A Mesoporous Iron-Based Fluoride Cathode of Tunnel Structure for Rechargeable Lithium Batteries

✍ Scribed by Chilin Li; Lin Gu; Jianwei Tong; Susumu Tsukimoto; Joachim Maier

• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 605 KB
• Volume: 21
• Category: Article
• ISSN: 1616-301X
• DOI: 10.1002/adfm.201002213

✦ Synopsis

Abstract

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.