RGO/Co3O4 Composites Prepared Using GO-MOFs as Precursor for Advanced Lithium-ion Batteries and Supercapacitors Electrodes
RGO/Co3O4 Composites Prepared Using GO-MOFs as Precursor for Advanced Lithium-ion Batteries and Supercapacitors Electrodes
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DOI：
10.1016/j.electacta.2016.08.110
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发表时间：
2016-10
影响因子：
6.6
通讯作者：
Dongming Yin;Gang Huang;Q. Sun;Qian Li;Xuxu Wang;Dong-Feng Yuan;Chunli Wang;Limin Wang
中科院分区：
文献类型：
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作者：
Dongming Yin;Gang Huang;Q. Sun;Qian Li;Xuxu Wang;Dong-Feng Yuan;Chunli Wang;Limin Wang
在本研究中，以ZIF-67菱形十二面体为模板，氧化石墨烯为底物，采用温和共沉淀法制备了氧化石墨烯- mofs衍生的氧化石墨烯涂层/夹层Co3O4复合材料（标记为氧化石墨烯/Co3O4）。在这些复合材料中，设计了纳米多孔和氧化石墨烯涂层（表示为rGO@Co3O4）/夹层（表示为Co3O4-rGO-Co3O4）结构，这使得复合材料作为锂离子电池（LIBs）和超级电容器（SCs）的电极材料具有很强的应用潜力。本文制备的rGO@Co3O4and co3o4 - rgo - co3o4复合材料不仅具有优异的锂存储性能，具有较高的初始放电比容量（在电流密度为100 mA g - 1时分别为1451和1344 mA h g - 1），优异的循环稳定性（100次循环后保持率分别为96%和95%）和令人惊叹的倍率性能（在电流密度为2000 mA g - 1时分别为328和450 mA h g - 1），而且具有优异的赝电容性能，具有较高的比电容（546 F g - 1）。卓越的倍率能力和卓越的循环稳定性（在5 A g−1下循环10000次后初始电容保持率为90%）。卓越的多孔结构和导电性使GO-MOFs衍生的过渡金属氧化物复合材料成为下一代lib和SCs的有前途的电极材料。
In this study, GO-MOFs derived rGO coating/sandwiching Co3O4composites (denoted as rGO/Co3O4) are fabricated by employing a temperate coprecipitation method with ZIF-67 rhombic dodecahedron as a template and GO as a substrate. In these composites, nanoporous and rGO coating (denoted as rGO@Co3O4)/sandwiching (denoted as Co3O4-rGO-Co3O4) structures are designed, which endow the composites with strong potential application as electrode materials for lithium-ion batteries (LIBs) and supercapacitors (SCs). Here, the as-prepared rGO@Co3O4and Co3O4-rGO-Co3O4composites not only exhibit outstanding lithium storage performances with high initial discharge specific capacities (1451 and 1344 mA h g−1at a current density of 100 mA g−1), excellent cycling stabilities (above 96% and 95% retention after 100 cycles) and admirable rate capabilities (328 and 450 mA h g−1at a current density of 2000 mA g−1), but also display superior pseudocapacitive properties with high specific capacitance (546 F g−1), remarkable rate capability and brilliant cycling stability (90% of initial capacitance retention at 5 A g−1after 10000 cycles). The remarkable porous architecture and electrical conductivity enables GO-MOFs derived transition metal oxide composites to be promising electrode materials for next generation LIBs and SCs.