Improved Voltage and Cycling for Li+ Intercalation in High-Capacity Disordered Oxyfluoride Cathodes

Shuhua Ren; Ruiyong Chen; Emad Maawad; Oleksandr Dolotko; Alexander A Guda; Viktor Shapovalov; Di Wang; Horst Hahn; Maximilian Fichtner

doi:10.1002/advs.201500128

Improved Voltage and Cycling for Li⁺ Intercalation in High-Capacity Disordered Oxyfluoride Cathodes

Adv Sci (Weinh). 2015 Jun 12;2(10):1500128. doi: 10.1002/advs.201500128. eCollection 2015 Oct.

Authors

Shuhua Ren¹, Ruiyong Chen², Emad Maawad³, Oleksandr Dolotko⁴, Alexander A Guda⁵, Viktor Shapovalov⁵, Di Wang¹, Horst Hahn⁶, Maximilian Fichtner²

Affiliations

¹ Institute of Nanotechnology Karlsruhe Institute of Technology P.O. Box 3640 76021 Karlsruhe Germany.
² Institute of Nanotechnology Karlsruhe Institute of Technology P.O. Box 364076021 Karlsruhe Germany; Helmholtz Institute Ulm 89081 Ulm Germany.
³ Institute of Materials Research Helmholtz-Zentrum Geesthacht 22607 Hamburg Germany.
⁴ Heinz Maier-Leibnitz Zentrum Technische Universität München 85748 Garching Germany.
⁵ International Research Center-Smart Materials Southern Federal University 344090 Rostov-on-Don Russia.
⁶ Institute of Nanotechnology Karlsruhe Institute of Technology P.O. Box 364076021 Karlsruhe Germany; Helmholtz Institute Ulm 89081 Ulm Germany; Joint Research Laboratory Nanomaterials Technische Universität Darmstadt 64287 Darmstadt Germany.

Abstract

New high-capacity intercalation cathodes of Li₂V _x Cr_1-x O₂F with a stable disordered rock salt host framework allow a high operating voltage up to 3.5 V, good rate performance (960 Wh kg^-1 at ≈1 C), and cycling stability.

Keywords: Li‐ion batteries; disordered rock salt; intercalation cathodes; oxyfluoride.