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.


Lithium-ion battery testing

Copyright : Argonne National Laboratory / Flickr

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.

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 Seeing is bead-lieving
29.07.2014 | Rice University

nachricht ORNL study reveals new characteristics of complex oxide surfaces
25.07.2014 | DOE/Oak Ridge National Laboratory

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Anzeige

Anzeige

Event News

Counting down to FEBS-EMBO 2014 in Paris, France

29.07.2014 | Event News

9th European Wood-Based Panel Symposium 2014 – meeting point for the wood-based material branch

24.07.2014 | Event News

“Lens on Life” - Artists and Scientists Explore Cell Divison

08.07.2014 | Event News

 
Latest News

Scientists discover genetic switch that can prevent peripheral vascular disease in mice

29.07.2014 | Life Sciences

From Finding Nemo to minerals – what riches lie in the deep sea?

29.07.2014 | Earth Sciences

Physicists unlock nature of high-temperature superconductivity

29.07.2014 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>