Fabrication and All Solid-State Battery Performance of TiS₂/Li₁₀GeP₂S₁₂ Composite Electrodes

Abstract

TiS₂/Li₁₀GeP₂S₁₂ composite electrodes were fabricated using a mill pot rotator, and their electrochemical properties were investigated with all solid-state batteries of TiS₂/Li₁₀GeP₂S₁₂/In-Li. The batteries compressed under 19 MPa showed poor cycle stability and low rate capability due to deterioration of physical contact between the TiS₂ electrode and the Li₁₀GeP₂S₁₂ solid-electrolyte. The battery performance was much improved by applying a pressure of 230 MPa throughout the electrochemical cycling. The battery delivered the reversible capacity of over 160 mAh g⁻¹ with high retention under 1 C operation condition.