Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Nano-sized silicon oxide electrode for the next generation lithium ion batteries

15.07.2014

This article published in the Science and Technology of Advanced Materials reports an approach with industrial potential to produce nano-sized composite silicon-based powders as negative electrodes for the next generation lithium ion batteries.

The lithium ion battery market has been growing steadily and has been seeking an approach to increase battery capacity while retaining its capacity for long recharging process.


Lithium-ion battery testing

Copyright : Argonne National Laboratory / Flickr

Structuring materials for electrode at the nanometre-length scale has been known to be an effective way to meet this demand; however, such nanomaterials would essentially need to be produced by high throughput processing in order to transfer these technologies to industry.

This article published in the Science and Technology of Advanced Materials reports an approach which potentially has an industrially compatible high throughputs to produce nano-sized composite silicon-based powders as a strong candidate for the negative electrode of the next generation high density lithium ion batteries.

The authors have successfully produced nanocomposite SiO powders by plasma spray physical vapor deposition [1] using low cost metallurgical grade powders at high throughputs. Using this method, they demonstrated an explicit improvement in the battery capacity cycle performance with these powders as electrode.

The uniqueness of this processing method is that nanosized SiO composites are produced instantaneously through the evaporation and subsequent co-condensation of the powder feedstock. The approach is called plasma spray physical vapor deposition (PS-PVD). 

The composites are 20 nm particles, which are composed of a crystalline Si core and SiOx shell. Furthermore, the addition of methane (CH4) promotes the reduction of SiO and results in the decreased SiO-shell thickness.  The core-shell structure is formed in a single-step continuous processing.

As a result, the irreversible capacity was effectively decreased, and half-cell batteries made of PS-PVD powders have exhibited improved initial efficiency and maintenance of capacity as high as 1000 mAhg−1 after 100 cycles at the same time.


Reference:
Keiichiro Homma, Makoto Kambara, Toyonobu Yoshida: Sci. Technol. Adv. Mater. 15 (2014) 025006. http://dx.doi.org/10.1088/1468-6996/15/2/025006

[1] See, for instance, figures 1 and 3., J. Appl. Phys. 115, 143302 (2014); doi: 10.1063/1.4870600


For more information, contact
Dr. Makoto Kambara
Dept. Materials Engineering
The University of Tokyo
Email: mkambara@plasma.t.u-tokyo.ac.jp

Associated links

Mikiko Tanifuji | Research SEA News
Further information:
http://www.nims.go.jp/eng/
http://www.researchsea.com

Further reports about: Nano-sized Science Technology batteries battery capacity continuous electrode evaporation materials method powders processing

More articles from Materials Sciences:

nachricht Improving organic transistors that drive flexible and conformable electronics
06.05.2015 | University of Massachusetts at Amherst

nachricht Blending is the Trick: Tailored Pores in Block Copolymer Membranes
06.05.2015 | Helmholtz-Zentrum Geesthacht - Zentrum für Material- und Küstenforschung

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Spray drying the precision particle under the virtual magnifying glass

Spray drying is a common manufacturing process, used in the production of ceramic granulate for technical components or dental prostheses as well as dissolvable medicinal substances, food additives and in the processing of milk into powder. Using computer simulation methodology developed by scientists at the Fraunhofer Institute for Mechanics of Materials IWM, a more comprehensible understanding can now be gained of the behavior of particles in solvent during the spray drying process. This allows powder and granulate manufacturers to specifically adjust the properties of their products while reducing waste.

Previously, it was unusual for granule and powder producers to use granulation simulations to improve their products. For new product development or process...

Im Focus: The random raman laser: A new light source for the microcosmos

Texas A&M University researchers demonstrate how a narrow-band strobe light source for speckle-free imaging has the potential to reveal microscopic forms of life

In modern microscope imaging techniques, lasers are used as light sources because they can deliver fast pulsed and extremely high-intensity radiation to a...

Im Focus: Pulsar with widest orbit ever detected

Discovered by high school research team

A team of highly determined high school students discovered a never-before-seen pulsar by painstakingly analyzing data from the National Science Foundation's...

Im Focus: Erosion, landslides and monsoon across the Himalaya

Scientists from Nepal, Switzerland and Germany was now able to show how erosion processes caused by the monsoon are mirrored in the sediment load of a river crossing the Himalaya.

In these days, it was again tragically demonstrated that the Himalayas are one of the most active geodynamic regions of the world. Landslides belong to the...

Im Focus: Through the galaxy by taxi - The Dream Chaser Space Utility Vehicle

A world-class prime systems integrator and electronic systems provider known for its rapid, innovative, and agile technology solutions, Sierra Nevada Corporation (SNC) is currently developing a new space transportation system called the Dream Chaser.

The ultimate aim is to construct a multi-mission-capable space utility vehicle, while accelerating the overall development process for this critical capability...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Green Summit 2015: the summit of the essential

05.05.2015 | Event News

HHL Energy Conference on May 11/12, 2015: Students Discuss about Decentralized Energy

23.04.2015 | Event News

“Developing our cities, preserving our planet”: Nobel Laureates gather for the first time in Asia

23.04.2015 | Event News

 
Latest News

How noise changes the way the brain gets information

06.05.2015 | Life Sciences

A model approach for sustainable phosphorus recovery from wastewater

06.05.2015 | Ecology, The Environment and Conservation

No chance for house dust mites

06.05.2015 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>