TY - JOUR
T1 - Critical role of crystal water for a layered cathode material in sodium ion batteries
AU - Nam, Kwan Woo
AU - Kim, Sangryun
AU - Yang, Eunjeong
AU - Jung, Yousung
AU - Levi, Elena
AU - Aurbach, Doron
AU - Choi, Jang Wook
N1 - Publisher Copyright:
© 2015 American Chemical Society.
PY - 2015/5/26
Y1 - 2015/5/26
N2 - Layered transition metal oxides are considered promising cathodes for sodium ion batteries (SIBs) due to their superior specific capacities. However, they usually suffer from insufficient cycling and rate performance mainly from the structural instability during repeated cycles. We overcome these longstanding challenges by engaging crystal water in the interlayer space of sodium manganese oxide under the Birnessite framework. The crystal water enhances Na ion diffusion both in the crystal host and at the interface, suppresses fatal Mn2+ dissolution, and improves long-term structural stability, leading to excellent performance in rate capability and cycle life. The current study suggests that many hydrated materials can be good candidates for electrode materials of emerging rechargeable batteries that need to deal with the large size or multivalent charge of their carrier ions.
AB - Layered transition metal oxides are considered promising cathodes for sodium ion batteries (SIBs) due to their superior specific capacities. However, they usually suffer from insufficient cycling and rate performance mainly from the structural instability during repeated cycles. We overcome these longstanding challenges by engaging crystal water in the interlayer space of sodium manganese oxide under the Birnessite framework. The crystal water enhances Na ion diffusion both in the crystal host and at the interface, suppresses fatal Mn2+ dissolution, and improves long-term structural stability, leading to excellent performance in rate capability and cycle life. The current study suggests that many hydrated materials can be good candidates for electrode materials of emerging rechargeable batteries that need to deal with the large size or multivalent charge of their carrier ions.
UR - http://www.scopus.com/inward/record.url?scp=84930206842&partnerID=8YFLogxK
U2 - 10.1021/acs.chemmater.5b00869
DO - 10.1021/acs.chemmater.5b00869
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AN - SCOPUS:84930206842
SN - 0897-4756
VL - 27
SP - 3721
EP - 3725
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 10
ER -