High Capacity Cathode and Carbon Nanotube-Supported Anode for Enhanced Energy Density Batteries
Technical Report,31 Jul 2014,31 Oct 2017
Rochester Institute of Technology Rochester United States
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The work evaluated high capacity cathodes along with high capacity anode materials such as silicon and germanium to reach lithium ion cell energy density of 400 Whkg. In addition, an approach of managing the amount of reversible lithium in a cell to prevent the anode potential from increasing to greater than the dissolution potential during near zero volt storage is introduced. Pouch cell demonstrations for mesocarbon microbead anode and lithium cobalt oxide and lithium rich cathodes show stability for days at near zero volts beginning of life with no measured difference in capacity, rate capability, or cycling. Cathode coating technologies of aluminum phosphate on lithium cobalt oxide improves the discharge stability which can increase energy density. The benefits of carbon nanotube current collectors for anode deposition are evaluated and improved with alumina coatings.
- Electrochemical Energy Storage