Influence of 15-crown-5 additive to a liquid electrolyte on the performance of Li/CFx - Systems at temperatures up to-50 °C

The additive of 15-crown-5 for liquid electrolyte for primary Li/CFx cells is proposed. In their presence the cells with 1 M LiBF4 in GBL and 1 M LiPF6 in EC/DMC/EMC are workable at low temperatures. Their discharge capacities are 140 and 110 mAh g(-1) at -45 divided by -50 degrees C respectively. The 15-crown-5 additive probably is adsorbed on electrodes surfaces and form Li+ conducting layers. This mechanism approved by quantum-chemical modeling. (C) 2016 Elsevier B.V. All rights reserved.