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Nanostructured high‐energy x Li 2 MnO 3 ·(1‐ x )LiNi 0.5 Mn 0.5 O 2 (0.3 ≤ x ≤ 0.6) cathode materials
Author(s) -
Zhang Xiaofeng,
Lengyel Miklos,
Axelbaum Richard L.
Publication year - 2014
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.14287
Subject(s) - spinel , manganese , materials science , composite number , lithium (medication) , phase (matter) , chemical engineering , analytical chemistry (journal) , metallurgy , composite material , chemistry , medicine , organic chemistry , chromatography , engineering , endocrinology
Nanostructured lithium‐manganese‐rich nickel‐manganese‐oxide x Li 2 MnO 3 ·(1‐ x )LiNi 0.5 Mn 0.5 O 2 (0.3 ≤ x ≤ 0.6) composite materials were synthesized via spray pyrolysis using mixed nitrate precursors. All the materials showed a composite structure consisting of Li 2 MnO 3 ( C 2 /m ) and LiNi 0.5 Mn 0.5 O 2 ( R 3 ¯ m ) components, and the amount of Li 2 MnO 3 ‐phase appeared to increase with x, as observed from XRD analysis. These composite materials showed a high‐discharge capacity of about 250 mAhg −1 . In the range of x considered, the layered 0.5Li 2 MnO 3 ·0.5LiNi 0.5 Mn 0.5 O 2 materials displayed the highest capacity and superior cycle stability. Nonetheless, voltage suppression from a layered‐spinel phase transition was observed for all the composites produced. This voltage suppression was dependent of the amount of Li 2 MnO 3 phase present in the composite structure. © 2013 American Institute of Chemical Engineers AIChE J 60: 443–450, 2014