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Al‐substituted stable‐layered P2‐Na 0 . 6 Li 0 . 15 Al 0 . 15 Mn 0 . 7 O 2 cathode for sodium ion batteries
Author(s) -
Chen Xiaoli,
Zhao Zebi,
Huang Kai,
Tang Haolin
Publication year - 2021
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.6606
Subject(s) - cathode , ion , sodium , phase (matter) , materials science , chemical engineering , analytical chemistry (journal) , chemistry , organic chemistry , metallurgy , engineering
Summary P2‐type Mn‐based layered oxides have been considered as one of the most commercial potential cathodes for the sodium‐ion batteries (SIBs) owing to the low cost, low toxicity, and abundant compositions. However, the P2‐type cathode still possesses a lot of drawbacks, such as the unfavorable phase transition and poor‐rate performance during the desosidation/sodiation process. Herein, we developed P2‐Na 0.6 Li 0.15 Al 0.15 Mn 0.7 O 2 as a promising sodium cathode with a stable performance. The batteries with this new cathode deliver 184.9 mAh/g initial reversible capacity at 0.2 C and exhibit preferable rate properties. By investigating multiple characterizations, the Al‐substituted P2‐Na0.6Li0.15Al0.15Mn0.7O2 is found to be absent of phase transition in the first cycle process from the ex‐situ XRD characterization results. In addition, the surface charge transfer reactions have been also investigated. This work may shed substantial light on developing high‐rate capability and stable Mn‐based cathode materials for practical SIBs.