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摘要
采用鳞片石墨粉作为铝离子电池正极材料,其不同粒度大小对正极材料的表面特性和电化学性能都有影响。通过X射线衍射、X射线光电子能谱、充放电测试、倍率特性测试和循环性能测试分析该正极材料的晶体结构、化学价态和电化学性能。结果表明:铝离子电池正极材料鳞片石墨粉为良好的层状结构,P63/mc空间群,六方晶系。其中鳞片石墨粉325目(粒度45μm)在1C倍率下的充放电比容量分别为104.76和104.46mAh/g,其5C倍率较1C倍率的容量保持率为71.4%,循环100次后容量保持率为95.19%,因此其充放电比容量、倍率性能、循环性能等电化学性能较佳。
Abstract
The anode material of aluminum-ion battery was made by using flake graphite powder with different particle size,which had influence on the surface property and electrochemical performance of material.By X-ray diffraction (XRD),X-ray photoelectron spectroscopy (XPS),charge and discharge test,ratio characteristics test,cyclic performance test and analysis,the crystal structure,appearance characteristics and electrochemical performance were analyzed.The results showed that flake graphite powder had layered structure,P63/mc space group,hexagonal crystal system and structural stability.When the particle size was 45μm,the charged and discharged capacities were 104.76mAh/g and 104.46mAh/g at 1C,the capacity retention ratio kept 71.4% at 5C ratio than 1C ratio,the ratio was 95.19% at 1C ratio after 100 cycles.Therefore,the flake graphite powder with 45μm particle size can have better charge and discharge specific capacity,ratio characteristics and cycle performance.
关键词
铝离子电池
/
正极材料
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电化学性能
Key words
aluminium-ion battery
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anode material
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electrochemical performance
铝离子电池正极材料的电化学特性研究[J].
化工新型材料, 2018, 46(6): 190-193 DOI:
[1] Lin M C,Gong M,Lu B A,et al.An ultrafast rechargeable aluminium-ion battery[J].Nature,2015,520(7547):325-328.
[2] Michael A,Pan C,Rong Y,et al.High coulombic efficiency aluminum-ion battery using an AlCl3-urea ionic liquid analog electrolyte[J].PNAS,2016,114(5):834-839.
[3] Wu Y P,Gong M,Lin M C,et al.3D Graphitic foams derived from chloroaluminate anion intercalation for ultrafast aluminum-ion battery[J].Advanced Materials,2016,28(41):9218-9222.
[4] Yu X Z,Wang B,Gong D,et al.Graphene nanoribbons on highly porous 3D graphene for high-capacity and ultrastable Al-ion batteries[J].Advanced Materials,2016,29(4):763-768.
[5] Wang S,Yu Z J,Tu J G,et al.A novel aluminum-ion battery:Al/AlCl3-[EMIm]Cl/Ni3S2@graphene[J].Advanced Energy Materials,2016,6(13):653.
[6] Jiao H D,Wang J X,Tu J G,et al.Aluminum-ion asymmetric supercapacitor incorporating carbon nanotubes and an ionic liquid electrolyt[J].Energy Tecnology,2016,4(9):1112-1118.
[7] Gu S C,Wang H L,Wu C,et al.Confirming reversible Al3+ storage mechanism through intercalation of Al3+ into V2O5 nanowires in a rechargeable aluminum battery[J].Energy Storage Materials,2017,6(1):9-17.
[8] Sun S C,Kang Y,Yoo D,et al.Polymer gel electroytes for application in aluminum deposition and rechargeable aluminum ion batteries[J].Chem Commun,2016,52(2):292-295.
[9] Jung S C,Kang Y,Yoo D,et al.Flexible few-layered graphene for the ultrafast rechargeable aluminum-ion battery[J].J Phys Chem C,2016,120(25):13384-13389.
[10] 刘春娜.铝离子电池未来展望[J].电源技术,2015,35(9):879-880.
