2013-01-04. A Boost for Lithium-Sulfur Batteries

posted Jan 5, 2013, 11:40 PM by Alan Gould
| Robert F. Service, Science 4 Vol. 339 no. 6115 pp. 20-21. Relevant to GSS Energy Use chapter 9. Excerpt: …new innovations unveiled at the meeting could see fivefold improvements in battery performance. …today's lithium-ion rechargeables work by shuttling electrical charges back and forth between two electrodes—a positively charged cathode and a negatively charged anode. …LiCoO2 cathodes can't hold on to very many lithium ions, which keeps the battery's overall electrical storage capacity low. …lithium-sulfur batteries [could have] about five times the capacity of current lithium-ion cells. …Yi Cui, a materials scientist at Stanford University in Palo Alto, California, … and his team encapsulated tiny nanoparticles of sulfur inside a shell of titanium dioxide (TiO2)… [and] packed their coated nanoparticles together to form a cathode. …the new batteries have a capacity …roughly six times that of the current devices on the market. … Cui said his team charged and discharged the battery more than 1000 times with negligible drop off in performance. …In previous work, Cui's team … [made] a high capacity anode, which can potentially give lithium-ion batteries another 10-fold power boost. Now, Cui says, his group is working to put the two nanoparticle electrodes together to see if they can produce the battery Christmas presents have been waiting for.   …. Read the full article: http://www.sciencemag.org/content/339/6115/20.2.full