A robust network binder via localized linking by small molecules for high-areal-capacity silicon anodes in lithium-ion batteries

Interface‐Adaptive Binder Enabled by Supramolecular Interactions for High‐Capacity Si/C Composite Anodes in Lithium‐Ion Batteries

“…Moreover, the hydrophilic segments (A) are able to establish the connection between Si nanoparticles and Cu collector via H-bonds, which has been widely investigated. [19,20,[30][31][32] Accordingly, the supramolecular interactions of π•••π stacking and H-bonding are expected to synergistically promote the adhesion with the multi-interface Si/C material as demonstrated in the schematic diagram of Figure 2b. As a result, electrode with PSEA binder shows a much larger adhesive strength of 163 N m −1 compared to that with PAA (24 N m −1 ) and NaCMC/SBR binders (100 N m −1 ) even after immersing in the electrolyte for 48 h (Figure 2d; Figure S13 in Supporting Information).…”

“…For this reason, Si anode binders usually rich in polar functional groups (such as OH, COOH, and catechol group) are purposefully designed to form strong interaction with SiOH on the oxidized-hydrolyzed surface layer of Si particle. [19,20,[30][31][32] Consequently, most of these binders are only dedicated to Si or SiO x anodes with hydrophilic SiOH surface layers, which are not suitable for Si/C materials possessing a hydrophobic carbon coating layer (main functional groups: C(sp 3 /sp 2 )-C/H). [33,34] Additionally, the interfacial interactions will increase the spreadability of binders on the surface of active materials, which conduces to maintaining interfacial stability by alleviating the side reactions between electrode and electrolyte.…”

Engineering Nanostructured Silicon and its Practical Applications in Lithium‐Ion Batteries: A Critical Review

“…To realize multiple functions, the concept of binder composites was proposed to combine carbohydrates or common polymer with elastic polymers. [120] This strategy has been applied to devise binders for SiO x . [121] Choi et al [122] incorporated 5 wt% polyrotaxane to conventional PAA binder (Figure 13a).…”

An Aqueous Alginate‐based Binder Modified with Zn2+ Ions and Prussian Blue Analogues for Enhanced Silicon Anodes

“…[12] However, hydrogen bonds existed in alginate polymer is not enough to maintain the structural integration of Si anode. [18] To enhance the binding force between alginate binder and Si, a 3D crosslinked alginate network with enhanced mechanical strength has been designed to significantly suppress volume expansion and prevent Si particles from sliding during cycling. [19][20][21][22][23][24] To this end, based on the crosslink reaction of alginate with divalent or trivalent metal cations, many metal cations have been investigated to fabricate crosslinked alginate polymer binders.…”