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. ., Ϻ . ., . ., 2014 LiMn2O4 - .

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Spinel LiMn2O4 compositions with multiwall carbon nanotubes in lithium layout accumulator for establishment of haracteristics of degradation processes in the redox reaction of spinel composite with lithium have been studied. The method of an electrochemical impedance is used.

Key words: spinel LiMn2O4; carbon nanotubes; lithium accumulator; impedance spectroscopy; degradation.

. ˳- (˲) , , . , , , ˲. , Li CoO2, ˲, LiMn2O4.

Li Mn2O4 . . ˲ . , Li Mn2O4 () [1]. Li Mn2O4 . - . -/ , ' /. Lviv Polytechnic National University Institutional Repository http://ena.lp.edu.ua . /.

. LiMn 2O4 . LiMn 2O4, /Al (Merck) (10 . %) 50 [2]. , 25905 83. 0,20 0,50 -2.

, [3]. 25 30 -3. 10 30 , 230 2-1.

2325 - , Li/Li +- cﳳ VoltaLab PGZ 301.

(, Merck), (, Merck), 1 M LiClO 4 (). 0,006 % . Գ. .

() 100 0,01 Zview, Zplot (Scribner Associates). 287 327 .

. 20 , 200 .

LiMn 2O4, Li/Li +-, 148 -1.

(1), (2) / / [4, 5]:

(4,01/4,05 ) LiMn2O4 Li0,.5Mn2O4 + 0,5 Li+ + 0,5 (1) (4,12/4,14 ) Li0,.5Mn2O4 Mn2O4 + 0,5 Li+ + 0,5. (2) LiMN 2O4, /AL 112 119 -1. . 98 100 -1 22,4 . c , -1, , (1-1) .

LiMn 2O4, /Al 500 - . . 1 ( 1) ( 2).

liMn2O4, /Al- . li/li +-, 4,14 4,05 () 4,12 3,96 () (. 2). , , - 4,14/4,12 4,05/3,96 .

   

. 3 Li Mn2O4, /Al/ , - 4,14/4,12 , , Q = = 98 100 -1. 4,14 , 4,12 .

- . . Lviv Polytechnic National University Institutional Repository http://ena.lp.edu.ua , (. 2, ) (R s) , 䳿 , (s). RctCel, (R ct) /, (C el).



140 .


˳ . ֳ , /, ' . 㳿 (m), / (ct).

   

㳿 , . 㳿 ct . - 4,05/3,9 6 ct . , ct. - 4,14/4,12 (44,26 -1), 80 -1. , 250 .

Lviv Polytechnic National University Institutional Repository http://ena.lp.edu.ua LiMn2O4, /Al- , . . 4 , 50 -1 (. 1, 2).

   

(. 4) (. 3). . , /, . / 򳺿 . 5.

   

. , ' LiMn2O4 , ( 20 ). -/ , / 98 100 -1 47 50 -1. 㳿 / . 㳿 / . . ' . / . , ' / . ̳ , , .

1. Comparison study of LiMn2O4 composites with graphite and carbon nanotubes in the electrodes

for Li-ion batteries / R. Peskov, R. Apostolova, E. Shembel, and M. Danilov // Advanced batteries (ABAF-13):

Accumulators and Fuel Cells: 14th Int. Conf: Abstr. Brno, 2013. p. 4851. 2. Electrochemical behavior of electrodes comprising micro- and nano-sized particles of LiNi0,5Mn1,5O4: A comparative study / Daniela Kovacheva, Boris Markovsky, Gregory Salitra et al. // Electrochim. Acta. 2006. Vol. 50, 28. P. 55535560. 3. . ., / . . , . . , . . // . .

. 2005. . 78. . 938944. 4. Hwang B. J. Characterization of nanoparticles of LiMn2O4 synthesized by citric acid sol-gel method / B. J. Hwang, R. Santhanam, D. G. Liu // J. Power Sources. 2001. Vol. 9798. P. 443446. 5. Eftekhari A. On the fractal study of LiMn2O4 electrode surface / A. Eftekhari // Electrochim Acta. 2003. Vol. 48, 19. P. 2831 2839.

Lviv Polytechnic National University Institutional Repository http://ena.lp.edu.ua



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