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	The kinetic and thermodynamic analysis of Li+ in multi-walled carbon nanotubes
	Lin, KZ ; Xu, YH ; Wang, XL
	2010-05-07 ; 2010-05-07
会议名称	Solid State Ionics-2004 ; Symposium on Solid State Ionics ; Boston, MA ; Web of Science
关键词	Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Physics, Condensed Matter
中文摘要	The multi-walled carbon nanotubes (MWNTs) prepared by CVD were used in electrochemical intercalation reaction with Li+. The results of the first several charge-discharge cycles showed that the reversible capacity of the MWNTs was larger than the theoretical capacity of graphitized carbon. The equivalent circuit of the Li+ intercalated into the MWNTs was simulated The diffusion coefficient calculated based on the results of the impedance was in the range between 1 similar to 4x 10(-10) cm(2)s(-1). The diffusion coefficient calculated based on the technique of the chronoamperometery was 3.5 x 10(-10) cm(2)s(-1). The diffusion coefficients of the Li+ reacted with MWNTs was in the range of that of the most carbon materials. Using EMF method the partial molar entropy (Delta S-x) and partial molar enthalpy (Delta H-x) of the Li+ intercalated into the MWNTs were calculated as a function of x in LixC6 at different temperatures. The values of Delta S-x were in the range of 150 similar to 550 J mol(-1)K(-1). The values of Delta H-x at 35 degrees C were ill the range of 40 similar to 110 kJ mol(-1). Both of the Delta S-x and Delta H-x were lower and the changes were smaller than the values of some other carbonaceous materials. By analyzing the results conclusion is obtained that Li+ exist in MWNTs with different types which include adsorption and intercalation types.
会议录出版者	MATERIALS RESEARCH SOCIETY ; WARRENDALE ; 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA
语种	英语 ; 英语
内容类型	会议论文
源URL	[http://hdl.handle.net/123456789/17111]
专题	清华大学
推荐引用方式 GB/T 7714	Lin, KZ,Xu, YH,Wang, XL. The kinetic and thermodynamic analysis of Li+ in multi-walled carbon nanotubes[C]. 见:Solid State Ionics-2004, Symposium on Solid State Ionics, Boston, MA, Web of Science.

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