Abstract
AbstractNa superionic conductor (NASICON) structured cathode materials with robust structural stability and large Na+ diffusion channels have aroused great interest in sodium‐ion batteries (SIBs). However, most of NASICON‐type cathode materials exhibit redox reaction of no more than three electrons per formula, which strictly limits capacity and energy density. Herein, a series of NASICON‐type Na3+xMnTi1−xVx(PO4)3 cathode materials are designed, which demonstrate not only a multi‐electron reaction but also high voltage platform. With five redox couples from V5+/4+ (≈4.1 V), Mn4+/3+ (≈4.0 V), Mn3+/2+ (≈3.6 V), V4+/3+ (≈3.4 V), and Ti4+/3+ (≈2.1 V), the optimized material, Na3.2MnTi0.8V0.2(PO4)3, realizes a reversible 3.2‐electron redox reaction, enabling a high discharge capacity (172.5 mAh g−1) and an ultrahigh energy density (527.2 Wh kg−1). This work sheds light on the rational construction of NASICON‐type cathode materials with multi‐electron redox reaction for high‐energy SIBs.
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.
