Highly Conductive Hierarchical TiO₂ Micro‐Sheet Enables Thick Electrodes in Sodium Storage

TiO2-based materials are considered to be the promising anodes of sodium-ion batteries (NIBs) because their high safety and good stability. However, low specific capacity operating voltage plateau impose a severe challenge for energy density batteries. Herein, interconnected micro-sheets consisting carbon nanotubes sulfur doped TiO2 (CNT/S-TiO2) synthesized via an ultrasonic process subsequent calcination, enabling fabrication high-performance material. The utilization SWCNT overcomes structure instabilities during electrode preparation thick electrodes. incorporation dopants in CNT/S-TiO2 composite not only enhances conductivity but also improves ion transport dynamics, resulting rapid charge delivery at level. Consequently, demonstrates excellent rate performance (from 0.3 15 C, with 72.4% retention) long cycling stability (10000 cycles load 1.96 mg cm−2). More importantly, S-TiO2 content (90%) (21.2 cm−2) achieves areal retention 3.4 mA h cm−2 after 100 cycles, which surpasses actual application requirements.