MOF?derived Multi?Shelled NiP ₂ Microspheres as High?Performance Anode Materials for Sodium?/Potassium?Ion Batteries

Development of high capacity, high-rate performance, long cycling life, and low-cost electrode materials is highly desirable for sodium-ion batteries (SIBs) potassium-ion (PIBs) to pave the way their rapid commercialization. Herein, NiP2 nanoparticles loaded in multi-shelled hollow N-doped carbon microspheres (NiP2@MHNC) are successfully prepared. The built-in heterogeneous interfaces between promote Na+/K+ diffusion; robust C–N, N–Ni bonds stabilize structure electrodes accelerate electrons transfer; with large specific surface area effectively buffers volume expansion ensure stability. Endowed aforementioned synergistic effect, NiP2@MHNC exhibits remarkable enhancement electrochemical performance 346.6 mA h g?1 after 300 cycles SIB 142 200 PIBs at 0.1 A g?1. Moreover, effect on reaction kinetics systematically analyzed. Further, mechanism sodium storage also investigated. research experience conclusions this study based interfaces, carbon, open up a meaningful route design other similar advanced composite energy conversion field.