title: In Situ Packaging FeFx into Sack-like Carbon Nanoreactors: A Smart Way To Make Soluble Fluorides Applicable to Aqueous Batteries.
abstract: Ferruginous materials have long attracted great interest in aqueous batteries since Fe is an earth-abundant and low toxic element. However, their practical application is severely hindered by their poor structural stability during deep cycling. To maximize their cyclability, we herein propose a simple and effective method, by in situ packaging Fe-based materials into carbon nanosacks via a facile CVD approach. To verify our strategy, we purposely choose water-soluble Fe2F5 as a study paradigm. The in situ formed Fe2F5@C nanosacks product exhibits prominent anodic performance with high electrochemical activity and capacity, obviously prolonged cyclic lifetime, and outstanding rate capabilities. Besides, by pairing with the cathode of α-Co(OH)2 nanowire arrays@carbon cloth, a full device of rechargeable aqueous batteries has been developed, capable to deliver both high specific energy and power densities (Max. values reaching up to ∼163 Wh kg(-1) and ∼14.2 kW kg(-1)), which shows great potential in practical usage. Our present work may not only demonstrate the feasibility of using soluble fluorides as anodes for aqueous batteries but also provide a smart way to upgrade cyclic behaviors of Fe-based anodes.
authors.affiliation: Institute for Clean Energy and Advanced Materials, Faculty of Materials and Energy, Southwest University , Chongqing 400715, P.R. China.|Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies , Chongqing 400715, P.R. China.
authors.forename: Jian
authors.initials: J
authors.lastname: Jiang
authors.affiliation: Institute for Clean Energy and Advanced Materials, Faculty of Materials and Energy, Southwest University , Chongqing 400715, P.R. China.|Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies , Chongqing 400715, P.R. China.
authors.forename: Linpo
authors.initials: L
authors.lastname: Li
authors.affiliation: Institute for Clean Energy and Advanced Materials, Faculty of Materials and Energy, Southwest University , Chongqing 400715, P.R. China.|Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies , Chongqing 400715, P.R. China.
authors.forename: Maowen
authors.initials: M
authors.lastname: Xu
authors.affiliation: School of Physical Science and Technology, Southwest University , Chongqing 400715, P.R. China.
authors.forename: Jianhui
authors.initials: J
authors.lastname: Zhu
authors.affiliation: Institute for Clean Energy and Advanced Materials, Faculty of Materials and Energy, Southwest University , Chongqing 400715, P.R. China.|Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies , Chongqing 400715, P.R. China.
authors.forename: Chang Ming
authors.initials: CM
authors.lastname: Li
keywords: Fe2F5; aqueous batteries; carbon nanosacks; full cell; water soluble; α-Co(OH)2 nanowire arrays