钠离子电池P2-Na 2/3 Fe x Mn 1-x O 2 正极材料的合成与电化学性能研究
发布时间：2024-03-13 02:46
开发低成本的储能体系对于大规模实施可再生能源技术和改善电网储能至关重要。当前已商用的电子设备用电池价格相对较高,其性能同时也需要进一步提升以满足更高需求。钠离子电池由于钠原材料(如苏打灰、盐等)丰富、便宜且分布广泛,因此具有可大规模应用的优势。为了更好地探究高性能钠离子电池的电化学性能和构效关系,仍需要对电极材料进行广泛的研究。本文即针对低成本的Na2/3[Fex Mn1-x]O2材料的合成和电化学性能进行相关研究。P2-型Na2/3[FexMn1-x]O2(NFMO)中钠离子位于三棱柱位置,该材料对环境友好且成本低廉。采用XRD、SEM和ICP技术分别对材料的结晶度、形貌和组成进行了表征。通过掺杂条件的优化,虽然材料的比容量略微下降,却明显提升了材料的循环稳定性。通过对不同铁含量(x=0.1,0.2,0.3,0.4和0.5)的NFMO材料进行研究,发现当x=0.1时材料具有最佳的电化学性能,Na2/3...
【文章页数】：74 页
【学位级别】：硕士
【文章目录】：
摘要
ABSTRACT
Chapter 1 Intoduction
1.1 Research Background
1.2 Sodium-ion battery history and working principle
1.3 Sodium ion battery cathode materials
1.3.1 Polyanionic cathode material
1.3.2 Fluoride material
1.3.3 Layered oxides
1.3.4 Brief summary
1.4 Anode materials
1.4.1 Carbon materials
1.4.2 Metallic/semimetallic elemental and alloyed materials
1.4.3 Organic anode materials
1.5.Sodium ion battery electrolyte
Chapter 2 Intoduction Experimental material reagents,instruments andcharacterization methods
2.1 Experimental preparations and test instruments
2.2 Characterization of physical properties of materials
2.2.1 X-ray diffraction analysis(XRD)
2.2.2 Scanning Electron Microscopy(SEM)
2.2.3 Atomic Emission Spectroscopy(ICP)
2.3 Material test for electrochemical properties
2.3.1 Battery Assembly
2.3.2 Checking charge and discharge at constant current
2.3.3 AC Impedance Test(EIS)
2.3.4 Cyclic voltammetry results(CV)
Chapter 3 Effect of doping Fe on Crystal Structure,Morphology andElectrochemical Properties of Na2/3MnO2
3.1 Introduction
3.2 Na2/3[FexMn1-x]O2 Material characterization
3.2.1 X-ray diffraction characterization(XRD)
3.2.2 Scanning electron microscope(SEM)
3.2.3 Plasma emission spectroscopy(ICP)
3.3 Electrochemical performance
3.3.1 Cyclic voltammetry results(CV)
3.3.2 Cycle performance and rate capability
3.3.3 Electrochemical impedance spectroscopy
3.4 Electrochemical performance of NFMO-01
3.5 Summary
Chapter 4 Effect of temperature on the performance of Na2/3[Fe0.1Mn0.9]O2
4.1 Introduction
4.2 Na2/3[Fe0.1Mn0.9]O2 Material characterization
4.2.1 X-ray diffraction characterization(XRD)
4.2.2 Scanning electron microscope(SEM)
4.2.3 Plasma emission spectroscopy(ICP)
4.3 Electrochemical performance of Na2/3[Fe0.1Mn0.9]O2
4.3.1 Cycle performance and rate capability
4.3.2 Cyclic voltammetry results(CV)
4.4 Electrochemical impedance spectroscopy
4.5 Summary
Conclusion
Acknowledgements
Reference
本文编号：3927067
【文章页数】：74 页
【学位级别】：硕士
【文章目录】：
摘要
ABSTRACT
Chapter 1 Intoduction
1.1 Research Background
1.2 Sodium-ion battery history and working principle
1.3 Sodium ion battery cathode materials
1.3.1 Polyanionic cathode material
1.3.2 Fluoride material
1.3.3 Layered oxides
1.3.4 Brief summary
1.4 Anode materials
1.4.1 Carbon materials
1.4.2 Metallic/semimetallic elemental and alloyed materials
1.4.3 Organic anode materials
1.5.Sodium ion battery electrolyte
Chapter 2 Intoduction Experimental material reagents,instruments andcharacterization methods
2.1 Experimental preparations and test instruments
2.2 Characterization of physical properties of materials
2.2.1 X-ray diffraction analysis(XRD)
2.2.2 Scanning Electron Microscopy(SEM)
2.2.3 Atomic Emission Spectroscopy(ICP)
2.3 Material test for electrochemical properties
2.3.1 Battery Assembly
2.3.2 Checking charge and discharge at constant current
2.3.3 AC Impedance Test(EIS)
2.3.4 Cyclic voltammetry results(CV)
Chapter 3 Effect of doping Fe on Crystal Structure,Morphology andElectrochemical Properties of Na2/3MnO2
3.2 Na2/3[FexMn1-x]O2 Material characterization
3.2.1 X-ray diffraction characterization(XRD)
3.2.2 Scanning electron microscope(SEM)
3.2.3 Plasma emission spectroscopy(ICP)
3.3 Electrochemical performance
3.3.1 Cyclic voltammetry results(CV)
3.3.2 Cycle performance and rate capability
3.3.3 Electrochemical impedance spectroscopy
3.4 Electrochemical performance of NFMO-01
3.5 Summary
Chapter 4 Effect of temperature on the performance of Na2/3[Fe0.1Mn0.9]O2
4.2 Na2/3[Fe0.1Mn0.9]O2 Material characterization
4.2.1 X-ray diffraction characterization(XRD)
4.2.2 Scanning electron microscope(SEM)
4.2.3 Plasma emission spectroscopy(ICP)
4.3 Electrochemical performance of Na2/3[Fe0.1Mn0.9]O2
4.3.2 Cyclic voltammetry results(CV)
4.4 Electrochemical impedance spectroscopy
4.5 Summary
Conclusion
Acknowledgements
Reference
本文编号：3927067
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