surprisingly high voltage.

“The voltage we got out was very, very high — comparable to what you would get for the best sodium-based cathode materials we would use in a battery,” says Viswanathan. “So this was surprising to us: that we could take this material from biology, and it could function potentially as a very good cathode material.”

The full article, “Evidence of porphyrin-like structures in natural melanin pigments using electrochemical fingerprinting,” appears in Advanced Materials. The research team also included visiting Ph.D. student Abhishek Khetan, Associate Research Professor Wei Wu of Carnegie Mellon’s School of Computer Science, and collaborator Sang-Eun Chun of the University of Oregon.

Source: Carnegie Mellon University 

Related Articles Read More >

2025 R&D layoffs tracker tops 92,000
Efficiency first: Sandia’s new director balances AI drive with deterrent work
Ex-Google CEO details massive AI energy needs at House hearing, advocates for fusion and SMR R&D
Floating solar mats clean polluted water — and generate power
rd newsletter
EXPAND YOUR KNOWLEDGE AND STAY CONNECTED
Get the latest info on technologies, trends, and strategies in Research & Development.
RD 25 Power Index

R&D World Digital Issues

Fall 2024 issue

Browse the most current issue of R&D World and back issues in an easy to use high quality format. Clip, share and download with the leading R&D magazine today.

Research & Development World
  • Subscribe to R&D World Magazine
  • Enews Sign Up
  • Contact Us
  • About Us
  • Drug Discovery & Development
  • Pharmaceutical Processing
  • Global Funding Forecast

Copyright © 2025 WTWH Media LLC. All Rights Reserved. The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of WTWH Media
Privacy Policy | Advertising | About Us

Search R&D World

  • R&D World Home
  • Topics
    • Aerospace
    • Automotive
    • Biotech
    • Careers
    • Chemistry
    • Environment
    • Energy
    • Life Science
    • Material Science
    • R&D Management
    • Physics
  • Technology
    • 3D Printing
    • A.I./Robotics
    • Software
    • Battery Technology
    • Controlled Environments
      • Cleanrooms
      • Graphene
      • Lasers
      • Regulations/Standards
      • Sensors
    • Imaging
    • Nanotechnology
    • Scientific Computing
      • Big Data
      • HPC/Supercomputing
      • Informatics
      • Security
    • Semiconductors
  • R&D Market Pulse
  • R&D 100
    • Call for Nominations: The 2025 R&D 100 Awards
    • R&D 100 Awards Event
    • R&D 100 Submissions
    • Winner Archive
    • Explore the 2024 R&D 100 award winners and finalists
  • Resources
    • Research Reports
    • Digital Issues
    • R&D Index
    • Subscribe
    • Video
    • Webinars
  • Global Funding Forecast
  • Top Labs
  • Advertise
  • SUBSCRIBE