Designed Functional Systems for High-Performance Lithium-Ion Batteries Anode: From Solid to Hollow, and to Core–Shell NiCo2O4 Nanoparticles Encapsulated in Ultrathin Carbon Nanosheets

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• 作者：Liang Peng ; Huijuan Zhang ; Ling Fang ; Yuanjuan Bai ; Yu Wang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：February 24, 2016
• 年：2016
• 卷：8
• 期：7
• 页码：4745-4753
• 全文大小：707K
• ISSN：1944-8252

文摘

Binary metal oxides have been considered as ideal and promising anode materials, which can ameliorate and enhance the electrochemical performances of the single metal oxides, such as electronic conductivity, reversible capacity, and structural stability. In this research, we report a rational method to synthesize some novel sandwich-like NiCo₂O₄@C nanosheets arrays for the first time. The nanostructures exhibit the unique features of solid, hollow, and even core–shell NiCo₂O₄ nanoparticles encapsulated inside and a graphitized carbon layers coating outside. Compared to the previous reports, these composites demonstrate more excellent electrochemical performances, including superior rate capability and excellent cycling capacity. Therefore, the final conclusion would be given that these multifarious sandwich-like NiCo₂O₄@C composites could be highly qualified candidates for lithium-ion battery anodes in some special field, in which good capability and high capacity are urgently required.