Abstract
Supercritical drying of V2O5 gels yields amorphous aerogels (ARG) that serve as reversible, high capacity hosts for lithium ion intercalation. We have found that ARG material consists of a highly interconnected solid network that has a surface area up to 450 m2/g and a specific pore volume of 2.3 cm3/g. The material hosts at least 4 Li+ per mole of V2O5 (ARG) as determined by both galvanostatic intermittent titration (GITT) and chemical lithiation (CL) techniques. The equilibrium voltage-composition curve is identical for both GITT and CL techniques as well. V2O5 (ARG) has a specific energy in excess of 1600 Wh/kg, the highest ever reported for any vanadium oxide host.
Original language | English (US) |
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Pages (from-to) | 2099-2104 |
Number of pages | 6 |
Journal | Journal of the Electrochemical Society |
Volume | 143 |
Issue number | 7 |
DOIs | |
State | Published - Jul 1996 |