A technical paper on solid electrolytes composed of LLZO powders of Toshima Manufacturing Co., Ltd is published in the Journal of The Electrochemical Society. Paper title： Investigation of the Ionic Conduction Mechanism of Polyether/Li7La3Zr2O12 Composite Solid Electrolytes by Electrochemical Impedance Spectroscopy The abstract extracted from this paper is as follows. “Polyether-based polymer/cubic Li7La3Zr2O12 (LLZO) composite solid electrolytes were prepared by dispersing LLZO powder in a lithium (Li) conductive polyether-based solid polymer electrolyte. [SUS∣electrolyte∣SUS] (SUS: stainless steel) and [Li∣electrolyte∣ Li] symmetrical cells were fabricated, and the ionic conductivity, Li/electrolyte interfacial resistance, and Li-cation transport number of the electrolytes were evaluated by electrochemical impedance spectroscopy. The polyether-based polymer/LLZO composite solid electrolytes showed relatively high ionic conductivity of over 10-4 S cm-1 at 333.15 K, along with high electrochemical stability and low interfacial resistance to Li metal electrodes. Remarkable changes of Cole-Cole plots were observed with the variation of LLZO content, which was attributed to the formation of local percolation pathways between LLZO grains in the polymer matrix. Li-ion conduction was faster in the LLZO phase than in the polymer phase. The Li-cation transport number of the polymer/LLZO composite solid electrolytes was almost constant value regardless of LLZO content because of the rate-limiting ionic transport in the polymer phase with a low Li-cation transport number.” The LLZO powders utilized in this paper are marketed as our products.