Characterization of Prussian blue as positive electrode materials for sodium-ion batteries

被引：33

作者：

Minowa, Hironobu ^{[1
,2
]}

Yui, Yuhki ^{[1
]}

Ono, Yoko ^{[1
]}

Hayashi, Masahiko ^{[1
]}

Hayashi, Katsuya ^{[1
]}

Kobayashi, Ryuchi ^{[1
]}

Takahashi, Kazue I. ^{[1
,2
]}

机构：

[1] NTT Corp, Energy & Environm Syst Labs, Atsugi, Kanagawa 2430198, Japan

[2] Kanazawa Univ, Grad Sch Nat Sci & Technol, Kanazawa, Ishikawa 9201192, Japan

来源：

SOLID STATE IONICS | 2014年 / 262卷

关键词：

Sodium-ion battery; Positive electrode; Prussian blue; Thermally treatment; CATHODE;

D O I：

10.1016/j.ssi.2013.12.024

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Prussian blue, KxFey[Fe(CN)(6)](z)/nH(2)O, was investigated as a positive electrode material for sodium-ion batteries. A Na cell with a Prussian blue positive electrode exhibited a first discharge capacity of 57 mAh/g. However, the discharge capacity rapidly decreased. It appears that the lattice parameter of Prussian blue changes and electron conductivity is gradually lost. Then, we attempted to improve the cycle performance of the cell with a positive electrode using high conductivity carbon, ketjen black EC600JD. As a result, a positive electrode of Prussian blue and ketjen black exhibited a first discharge capacity of 67 mAh/g and exhibited a retention of more than 80% at the 40th cycle. Moreover, the positive electrode was improved owing to dehydration caused by the thermal treatment of the Prussian blue. Prussian blue showed a reversible Na+ intercalation potential around 2.5 V vs. Na, which corresponds to the redox of Fe2+/Fe3+. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：216 / 219

页数：4

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