Solution synthesis of nanometric layered cobalt oxides for electrochemical applications

被引：18

作者：

Petrissans, Xavier ^{[1
]}

Betard, Angelique ^{[1
]}

Giaume, Domitille ^{[1
]}

Barboux, Philippe ^{[1
]}

Dunn, Bruce ^{[2
]}

Sicard, Lorette ^{[3
]}

Piquemal, Jean-Yves ^{[3
]}

机构：

[1] Chim ParisTech, CNRS UMR 7574, Chim Matiere Condensee Paris, F-75005 Paris, France

[2] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA

[3] Univ Paris Diderot, Lab ITODYS, F-75205 Paris 13, France

来源：

ELECTROCHIMICA ACTA | 2012年 / 66卷

关键词：

NaxCoO(2) nanoparticles; Colloidal oxide; Ionic exchange; Pseudocapacitor; Cyclic voltammetry; INTERCALATION; HYDROXIDE; ELECTRODE; BEHAVIOR; LICOO2; TEMPERATURE; PERFORMANCE; CAPACITANCE; PRECURSORS; NANOSHEETS;

D O I：

10.1016/j.electacta.2012.01.104

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Dispersed Na0.6CoO2 center dot yH(2)O and Li0.5CoO2 powders have been obtained at room temperature by rapid precipitation in aqueous solutions of LiOH or NaOH in the presence of a strong oxidizer. The precipitates are well crystallized and consist of nanoscale platelets with high specific area (above 100 m(2)/g). The Li0.5CoO2 phase is stable in aqueous electrolytes whereas the Na0.6CoO2 center dot yH(2)O rapidly converts to CoOOH in neutral electrolytes or pure water. It also transforms to anhydrous Na0.6CoO2 upon drying at moderate temperatures. Electrochemical studies show that at slow sweep rates the Na0.6CoO2 center dot yH(2)O can store large amounts of charge in 10 M NaOH from a combination of both faradic and capacitive reactions. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：306 / 312

页数：7

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