title: Superior electrochemical performance of N-doped nanocrystalline FeF3/C with a single-step solid-state process.
abstract: FeF3is a promising cathode material for lithium ion batteries but its poor electronic conductivity makes it non-practical. Here, we significantly improve the electrochemical activity of FeF3by reducing the strong ionic character of Fe-F with the replacement of some F with N atoms. N-doped nanocrystalline FeF3/C achieves the best electrochemical performance among FeF3compounds reported to date: ∼95 mA h g-1at 21.1C discharge rate for 250 cycles. The results illustrate that the poor electronic conductivity of metal fluorides can be controlled by doping and this enables FeF3or metal fluorides to be practically utilized in possible applications including energy conversion and storage.
authors.affiliation: Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea. bwkang@postech.ac.kr.
authors.forename: Jangwook
authors.initials: J
authors.lastname: Lee
authors.affiliation: Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea. bwkang@postech.ac.kr.
authors.forename: Byoungwoo
authors.initials: B
authors.lastname: Kang