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Sodium‐Ion Batteries: Understanding the Capacity Fading Mechanisms of O3‐Type Na[Ni 0.5 Mn 0.5 ]O 2 Cathode for Sodium‐Ion Batteries (Adv. Energy Mater. 37/2020)
Author(s) -
Yu TaeYeon,
Ryu HoonHee,
Han Geumjae,
Sun YangKook
Publication year - 2020
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.202070156
Subject(s) - materials science , ion , sodium , cathode , degradation (telecommunications) , phase transition , phase (matter) , fading , condensed matter physics , metallurgy , chemistry , physics , electrical engineering , channel (broadcasting) , organic chemistry , engineering
In article number 2001609, Yang‐Kook Sun and co‐workers explore the capacity fading mechanisms of O3‐type Na[Ni 0.5 Mn 0.5 ]O 2 cathodes for sodium‐ion batteries. A phase transition at a largely desodiated state compromises the mechanical integrity, and a sudden collapse during the phase transition leads to microcrack formation and fracture of the secondary particles. Microcracks traversing the entire secondary particle cause internal degradation of the exposed internal surfaces.