Polymer Coating Enabling a Durable Conductive Network for Si-Based Lithium-Ion Batteries.

Silicon nanoparticles (SiNPs) have become a promising class of high-capacity silicon-based anodes. However, their large surface area intensifies severe interfacial side reactions, which impair kinetic performance. In this study, a uniform allyltrimethoxysilane-derived polymer (AP) coating is applied to SiNPs, enhancing the durability of the conductive network by strengthening triphasic contact integrity among SiNPs, conductive additives, and binders.

Cation-driven phase transition and anion-enhanced kinetics for high energy efficiency zinc-interhalide complex batteries.

Aqueous Zn-halogen batteries, valued for high safety, large capacity, and low cost, suffer from the polyhalide shuttle effect and chaotic zinc electrodeposition, reducing energy efficiency and lifespan. Here we show a cation-driven positive electrode phase transition to suppress the shuttle effect and achieve uniform zinc electrodeposition, along with an anion kinetic enhancement strategy to improve energy efficiency and lifespan. Taking tetramethylammonium halide (TMAX, X = F, Cl, Br) as a subject, TMA promotes oriented zinc (101) deposition on the negative electrode through electrostatic shielding, significantly extending cycling life.