Thermolytically grafted silicon particles with ultrathin carbonaceous coating rich of phenyl moieties as lithium-storage anode material

Tran, Minh Xuan; Woo, JongRoul; Nguyen, Thuy-An; Lee, Sang−Wha; Lee, Joong Kee

doi:10.1016/j.cej.2020.125169

Cited by 21 publications

(9 citation statements)

References 65 publications

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“…The diffusion coefficient of lithium ion can be determined by the Randles–Sevcik equation:

where i P is peak current (A), m is the mass of active materials-NMC811 (g), A is the effective area of the electrode (cm 2 ), F is the Faraday constant (96,485 s A mol −1 ), R is the gas constant (8.314 J K −1 mol −1 ), T is the absolute temperature (K), C is the initial concentration of lithium ion (1.0 mol cm −3 ), D Li+ is the chemical diffusion coefficient of Li + (cm 2 s −1 ), and ν is the scan rate in mV s −1 [ 22 ].…”

Section: Methodsmentioning

confidence: 99%

Ultrafast-Laser Micro-Structuring of LiNi0.8Mn0.1Co0.1O2 Cathode for High-Rate Capability of Three-Dimensional Li-ion Batteries

Tran

Smyrek

Park³

et al. 2022

Nanomaterials

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Femtosecond ultrafast-laser micro-patterning was employed to prepare a three-dimensional (3D) structure for the tape-casting Ni-rich LiNi0.8Mn0.1Co0.1O2 (NMC811) cathode. The influences of laser structuring on the electrochemical performance of NMC811 were investigated. The 3D-NMC811 cathode retained capacities of 77.8% at 2 C of initial capacity at 0.1 C, which was thrice that of 2D-NMC811 with an initial capacity of 27.8%. Cyclic voltammetry (CV) and impedance spectroscopy demonstrated that the 3D electrode improved the Li+ ion transportation at the electrode–electrolyte interface, resulting in a higher rate capability. The diffusivity coefficient DLi+, calculated by both CV and electrochemical impedance spectroscopy, revealed that 3D-NMC811 delivered faster Li+ ion transportation with higher DLi+ than that of 2D-NMC811. The laser ablation of the active material also led to a lower charge–transfer resistance, which represented lower polarization and improved Li+ ion diffusivity.

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“…The diffusion coefficient of lithium ion can be determined by the Randles–Sevcik equation:

Section: Methodsmentioning

confidence: 99%

Ultrafast-Laser Micro-Structuring of LiNi0.8Mn0.1Co0.1O2 Cathode for High-Rate Capability of Three-Dimensional Li-ion Batteries

Tran

Smyrek

Park³

et al. 2022

Nanomaterials

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“…Also, there were no apparent peaks of residual Ag in the XRD patterns of the m-PSi and m-GPSi samples. 32 Figure S1b shows the Fourier transform infrared (FTIR) spectra of the prepared samples, confirming the successful grafting of amorphous carbonaceous materials containing phenolic moieties onto m-PSi. The FTIR spectrum of m-PSi features a Si−O−Si stretching band at 1050 cm −1 , suggesting the incidental formation of adventitious silicon oxide in m-PSi during its storage in an atmospheric environment.…”

Section: Postmortem Sei Layer Analysis By Atr-ftirmentioning

confidence: 57%

“…To fortify the physicochemical integrity of Si-based anodes, it is essential to introduce durable covalent bonds between the C matrices and the Si interface. Among the various C matrices explored, phenolic carbon stands out because of its ability to store significant Li + ions per unit mass, resulting in high specific capacities and commendable rate capabilities. − …”

Section: Introductionmentioning

confidence: 99%

Enhanced Lithium Storage in Micro-Si-Based Anode Materials through Low-Temperature Interface Engineering with an Ultrathin Phenolic Interlayer

Naikwade,

Lee,

Salunkhe

et al. 2024

ACS Appl. Energy Mater.

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Silicon (Si) anode materials show tremendous potential for high-energy Li-ion batteries (LIBs) due to their excellent theoretical capacity. However, critical issues like initial capacity loss, unstable solid electrolyte interface (SEI) formation, and volume changes during cycling have hindered their practical application. To address these challenges, we have developed a resilient Si interface for rapid Li + ion transport while maintaining Si structural integrity. Herein, we utilized microsized porous silicon (m-PSi) coated with an ultrathin phenolic interlayer from lowtemperature thermolysis of poly(4-vinylphenol) (PVP). This PVPderived phenolic carbon is covalently linked to the Si surface, creating a strong Si interface and a pathway for Li + ion transport. The grafted m-PSi (m-GPSi) anode shows an impressive initial capacity of 3134 mA h g −1 with a capacity retention of 80.0% after 100 cycles at 0.1 A g −1 . Moreover, it demonstrated a superior rate performance of 1270 mA h g −1 at 4 A g −1 with a recovery rate of 96% at 0.1 A g −1 . These results surpass state-of-the-art microsized Si anodes, primarily due to the covalently interfaced ultrathin phenolic interlayer, consequently enhancing Li + ion conductivity, mechanical strength, and stable SEI formation during the LIB operation. This research offers a convenient interface engineering strategy to enhance the Si anode performance for next-generation LIBs.

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“…More recently, Tran et al. showed the possibilities of using an organic coating as a way to make Si microparticles relevant [66] . In their research, they first produced their own porous silicon, porous‐Si, by chemically etching a commercial Si micro powder (around 5 μm) assisted with silver.…”

Section: Organic Coatingsmentioning

confidence: 99%

Engineering of Silicon Core‐Shell Structures for Li‐ion Anodes

Rage

Delbègue

Louvain

et al. 2021

Chemistry A European J

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The amount of silicon in anode materials for Li‐ion batteries is still limited by the huge volume changes during charge‐discharge cycles. Such changes lead to the loss of electrical contacts, as well as mechanical and surface electrolyte interphase (SEI) instabilities, strongly reducing the cycle life. Core‐shell structures have attracted a vast research interest due to the possibility of modifying some properties with a judicious choice of the shell. It is, for example, possible to improve the electronic conductivity and ionic diffusion, or buffer volume variations. This review gives a comprehensive overview of the recent developments and the different strategies used for the design, synthesis and electrochemical performance of silicon‐based core‐shells. It is based on a selection of the main types of silicon coatings reported in the literature, including carbon, inorganic, organic and double‐layer coatings, Finally, a summary of the advantages and drawbacks of these different types of core‐shells as anode materials for Li‐ion batteries and some insightful suggestions in regards to their use are provided.

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Thermolytically grafted silicon particles with ultrathin carbonaceous coating rich of phenyl moieties as lithium-storage anode material

Cited by 21 publications

References 65 publications

Ultrafast-Laser Micro-Structuring of LiNi0.8Mn0.1Co0.1O2 Cathode for High-Rate Capability of Three-Dimensional Li-ion Batteries

Ultrafast-Laser Micro-Structuring of LiNi0.8Mn0.1Co0.1O2 Cathode for High-Rate Capability of Three-Dimensional Li-ion Batteries

Enhanced Lithium Storage in Micro-Si-Based Anode Materials through Low-Temperature Interface Engineering with an Ultrathin Phenolic Interlayer

Engineering of Silicon Core‐Shell Structures for Li‐ion Anodes

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