Surface chemistry and morphology of the solid electrolyte interphase on silicon nanowire lithium-ion battery anodes

Chan, Candace K.; Ruffο, Riccardo; Hong, Seung Sae; Cui, Yi

doi:10.1016/j.jpowsour.2009.01.007

Cited by 583 publications

(551 citation statements)

References 23 publications

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“…The spectrum of C1s revealed that the amorphous carbon from CTP represent the three possible bonds of graphite (C, ~284.4 eV), hydrocarbon(C-C, ~285.5 eV) and C=O (~287.5 eV), respectively [37].…”

Section: Resultsmentioning

confidence: 99%

Nanocomposites of silicon and carbon derived from coal tar pitch: Cheap anode materials for lithium-ion batteries with long cycle life and enhanced capacity

Wang

Chou

Kim

et al. 2013

Electrochimica Acta

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Dou, S. Xue. (2013). Nanocomposites of silicon and carbon derived from coal tar pitch: Cheap anode materials for lithium-ion batteries with long cycle life and enhanced capacity. Electrochimica Acta, 93 (March), 213-221.Nanocomposites of silicon and carbon derived from coal tar pitch: Cheap anode materials for lithium-ion batteries with long cycle life and enhanced capacity AbstractFrom energy and environmental consideration, an industrial waste product, coal tar pitch (CTP), is used as the carbon source for Si/AC composite. We exploited a facile sintering method to largely scale up Si/ amorphous carbon nanocomposite. The composites with 20 wt.% silicon with PVdF binder exhibited stable lithium storage ability for prolonged cycling. The composite anode delivered a capacity of 400.3 mAh g−1 with a high capacity retention of 71.3% after 1000 cycles. Various methods are used to investigate the reason for the outstanding cyclability. The results indicate that the silicon nanoparticles are wrapped by amorphous SiOx and AC in Si/AC composite. This uniform structure is very favorable to lithium storage, the SiOx and AC layers can supply sufficient conductivity and strong elasticity to suppress the stress resulting from the reaction of Si with Li during charge/discharge process.

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Section: Resultsmentioning

confidence: 99%

Nanocomposites of silicon and carbon derived from coal tar pitch: Cheap anode materials for lithium-ion batteries with long cycle life and enhanced capacity

Wang

Chou

Kim

et al. 2013

Electrochimica Acta

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“…Si anodes suffer extensively from a dynamic SEI that must reform each cycle as expansion during lithiation causes the layer to break 9,11 . Formation of the SEI consumes Li þ and depletes electrolyte during every cycle 27 . In contrast to half-cells, which utilize a Li metal counter electrode with an effectively unlimited supply of Li þ , full-cells have a limited supply of Li þ provided by the cathode.…”

mentioning

confidence: 99%

Stable silicon-ionic liquid interface for next-generation lithium-ion batteries

et al. 2015

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We are currently in the midst of a race to discover and develop new battery materials capable of providing high energy-density at low cost. By combining a high-performance Si electrode architecture with a room temperature ionic liquid electrolyte, here we demonstrate a highly energy-dense lithium-ion cell with an impressively long cycling life, maintaining over 75% capacity after 500 cycles. Such high performance is enabled by a stable half-cell coulombic efficiency of 99.97%, averaged over the first 200 cycles. Equally as significant, our detailed characterization elucidates the previously convoluted mechanisms of the solid-electrolyte interphase on Si electrodes. We provide a theoretical simulation to model the interface and microstructural-compositional analyses that confirm our theoretical predictions and allow us to visualize the precise location and constitution of various interfacial components. This work provides new science related to the interfacial stability of Si-based materials while granting positive exposure to ionic liquid electrochemistry.

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“…Li salts on the Si surface were similar to those on the graphite surface. This phenomenon was observed using X-ray photoelectron spectroscopy (XPS) [24]. The morphology of the SEI on the Si substrate was also observed with scanning electron microscopy (SEM) [29,30].…”

Section: Methods Observationmentioning

confidence: 98%

“…The silicon (Si) electrode, as a research focus of the Li-ion batteries, has a higher capacity than the graphite anode. However, few investigations focused on the forming mechanism and electrochemical properties of the SEI on the Si electrode surface whose research is still at the qualitative stage [24,25]. It was deemed no SEI formed on the Si surface in early studies.…”

Section: Methods Observationmentioning

confidence: 99%

Estimating the thickness of diffusive solid electrolyte interface

Wang

Shen

Huang

et al. 2017

Sci. China Phys. Mech. Astron.

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The solid electrolyte interface (SEI) is a hierarchical structure formed in the transition zone between the electrode and the electrolyte. The properties of lithium-ion (Li-ion) battery, such as cycle life, irreversible capacity loss, self-discharge rate, electrode corrosion and safety are usually ascribed to the quality of the SEI, which are highly dependent on the thickness. Thus, understanding the formation mechanism and the SEI thickness is of prime interest. First, we apply dimensional analysis to obtain an explicit relation between the thickness and the number density in this study. Then the SEI thickness in the initial charge-discharge cycle is analyzed and estimated for the first time using the Cahn-Hilliard phase-field model. In addition, the SEI thickness by molecular dynamics simulation validates the theoretical results. It has been shown that the established model and the simulation in this paper estimate the SEI thickness concisely within order-of-magnitude of nanometers. Our results may help in evaluating the performance of SEI and assist the future design of Li-ion battery. 82.47.Aa, 68.35.Md, 02.70.Ns lithium-ion battery, solid electrolyte interface, diffusion model, thickness estimation PACS number(s):

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Surface chemistry and morphology of the solid electrolyte interphase on silicon nanowire lithium-ion battery anodes

Cited by 583 publications

References 23 publications

Nanocomposites of silicon and carbon derived from coal tar pitch: Cheap anode materials for lithium-ion batteries with long cycle life and enhanced capacity

Nanocomposites of silicon and carbon derived from coal tar pitch: Cheap anode materials for lithium-ion batteries with long cycle life and enhanced capacity

Stable silicon-ionic liquid interface for next-generation lithium-ion batteries

Estimating the thickness of diffusive solid electrolyte interface

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