Customizing Active Materials and Polymeric Binders: Stern Requirements to Realize Silicon-Graphite Anode Based Lithium-Ion Batteries.

Hamzelui, Niloofar; Eshetu, Gebrekidan Gebresilassie; Figgemeier, Egbert

doi:10.1016/j.est.2020.102098

Cited by 31 publications

(24 citation statements)

References 37 publications

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“…To mitigate the challenges linked to pure Si, coupling Si and Gr has been hailed as the most effective strategy towards the commercialisation of Si anode-based highenergy LIBs [17][18][19] . Adding Gr to Si materials buffers the volume change of the overall composite electrode (not individual Si particles) at a relatively low Si content (~20% Si) because the major portion of the reactive sites for SEI formation is provided by the graphite particles 20 . The addition of Gr to Si also increases the diffusivity (δ e− and D Li + ) of the electrode and improves its processability in terms of electrode manufacturing (e.g.…”

Section: Cell Chemistrymentioning

confidence: 99%

“…To date, battery manufacturers have introduced small amounts of Si (<6–8 wt.%), yet incorporating up to 50–60 wt.% Si remains a serious obstacle due to large volume change-induced SEI failure, accelerated electrolyte decomposition and drying out 14 . The use of a high Si content can only be realised by the synergistic optimisation of various parameters, including polymeric binders compatible with Gr and Si chemistries, functional additives, pre-lithiation, surface functionalisation, protective coatings, etc 20 . The individual materials (i.e.…”

Section: Cell Chemistrymentioning

confidence: 99%

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Production of high-energy Li-ion batteries comprising silicon-containing anodes and insertion-type cathodes

et al. 2021

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Rechargeable Li-based battery technologies utilising silicon, silicon-based, and Si-derivative anodes coupled with high-capacity/high-voltage insertion-type cathodes have reaped significant interest from both academic and industrial sectors. This stems from their practically achievable energy density, offering a new avenue towards the mass-market adoption of electric vehicles and renewable energy sources. Nevertheless, such high-energy systems are limited by their complex chemistry and intrinsic drawbacks. From this perspective, we present the progress, current status, prevailing challenges and mitigating strategies of Li-based battery systems comprising silicon-containing anodes and insertion-type cathodes. This is accompanied by an assessment of their potential to meet the targets for evolving volume- and weight-sensitive applications such as electro-mobility.

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Section: Cell Chemistrymentioning

confidence: 99%

Section: Cell Chemistrymentioning

confidence: 99%

Production of high-energy Li-ion batteries comprising silicon-containing anodes and insertion-type cathodes

et al. 2021

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“…The optimized formulation of the anode and slurry preparation steps is described in our previous report. 19 LiPAA and CMC are selected as binders for the Si/Gr blend electrode because of their peculiar features including a high amount of carboxyl groups, no or little swelling while in contact with the electrolyte, high stiffness, and moderate elastomeric properties that can overcome both elastic and plastic deformation during Si volume change. Due to the difference in the chemistry of Si and Gr particles, both binders, which have different affinities to the Si and Gr active materials, are deployed.…”

Section: Methodsmentioning

confidence: 99%

“…However, despite all the significant features, Si-based anodes present a massive volume change (≥280%) upon lithiation/delithiation, leading to mechanical stress to the anode film, resulting in the pulverization of the Si particles, lower electrical conductivity, an unstable solid–electrolyte interphase (SEI), and lower CCE) than that of graphite. 19 , 20 To alleviate the challenges associated with both Si and Gr chemistries, the co-utilization of Si and Gr with designer polymeric binders and electrolyte systems via forming a blend or a composite is a rational way as it presents a synergistic advantageous effect of both components. 19 , 21 − 24 …”

Section: Introductionmentioning

confidence: 99%

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Toward the Integration of a Silicon/Graphite Anode-Based Lithium-Ion Battery in Photovoltaic Charging Battery Systems

et al. 2022

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Solar photovoltaic (PV) energy generation is highly dependent on weather conditions and only applicable when the sun is shining during the daytime, leading to a mismatch between demand and supply. Merging PVs with battery storage is the straightforward route to counteract the intermittent nature of solar generation. Capacity (or energy density), overall efficiency, and stability at elevated temperatures are among key battery performance metrics for an integrated PV–battery system. The performance of high-capacity silicon (Si)/graphite (Gr) anode and LiNi 0.6 Mn 0.2 Co 0.2 O 2 (NMC622) cathode cells at room temperature, 45, and 60 °C working temperatures for PV modules are explored. The electrochemical performance of both half and full cells are tested using a specially formulated electrolyte, 1 M LiPF 6 in ethylene carbonate: diethyl carbonate, with 5 wt % fluoroethylene carbonate, 2 wt % vinylene carbonate, and 1 wt % (2-cyanoethyl)triethoxysilane. To demonstrate solar charging, perovskite solar cells (PSCs) are coupled to the developed batteries, following the evaluation of each device. An overall efficiency of 8.74% under standard PV test conditions is obtained for the PSC charged lithium-ion battery via the direct-current–direct-current converter, showing the promising applicability of silicon/graphite-based anodes in the PV–battery integrated system.

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Prelithiated Carbon Nanotube‐Embedded Silicon‐based Negative Electrodes for High‐Energy Density Lithium‐Ion Batteries

Ünal,

Maccio‐Figgemeier,

Haneke

et al. 2024

Adv Materials Inter

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Multi‐walled carbon Nanotubes (MWCNTs) are hailed as beneficial conductive agents in Silicon (Si)‐based negative electrodes due to their unique features enlisting high electronic conductivity and the ability to offer additional space for accommodating the massive volume expansion of Si during (de‐)lithiation. However, both MWCNTs and Siirreversibly consume an enormous amount of Li inventory to principally form a Solid Electrolyte Interphase (SEI) and due to other parasitic reactions, which results in lowering the Coulombic Efficiency (CE), rapid decrease in reversible capacity, and shorter battery life.To tackle these hurdles, electrochemical prelithiation is adopted as a taming strategy to mitigate the large capacity loss (nearly reducing the first irreversible capacity by ≈60%) of MWCNT‐Si/Graphite (Gr) negative electrode‐based full‐cells. In contrast, a yardstick negative electrode utilizing commercially used Super P (Super P‐Si/Gr) showed a reduction of ≈47% after in vitro pre‐doping with lithium, which is considerably smaller compared to that of MWCNTs‐based electrode design. Furthermore, the Initial CE, life cycle, and rate capability are enhanced by prelithiation. Interestingly, prelithiation brings more impact on MWCNTs ‐Si/Gr than with Super P‐Si/Gr design. An in‐depth analysis using X‐ray photoelectron spectroscopy (XPS), RAMAN Spectroscopy, Attenuated Total Reflection Fourier Transform Infrared Spectroscopy (ATR FTIR), laser microscopy, and Scanning Electron Microscopy (SEM) reveal deeper insights into the differences in SEI layer between prelithiated MWCNTs and their Super P‐based electrode counterparts.

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Customizing Active Materials and Polymeric Binders: Stern Requirements to Realize Silicon-Graphite Anode Based Lithium-Ion Batteries.

Cited by 31 publications

References 37 publications

Production of high-energy Li-ion batteries comprising silicon-containing anodes and insertion-type cathodes

Production of high-energy Li-ion batteries comprising silicon-containing anodes and insertion-type cathodes

Toward the Integration of a Silicon/Graphite Anode-Based Lithium-Ion Battery in Photovoltaic Charging Battery Systems

Prelithiated Carbon Nanotube‐Embedded Silicon‐based Negative Electrodes for High‐Energy Density Lithium‐Ion Batteries

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