Designing high-capacity cathode materials for sodium-ion batteries

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• 作者：Zelang Jian ; Haijun Yu ; Haoshen Zhou
• 关键词：High-capacity ; Na-rich layered oxide ; Sodium-ion batteries ; Cathode
• 刊名：Electrochemistry Communications
• 出版年：2013
• 出版时间：September, 2013
• 年：2013
• 卷：34
• 期：Complete
• 页码：215-218
• 全文大小：977 K

文摘

Na-rich layered oxides as cathode materials for sodium-ion batteries were designed using an electrochemical method based on Li-rich layered oxides. The materials show high specific capacity that can reach 234 mAh/g at a current of 5 mA/g. The energy density of this material (644 Wh/kg) is even higher than those of commercial cathodes for lithium-ion batteries, such as LiFePO₄ and LiMn₂O₄. Kinetic analysis of Na⁺ insertion/extraction into/from the Na-rich layered oxide reveals that the Na⁺ diffusion coefficient is about 10^? 14 cm²/s.