Substantially smaller and longer-lasting batteries for everything from portable electronic devices to electric cars could be come a reality thanks to an innovative technology developed by University of Waterloo researchers.
Zhongwei Chen, a chemical engineering professor at Waterloo, and a team of graduate students have created a low-cost battery using silicon that boosts the performance and life of lithium-ion batteries. Their findings are published in the latest issue of Nature Communications.
Waterloo’s silicon battery technology promises a 40 to 60 per cent increase in energy density, which is important for consumers with smartphones, smart homes and smart wearables.
The environmentally safe technology could also make dramatic improvements for hybrid and electric vehicles. The findings could mean an electric car may be driven up to 500 kilometres between charges and the smaller, lighter batteries may significantly reduce the overall weight of vehicles.
Current lithium-ion batteries normally use graphite anodes. The Waterloo engineers found that silicon anode materials have a much higher capacity for lithium and are capable of producing batteries with almost 10 times more energy.
“Graphite has long been used to build the negative electrodes in lithium-ion batteries,” said Professor Chen, the Canada Research Chair in Advanced Materials for Clean Energy and a member of the Waterloo Institute for Nanotechnology and the Waterloo Institute for Sustainable Energy. “But as batteries improve, graphite is slowly becoming a performance bottleneck because of the limited amount of energy that it can store.”
The most critical challenge the Waterloo researchers faced when they began producing batteries using silicon was the loss of energy that occurs when silicon contracts and then expands by as much as 300 per cent with each charge cycle. The resulting increase and decrease in silicon volume forms cracks that reduce battery performance, create short circuits, and eventually cause the battery to stop operating.
To overcome this problem, Professor Chen’s team along with the General Motors Global Research and Development Centre developed a flash heat treatment for fabricated silicon-based lithium-ion electrodes that minimizes volume expansion while boosting the performance and cycle capability of lithium-ion batteries.
“The economical flash heat treatment creates uniquely structured silicon anode materials that deliver extended cycle life to more than 2000 cycles with increased energy capacity of the battery,” said Professor Chen.
The Latest on: Silicon anode
via Google News
The Latest on: Silicon anode
- HPQ-Silicon Resources Inc URAGFon October 8, 2020 at 9:45 pm
Breizh1 wrote: Apollon has the process to clean the metallurgical grade silicon of impurities and output a 4N quality Si metal initially to manufacture PV panel . Now the question is that the Si ...
- Black phosphorus composites with engineered interfaces for high-rate high-capacity lithium storageon October 8, 2020 at 1:59 pm
See allHide authors and affiliations A focus of battery research has been the development of a range of lithium, sodium, and potassium cathodes, but improving anode materials is also an important goal ...
- Taking Lithium-Ion Batteries to the Next Levelon October 8, 2020 at 5:05 am
Although the first lithium-ion (Li-ion) battery was conceived more than 50 years ago, the technology continues to be refined and improved today.
- Nouveau Monde’s Research & Development Consortium Advances its Carbon-Neutral Battery Anode Programon October 7, 2020 at 3:44 pm
Nouveau Monde’s R&D consortium, led by Professor Lionel Roué of the Institut national de la recherche scientifique, advances its proprietary lithium-ion battery anode program with an important ...
- Future batteries, coming soon: Charge in seconds, last months and power over the airon October 6, 2020 at 5:00 pm
Timo Ikonen, University of Eastern Finland A step closer to silicon anode lithium-ion batteries Looking to overcome the problem of unstable silicon in lithium-ion batteries, researchers at ...
- "World's fastest electrodes" triple the density of lithium batterieson October 6, 2020 at 4:14 pm
The company has developed processes to make the nanotubes more compatible with a range of active materials including silicon, nickel-manganese-cobalt and sulfur chemistries, and some other more ...
- Silicon Anodes May Improve Lithium Ion Batterieson October 5, 2020 at 5:00 pm
One area of particular interest is the replacement of the graphite carbon negative electrode (anode) with silicon. When a lithium ion battery is charged, lithium ions move between the layers of carbon ...
- HPQ-Silicon Resources Inc. URAGFon October 3, 2020 at 1:57 am
Literally, not even a week after Tesla's Battery Day announcement of silicon anodes as the future and the biggest material change that gives the biggest energy density (range increase), A MAJOR ...
- Tesla Battery Day—Taking EVs to the Next Levelon October 2, 2020 at 11:10 am
Done.” The Anode: Using Raw Silicon A Li-ion battery is an intercalation system, in which both cathode and anode present structures that allow reversible insertion and extraction of Li+ lithium.
- Motor Mouth: The top battery tech you can expect in tomorrow's EVson October 2, 2020 at 3:07 am
The limiting factor in current batteries seems to be the anode, which in current batteries is made of graphite. Adding silicon, say researchers from numerous laboratories, renders a battery both ...
via Bing News