Synthesis of layered MnO2 by calcination of KMnO4 for rechargeable lithium battery cathode

被引：103

作者：

Komaba, S ^{[1
]}

Kumagai, N ^{[1
]}

Chiba, S ^{[1
]}

机构：

[1] Iwate Univ, Fac Engn, Dept Appl Chem & Mol Sci, Morioka, Iwate 0208551, Japan

来源：

ELECTROCHIMICA ACTA | 2000年 / 46卷 / 01期

关键词：

manganese oxide; lithium battery; layer structure; lithium intercalation; potassium permanganate;

D O I：

10.1016/S0013-4686(00)00535-1

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Layered manganese oxide (KxMnO2) powders were synthesized by simple decomposition of KMnO4 at 300-800 degreesC in air. These manganese oxides were characterized by powder X-ray diffractometry, atomic absorption spectrometry, chemical redox titration, and X-ray photoelectron spectroscopy. Their electrochemical performances for secondary lithium batteries were investigated in a LiClO4-propylene carbonate(PC) solution. After removing side products, which were water soluble, the KxMnO2 (x less than or equal to 0.484) cathode unerwent reversible electrochemical intercalation/deintercalation of lithium. When the KxMnO2 powders were synthesized at 300 degreesC and then, washed with water or acidic solution after the synthesis, they exhibited satisfactory behavior with a specific capacity of 130-140 mAh g(-1) in the region of 3 V vs. Li/Li+ for more than 20 cycles. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：31 / 37

页数：7