Carbonaceous mesophase spherule/activated carbon composite as anode materials for super lithium ion capacitors

Abstract

A series of carbonaceous mesophase spherule/activated carbon composites were prepared as anode materials for super lithium ion capacitors using carbonaceous mesophase spherules as the core materials and pitch as the active carbon shell precursor. The structures of the composites were examined by scanning electron microscopy and X-ray diffractometry. The electrochemical performance was investigated in electric double layer capacitor and half-cell. The results show that, the composite exhibits good performance in both capacitor and battery with a high reversible capacity of 306.6 mA·h/g (0.2C) in the half-cell, along with a capacitance of 25.8 F/g in the capacitor when an optimum ratio of carbonaceous mesophase spherules to active carbon is adopted. The composite also shows a favorable rate performance and good cycle ability. A working model of this anode in super lithium ion capacitors was established.

Keywords

super lithium ion capacitor / carbonaceous mesophase spherule / active carbon / compound anode

References

[1] PasquierA. D., PlitzI., GuralJ., BadwayF., AmatucciG. G.. Power-ion battery: Bridging the gap between Li-ion and supercapacitor chemistries [J]. J Power Sources, 2004, 136: 160-170

[2] HongyuW., MasakiY., ArjunK. T., HiroyoshiN.. From symmetric AC/AC to asymmetric AC/graphite, a progress in electrochemical capacitors [J]. J Power Sources, 2007, 169: 375-380

[3] MATSUI K, TAKAHATA R, NOBUO A. Lithium ion capacitor: CN 1954397 [P]. 2007-04-25.

[4] AurbachD., TellerH., KoltypinM.. On the behavior of different types of graphite anodes [J]. J Power Sources, 2003, 119: 2-7

[5] LiF.-q., LaiY.-q., ZhangZ.-a., GaoH.-q., YangJuan.. Electrochemical behaviors of Et4NBF4+LiPF6/EC+PC+DMC electrolyte on graphite electrode [J]. Acta Phys Chim Sin, 2008, 24(7): 1302-1306

[6] GambyaJ., TabernaaP. L., SimonP., FauvarqueJ. F., ChesneauM.. Studies and characterisations of various activated carbons used for carbon/carbon super capacitors [J]. J Power Sources, 2001, 101: 109-116

[7] YangJ., LiuY.-f., ChenX.-m., HuZ.-h., ZhaoG.-hua.. Carbon electrode material with high densities of energy and power [J]. Acta Phys Chim Sin, 2008, 24(1): 13-19

[8] KhomenkoV., Raymundo-piñeroE., B’EguinF.. High-energy density graphite/AC capacitor in organic electrolyte [J]. J Power Sources, 2008, 177: 643-651

[9] HongyuW., MasakiY.. Graphite,a suitable positive electrode material for high-energy electrochemical capacitors [J]. Electrochem Commun, 2006, 8: 1481-1486

[10] OSAMU H. Lithium ion capacitor [C]//16th International Seminar on Double Layer: Capacitors & Hybrid Energy Storage Devices. Colombia, USA, 2006: 241–251.

[11] LI Jie, YANG Juan, HAO Xin, ZHANG Zhi-an, LAI Yan-qing, ZHOU Xiang-yang. Carbon composite as anode material electrode in super lithium ion capacitor [C]//TMS 2009 138th Annual Meeting & Exhibition. San Francisco, 2009: 391–398.

[12] DeyangQ.. Studies of the activated carbons used in double-layer supercapacitors [J]. J Power Sources, 2002, 109(2): 403-411

[13] ZhouY. F., XieS., ChenC. H.. Pyrolytic polyurea encapsulated natural graphite as anode material for lithium ion batteried [J]. Electrochimica Acta, 2005, 50: 4728-4735

[14] HanY. S., JungJ. H., LeeJ. Y.. Investigation on the first-cycle charge loss of graphite anodes by coating of the pyrolytic carbon using tumbling CVD [J]. J Electrochem Soc, 2004, 151: A291-A295

[15] LeroyS., MartinezH., DedryvèreR., LemordantD., GonbeauD.. Influence of the lithium salt nature over the surface film formationon a graphite electrode in Li-ion batteries: An XPS study [J]. Appl Surf Sci, 2007, 253: 4895-4905

[16] ConwayB. E.Eletrochemical supercapacitors: Scientific fundamentals and technological applications [M], 1999, New York, Kluwer Academic Pubishers/Plenum Press: 131-132

[17] LewandowskiA., GalinskiM.. Practical and theoretical limits for electrochemical double-layer capacitors [J]. J Power Sources, 2007, 173: 822-828

[18] BryngelssonH., StjerndahlM., GustafssonT., EdströmK.. How dynamic is the SEI [J]. J Power Sources, 2007, 174: 970-975

[19] LI Jie, ZHANG Zhi-an, LAI Yan-qing, ZENG Tao. Super lithium ion capacitor: CN 200710035205.3 [P]. 2007-06-25.

[20] ZHANG Zhi-an, ZENG Tao, LI Jie, LAI Yan-qing. An electrolyte used in super lithium ion capacitor: CN 200710035206.8 [P]. 2007-06-25.