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Electrochemical Activity of Hematite Phase in Full‐Cell Li‐ion Assemblies
Author(s) -
Aravindan Vanchiappan,
Lee YunSung
Publication year - 2018
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201702841
Subject(s) - materials science , hematite , electrochemistry , commercialization , polarization (electrochemistry) , cathode , anode , electrode , chemical engineering , ion , nanotechnology , fabrication , phase (matter) , engineering physics , metallurgy , electrical engineering , medicine , chemistry , physics , alternative medicine , quantum mechanics , pathology , political science , law , engineering , organic chemistry
Exploring negative electrodes for high‐performance Li‐ion power packs and related issues that are hampering their commercialization is a particularly important topic of research. This study investigates the electrochemical activity of low‐cost and typical conversion‐type hematite (α‐Fe 2 O 3 ) anodes in practical assemblies, namely, full‐cell configurations. Numerous studies have reported improvements in the electrochemical activity of α‐Fe 2 O 3 in half cells with Li by tuning the morphology or formulating composites with carbonaceous materials. However, these studies are not sufficient to market them for practical assemblies with conventional cathodes like LiCoO 2 , LiMn 2 O 4 , LiFePO 4 and its derivatives, mainly because of large polarization problems, such as, hysteresis, irreversible capacity loss, volume variation, and capacity fading. Eliminating these issues in the fabrication of full cells is necessary, and this study reviews relevant research activities and discusses future prospects in the field.