Electronics Assembly Knowledge, Vision & Wisdom
Programs | Directory | Subscribe
Breakthrough for Lithium Ion Batteries
Breakthrough for Lithium Ion Batteries
Lithium-ion batteries provide reliable energy. Electric vehicles using lithium-ion batteries do not appear to be competitive with other technologies.
Technology Briefing

,{url:'http://www.circuitinsight.com/videos/technology_briefing_lithium_ion_batteries.mp4'}], clip:{autoBuffering:true, autoPlay:true, scaling:'scale' } }).ipad();
Technology Briefing is brought to you by association with Audio-Tech, publishers of critically acclaimed programs including: Trends Magazine.

Subscribe to their monthly reports and learn about big ideas, new products, new management techniques, breakthrough concepts, and trailblazing technologies.
Transcript

Lithium-ion batteries provide laptops, smart phones, and tablet computers with reliable energy. However, electric vehicles using conventional lithium-ion batteries do not appear to be competitive with other technologies. This is largely due to currently utilized electrode materials such as graphite only being able to stably adsorb a limited number of lithium ions, restricting the capacity of these batteries.

Semiconductor materials like silicon are therefore receiving attention as alternative electrodes for lithium batteries. Bulk silicon is able to absorb enormous quantities of lithium. However, the migration of the lithium ions can swell the volume by a factor of three, which leads to major mechanical stresses destroying the crystal structure of the silicon.

Now a team from the HZB Institute for Soft Matter and Functional Materials has discovered two layers on the silicon electrode. The first roughly 20-nm layer formed with extremely high lithium content: specifically, 25 lithium atoms lodged among ten silicon atoms. A second adjacent layer contained only one lithium atom for ten silicon atoms. Both layers together are less than 100 nm thick after the second charging cycle. After discharge, about one lithium ion per silicon node in the electrode remained in the silicon boundary layer exposed to the electrolytes.

The team calculates from this observation that the theoretical maximum capacity of silicon-lithium batteries using these 100-nm layers to form electrodes, lies at about 2300 mAh/g (milliamp-hours per gram). This is more than six times the theoretical maximum attainable capacity for today's lithium-ion batteries constructed with graphite (372 mAh/g).

If such thin-layer silicon electrodes can be commercialized, lithium-ion batteries could see a 600 percent leap in energy-density, making them much more practical for real world applications like automobiles and drones.

Submit A Comment

Comments are reviewed prior to posting. Please avoid discussion of pricing or recommendations for specific products. You must include your full name to have your comments posted. We will not post your email address.

Your Name


Company


E-mail


Country


Comments


Authentication

Please type the number displayed into the box. If you attempt to submit information and receive an error, you may need to refresh the page and insert the information again.



         
Related Programs
bullet Rebooting the IT Revolution
bullet Robots At War
bullet Smart Buildings Will Transform Our Lives
bullet The Flying Taxi Experience May Be Here Sooner Than Expected
bullet Harnessing AI-Driven Growth
bullet Managing the Internet of (Hackable) Things
bullet How Crowdfunding Influences Innovation
bullet The Brave New World of Human Enhancement
bullet Advances In Protective Packaging
bullet How Commercial Drones Will Optimize the Supply Chain
More Related Programs