Enhanced cycling performance of binder free silicon-based anode by application of electrochemically formed microporous substrate

Link, Steffen; Kurniawan, Mario; Dimitrova, A.; Krischok, Stefan; Bund, Andreas; Ivanov, Svetlozar

doi:10.1016/j.electacta.2021.138216

Cited by 5 publications

(12 citation statements)

References 43 publications

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“…The lithiation performance of identically deposited Si–O–C composite layers has been studied in our previous work. [ 20 ] In contrast to the sodiation, in Li‐ion electrolyte, the material displayed much higher reversible capacity (850 mAh g −1 after 250 cycles) and reversible redox activity in the characteristic for Si potential range. The observed differences in the capacities in both electrolytes conform with the contrast in the ionic radii of Li and Na, and this effect is supported by other studies.…”

Section: Resultsmentioning

confidence: 99%

“…In our earlier works, we have observed comparable stabilization effect of the Si–O–C layers, triggered by incorporation of contaminants, in Li‐ion electrolytes. [ 19,20 ]…”

Section: Resultsmentioning

confidence: 99%

“…The Si–O–C material electrodeposited from SL displays an enhanced electrochemical–mechanical stability upon lithiation, which can be ascribed to effects of the chemical composition. [ 20,21 ]…”

Section: Introductionmentioning

confidence: 99%

“…[17] Along with other effective methods, silicon-containing materials have been deposited also electrochemically, at room temperature, in different organic-based electrolytes. [18][19][20][21][22][23] The analysis of their chemical composition showed that apart from elemental silicon, depending on the electrolyte type, the deposits typically contain considerable amounts of additional components, originating from the decomposition of the corresponding solvent and supporting electrolyte salt. [20][21][22][23] According to the authors' knowledge, the sodiation behavior of this type of silicon-containing composite materials has not been explored so far.…”

mentioning

confidence: 99%

“…In our previous works, we found that due to the integrated extra components, the viscoelasticity of the electrodeposited Si-based layer is substantially increased. [20][21][22] This effect plays a positive role for achieving an improved cycling stability of the deposits in electrolytes for LIBs. [19,20] Related to the advanced application of the Si-O-C material, our particular attention has been focused on the sulfolane (SL)-based electrolytes as electrochemically stable, low-cost, and environmentally friendly alternative to the conventional organic solvent-based ones.…”

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confidence: 99%

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Reversible Sodiation of Electrochemically Deposited Binder‐ and Conducting Additive‐Free Si–O–C Composite Layers

et al. 2022

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Binder‐ and conducting additive‐free Si–O–C composite layers are deposited electrochemically under potentiostatic conditions from sulfolane‐based organic electrolyte. Quartz crystal microbalance with damping monitoring is used for evaluation of the layer growth and its physical properties. The sodiation–desodiation performance of the material is afterward explored in Na‐ion electrolyte. In terms of specific capacity, rate capability, and long‐term electrochemical stability, the experiments confirm the advantages of applying the electrochemically formed Si–O–C structure as anode for Na‐ion batteries. The material displays high (722 mAh g−1) initial reversible capacity at j = 70 mA g−1 and preserves stable long‐term capacity of 540 mAh g−1 for at least 400 galvanostatic cycles, measured at j = 150 mA g−1. The observed high performance can be attributed to its improved mechanical stability and accelerated Na‐ion transport in the porous anode structure. The origin of the material electroactivity is revealed based on X‐Ray photoelectron spectroscopic analysis of pristine (as deposited), sodiated, and desodiated Si–O–C layers. The evaluation of the spectroscopic data indicates reversible activity of the material due to the complex contribution of carbon and silicon redox centers.

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Section: Resultsmentioning

confidence: 99%

“…In our earlier works, we have observed comparable stabilization effect of the Si–O–C layers, triggered by incorporation of contaminants, in Li‐ion electrolytes. [ 19,20 ]…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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confidence: 99%

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Reversible Sodiation of Electrochemically Deposited Binder‐ and Conducting Additive‐Free Si–O–C Composite Layers

et al. 2022

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Dry Pre‐Lithiation for Graphite‐Silicon Diffusion‐Dependent Electrode for All‐Solid‐State Battery

Lee

Jin

Kim

et al. 2023

Advanced Energy Materials

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The graphite/silicon-based diffusion-dependent electrodes (DDEs) are one of the promising electrode designs to realize high energy density for all-solid-state batteries (ASSBs) beyond conventional composite electrode design. However, the graphite/silicon-based electrode also suffers from large initial irreversible capacity loss and capacity fade caused by significant volume change during cycling, which offsets the advantages of the DDEs in ful-cell configuration. Herein, a new concept is presented for DDEs, dry pre-lithiated DDEs (PL-DDEs) by introducing Li metal powder. Since Li metal powder provides Li ions to graphite and silicon even in a dry state, the lithiation states of active materials is increased. Moreover, the residual Li within PL-DDE further serves as an activator and a reservoir for promoting the lithiation reaction of the active materials and compensating for the active Li loss upon cycling, respectively. Based on these merits, ASSBs with PL-DDE exhibit excellent cycling performance with higher columbic efficiency (85.2% retention with 99.6% CE at the 200th cycle) compared to bare DDE. Therefore, this dry lithiation process must be a simple but effective design concept for DDEs for high-energy-density ASSBs.

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Silicon Anodes for Lithium‐Ion Batteries Based on a New Polyimide Binder

Lusztig,

Luski,

Shpigel

et al. 2024

Batteries & Supercaps

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Silicon is a promising candidate for replacing graphite in anodes for advanced Li‐ion batteries due to its high theoretical gravimetric energy density. However, silicon as an active anode material suffers from significant volume changes upon lithiation/delithiation, causing fast capacity fading. The performance of silicon anodes depends on the polymeric binders used, which form well‐bound Si particles matrices that accommodate the strains developed during their repeated lithiation, thus maintaining their integrity. Herein, we investigated the effect of thermal treatment on the performance of polyimide P84 as a novel binder for composite Si anodes comprising metallurgical micron‐size silicon particles (80% silicon). The electrochemical behavior of metallurgical silicon‐based anodes heat‐treated to 120°C, 200°C, 300°C, and 400°C was examined in half (vs. Li electrodes) and full (vs. NCM622 cathodes) cells. An optimal performance was obtained after heat treatment at 400°C, related to the very good adhesion of the electrode’s active mass to the current collector, and the ability of the heat‐treated binder to enhance the active mass integrity upon cycling. A comparison between optimized anodes developed herein to other Si anodes containing frequently used binders like Sodium Alginate (SA) and Lithium Polyacrylate (LiPAA), demonstrated clear advantages of the heat‐treated Si anodes containing P84.

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Enhanced cycling performance of binder free silicon-based anode by application of electrochemically formed microporous substrate

Cited by 5 publications

References 43 publications

Reversible Sodiation of Electrochemically Deposited Binder‐ and Conducting Additive‐Free Si–O–C Composite Layers

Reversible Sodiation of Electrochemically Deposited Binder‐ and Conducting Additive‐Free Si–O–C Composite Layers

Dry Pre‐Lithiation for Graphite‐Silicon Diffusion‐Dependent Electrode for All‐Solid‐State Battery

Silicon Anodes for Lithium‐Ion Batteries Based on a New Polyimide Binder

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