Fabrication of high-power electrode based on nanocellulose


A multi-dimensional graded electrode based on nanocellulose was fabricated to break through the operation rate limit of conventional Li-ion batteries. A layer-by-layer structure of functionalized nanocellulose particles through a bottom-up approach by controlled self-assembly and locking the structure by rapid freezing into a hierarchical micro-structure. Where the nanocellulose forms a mechanical scaffold, the ECGO provides electronic conduction, and the cathode particles give electrochemical activity. The nanocellulose particles were functionalized by attaching functional groups which can be associated with Li+. Experimental technology and phase-field simulation were combined to study and fabricate the integrated electrode. The prepared LFP electrode delivered a discharge capacity of 100 mAh g-1 and 90 mAh g-1 at the current density of 150 mA g-1 and 500 mA g-1, respectively. This result indicated that the integrated electrode shows an enhanced power capacity compared with the pristine one.