Free-standing Hierarchical Porous Assemblies of Commercial TiO2 Nanocrystals and Multi-walled Carbon Nanotubes as High-performance Anode Materials for Sodium Ion Batteries

摘要: Abstract Freestanding hierarchical porous assemblies of commercial TiO 2 nanocrystals and multi-wall carbon nanotubes (MWCNTs) as electrode materials for sodium ion batteries (SIBs) are prepared via modified vacuum filtration, free-drying annealing. Microstructure characterizations reveal that confined in hierarchically porous, highly electrically conductive mechanically robust MWCNTs networks with cross-linking thermally-treated bovine serum albumin. The architecture not only enables rapid charge transportation sufficient interaction between electrolyte, but also guarantees abundant interfacial sites Na + adsorption, which benefits substantial contribution from pseudocapacitive storage. When it is used directly an anode sodium-ion batteries, the delivers high specific capacity 100 mA h g −1 at a current density 3000 mA g , 150 mA h g after 500 cycles 500 mA g . low-cost -based freestanding has large potential application high-performance SIBs portable, flexible wearable electronics.