Abstract
? 2022 Elsevier B.V.A novel three dimensional (3D) N-doped Li4Ti5O12 (LTO) nanoribbon (N-LTONR) network electrode is synthesized by hydrothermal process and subsequent gas-solid reaction. The presence of self-doped Ti3+ and oxygen vacancies in LTO lattice further enhances the intrinsic conductivity. The thin nanoribbons (70 nm in width and 20 nm in thickness) are twisted and intertwined to form a 3D conductive network, and can be directly served as flexible electrode for Li ion batteries (LIB) without using any binder and conductive additives. The optimized N-LTONR electrode exhibits excellent high-rate capability, low-temperature performance and cycle stability. It delivers a areal capacity of 0.26 mAh cm?2 at a high current density of 10 mA cm?2, and has a capacity retention rate of 85.2% after 1000 cycles at 3 mA cm?2. It also displays excellent low-temperature adaptability and retains 78.3% room temperature-capacity even under ? 30 °C, exhibits a low capacity loss (2%) after 100 cycles at 1 mA cm?2 under ? 20 °C. In addition, the 3D nanoribbon network electrode possesses good flexibility and has promising potential to be used for flexible and bendable LIBs.
NSTL
Elsevier