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A New CuO‐Fe 2 O 3 ‐Mesocarbon Microbeads Conversion Anode in a High‐Performance Lithium‐Ion Battery with a Li 1.35 Ni 0.48 Fe 0.1 Mn 1.72 O 4 Spinel Cathode
Author(s) -
Di Lecce Daniele,
Verrelli Roberta,
Campanella Daniele,
Marangon Vittorio,
Hassoun Jusef
Publication year - 2017
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201601638
Subject(s) - anode , faraday efficiency , materials science , electrochemistry , lithium (medication) , cathode , electrolyte , chemical engineering , dielectric spectroscopy , battery (electricity) , electrode , lithium ion battery , spinel , analytical chemistry (journal) , chemistry , medicine , power (physics) , physics , engineering , quantum mechanics , metallurgy , endocrinology , chromatography
A ternary CuO‐Fe 2 O 3 ‐mesocarbon microbeads (MCMB) conversion anode was characterized and combined with a high‐voltage Li 1.35 Ni 0.48 Fe 0.1 Mn 1.72 O 4 spinel cathode in a lithium‐ion battery of relevant performance in terms of cycling stability and rate capability. The CuO‐Fe 2 O 3 ‐MCMB composite was prepared by using high‐energy milling, a low‐cost pathway that leads to a crystalline structure and homogeneous submicrometrical morphology as revealed by XRD and electron microscopy. The anode reversibly exchanges lithium ions through the conversion reactions of CuO and Fe 2 O 3 and by insertion into the MCMB carbon. Electrochemical tests, including impedance spectroscopy, revealed a conductive electrode/electrolyte interface that enabled the anode to achieve a reversible capacity value higher than 500 mAh g −1 when cycled at a current of 120 mA g −1 . The remarkable stability of the CuO‐Fe 2 O 3 ‐MCMB electrode and the suitable characteristics in terms of delivered capacity and voltage‐profile retention allowed its use in an efficient full lithium‐ion cell with a high‐voltage Li 1.35 Ni 0.48 Fe 0.1 Mn 1.72 O 4 cathode. The cell had a working voltage of 3.6 V and delivered a capacity of 110 mAh g cathode −1 with a Coulombic efficiency above 99 % after 100 cycles at 148 mA g cathode −1 . This relevant performances, rarely achieved by lithium‐ion systems that use the conversion reaction, are the result of an excellent cell balance in terms of negative‐to‐positive ratio, favored by the anode composition and electrochemical features.