Elena Krieger

Elena studied materials for energy conversion and storage with a focus on ultracapacitors.  Ultracapacitors store energy electrochemically like batteries, but unlike batteries they store energy primarily in the electrical double layer formed between the electrolyte and electrodes of the cell. This feature allows for rapid charge and discharge and high cyclability, resulting in long ultracapacitor lifespans in high power applications such as regenerative breaking in electric vehicles.  Elena’s research looked specifically at increasing energy density in the cells by optimizing the feature size on high surface area carbon electrodes in conjunction with novel ionic liquid electrolytes.