Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Stressed Out: Research Sheds New Light on Why Rechargeable Batteries Fail

02.10.2014

Pity the poor lithium ion. Drawn relentlessly by its electrical charge, it surges from anode to cathode and back again, shouldering its way through an elaborate molecular obstacle course. This journey is essential to powering everything from cell phones to cordless power tools. Yet, no one really understands what goes on at the atomic scale as lithium ion batteries are used and recharged, over and over again.

Michigan Technological University researcher Reza Shahbazian-Yassar has made it his business to better map the ion’s long, strange trip—and perhaps make it smoother and easier. His ultimate aim: to make better batteries, with more power and a longer life.


This color-enhanced image reveals how the structure of zinc-antimonide changes as lithium ions enter the anode. Anmin Nie image

Using transmission electron microscopy, Anmin Nie, a senior postdoctoral researcher in Shahbazian-Yassar’s research group, has recently documented what can happen to anodes as lithium ions work their way into them, and it’s not especially good. The research was recently published in the journal Nano Letters.

“We call it atomic shuffling,” says Shahbazian-Yassar, the Richard and Elizabeth Henes Associate Professor in Nanotechnology. “The layered structure of the electrode changes as the lithium goes inside, creating a sandwich structure: there is lots of localized expansion and contraction in the electrode crystals, which helps the lithium blaze a trail through the electrode.”

The atomic shuffling not only helps explain how lithium ions move through the anode, in this case a promising new material called zinc antimonide. It also provides a clue as to why most anodes made of layered materials eventually fail. “We showed that the ions cause a lot of local stress and phase transitions,” Anmin said.

The paper, “Lithiation-Induced Shuffling of Atomic Stacks,” is coauthored by Shahbazian-Yassar, Nie and graduate student Hasti Asayesh-Ardakani of Michigan Tech’s Department of Mechanical Engineering-Engineering Mechanics; Yingchun Cheng, Yun Han and Udo Schwingenschlogl of King Abdulla University of Science and Technology, in Saudi Arabia; Runzhe Tao, Farzad Mashayet and Robert Klie of the University if Illinois at Chicago; and Sreeram Vaddiraju of Texas A&M University.

The microscopy was conducted at the University of Illinois at Chicago.

Michigan Technological University (www.mtu.edu) is a leading public research university developing new technologies and preparing students to create the future for a prosperous and sustainable world. Michigan Tech offers more than 130 undergraduate and graduate degree programs in engineering; forest resources; computing; technology; business; economics; natural, physical and environmental sciences; arts; humanities; and social sciences.

Jennifer Donovan | Eurek Alert!
Further information:
http://www.mtu.edu/news/stories/2014/september/stressed-out-research-sheds-new-light-why-rechargeable-batteries-fail.html

More articles from Power and Electrical Engineering:

nachricht Nano-scale process may speed arrival of cheaper hi-tech products
09.11.2018 | University of Edinburgh

nachricht Nuclear fusion: wrestling with burning questions on the control of 'burning plasmas'
25.10.2018 | Lehigh University

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

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

Im Focus: UNH scientists help provide first-ever views of elusive energy explosion

Researchers at the University of New Hampshire have captured a difficult-to-view singular event involving "magnetic reconnection"--the process by which sparse particles and energy around Earth collide producing a quick but mighty explosion--in the Earth's magnetotail, the magnetic environment that trails behind the planet.

Magnetic reconnection has remained a bit of a mystery to scientists. They know it exists and have documented the effects that the energy explosions can...

Im Focus: A Chip with Blood Vessels

Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.

Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...

Im Focus: A Leap Into Quantum Technology

Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.

In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...

Im Focus: Research icebreaker Polarstern begins the Antarctic season

What does it look like below the ice shelf of the calved massive iceberg A68?

On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.

Im Focus: Penn engineers develop ultrathin, ultralight 'nanocardboard'

When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the difference between success and failure

Now, a team of Penn Engineers has demonstrated a new material they call "nanocardboard," an ultrathin equivalent of corrugated paper cardboard. A square...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

“3rd Conference on Laser Polishing – LaP 2018” Attracts International Experts and Users

09.11.2018 | Event News

On the brain’s ability to find the right direction

06.11.2018 | Event News

European Space Talks: Weltraumschrott – eine Gefahr für die Gesellschaft?

23.10.2018 | Event News

 
Latest News

Purdue cancer identity technology makes it easier to find a tumor's 'address'

16.11.2018 | Health and Medicine

Good preparation is half the digestion

16.11.2018 | Life Sciences

Microscope measures muscle weakness

16.11.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>