프랙탈 차원을 활용한 리튬이차전지용 극판의 전기화학적 활성 수준 분석
Analysis of electrochemical activity level of composite electrodes for lithium secondary batteries using fractal dimensions
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
The effect of PVdF on the electrochemical activity of composite electrodes for Li battery was analyzed using the PVdF-aqueous solution as a model system in terms of fractal dimension(Df). To this end, specimens with different pore structures were prepared by controlling the electrode density and loading, and their electrochemical behavior under diffusion control was analyzed by cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS). The CV results showed a clear difference in Df depending on the pore structure and confirmed that the electrochemical deactivation effect of PVdF is different for different pore structures. Particularly, its deactivation effect was larger at the macroscopic pore level, suggesting that it may be responsible for the inhomogeneous reaction across pore size regions. On the other hand, when EIS was applied, the overall Df was similar to the value from CV, but the ability to distinguish differences in Df according to pore structure was relatively low.
Abstract
The effect of PVdF on the electrochemical activity of composite electrodes for Li battery was analyzed using the PVdF-aqueous solution as a model system in terms of fractal dimension(Df). To this end, specimens with different pore structures were prepared by controlling the electrode density and loading, and their electrochemical behavior under diffusion control was analyzed by cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS). The CV results showed a clear difference in Df depending on the pore structure and confirmed that the electrochemical deactivation effect of PVdF is different for different pore structures. Particularly, its deactivation effect was larger at the macroscopic pore level, suggesting that it may be responsible for the inhomogeneous reaction across pore size regions. On the other hand, when EIS was applied, the overall Df was similar to the value from CV, but the ability to distinguish differences in Df according to pore structure was relatively low.
참고문헌 (24)
- T.H. Kim, "Lithium-ion batteries: Outlook on present, future, and hybridized technologies", Journal of Materials Chemistry A, 7, pp.2942~2964 (2019)
- A. Manthiram, "An outlook on lithium-ion battery technology", ACS Central Science, 3, pp.1063~1069 (2017)
- G. Zubi, "The lithium-ion battery : State of the art and future perspectives", Renewable and Sustainable Energy Reviews, 89, pp.292~308 (2018)
- X. Zhang, "Multiscale understanding and architecture design of high energy", power lithium-ion battery electrodes, 2021, pp.11, 2000808~
- P. Zhu, "Insights into architecture, design and manufacture of electrodes for lithium-ion batteries", Materials & Design, 223, pp.111208~ (2022)
- Z. Yan, "Rational electrode design for enhanced battery performance: Addressing SOC heterogeneity and achieving energy density", Advanced Functional Materials, pp.2415637~ (2024)
- Z. Yan, "Determination and engineering of Li-ion tortuosity in electrode toward high performance of Li-ion batteries", Advanced Energy Materials, 14, pp.2303206~ (2024)
- F. L. Usseglio-Viretta, "Resolving the discrepancy in tortuosity factor estimation for Li-ion battery electrodes through micro-macro modeling and experiment", Journal of The Electrochemical Society, 165, pp.A3403~A3426 (2018)
- Y. Yang, "Quantification of heterogeneous degradation in Li-ion batteries", Advanced Energy Materials, 9, pp.1900674~ (2019)
- D. P. Finegan, "Spatial dynamics of lithiation and lithium plating during highrate operation of graphite electrodes", Energy & Environmental Science, 13, pp.2570~2584 (2020)
- M. Ebner, "X-ray tomography of porous, transition metal oxide based lithium-ion battery electrodes", Advanced Energy Materials, 3, pp.845~850 (2013)
- T. Hutzenlaub, "Three-dimensional reconstruction of a LiCoO2Li-ion battery cathode", Electrochemical and Solid-State Letters, 15, pp.A33~ (2011)
- Y. H. Lee, "Low molecular weight spandex as a promising polymeric binder for LiFePO4electrodes", Advanced Energy Materials, 7, pp.1602147~ (2017)
- G. D. Kang, "Application and modification of poly(vinylidene fluoride) (PVDF) membranes – A review", Journal of Membrane Science, 463, pp.145~165 (2014)
- D. A. Nasrallah, "Structural, thermal, and dielectric properties of porous PVdF", Li4Ti5O12 nanocomposite membranes for high-power lithium-polymer batteries, 2021, pp.32, 1214~1229
- B. B. Mandelbrot, "The fractal geometry of nature", pp.495~ (1983), W.H. Freeman and Co.
- J. Feder, "Fractals", pp.163~183 (1988), Springer
- J.C. Russ, "Fractal surfaces", pp.149~266 (2013), Springer
- S.I. Pyun, "An investigation of fractal characteristics of mesoporous carbon electrodes with various pore structures", Electrochimica Acta, 49, pp.4171~4180 (2004)
- G. J. Lee, "Theoretical approach to ion penetration into pores with pore fractal characteristics during double-layer charging", discharging on a porous carbon electrode, 2006, pp.22, 10659~10665
- M. De Sá, "The relevance of the initial conditions in glassy carbon electrode sensing applications : The ferri", ferrocyanide redox reaction model system in aqueous solution, 2024, pp.489, 144158~
- K. Ghanbari, "Change in morphology of polyaniline", graphite composite: A fractal dimension approach, 2006, pp.156, 911~916
- I. Raistrick, "Impedance Spectroscopy Emphasizing Solid Materials and Systems" (1987), John Wiley & Sons
- T. Pajkossy, "Scaling-law analysis to describe the impedance behavior of fractal electrodes", Physical Review B, 42, pp.709~719 (1990)