Composite polymer electrolytes (CPE) combining polymer matrix and functional fillers have gained significant attention due to their potential to overcome the limitations of single-component electrolytes. However, the disordered ion transport networks in conventional CPE limit their ionic conductivity and interfacial stability. Here, we propose a shear-induced alignment strategy to construct anisotropic architectures through precisely orienting lithiated cellulose nanocrystals (CNCs-Li) within poly(ethylene oxide) matrices. This ordered microstructure establishes planar Li⁺ transport highways with optimized coordination environments, achieving a room temperature (RT) ionic conductivity of 0.107 mS cm-1, representing a 1.7-fold enhancement over randomly structured counterparts. Facilitated ion migration enables homogeneous lithium deposition, demonstrating long-term cycling of 3200 h at 0.1 mA cm-2 under 60 °C in Li symmetric cells. The assembled LiFePO4/Li ASSLBs can maintain steady operation 500 cycles with an 85% capacity retention at 1 C and 60 °C and deliver RT capacities of 140 mAh g-1 at 0.5 C. This work provides a scalable strategy for designing high-performance CPE through structural anisotropy control.
Inspired by the extraordinary functionality of biological systems that assemble anisotropic nanostructures, there is growing interest in designing multiscale ordered materials to modulate bio-based micro- and nanoscale assemblies for high performance and exceptional functionality. Current strategies for magnetic field-induced alignment of cellulose nanofibers face limitations, often relying on ultra-high magnetic fields or yielding poor orientation with microspherical magnetic particles. This study proposes an ordered assembly of cellulose nanofibers decorated with magnetic nanorods, induced under low magnetic fields. The resulting cellulose films exhibit an orientation parameter greater than 0.8. It demonstrates that the mechanism behind the magnetic field-induced alignment of magnetic nanorods with cellulose nanofibers results from a combination of magnetic torque-induced alignment of the rods and shear orientation driven by radial flow. This highly aligned, magnetically flexible, multiresponsive film achieves a dielectric constant elevated from 8.67 to 15.21. Simply by regulating the cellulose structure, the TENG output performance is improved to 971%. Compared with other complex modified cellulose film methods, the output performance is only enhanced to 760%. This method provides new insights into anisotropic assembly, with potential applications in flexible electronics and self-powered sensors.
危险品化学品经营许可证（带存储）