Science Daily March 29, 2023
High-capacity anode materials are promising candidates for increasing the energy density of lithium (Li)-ion batteries due to their high theoretical capacities. However, a rapid capacity fading due to the huge volume changes during charge-discharge cycles limits practical applications. Researchers in South Korea developed a layering-charged polymeric binder that could effectively integrate high-capacity anodes using a strong yet reversible Coulomb interaction and enriched hydrogen bonding. The charged polymeric binder built a dynamically charge-directed network on the active materials with high versatility and efficiently dissipated the electrode stress with mechanical properties. In addition, poly(ethylene glycol) (PEG) moieties of the charged binder offer a fast Li-ion conduction pathway that can form an ultra-thick silicon oxide-based electrode without compromising the reversible specific capacity and promote effective charge interaction as a mechanical modulator. According to the researchers charge-directed binder provides insights into the rational design of a binder for high-capacity anodes… read more. TECHNICAL ARTICLEÂ
Research Image. Credit: POSTECH