Synthesis and characterization of MnCo₂O₄ microspheres based air electrode for rechargeable sodium-air batteries

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• 作者：Mengshi Shang^a ; ^b ; Yu Liu^a ; ^{yuliu@mail.sic.ac.cn} ; Ji Xia^a ; Shuming Zhang^a ; Jianhua Yang^a
• 关键词：Sodium-air batteries ; MnCo2O4 microspheres ; Air electrode ; Electrochemical properties
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：43
• 期：3
• 页码：3218-3223
• 全文大小：1256 K
• 卷排序：43

文摘

In this work, the nanosized porous MnCo2O4 microspheres were synthesized by a hydrothermal method and their electrochemical behaviors were investigated based on a carbon supported composite air electrode for rechargeable sodium-air batteries. Under dry air test condition, the MnCo2O4/C air electrode demonstrated a stable working voltage of around 2.1 V vs. Na+/Na and a high initial discharge capacity of 7709.4 mA h g−1, based on the active material mass, at a current density of 0.1 mA cm−2. By a limit on the depth of discharge, the cell exhibited a specific capacity of 1000 mA h g−1 with a high cycling stability up to 130 cycles. The considerable electrocatalytic activity suggests that the as-proposed MnCo2O4 is a highly efficient catalyst as air electrode for rechargeable sodium-air batteries.