Toward Li-ion Graphite Anodes with Enhanced Mechanical and Electrochemical Properties Using Binders from Chemically Modified Cellulose Fibers

Cellulose nanofibers (CNFs) are bio-sourced nanomaterials, which, after proper chemical modification, exhibit a unique ability to disperse carbon-rich micro- and nanomaterials can be used in the design of mechanically strong functional nanocomposites. When preparation graphite anodes for Li-ion batteries, they have potential outperform conventional binders such as carboxymethyl cellulose (CMC) styrene–butadiene rubber (SBR) both electrochemically mechanically. In this study, cellulose-rich fibers were subjected three different modifications (including carbonyl-, carboxyl-, aldehyde-functionalization) facilitate their fibrillation into CNFs during aqueous slurries carbon black. Using these binders, prepared through blade coating. Compared CMC/SBR reference anodes, all with modified cellulosic performed better galvanostatic cycling experiments mechanical cohesion tests to. Among them, aldehyde- carboxyl-rich best resulted 10% increase specific capacity simultaneous two- three-fold electrode material’s stress-at-failure strain-at-break, respectively. In-depth characterizations attributed results distinctive nanostructure surface chemistry composites formed between fiber-based binders.