PT Journal AU Hofmann, A Schulz, M Indris, S Heinzmann, R Hanemann, T TI Mixtures of ionic liquid and sulfolane as electrolytes for Li-ion batteries SO Electrochimica acta PY 2014 BP 704 EP 711 VL 147 DI 10.1016/j.electacta.2014.09.111 LA english ER