Abstract
Mn-doped NaV3(PO4)3/C (NaV3-3xMn3x(PO4)3/C) has been synthesized by a facile sol-gel method and evaluated as a promising anode candidate for sodium-ion batteries (SIBs). An effective investigation combining in-situ XRD and ex-situ TEM is conducted to reveal the structure transformation of NaV3-xMnx(PO4)3/C, confirming that Mn substitution can effectively suppresses the unfavorable phase transition and improve the highly structural reversibility. Furthermore, electrochemical measurements indicate that the Na-ion mobility and reaction kinetic of NaV3-3xMn3x(PO4)3/C electrode are significantly enhanced, resulting in enhanced electrochemical performance. Especially, the NaV2.91Mn0.09(PO4)3/C composite displays remarkable rate capability and long cycling stability (a capacity retention of 71.2% after 5000 cycles at an ultrahigh rate of 10C). The strategy with appropriate metal ion substitution is suitable for the electrochemical enhancement of polyanion materials, which provides a new insight to optimal design for SIB anodes.
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.
