Enhanced electrochemical performance of NiCo–LDH by inner sulfur doping design

. The excellent performance is attributed to the S-doping core, which facilitates the rapid electron transfer and exposes redox-active sites, while the NiCo-LDH shell limits the migration of sulfur atoms from the interior to interfacial region, thereby reducing sulfur and metal element dissolution losses. This work provides new insights into the rational structure design of high-performance LDHs with both high energy density and long lifespan.