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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Self-assembled novel dandelion-like NiCo2O4 microspheres@nanomeshes with superior electrochemical performance for supercapacitors and lithium-ion batteries
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Self-assembled novel dandelion-like NiCo2O4 microspheres@nanomeshes with superior electrochemical performance for supercapacitors and lithium-ion batteries

机译：自组装的新型蒲公英状NiCo2O4微球@纳米颗粒，具有优异的电化学性能，可用于超级电容器和锂离子电池

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Binary metal oxides have been regarded as potential electrode materials for supercapacitors and lithium-ion batteries, which can ameliorate and compensate the deficiency of electrochemical performance of single metal oxides, such as reversible capacitance/capacity, structural stability and electronic conductivity. In this work, we report a facile solvothermal method to synthesize hierarchical dandelion-like NiCo2O4 microspheres@nanomeshes (NCO-M@N) with a high surface area (105.2 m(2) g(-1)), which exhibit superior pseudocapacitive performance with high specific capacitance (2184 F g(-1)), remarkable rate capability and excellent cycling performance (94.2% retention after 4000 cycles), meanwhile, displaying excellent energy storage properties for lithium-ion batteries, such as admirable rate performance (785 mA h g(-1) at a current density of 2000 mA g(-1)) and an outstanding capacity retention of 88% after 100 cycles. Most importantly, when the NCO-M@N//AC asymmetric supercapacitor is prepared, it exhibits the highest energy density (45.3 W h kg(-1)) at a power density of 533.3 W kg(-1) and good cycling stability (89% of the initial capacitance retention at 5 A g(-1) over 4000 cycles), indicating its potential applications for next-generation high power supercapacitors and lithium-ion batteries. The strategy is simple but very effective, and thus it can be extended to other high-capacity metal oxide materials.
机译：二元金属氧化物已被认为是用于超级电容器和锂离子电池的潜在电极材料，它们可以改善和补偿单一金属氧化物的电化学性能的不足，例如可逆电容/容量，结构稳定性和电子导电性。在这项工作中，我们报告了一种容易的溶剂热方法，以合成具有高表面积（105.2 m（2）g（-1））的分层蒲公英状NiCo2O4微球@纳米颗粒（NCO-M @ N），这显示出优异的拟电容性能具有高的比电容（2184 F g（-1）），出色的倍率性能和出色的循环性能（4000次循环后94.2％的保持率），同时，锂离子电池具有出色的储能性能，例如令人赞叹的倍率性能（785）电流密度为2000 mA g（-1）时的mA hg（-1），在100次循环后具有88％的出色容量保持率。最重要的是，当制备NCO-M @ N // AC不对称超级电容器时，它在533.3 W kg（-1）的功率密度下表现出最高的能量密度（45.3 W h kg（-1））和良好的循环稳定性（在4000个循环中5 A g（-1）时的初始电容保持率的89％），表明其在下一代大功率超级电容器和锂离子电池中的潜在应用。该策略简单但非常有效，因此可以扩展到其他高容量金属氧化物材料。

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