Langmuir, Год журнала: 2025, Номер unknown

Опубликована: Апрель 3, 2025

Graphite anodes, with their capacity nearing the theoretical maximum of 372 mA h g-1, are increasingly being complemented by silicon-based materials, which offer a 10-fold higher capacity. Nevertheless, extreme volume expansion (>300%) Si during cycling poses significant challenges to its practical deployment. Previous studies on synthesis binders often intricate and not conducive large-scale implementation. In this study, an innovative binder, denoted as HM, is developed combining macromolecular polysaccharide sodium hyaluronate small organic molecule malic acid without need for any external triggers. A cross-linked network structure formed in situ after heat treatment silicon under vacuum conditions. The contact interface establishes robust through multiple hydrogen bonds chemical interactions. Consequently, HM binder exhibits exceptional mechanical properties efficiently lessens volumetric change particles, thereby benefiting generation stable solid electrolyte interphase. Electrochemical characterization demonstrates that stability Si@HM electrodes can maintain high 1949 g-1 at 0.1 C 1426 0.5 100 cycles. Furthermore, anodes employing demonstrate superior rate performance reduced internal resistance compared those conventional binders, representing advancement performance. This research provides crucial perspectives design experimental evidence commercial utilization within lithium-ion batteries.

Язык: Английский