Scalable Synthesis of Bulk TiO₂ Hybrids Toward Efficient Li‐Storage Performance in “Rocking‐Chair” Type Full‐Cell Assembly With High Voltage LiNi_0.5Mn_1.5O₄ Cathode

Abstract Exploring 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 LiNi_0.5Mn_1.5O₄ (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.