Interfacial structural stabilization on amorphous silicon anode for improved cycling performance in lithium-ion batteries

Nguyen, Cao Cuong; Song, Seung‐Wan

doi:10.1016/j.electacta.2009.12.067

Cited by 113 publications

(79 citation statements)

References 39 publications

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“…An enabler for good adhesion between the expanding and contracting Li-Si [21][22][23][24][25][26][27] active material (and alloys of Li-Si-Sn 28 ) and the copper current collector is the roughened surface of the copper. In a related vein, Kim et al 29 found that the cycle performance of the silicon-graphite composite electrodes that were slurry-coated onto Cu foils was enhanced when a nodule-type copper foil was employed, similar to the morphology depicted in Figure 1.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

Fabrication and Characterization of Lithium-Silicon Thick-Film Electrodes for High-Energy-Density Batteries

Xiao

Balogh

Raghunathan

et al. 2016

J. Electrochem. Soc.

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We have developed a method to operate lithium-silicon (Li-Si) thick-film electrodes in a manner consistent with traction applications. Key to the operating strategy is the voltage control of the electrode. It is expected that strong reducing environments, created by operating the electrode at low potentials (near that of Li), reduce battery life. We show that operating Li-Si at higher potentials is also damaging, and this is counterintuitive in that common negative electrodes (e.g., graphites and titanates) do not suffer from this limitation. Arguments based on measured Coulombic efficiencies, cycle life tests, in-situ stress measurements, and high-resolution microscopy resolve the otherwise anomalous findings. We show that promising half-cell ( Silicon film electrodes have been shown to be useful for characterization purposes insofar as one need not treat binders, various particle geometries, conductive diluents, and other complications inherent in the construction of porous electrodes. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] In this work, we focus on the potential utility of Si thick-film electrodes formed on roughened copper current collectors. If sufficient capacity can be obtained, such a geometry might simplify electrode fabrication, as the electrode host material would consist of nothing more than Si deposited on a current collector, and high specific energies (Wh/L) and energy densities (Wh/kg) could result.Four topics are examined in this endeavor. First, by controlling the potential limits over which we operate a Li-Si electrode, can we obtain sufficient stability for relatively thick-film electrodes (i.e., yielding more than 2 mAh/cm 2 )? Second, how does the electrochemical performance correlate with stress in the electrode over the potential window of operation? Third, because the electrode consists of only Li and Si, we can isolate equilibrium hysteresis behavior associated with this alloy, and we derive and implement a simple model to represent the voltage-composition data that may be useful in subsequent engineering analyses of electrodes with a significant Li-Si contribution. Last, we examine full cells (Li-Si vs. an NMC622 positive electrode, corresponding to Ni 0.6 Mn 0.2 Co 0.2 O 2 ) in the context of capacity, cycle life, cycle efficiency, microstructure, and elemental analysis. A cell modeling tool 45 is used to examine the efficacy of the Si film electrodes for actual battery electric vehicle applications based on specific energy and energy density calculations.

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Section: Discussion Of Resultsmentioning

confidence: 99%

Fabrication and Characterization of Lithium-Silicon Thick-Film Electrodes for High-Energy-Density Batteries

Xiao

Balogh

Raghunathan

et al. 2016

J. Electrochem. Soc.

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“…Numerous papers report that the SEI layer formed onto graphite-type negative electrode in carbonate solvent containing lithium salts is mainly constituted of lithium alkyl carbonates, lithium carbonate and lithium inorganic salts [18]. However, very few papers refer to the formation of Si Si Si the SEI layer on silicon electrodes [11,[19][20][21][22][23][24][25], because it was first believed that no SEI layer was formed [26]. Extensive study of cyclability of pure Si electrodes [10][11][12]27] was an incentive to study and to understand the formation of the SEI layer during the first cycle of charge/discharge on silicon nanowires (SiNW) and hydrogenated amorphous silicon (a-Si:H) electrodes.…”

Section: Introductionmentioning

confidence: 99%

Interphase chemistry of Si electrodes used as anodes in Li-ion batteries

Pereira-Nabais

Światowska

Chagnes

et al. 2013

Applied Surface Science

145

178

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a b s t r a c tThe effect of the Si electrode morphology (amorphous hydrogenated silicon thin films -a-Si:H as a model electrode and Si nanowires -SiNWs electrode) on the interphase chemistry was thoroughly investigated by the surface science techniques: X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS). XPS analysis shows a strong attenuation and positive shift of the Si 2p peaks after a complete charge/discharge performed in PC-and EC:DMC-based electrolytes for both electrodes (a-Si:H and SiNW), confirming a formation of a passive film (called solid electrolyte interphase -SEI layer). As evidenced from the XPS analysis performed on the model electrode, the thicker SEI layer was formed after cycling in PC-based electrolyte as compared to EC:DMC electrolyte. XPS and ToF-SIMS investigations reveal the presence of organic carbonate species on the outer surface and inorganic salt decomposition species in the inner part of the SEI layer. Significant modification of the surface morphology for the both electrodes and a full surface coverage by the SEI layer was confirmed by the scanning electron microscopy (SEM) analysis.

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“…Film electrode homogeneously deposited on a conductive substrate can have a robust structure and strong adherence to the substrate, yielding a good model system for the study of lithium diffusion kinetics during electrochemical charge and discharge cycling. Our earlier work showed that interfacial stabilization of pulsed laser deposited (PLD) Si film model electrodes on Cu substrate by constructing the surface protective siloxane network at the electrode surface using silane additive provides the lithium diffusivity in the order of 10 -13 cm 2 s -1 [19,22]. There is no prior record of lithium diffusivity study for Sn-based film model electrodes prepared by PLD.…”

Section: Introductionmentioning

confidence: 99%

“…Studies of dense film model electrode can give a clearer insight into the intrinsic properties of electrode material without complications from carbon and polymeric binder additives that are necessary in bulk electrodes for enhanced electric conductivity and particle connection [3][4][5][17][18][19][20][21][22][23]. Film electrode homogeneously deposited on a conductive substrate can have a robust structure and strong adherence to the substrate, yielding a good model system for the study of lithium diffusion kinetics during electrochemical charge and discharge cycling.…”

Section: Introductionmentioning

confidence: 99%

Lithium Diffusivity of Tin-based Film Model Electrodes for Lithium-ion Batteries

Hong¹,

Jo²,

Song³

2015

Journal of Electrochemical Science and Technology

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Lithium diffusivity of fluorine-free and -doped tin-nickel (Sn-Ni) film model electrodes with improved interfacial (solid electrolyte interphase (SEI)) stability has been determined, utilizing variable rate cyclic voltammetry (CV). The method for interfacial stabilization comprises fluorine-doping on the electrode together with the use of electrolyte including fluorinated ethylene carbonate (FEC) solvent and trimethyl phosphite additive. It is found that lithium diffusivity of Sn is largely dependent on the fluorine-doping on the Sn-Ni electrode and interfacial stability. Lithium diffusivity of fluorinedoped electrode is one order higher than that of fluorine-free electrode, which is ascribed to the enhanced electrical conductivity and interfacial stabilization effect.

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Interfacial structural stabilization on amorphous silicon anode for improved cycling performance in lithium-ion batteries

Cited by 113 publications

References 39 publications

Fabrication and Characterization of Lithium-Silicon Thick-Film Electrodes for High-Energy-Density Batteries

Fabrication and Characterization of Lithium-Silicon Thick-Film Electrodes for High-Energy-Density Batteries

Interphase chemistry of Si electrodes used as anodes in Li-ion batteries

Lithium Diffusivity of Tin-based Film Model Electrodes for Lithium-ion Batteries

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