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首页> 外文期刊>Journal of power sources >Synthesis and electrochemical properties of Na-rich Prussian blue analogues containing Mn, Fe, Co, and Fe for Na-ion batteries
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Synthesis and electrochemical properties of Na-rich Prussian blue analogues containing Mn, Fe, Co, and Fe for Na-ion batteries

机译:含锰,铁,钴和铁的富钠普鲁士蓝类似物的合成和电化学性能,用于钠离子电池

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摘要

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.
机译:根据先前的研究,已知普鲁士蓝类似物(PBA)作为非水Na-离子电池正极材料的电化学性能高度依赖于其合成条件。在相同条件下,通过沉淀法制备了富Na的PBA NaxM [Fe(CN)(6)]中心点nH(2)O,其中M = Mn,Fe,Co和Ni。对这些样品的结构,化学组成,形态,化合价和电化学性能进行了比较研究。具有Mn的PBA在2.0-4.2 V的电流密度为30 mA g(-1)时显示出126 mAh g(-1)的大可逆容量,并且由于MnN6和MnN6中Mn2 + / 3 +的高氧化还原电势而具有最高的工作电压。 FeC6中的Fe2 + / 3 +。尽管只有66 mAh g(-1),但带有Ni的PBA表现出最佳的循环性和速率性能。 PBA电化学行为的显着差异源于取决于不同过渡金属的各种特性。

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