Enhanced Lithium-Ion Transport in Polyphosphazene based Gel Polymer Electrolytes
作者： S. Jankowsky , Martin M. Hiller , O. Fromm , M. Winter , H.-D. Wiemhöfer
DOI: 10.1016/J.ELECTACTA.2014.12.123
关键词: Lithium vanadium phosphate battery 、 Inorganic chemistry 、 Phosphazene 、 Materials science 、 Polymer 、 Lithium-ion battery 、 Polyphosphazene 、 Lithium ion transport 、 Electrochemistry 、 Electrolyte
摘要: Abstract A detailed electrochemical study is presented of the lithium ion transport in polyphosphazene based gel polymer electrolytes. The poly[bis(2-(2-methoxyethoxy) ethoxy) phosphazene (MEEP) was chosen for polymeric network. In combination with liquid electrolytes (organic carbonates bis(oxalato) borate and lithium(hexafluoro) phosphate) electrolyte membranes very good ionic conductivities 2.3 mS cm−1 at 30 °C high transference numbers 0.31 90 °C were prepared. investigated exhibited interface stability metal electrodes during long term plating/stripping experiments up to 500 cycles. Discharge rate investigations on full cells consisting ∣ MEEP LiFePO4 delivered capacities 140 mAh g−1 a discharge 5C.
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