期刊
CHEMISTRY OF MATERIALS
卷 27, 期 10, 页码 3721-3725出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.5b00869
关键词
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资金
- National Research Foundation of Korea (NRF) - Korea government (MEST) [NRF-2010-CIAAA001-0029031, NRF-2012-R1A2A1A01011970, NRF-2014R1A4A1003712]
- NPRP from the Qatar National Research Fund (Qatar Foundation) [5-569-2-232]
- Industrial Strategic technology development program - Ministry of Trade, Industry & Energy (MI, Korea) [10050477]
- National Research Foundation of Korea [10Z20130011056] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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.
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