采用CoCl2对中间相炭微球进行低温表面修饰,进行了表征和性能测量,并研究对其性能的影响.结果表明,低温热处理中间相炭微球仍以低温炭结构为主,但是微球表面的碳微晶尺寸比内部的大;低温表面热处理能够明显提高中间相炭微球的可逆容量,在不降低充电容量的情况下将首次库仑效率从52.2%提高到87.2%,并改善了循环性能.低温表面修饰使中间炭微球表面碳结构的有序化程度增强,有效地缓解了碳表面的不可逆电化学反应.
参考文献
| [1] | Y.C.Chang,H.J.Sohn,C.H.Ku,Y.G.Wang,Y.Korai,I.Mochid,Anodic performances of mesocarbon microbeads (MCMB) prepared from synthetic naphthalene isotropic pitch,Carbon,37,1285(1999) |
| [2] | M.Ishikawa,H.Kamobara,M.Morita,Li (CF2SO2)2N as an electrolyte salt for rechargeable lithium batteries with graphitized mesocarbon microbeads anodes,Journal of Power Sources,62,229(1996) |
| [3] | A.Mabuchi,K.Tokumitsu,H.Fujimoto,T.Kasuh,Chargedischarge characteristics of the mesocarbon microbeads heat-treated at different temperatures,Journal of the Electrochemical Society,142(4),1041(1995) |
| [4] | LIN Zugeng,YOU Jinkua,ZHU Guangming,WU Guotao,CHEN Maohui,Characterization and electrochemical investigation of boron-doped mesocarbon microbeads anode materials for lithium-ion battery,Electrochemistry,7(3),263(2001)(林祖赓,尤金跨,朱光明,吴国涛,陈茂惠,硼掺杂的中间碳素微球(MCMB)用作锂离子电池负极材料的性能及表征,电化学,7(3),263(2001)) |
| [5] | H.Fujimoto,A.Mabuchi,K.Tokumitsu,T.Kasuh,Irreversible capacity of lithium secondary battery using mesocarbon micro beads as anode material,Journal of Power Sources,54,440(1995) |
| [6] | Y.P.WU,C.Y.JIANG,C.R.WAN,E.Tsuchida,Effects of catalytic oxidation on the electrochemical performance of common natural graphite as an anode material for lithium ion batteries,Electromchemistry Communications,2,272(2000) |
| [7] | F.Tuinstra,J.L.Koenig,Raman spectrum of graphite,The Journal of Chemical Physics,53(3),1126(1970) |
| [8] | M.J.Matthews,M.A.Pimenta,G.Dresselhaus,Origin of dispersive effects of the Raman D band in carbon materials,Physics Review B,59(10),6585(1999) |
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