期刊
JOURNAL OF POWER SOURCES
卷 378, 期 -, 页码 322-330出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2017.12.052
关键词
Na-ion battery; Prussian blue analogues; Positive electrode; Electrochemical performance
资金
- MEXT program Elements Strategy Initiative to Form Core Research Center, MEXT
- Ministry of Education, Culture, Sports, Science and Technology, Japan
- Grants-in-Aid for Scientific Research [16K14103] Funding Source: KAKEN
Electrochemical performance of Prussian blue analogues (PBAs) as positive electrode materials for non-aqueous Na-ion batteries is known to be highly dependent on their synthesis conditions according to the previous researches. Na-rich PBAs, NaxM[Fe(CN)(6)]center dot nH(2)O where M = Mn, Fe, Co, and Ni, are prepared via precipitation method under the same condition. The structure, chemical composition, morphology, valence of the transition metals, and electrochemical property of these samples are comparatively researched. The PBA with Mn shows large reversible capacity of 126 mAh g(-1) in 2.0-4.2 Vat a current density of 30 mA g(-1) and the highest working voltage owning to high redox potential of Mn2+/3+ in MnN6 and Fe2+/3+ in FeC6. While, the PBA with Ni exhibits the best cyclability and rate performance though only 66 mAh g(-1) is delivered. The significant differences in electrochemical behaviors of the PBAs originate from the various properties depending on different transition metals.
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