Modafferi Vincenza, Triolo Claudia, Fiore Michele, Palella Alessandra, Spadaro Lorenzo, Pianta Nicolò, Ruffo Riccardo, Patanè Salvatore, Santangelo Saveria, Musolino Maria Grazia
Dipartimento di Ingegneria Civile, dell'Energia, dell'Ambiente e dei Materiali (DICEAM), Università Mediterranea di Reggio Calabria, 89122 Reggio Calabria, Italy.
Dipartimento di Scienza dei Materiali, Università di Milano Bicocca, 20125 Milano, Italy.
Nanomaterials (Basel). 2020 Aug 12;10(8):1588. doi: 10.3390/nano10081588.
The effect of the type of dopant (titanium and manganese) and of the reduced graphene oxide content (rGO, 30 or 50 wt %) of the α-FeO@rGO nanocomposites on their microstructural properties and electrochemical performance was investigated. Nanostructured composites were synthesized by a simple one-step solvothermal method and evaluated as anode materials for sodium ion batteries. The doping does not influence the crystalline phase and morphology of the iron oxide nanoparticles, but remarkably increases stability and Coulombic efficiency with respect to the anode based on the composite α-FeO@rGO. For fixed rGO content, Ti-doping improves the rate capability at lower rates, whereas Mn-doping enhances the electrode stability at higher rates, retaining a specific capacity of 56 mAhg at a rate of 2C. Nanocomposites with higher rGO content exhibit better electrochemical performance.
研究了α-FeO@rGO纳米复合材料中掺杂剂类型（钛和锰）以及还原氧化石墨烯含量（rGO，30或50 wt%）对其微观结构性能和电化学性能的影响。通过简单的一步溶剂热法合成了纳米结构复合材料，并将其作为钠离子电池的负极材料进行评估。掺杂不影响氧化铁纳米颗粒的晶相和形态，但相对于基于复合α-FeO@rGO的负极，显著提高了稳定性和库仑效率。对于固定的rGO含量，Ti掺杂提高了较低倍率下的倍率性能，而Mn掺杂提高了较高倍率下的电极稳定性，在2C倍率下保持56 mAhg的比容量。具有较高rGO含量的纳米复合材料表现出更好的电化学性能。
