Synthesis and electrochemical studies of manganese oxides with spinel structure in aqueous electrolyte (9 M KOH)

✍ Scribed by H. Schlörb; M. Bungs; W. Plieth

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 575 KB
• Volume: 42
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/s0013-4686(96)00445-8

✦ Synopsis

Oxides with spine1 structure have received widespread attention as being suitable electrode materials for rechargeable Li-ion batteries. So far they have mostly been synthesized at relatively high temperatures of between 700 and 800°C. Here, we describe a new synthesis route to LiMnzOd and manganese dioxides with spine1 structure based on the freeze-drying of aqueous solutions and allowing the preparation of spinels at temperatures of around 400°C. Undoped and Bi doped samples were prepared and investigated electrochemically in strong alkaline electrolyte (9 M KOH) with regard to their charge/discharge properties. As is known from other modifications of manganese dioxides, the cyclability is improved in the presence of bismuth ions.