Abstract
Metal phosphides are attractive candidates for use as anodes in high-performance Li/Na–ion batteries (LIBs/NIBs) owing to their high theoretical capacities and low operating potentials. In this study, CoP2-C hollow nanoboxes (HNBs), that is, CoP2 nanocrystallites (~5–10 nm) embedded in N-doped carbon HNBs, were produced using a simple two-step method and utilized as LIB/NIB anodes. Various cutting-edge ex situ techniques were used to analyze the phase transition mechanism of the CoP2-C HNBs during the Li/Na reaction. The CoP2-C HNBs anode exhibited high initial reversible capacities (LIB: 1082 mAh g−1, NIB: 507 mAh g−1), high-rate capabilities (LIB: 926 mAh g−1 at 3C, NIB: 370 mAh g−1 at 2C), and excellent cycling performance at a high 1C rate (LIB: ~91 % capacity retention over 100 cycles, NIB: ~100 % capacity retention over 100 cycles), respectively. The excellent anode performance of LIBs/NIBs was attributed to the uniformly embedded CoP2 nanocrystallites in the robust N-doped carbon HNBs and the electrochemically driven recombination reaction of CoP2. Therefore, we believe that CoP2-C HNBs are promising high-capacity anodes for LIBs/NIBs, and that this unique HNBs architecture is highly suitable for various energy storage and conversion systems.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
