24 Jan 2013:
Solid Electrolyte Could Lead
To Larger, Safer Lithium Ion Batteries
U.S. researchers have developed a high-performance, solid electrolyte for use in energy-dense lithium ion batteries that they say is safer than existing liquid electrolytes and could lead to batteries that are five to 10 times more powerful than existing batteries
. While lithium-ion batteries typically utilize liquid electrolytes to conduct the lithium ions between the positively charged cathode and the negatively charged anode, the liquid materials pose flammability risks — especially as engineers attempt to make more powerful lightweight batteries. Utilizing a chemical process known as nanostructuring — which involves altering the structure of the crystals that make up materials — scientists at the Oak Ridge National Laboratory (ORNL) say they were able to create a nanoporous solid electrolyte that conducts ions 1,000 times faster than in its natural bulk form, enabling more energy-dense batteries. According to the researchers, this innovation could allow engineers to develop pure lithium anodes, which could yield batteries that are far more powerful than those using carbon-based anodes. “A solid electrolyte enables the lithium metal to cycle well, with highly enhanced safety,” said Chengdu Liang, a ORNL researcher and lead author of the study published in the Journal of the American Chemical Society
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An aerial view of why Europe’s per capita carbon emissions are less than 50 percent of those in the U.S. View the photos.
An indigenous tribe’s deadly fight to save its ancestral land in the Amazon rainforest from logging. Learn more.
video series looks at the staggering amount of food wasted in the U.S. – a problem with major human and environmental costs. Watch the video.
Residents of the Chocó Rainforest in Ecuador are choosing to plant cacao over logging in an effort to slow deforestation.
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Tribal people and ranchers join together to stop a project that would haul coal across their Montana land. Watch the video.