Addition of a thin-film inorganic solid electrolyte (Lipon) as a protective film in lithtium batteries with a liquid electrolyte

摘要

Three rechargeable lithium cells have been fabricated using thin films of Li and sputter-deposited Li_xMn_2-yO_4 as the electrodes, and a liPF_6 organic liquid electrolytes. Cells were cycled up to 18 times between 4.5 and 2.5 V at 25deg.c both with and without the addition of the thin-film lithium phosphorus oxynitride solid electrolyte, known as Lipon Of the cells tested, the Lipon film was most effective in maximizing the capacity and cycling efficiency when deposited in direct contact with the cathode; however, a significant improvement over the Lipon-free cell was also observed with Lipon sandwiched between layers of the liquid electrolyte. In the latter case, the Llpon was deposited onto a microporous polypropylene separator membrane. Published by Elsevier Science S.A.