Geaney Research Group
Materials for Energy Storage
Recent Publication Highlights
Si NW growth on flexible carbon cloth allowed for higher areal capacity anodes compared to NWs grown on stainless steel. The high density Si NWs, coupled with contribution from the electrochemically active current collector, increased the areal capacity >2mAh/cm2.
Na-ion battery investigation of Si,SixGe1-x and Ge NWs. We examine the roles of amorphization & elemental compositions in determining Na alloying reversibility. It is shown that amorphization unlocks cycling ability, with Si0.5Ge0.5 NWs having the best capacity retention.
Li-ion battery anodes formed using copper silicide nanowires as high surface area hosts for Si NW growth. The complex branched nanowires and high density growth allowed for increased areal capacities, towards practical devices.
Review on low temperature operation of Li-ion batteries, with particular focus on anode related mechanistic issues. Includes recent material advances and an examination of future opportunities to develop better performing, low temperature batteries.