Polymer Template Synthesis of Flexible BaTiO₃ Crystal Nanofibers

Abstract

BaTiO 3 crystals are attractive materials due to their high dielectric properties, but they are brittle and inelastic ceramics, which limits their broader applications in emerging fields, such as flexible electronics. A scalable strategy for the fabrication of ultra-flexible crystalline BaTiO 3 nanofiber (NF) films by a sol-gel electrospinning method, followed by a brief calcination, is reported. It facilitates the formation of perovskite BaTiO 3 crystals with intricate grain boundaries at a low temperatures by growing them within polymer NF templates. The ceramic films have a polymer-like softness of 50 mN, a large Young's modulus of 61 MPa, and an elastic strain of 0.9%. Moreover, they have a low density of 28 mg cm −3 and demonstrate superior softness without fracture after deformation. Piezoelectric sensors fabricated based on these films exhibit a high sensitivity of 80 ms with an output voltage of 1.05 V at a pressure of 100 kPa. This approach allows for the largescale fabrication of flexible BaTiO 3 crystal NF films.

The Application of a Y‐Modified Lanthanum Zirconate Flexible Thin Film for a High‐Performance Flexible Supercapacitor

“…As weaker crystallization occurred at the lower temperatures, the grain sizes of LNF samples decreased clearly with decreasing calcination temperature. However, the LNF thin films with small grain sizes calcined at low temperatures showed excellent macro flexibility, which could be attributed to the stress relaxation at the grain‐boundary layers [11c] . Therefore, the choice of appropriate sintering temperature should consider both flexibility and crystallinity.…”

Highly Curved Nanostructure‐Coated Co, N‐Doped Carbon Materials for Oxygen Electrocatalysis

“…designed a C 60 ‐adsorbed carbon nanotube hybrid material, where C 60 acted as an electron‐acceptor to promote interfacial charge transfer, resulting in high‐performance in ORR/OER [25] . Among various bifunctional ORR/OER catalysts, metal‐nitrogen‐carbon (M‐N‐C) catalysts have become potential candidates [26–34] . Therefore, introducing highly curved carbon structures in M‐N‐C materials is a promising strategy to design active electrocatalysts.…”

Highly Curved Nanostructure‐Coated Co, N‐Doped Carbon Materials for Oxygen Electrocatalysis

“…[25] Among various bifunctional ORR/OER catalysts, metal-nitrogen-carbon (M-N-C) catalysts have become potential candidates. [26][27][28][29][30][31][32][33][34] Therefore, introducing highly curved carbon structures in M-N-C materials is a promising strategy to design active electrocatalysts.…”