Scalable Synthesis of Bulk TiO2 Hybrids Toward Efficient Li‐Storage Performance in “Rocking‐Chair” Type Full‐Cell Assembly With High Voltage LiNi0.5Mn1.5O4 Cathode

Abstract

AbstractExploring anode materials with outstanding safety, high capacities, and superior rate performance for lithium‐ion batteries (LIBs) remains a constant objective. A simple and green synthesis method with an excellent electrochemical performance of a TiO2 bronze/anatase hybrid is herein reported as an anode at different temperature conditions (400 °C, 450 °C, and 500 °C) for LIBs. The Li‐ion insertion/extraction properties are studied in a half‐cell assembly (Li/TiO2) and subsequently in a “rocking‐chair” type full‐cell configuration with a high voltage LiNi0.5Mn1.5O4 (LNMO) cathode. In both half and full‐cell assemblies, all three TiO2 hybrids exhibit promising results with an initial discharge capacity of >165 mAh g−1 at a current rate of 0.05 A g−1 along with a capacity retention of >90% after 100 cycles. The initial coulombic efficiency of ≈78% is observed for the full‐cell, LNMO/TiO2‐400 °C, with a maximum energy density of 192.75 Wh kg−1 and good cyclability at room temperature conditions.