Li/O2 batteries are a breakthrough in battery technology for powering long-range electric vehicles. The viability of high efficiency, rechargeable Li/O2 battery is demonstrated by the use of catalyst-free mesomacroporous carbon cathode and N-butyl-N-methyl pyrrolidinium bis(trifluoromethanesulfonyl)imide ionic liquid-based electrolyte. The carbon electrode, obtained by a simple, low-cost template method, features a high specific capacity of 2500 mAh/g at 2.6 V vs. Liþ/Li and, more importantly, a recharge potential lower than 3.8 V vs Li+/Li that prevents secondary reactions in the ionic liquid detrimental for battery rechargeability and makes it possible to reach a recharge efficiency of 90%.
Titolo: | Catalyst-free porous carbon cathode and ionic liquid for high efficiency, rechargeable Li/O2 battery |
Autore/i: | SOAVI, FRANCESCA; MONACO, SIMONE; MASTRAGOSTINO, MARINA |
Autore/i Unibo: | |
Anno: | 2013 |
Rivista: | |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/j.jpowsour.2012.09.095 |
Abstract: | Li/O2 batteries are a breakthrough in battery technology for powering long-range electric vehicles. The viability of high efficiency, rechargeable Li/O2 battery is demonstrated by the use of catalyst-free mesomacroporous carbon cathode and N-butyl-N-methyl pyrrolidinium bis(trifluoromethanesulfonyl)imide ionic liquid-based electrolyte. The carbon electrode, obtained by a simple, low-cost template method, features a high specific capacity of 2500 mAh/g at 2.6 V vs. Liþ/Li and, more importantly, a recharge potential lower than 3.8 V vs Li+/Li that prevents secondary reactions in the ionic liquid detrimental for battery rechargeability and makes it possible to reach a recharge efficiency of 90%. |
Data prodotto definitivo in UGOV: | 2013-06-18 16:10:30 |
Appare nelle tipologie: | 1.01 Articolo in rivista |