Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Pressure Cooking to Improve Electric Car Batteries

19.11.2013
By creating nanoparticles with controlled shape, engineers believe smaller, more powerful and energy efficient batteries can be built

Batteries that power electric cars have problems. They take a long time to charge. The charge doesn’t hold long enough to drive long distances. They don’t allow drivers to quickly accelerate. They are big and bulky.


Lithium iron phosphate battery created in Kisailus lab.

Researchers at the University of California, Riverside’s Bourns College of Engineering have redesigned the component materials of the battery in an environmentally friendly way to solve some of these problems. By creating nanoparticles with a controlled shape, they believe smaller, more powerful and energy efficient batteries can be built. By modifying the size and shape of battery components, they aim to reduce charge times as well.

“This is a critical, fundamental step in improving the efficiency of these batteries,” said David Kisailus, an associate professor of chemical and environmental engineering and lead researcher on the project.

In addition to electric cars, the redesigned batteries could be used for municipal energy storage, including energy generated by the sun and wind.

The initial findings are outlined in a just published paper called “Solvothermal Synthesis, Development and Performance of LiFePO4 Nanostructures” in the journal Crystal Growth & Design.

Kisailus, who is also the Winston Chung Endowed Professor in Energy Innovation, and Jianxin Zhu, a Ph.D. student working with Kisailus, were the lead authors of the paper. Other authors were: Joseph Fiore, Dongsheng Li, Nichola Kinsinger and Qianqian Wang, all of whom formerly worked with Kisailus; Elaine DiMasi, of Brookhaven National Laboratory; and Juchen Guo, an assistant professor of chemical and environmental engineering at UC Riverside.

The researchers in Kisailus’ Biomimetics and Nanostructured Materials Lab set out to improve the efficiency of Lithium-ion batteries by targeting one of the material components of the battery, the cathode.

Lithium iron phosphate (LiFePO4), one type of cathode, has been used in electric vehicles because of its low cost, low toxicity and thermal and chemical stability. However, its commercial potential is limited because it has poor electronic conductivity and lithium ions are not very mobile within it.

Several synthetic methods have been utilized to overcome these deficiencies by controlling particle growth. Here, Kisailus and his team used a solvothermal synthetic method, essentially placing reactants into a container and heating them up under pressure, like a pressure cooker.

Kisailus, Zhu and their team used a mixture of solvents to control the size, shape and crystallinity of the particles and then carefully monitored how the lithium iron phosphate was formed. By doing this, they were able to determine the relationship between the nanostructures they formed and their performance in batteries.

By controlling the size of nanocrystals, which were typically 5,000 times smaller than the thickness of a human hair, within shape-controlled particles of LiFePO4, Kisailus’ team has shown that batteries with more power on demand may be generated.

These size and shape modulated particles offer a higher fraction of insertion points and reduced pathlengths for Li-ion transport, thus improving battery rates. Kisailus and his team are currently refining this process to not only further improve performance and reduce cost, but also implement scalability.

The research was sponsored by the Winston Chung Global Energy Center, which is named after Winston Chung, a Chinese battery inventor who has provided more than $16 million in support to the campus in recent years for clean energy research.

Media Contact

Sean Nealon
Tel: (951) 827-1287
E-mail: sean.nealon@ucr.edu
Twitter: seannealon
Additional Contacts
David Kisailus
E-mail: david@engr.ucr.edu

Sean Nealon | EurekAlert!
Further information:
http://www.ucr.edu

More articles from Power and Electrical Engineering:

nachricht Multicrystalline Silicon Solar Cell with 21.9 % Efficiency: Fraunhofer ISE Again Holds World Record
20.02.2017 | Fraunhofer-Institut für Solare Energiesysteme ISE

nachricht Six-legged robots faster than nature-inspired gait
17.02.2017 | Ecole Polytechnique Fédérale de Lausanne

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: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Switched-on DNA

20.02.2017 | Materials Sciences

Second cause of hidden hearing loss identified

20.02.2017 | Health and Medicine

Prospect for more effective treatment of nerve pain

20.02.2017 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>