The use of lithium metal as the anode for Lithium Metal Batteries (LMB) requires having solid or quasi-solid electrolytes able to block dendrites formation during cell cycling. Here we reported on a hybrid electrolyte membrane based on nanostructured yttria-stabilized-zirconia, sintered by means of High Pressure-Field Assisted Sintering Technique (HP-FAST) in order to retain proper nano-porosity, and activated with a standard LiPF6-EC-DMC solution. By a thorough physico-chemical and functional characterization, we demonstrated that the liquid is effectively nano-confined in the ceramic membrane, and the resulting quasi-solid electrolyte is non-flammable. A remarkable conductivity value of 0.91 mS cm−1 was observed at room temperature, with activation energy of 0.2 eV, and cation transference number, t+ = 0.55, substantially higher than that of the pure liquid electrolyte. The hybrid electrolyte showed electrochemical stability up to 5.5 V vs. Li+/Li, and excellent resistance to dendrite formation for more than 350 cycles in a Li/electrolyte/Li symmetrical cell. A full cell Li/electrolyte/LiMn2O4 showed more than 90 mAh g−1 at 2C for more than 120 cycles. These very promising results indicated that nano-porous ceramic hybrid electrolytes may be conveniently used in LMB.

Pianta, N., Baldini, A., Ferrara, C., Anselmi-Tamburini, U., Milanese, C., Mustarelli, P., et al. (2019). A safe quasi-solid electrolyte based on a nanoporous ceramic membrane for high-energy, lithium metal batteries. ELECTROCHIMICA ACTA, 320 [10.1016/j.electacta.2019.07.050].

A safe quasi-solid electrolyte based on a nanoporous ceramic membrane for high-energy, lithium metal batteries

Pianta N.;Baldini A.;Ferrara C.;Mustarelli P.;
2019

Abstract

The use of lithium metal as the anode for Lithium Metal Batteries (LMB) requires having solid or quasi-solid electrolytes able to block dendrites formation during cell cycling. Here we reported on a hybrid electrolyte membrane based on nanostructured yttria-stabilized-zirconia, sintered by means of High Pressure-Field Assisted Sintering Technique (HP-FAST) in order to retain proper nano-porosity, and activated with a standard LiPF6-EC-DMC solution. By a thorough physico-chemical and functional characterization, we demonstrated that the liquid is effectively nano-confined in the ceramic membrane, and the resulting quasi-solid electrolyte is non-flammable. A remarkable conductivity value of 0.91 mS cm−1 was observed at room temperature, with activation energy of 0.2 eV, and cation transference number, t+ = 0.55, substantially higher than that of the pure liquid electrolyte. The hybrid electrolyte showed electrochemical stability up to 5.5 V vs. Li+/Li, and excellent resistance to dendrite formation for more than 350 cycles in a Li/electrolyte/Li symmetrical cell. A full cell Li/electrolyte/LiMn2O4 showed more than 90 mAh g−1 at 2C for more than 120 cycles. These very promising results indicated that nano-porous ceramic hybrid electrolytes may be conveniently used in LMB.
Articolo in rivista - Articolo scientifico
Hybrid electrolytes; Li batteries; Li dendrite; Nanoporous ceramic membrane; Safety;
English
Pianta, N., Baldini, A., Ferrara, C., Anselmi-Tamburini, U., Milanese, C., Mustarelli, P., et al. (2019). A safe quasi-solid electrolyte based on a nanoporous ceramic membrane for high-energy, lithium metal batteries. ELECTROCHIMICA ACTA, 320 [10.1016/j.electacta.2019.07.050].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/250314
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