Resilient binder network with enhanced ionic conductivity for High-Areal-Capacity Si-based anodes in Lithium-Ion batteries

Water-soluble densely functionalized poly(hydroxycarbonylmethylene) binder for higher-performance hard carbon anode-based sodium-ion batteries

“…Thereby, the continuous carboxylic acid groups facilitate Na + transport within the polymer domain via a surface hopping mechanism, resulting in a high diffusion coefficient and lower activation energy at the surface of the electrode. 58,59 The R SEI , R CT , E a and D Na + values reveal the formation of a thin SEI due to the influence of the dense carboxylic acid groups present on the surface of the HC electrodes.…”

“…PAA and styrene–butadiene rubber require acrylic acid and styrene–butadiene monomer from petrochemical sources, impacting their sustainability, environment and cost-effectiveness. 58–60 Polymethylene-based polymers are less flexible at their polymer backbone and are expected to show different properties than polyethylene polymers. 44,45 PFA as a binder can passivate the surface defects of hard carbon through hydrogen bonding between the dense carboxylic acid polar functional groups of the binder and the oxygen functional groups present on the surface defects of HC, thereby preventing the defects from being exposed to the electrolyte due to greater amount of functional groups covering the defects and reducing the ability of the defects to decompose the electrolyte and form a thick SEI.…”

Polymeric Binder Design for Sustainable Lithium-Ion Battery Chemistry

“…The ion conductivity of the binder is a critical factor influencing the electrochemical performance of an LIB. When the binder uniformly and densely coats the active material, the impact of ion conductivity on the battery performance increases owing to the enhanced probability of ion transport through the binder [ 89 ]. Particularly for active materials with low ionic and electronic conductivity, such as olivine LFP, the introduction of polymer binders with high ionic conductivity can significantly enhance battery cycling performance [ 90 , 91 ].…”

“…The affinity of the binder with the electrolyte and the wetting amount of the electrolyte are also crucial parameters influencing the ion conductivity of the binder [ 45 , 46 ]. While a higher wetting amount of the electrolyte can be advantageous for lithium-ion transport, excessive wetting can degrade the adhesive performance of the binder and the mechanical strength of the electrode [ 89 ]. Recent research has focused on improving the ion conductivity of binders to achieve high-performance LIBs.…”

Tailoring Three-Dimensional Cross-Linked Networks Based on Water-Soluble Polymeric Materials for Stable Silicon Anode

“…To address these challenges, the strategic engineering of binders has arisen as a promising solution to enhance the structural integrity and performance of Si-based anodes. − According to the movement toward adopting environmentally sustainable materials in the secondary batteries and electric vehicle industries, water-soluble polymeric binders (e.g., carboxymethyl cellulose (CMC), poly­(acrylic acid) (PAA), poly­(vinyl alcohol) (PVA), and so on) have been widely explored. − Their abundant polar functional groups, such as −COOH and −OH, in molecules foster hydrogen bonding with hydroxyl groups on the Si surface, effectively mitigating volumetric changes during the battery cycles. , In addition to the linear polymers mentioned above, a rich variety of PAA-based binders were developed through grafting, polymerization, and postmodification because of the easy modification of carboxyl groups in PAA molecules than others. − Nonetheless, the slipping of the linear or branched polymer chains during the volume expansion still occurs due to the lack of interchain connections, which challenges the long-term stability of Si electrodes …”