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题名: Influence of Structural Imperfection on Electrochemical Behavior of Prussian Blue Cathode Materials for Sodium Ion Batteries
作者: Yang, Y; Liu, ES; Yan, XM; Ma, CR; Wen, W; Liao, XZ; Ma, ZF
刊名: JOURNAL OF THE ELECTROCHEMICAL SOCIETY
出版日期: 2016
卷号: 163, 期号:9, 页码:A2117-A2123
DOI: 10.1149/2.0031610jes
通讯作者: Liao, XZ ; Ma, ZF (reprint author), Shanghai Jiao Tong Univ, Shanghai Electrochem Energy Devices Res Ctr, Dept Chem Engn, Shanghai 200240, Peoples R China.
文章类型: 期刊论文
英文摘要: Prussian blue compounds (PBs) have been intensely studied as promising cathode materials for sodium ion batteries due to their rigid open framework which benefits Na+ insertion/extraction. However, the existence of Fe(CN)(6) vacancies occupied by coordinating H2O in the framework has great influence on the electrochemical performance. In this work, we prepared PB compounds using simple solution precipitation method at 0 degrees C, 40 degrees C and 80 degrees C, respectively. The obtained Na1.73Fe[Fe(CN)(6)](0.98)square(0.02) (PB0), Na1.27Fe[Fe(CN)(6)](0.94)square(0.06) (PB40) and Na1.12Fe[Fe(CN)(6)](0.92)square(0.08) (PB80) samples were investigated to clarify the effects of Fe(CN) 6 vacancies and the coordinating H2O molecules on the electrochemical behavior. CV tests indicated that coordinating H2O could be gradually extracted and attend side reaction at near 4.0V, which led to impedance growth and caused capacity decrease during cycling. Dehydrated PB samples showed increased reversible capacities. However, the cycling stability of the PBs mainly depended on the perfection of the lattice structure. Low defect structure Na1.73Fe[Fe(CN)(6)](0.98)square(0.02) exhibited superior cycling stability with initial reversible capacity of 105 mAh g(-1) (100 mA g(-1)) and intact cubic phase lattice structure during long term cycling. Dehydrated Na1.73Fe[Fe(CN)(6)](0.98)square(0.02) showed further improved reversible capacities of 123 mAh g(-1) (100 mA g(-1)) with 73% capacity retention after 200 cycles. (C) 2016 The Electrochemical Society. All rights reserved.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000388988100043
ISSN号: 0013-4651
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/26541
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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