Manganese oxides nanocrystals supported on mesoporous carbon microspheres for energy storage application

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• 作者：Dae-Hoon Yeom ; Jaeho Choi ; Woo Jin Byun…
• 关键词：Lithium ; ion Battery ; Anode ; Manganese Oxide ; Mesoporous Carbon Microsphere ; Transition Metal Oxide
• 刊名：Korean Journal of Chemical Engineering
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：33
• 期：10
• 页码：3029-3034
• 全文大小：1,314 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Industrial Chemistry and Chemical Engineering
  Catalysis
  Materials Science
  Biotechnology
  
• 出版者：Springer New York
• ISSN：1975-7220
• 卷排序：33

文摘

Mesoporous carbon microspheres (MCM) with a uniform size distribution (1–2 μm in diameter) were replicated from mesoporous silica microspheres (MSM) by using sucrose as a carbon source. MCM (BET surface area=1,001 m2/g, total pore volume=0.82 cc/g, average pore size=3.4 nm) was used as the support of MnO_x nanocrystals (Mn₃O₄ with MnO as a minor phase). The MnO_x/MCM composite was prepared by pore-filling wet-impregnation of Mn nitrate solution followed by a moderate annealing under Ar flow. Thus obtained MnO_x/MCM composite was characterized as a high capacity anode for lithium ion battery (LIB). The electrochemical responses of MnO_x/MCM were investigated in comparison with those of commercial graphite. The MnO_x/MCM composite exhibited the reversible capacity of ∼720 mAh g−1 at the current density of 200 mA g−1 with an excellent cycling stability up to 100 cycles. The MnO_x/MCM composite also showed much higher volumetric capacity and better rate capability than the state of the art graphite anode, suggesting its potential use as a new anode material for LIBs.