Cobalt Hexacyanoferrate as Cathode Material for Na+ Secondary Battery
Cobalt Hexacyanoferrate as Cathode Material for Na+ Secondary Battery
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DOI：
10.7567/apex.6.025802
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发表时间：
2013-02-01
影响因子：
2.3
通讯作者：
Moritomo, Yutaka
中科院分区：
文献类型：
--
作者：
Takachi, Masamitsu;Matsuda, Tomoyuki;Moritomo, Yutaka
研究了六氰高铁酸钴薄膜电极NaxCo[Fe(CN)(6)](0.90)2.9H(2)O对x的结构和电化学性能。该化合物具有135 mAh/g的高容量，对Na的平均工作电压为3.6V，具有良好的可循环性。放电曲线在约3.8 V和约3.4 V处呈现两个平台，分别归因于Fe3+和Co3+的还原过程。非原位x射线衍射（XRD）谱揭示了宿主骨架抗Na+嵌入/脱嵌的坚固性。因此，六氰高铁酸钴是钠离子二次电池（SIB）正极材料的理想候选材料。(C) 2013日本应用物理学会
We investigated structural and electrochemical properties of thin film electrodes of cobalt hexacyanoferrate, NaxCo[Fe(CN)(6)](0.90)2.9H(2)O, against x. The compound exhibits a high capacity of 135 mAh/g and an average operating voltage of 3.6V against Na, with a good cyclability. The discharge curve exhibits two plateaus at approximate to 3.8 and approximate to 3.4 V, which are ascribed to the reduction processes of Fe3+ and Co3+, respectively. The ex situ X-ray diffraction (XRD) profiles reveal the robust nature of the host framework against Na+ intercalation/deintercalation. Thus, cobalt hexacyanoferrate is a promising candidate for the cathode material of sodium-ion secondary battery (SIB). (C) 2013 The Japan Society of Applied Physics