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High‐Performance Low‐Temperature Li + Intercalation in Disordered Rock‐Salt Li–Cr–V Oxyfluorides
Author(s) -
Chen Ruiyong,
Ren Shuhua,
Mu Xiaoke,
Maawad Emad,
Zander Stefan,
Hempelmann Rolf,
Hahn Horst
Publication year - 2016
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201600033
Subject(s) - intercalation (chemistry) , lithium (medication) , salt (chemistry) , materials science , analytical chemistry (journal) , crystallography , chemistry , nuclear chemistry , inorganic chemistry , medicine , chromatography , endocrinology
At −10 °C and 26 mA g −1 , Li 2 Cr 0.2 V 0.8 O 2 F can deliver a stable high capacity of 250 mAh g −1 (or 690 Wh kg −1 ) over 60 cycles. Even at −20 °C and a current density of 106 mA g −1 , it still delivers a steady capacity and specific energy of about 160 mAh g −1 and 400 Wh kg −1 , respectively, over 100 cycles. Superior performance of Li 2 Cr 0.2 V 0.8 O 2 F over Li 2 VO 2 F and Li 2 CrO 2 F is related to its structural stability and electronic properties.