Browse > Article
http://dx.doi.org/10.9713/kcer.2017.55.2.242

Study on LiFePO4 Composite Cathode Materials to Enhance Thermal Stability of Hybrid Capacitor  

Kwon, Tae-Soon (Korea Railroad Research Institute)
Park, Ji-Hyun (Korea Railroad Research Institute)
Kang, Seok-Won (Korea Railroad Research Institute)
Jeong, Rag-Gyo (Korea Railroad Research Institute)
Han, Sang-Jin (VINA Technology Co., Ltd.)
Publication Information
Korean Chemical Engineering Research / v.55, no.2, 2017 , pp. 242-246 More about this Journal
Abstract
The application of composite cathode materials including $LiFePO_4$ (lithium iron phosphate) of olivine crystal structure, which has high thermal stability, were investigated as alternatives for hybrid battery-capacitors with a $LiMn_2O_4$ (spinel crystal structure) cathode, which exhibits decreased performance at high temperatures due to Mn-dissolution. However, these composite cathode materials have been shown to have a reduction in capacity by conducting life cycle experiments in which a $LiFePO_4$/activated carbon cell was charged and discharged between 1.0 V and 2.3 V at two temperatures, $25^{\circ}C$ and $60^{\circ}C$, which caused a degradation of the anode due to the lowered voltage in the anode. To avoid the degradation of the anode, composite cathodes of $LiFePO_4/LiMn_2O_4$ (50:50 wt%), $LiFePO_4$/activated carbon (50:50 wt%) and $LiNi_{1/3}Co_{1/3}Mn_{1/3}O_2$ (50:50 wt%) were prepared and the life cycle experiments were conducted on these cells. The composite cathode including $LiNi_{1/3}Co_{1/3}Mn_{1/3}O_2$ of layered crystal structure showed stable voltage behavior. The discharge capacity retention ratio of $LiNi_{1/3}Co_{1/3}Mn_{1/3}O_2$ was about twice as high as that of a $LiFePO_4/LiMn_2O_4$ cell at thermal stability experiment for a duration of 1,000 hours charged at 2.3 V and a temperature of $80^{\circ}C$.
Keywords
$LiFePO_4$; Composite cathode; Hybrid capacitor; $LiNi_{1/3}Co_{1/3}Mn_{1/3}O_2$; Thermal stability;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Yu, G., Xie, X., Pan, L., Bao, Z. and Cui, Y., "Hybrid Nanostructured Materials for High-performance Electrochemical Capacitors," Nano Energy, 2(2), 213-234(2013).   DOI
2 Lee, S. W., Park, D. K., Lee, J. K., Ju, J. B. and Sohn, T. W., "Discharge Capacitance of Electric Double Layer Capacitor with Electrodes Made of Carbon Nanotubes Directly Deposited on SUS304 Plates," Korean J. Chem. Eng., 18(3), 371-375(2001).   DOI
3 Sharma, P. and Bhatti, T.S., "A Review on Electrochemical Doublelayer Capacitors," Energy Conv. Manag., 51, 2901-2912(2010).   DOI
4 Ko, H. S., Choi, J. E. and Lee, J. D., "Electrochemical Characteristics of Hybrid Capacitor using Core-shell Structure of $MCMB/Li_{4-}Ti_5O_{12}$ Composite," Korean Chem. Eng. Res., 52(1), 52-57(2014).   DOI
5 Choi, J. E., Bae, G. Y., Yang, J. M. and Lee, J. D., "The Electrochemical Characteristics of Hybrid Capacitor Prepared by Chemical Activation of NaOH," Korean Chem. Eng. Res., 51(3), 308-312 (2013).   DOI
6 Yao, Y., McDowell, M. T., Ryu, I., Wu, H., Liu, N., Hu, L., Nix, W. D. and Cui, Y., "Interconnected Silicon Hollow Nanospheres for Lithium-ion Battery Anodes with Long Cycle Life," Nano Lett., 11(7), 2949-2954(2011).   DOI
7 Jiang, J., Tan, G., Peng, S., Qian, D., Liu, J., Luo, D. and Liu, Y., "Electrochemical Performance of Carbon-coated $Li_3V_2(PO_4)_3$ as a Cathode Material for Asymmetric Hybrid Capacitors," Electrochim. Acta, 107, 59-65(2013).   DOI
8 Wang, Y. G., Lou, J. Y., Wu, W., Wang, C. X. and Wang, Y. Y., "Hybrid Aqueous Energy Storage Cells using Activated Carbon and Lithium-ion Intercalated Compounds:III. Capacity Fading Mechanism of LiCo1/3Ni1/3Mn1/3O2 at Different pH Electrolyte Solutions," J. Electrochem. Soc., 154, A228(2007).   DOI
9 Karthikeyan, K., Aravindan, V., Lee, S. B., Jang, I. C., Lim, H. H., Park, G. J., Yoshio, M. and Lee, Y. S., "A Novel Asymmetric Hybrid Supercapacitor Based on $Li_2FeSiO_4$ and Activated Carbon Electrodes," J. Alloy. Compd., 504(1), 224-227(2010).   DOI
10 Cericola, D., Novk, P., Wokaun, A. and Ktz, R., "Hybridization of Electrochemical Capacitors and Rechargeable Batteries: An Experimental Analysis of the Different Possible Approaches Utilizing Activated Carbon, $Li_4Ti_5O_{12}$ and $LiMn_2O_4$," J. Power Sources, 196(23), 10305-10313(2011).   DOI
11 Aravindan, V., Sundaramurthy, J., Kumar, P. S., Lee, Y. S., Ramakrishna S. and Madhavi, S., "Electrospun Nanofibers: A Prospective Electroactive Material for Constructing High Performance Li-ion Batteries," Chem. Commun., 51, 2225-2234(2015).   DOI
12 Kim, S., Kim, S., Kim, J., Kim, U., Hwang, H. and Cho, W., "Synthesis and Electrochemical Properties of $LiFePO_4$ by Citrate Process," Trans. of the Korean Hydrogen and New Energy Society, 22(5), 728-734(2011).
13 Wang, J., Yao, X., Zhou, X. and Liu, Z., "Synthesis and Electrochemical Properties of Layered Lithium Transition Metal Oxides," J. Mater. Chem., 21, 2544-2549(2011).   DOI