Premium
A Mesoporous Iron‐Based Fluoride Cathode of Tunnel Structure for Rechargeable Lithium Batteries
Author(s) -
Li Chilin,
Gu Lin,
Tong Jianwei,
Tsukimoto Susumu,
Maier Joachim
Publication year - 2011
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201002213
Subject(s) - materials science , intercalation (chemistry) , lithium (medication) , electrolyte , cathode , mesoporous material , fluoride , lithium fluoride , chemical engineering , ionic bonding , electrode , ion , nanotechnology , inorganic chemistry , chemistry , catalysis , organic chemistry , medicine , engineering , endocrinology
A fluoride‐based cathode (FeF 3 ·0.33H 2 O) for lithium batteries, the synthesis of which has been reported recently (C. L. Li et al. Adv. Mater. 2010 , 22 , 3650), is described in terms of structure, morphology, and performance. A self‐assembled mesoporous morphology connected with a high specific surface area is obtained through the soft template role of the ionic liquid. The fluoride exhibits a one‐dimensional tunnel structure produced by continuous hexagonal cavities, in which hydration water molecules are located. The high Li‐intercalation activity of carbon‐free FeF 3 ·0.33H 2 O is expected to be associated with various factors, including electrolyte‐infiltratable mesoporosity, wide Li + ‐insertable channels, and medium conductivities. A single solid‐solution reaction mechanism is indicated by potentiostatic intermittent titration technique and ex situ X‐ray diffraction at different reactive potentials.