Electrodeposition of Polymer Electrolyte Into Porous LiNi0.5Mn1.5O4 for High Performance All-Solid-State Microbatteries

Girish D Salian; Chrystelle Lebouin; Alina Galeyeva; Andrey P Kurbatov; Thierry Djenizian

doi:10.3389/fchem.2018.00675

Electrodeposition of Polymer Electrolyte Into Porous LiNi_0.5Mn_1.5O₄ for High Performance All-Solid-State Microbatteries

Front Chem. 2019 Jan 23:6:675. doi: 10.3389/fchem.2018.00675. eCollection 2018.

Authors

Girish D Salian¹, Chrystelle Lebouin¹, Alina Galeyeva², Andrey P Kurbatov², Thierry Djenizian³

Affiliations

¹ Electrochemistry of Materials Research Group, Aix Marseille Univ, CNRS, MADIREL, Marseille, France.
² Department of Chemistry and Chemical Technology, Al Farabi Kazakh National University, Alma Ata, Kazakhstan.
³ Mines Saint-Etienne, Department of Flexible Electronics, Center of Microelectronics in Provence, Gardanne, France.

Abstract

We report the electrodeposition of polymer electrolyte (PMMA-PEG) in porous lithium nickel manganese oxide (LiNi_0.5Mn_1.5O₄) cathode layer by cyclic voltammetry. The cathode-electrolyte interface of the polymer-coated LNMO electrode has been characterized by scanning electron microscopy and electrochemical techniques. Electrochemical measurements consisting of galvanostatic cycling tests and electrochemical impedance spectroscopy revealed a significant improvement of the capacity values and the increase of the operating voltage. These effects are attributed to the total filling of pores by the electrodeposited polymer that contributes to improve the reversible insertion of Li⁺. A complete all-solid-state microbattery consisting of electropolymerized LNMO as the cathode, a thin polymer layer as the electrolyte, and TiO₂ nanotubes as the anode has been successfully fabricated and tested.

Keywords: Li-ion microbatteries; electropolymerization; lithium nickel manganese oxide; polymer electrolyte; porous materials.