Abstract
Ni-rich cathodes with nickel content exceeding 90 % are regarded as highly promising for lithium-ion batteries (LIBs). However, the chemical-mechanical degradation caused by strain, side reactions and irreversible phase transitions will accelerate capacity fading. Especially, the mechanical degradation (cracks) caused by anisotropic strain can also accelerate chemical degradation. Herein, we effectively alleviate the anisotropic strain and the resulting cracks by Ti doping, which successfully improved the electrochemical performance of ultra-high Ni cathode. The results demonstrated that Ti doping can effectively refine the primary particles and form a tightly packed structure. Moreover, the stronger Ti-O bond incorporation into bulk efficiently stabilize lattice structure. The unique microstructure and stable lattice structure can effectively alleviate strain accumulation and chemical-mechanical degradation. Therefore, the Ti-modified cathode has the excellent electrochemical performance.
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.
