계면안정화를 통한 Si-SiO2-흑연 복합재 음극의 전기화학적 특성 개선
Improved Cycling Ability of Si-SiO2-graphite Composite Battery Anode by Interfacial Stabilization
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Si계 음극소재는 리튬 삽입-탈착 중 일어나는 큰 구조적 부피변화와 입도변화로 인해 빠른 성능 퇴화가 일어나는 단점이 있다. 산화물 SiO 음극소재는 리튬과의 반응 중 비활성상인 Li2O 및 lithium silicate가 형성되어 Si의 부피변화를 완화시키는 버퍼 역할을 하므로 용량은 Si보다 적으나 개선된 용량 유지 특성을 보이는 것으로 알려져 있다. 본 연구에서는 Si의 부피변화 완화를 위하여 저가의 SiO2와 입자간 전기전도성을 향상시키는 흑연을 구조안정화 기재로서 사용하여 Si-SiO2-흑연 복합재 음극을 제작하였다. 구조안정화 뿐만 아니라 silane계 전해액 첨가제를 이용하여 Si-SiO2-흑연 복합재 음극과 전해액간 계면을 안정화시킴으로써 용량 유지 특성이 개선되는 효과에 대해 보고하고자 한다.
Abstract
Structural volume change occurring on the Si-based anode battery materials during alloying/dealloying with lithium is noticed to be a major drawback responsible for a limited cycle life. Silicon monoxide has been reported to show relatively improved cycling performance compared to Si-containing materials for rechargeable lithium batteries, due to the structural buffering role of in-situ formed Li2O and lithium silicate during the reaction of silicon monoxide and lithium. Here we report improved cycling ability of interfacially stabilized Si-SiO2-graphite composite anode using silane-based electrolyte additive for rechargeable lithium batteries, which includes low cost silicon dioxide for structural stabilization and graphite for enhanced conductivity.
참고문헌 (23)
- U. Kasavajjula, "Nanoand bulk-silicon-based insertion anodes for lithium-ion secondary cells", J. Power Sources, 163, pp.1003~ (2007)
- X. Wang, "A novel nanosized silicon-based composite as anode material for high performance lithium ion batteries", Electrochim. Acta, 56, pp.1512~ (2011)
- C. H. Doh, "A new composite anode, Fe-Cu-Si", C for lithium ion battery, 2008, pp.461(12), 321~325[DOI]
- M. S. Park, "Si-Ni alloy-graphite composite synthesized by arc-melting and high-energy mechanical milling for use as an anode in lithium-ion batteries", J. Power Sources, 158, pp.650~ (2006)
- N. Jayaprakash, "A new class of tailor-made Fe0.92Mn0.08Si2 lithium battery anodes: Effect of composite and carbon coated Fe0.92Mn0.08Si2 anodes", Intermetallics, 15, pp.442~ (2007)
- M. Miyachi, "Analysis of SiO anodes for lithium-ion batteries", J. Electrochem. Soc, 152, pp.A2089~ (2005)
- S.-W. Song, "Silane-derived SEI stabilization on thin-film electrodes of nanocrystalline Si for lithium batteries", Electrochem. Solid-State Lett, 12, pp.A23~ (2009)
- Y.-G. Ryu, "Electrochemical behaviors of silicon electrode in lithium salt solution containing alkoxy silane additives", Journal of the Electrochemical Society, 155(8), pp.583~589 (2008), Electrochemical Society, Inc.
- C. C. Nguyen, "Interfacial structural stabilization on amorphous silicon anode for improved cycling performance in lithium-ion batteries", Electrochim. Acta, 55, pp.3026~ (2010)
- Z. Q. Li, "Xray diffraction patterns of graphite and turbostratic carbon", Carbon, 45, pp.1686~ (2007)
- D. Han, "Raman study of thin films of amorphous-tomicrocrystalline silicon prepared by hot-wire chemical vapor deposition", J. Appl. Phys, 94, pp.2930~ (2003)
- F. Tuinstra, "Raman Spectrum of graphite", J. Chem. Phys., 53, pp.1126~ (1970)
- D. E. Arreaga-Salas, "Progression of Solid Electrolyte Interphase Formation on Hydrogenated Amorphous Silicon Anodes for Lithium-Ion Batteries", J. Phys. Chem C, 116, pp.9072~ (2012)
- B. Guo, "Electrochemical reduction of nano-SiO2 in hard carbon as anode material for lithium ion batteries", Electrochem. Comm, 10, pp.1876~ (2008)
- N. B. Colthup, "Introduction to Infrared and Raman Spectroscopy" (1990), Academic Press
- Hyun Choi, "Control of Surface Chemistry and Electrochemical Performance of Carbon-coated Silicon Anode Using Silane-based Self-Assembly for Rechargeable Lithium Batteries", Bulletin of the Korean Chemical Society, 31(9), pp.2519~2526 (2010), 대한화학회
- G. V. Zhuang, "Analysis of the chemical composition of the passive film on Li-ion battery anodes Using attentuated total reflection infrared spectroscopy", Electrochem. Solid State Lett, 6, pp.A136~ (2003)
- G. V. Zhuang, "Lithium methyl carbonate as a reaction product of metallic lithium and dimethyl carbonate", Electrochem. Solid-State Lett, 9, pp.A64~ (2006)
- D. Aurbach, "Identification of surface films formed on lithium inpropylene carbonate solutions", J. Electrochem. Soc, 134, pp.1611~ (1987)
- H. Yang, "Thermal stability of LiPF6 salt and Li-ion battery electrolytes containing LiPF6", J. Power Sources, 161, pp.573~ (2006)
- N. S. Zhai, "The application of the EIS in Li-ion batteries measurement", J. Physics, 48, pp.1157~ (2006)
- T. Piao, "Intercalation of lithium Ions into graphite electrodesstudied by AC impedance measurements", J. Electrochem.Soc, 146, pp.2794~ (1999)
- J. Guo, "Cyclability study of silicon-carbon composite anodes forlithium-ion batteries using electrochemical impedancespectroscopy", Electrochim. Acta, 56, pp.3981~ (2011)