comment on this article

Cathode material boosts Li-S battery performance

While lithium-sulphur batteries provide a potential replacement for Li-ion technology, issues with the chemistry mean the battery’s capacity declines over multiple charging cycles as a result of the ‘shuttle effect’. Looking to overcome this problem, researchers are developing cathode materials that can either confine or encapsulate polysulphides.

A team from Helmholtz-Zentrum Berlin, headed by Professor Yan Lu, has fabricated a cathode material that uses Ti4O7 molecules arranged on a porous spherical surface to confine sulphur. According to the team, these porous nanoparticles bind polysulphides more strongly than TiO2 based nanoparticles. “We have developed a special fabrication process to generate this complex, three-dimensionally interconnected pore structure”, said Prof Lu.

Compared with other cathode materials made of titanium oxides, the Ti4O7 nanosphere matrix possesses an extremely large surface area and a specific capacity of 1219mAh/g at 0.1C, where 1C=1675mA/g. The specific capacity is said to decline by 0.094% per charge/discharge cycle. Meanwhile, the specific capacity of cathode materials made of TiO2 nanoparticles is 683mAh/g.

Graham Pitcher

Comment on this article

This material is protected by MA Business copyright See Terms and Conditions. One-off usage is permitted but bulk copying is not. For multiple copies contact the sales team.

What you think about this article:

Add your comments


Your comments/feedback may be edited prior to publishing. Not all entries will be published.
Please view our Terms and Conditions before leaving a comment.

Related Articles

Eel inspired battery

The electric eel has inspired researchers at the University of Fribourg, the ...

ST buys Atollic

STMicroelectronics is acquiring the software-development tools specialist ...

NI Trend Watch 2014

This report from National Instruments summarises the latest trends in the ...

Power line inductors

Murata has introduced the LQW32FT series of inductors for use in automotive ...

Get to market faster

A quick look at using Vicor's PFM and AIM in VIA packaging for your AC to Point ...

Mobile slowdown

With just under a week to go before Apple launches its new iPhone the press has ...

The project begins

Recently, Stephen Doran took up his position as CEO of the Compound ...

Peak or bleak?

Ten years ago, the EIGT Report presented the electronics industry with some ...

Terence Watson

Ask Terence Watson about power electronics and you're left in no doubt of his ...