Flexible TiO₂/SiO₂/C Film Anodes for Lithium‐Ion Batteries

Abstract

Flexible TiO /SiO /C films are prepared by using an electrospinning approach and used as self-supporting electrodes for lithium-ion batteries (LIBs), which exhibit excellent high-rate capability with a capacity of 115.5 mAh g at 8 A g (9.8 C rate) and good storage performance. The LIBs also show high long-term cycling stability of 700 cycles at 200 mA g with a capacity of 380.1 mAh g and a high capacity retention of 88.3 %. Thus, the TiO /SiO /C films have the potential to serve as electrodes for flexible LIBs, owing to their flexibility and excellent electrochemical performance.

Interfacial Reactions between Lithium and Grain Boundaries from Anatase TiO2–TUD-1 Electrodes in Lithium-Ion Batteries with Enhanced Capacity Retention

“…Moreover, a slight increase in the specific capacity was also observed in this electrode, which has also been observed in other SiO 2 -containing anodes. 8,14,59 The corresponding Coulombic efficiencies depicted in Figure 9b showed efficiencies higher than 99% after the initial cycles and these efficiencies remained stable during cycling.…”

“…4 Further studies using electrospinning techniques allowed the synthesis of flexible TiO 2 −SiO 2 −C films with a stable capacity of 380.1 mA h g −1 and capacity retention of 88% over 700 cycles. 14 In another recent study, the preparation of titanosilicate-derived nanosheets consisting of highly dispersed anatase TiO 2 nanoparticles in a silica matrix gave rise to capacities of 998 mA h g −1 after 100 cycles at 100 mA g −1 . 8 In the later study, the highly distributed TiO 2 and SiO 2 components in this material proved effective in achieving the optimized distribution of grain boundaries and improving the diffusion of Li + ions further, resulting in the capacities reported above.…”

“…The synergistic effect in SiO 2 −TiO 2 composites will depend not only on their composition but also on the distribution of each metal oxide, that is, their interaction must be optimized to fully exploit the benefits of this solid mixture. 3,4,12,14 Zhang et al reported hydrothermally synthesized TiO 2 − SiO 2 composites with high grain-boundary densities as anodes with capacities of 233 mA h g −1 at 150 mA g −1 . 4 Further studies using electrospinning techniques allowed the synthesis of flexible TiO 2 −SiO 2 −C films with a stable capacity of 380.1 mA h g −1 and capacity retention of 88% over 700 cycles.…”

Binder-free SnO2–TiO2 composite anode with high durability for lithium-ion batteries

“…8,9,[16][17][18][19][20][21] Although SnO 2 has a lower theoretical capacity than the better-known SiO 2 (780 mA h g À1 , compared to 980 mA h g À1 ), its volume expansion ratio is also lower ($150%, compared to $260%). [22][23][24][25][26][27][28][29][30][31] However, since the volume change of SnO 2 is still large, it is necessary to suppress the volume change-induced degradation by combining with zero-strain materials such as TiO 2 . Jean et al fabricated high performance anodes for LIBs based on TiO 2 @SnO 2 @TiO 2 triple-shell nanotubes prepared by a hydrothermal growth method.…”

X-ray Spectral Investigation of SiO2/TiO2/C Nanocomposites

“…Carbon-oxide nanosystems attract attention of investigators due to the possible practical application as new catalysts and adsorbents, anode for lithium-ion batteries, high-performance supercapacitors [1][2][3] owing to their unique properties. Nanocomposites functionality and properties exceed those of individual oxides.…”