Coating nanoparticle-assembled Si microspheres with carbon for anode material in lithium-ion battery

Qu, Fangmu; She, Guangwei; Wang, Jiantao; Qi, Xiaopeng; Li, Shengyang; Zhang, Shaoyang; Mu, Lixuan; Shi, Wensheng

doi:10.1016/j.jpcs.2018.09.037

Cited by 19 publications

(8 citation statements)

References 42 publications

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“…, which indicate that crystalline Si phases exist in both Si and Si/C composites. [14] The amount of carbon incorporated in the coating was determined by thermogravimetric analysis (TGA). Figure 1b shows the thermogravimetrical analysis (TGA) data of Si and Si/ C composites.…”

Section: Resultsmentioning

confidence: 99%

“…Literature reports reveal the enhanced electrochemical performance of carbon-coated Si and the printability of the prepared ink for ink-jet printing is increased. [6,14,18] The printability of an ink is usually connected to different material properties and ink fluidity behaviour as well as on the chosen printing procedure. Two inks were prepared using Si or Si/C as active materials, polyvinyl alcohol (PVA) as binder and conductive carbon (C65) as additive to render the slurry conductive.…”

Section: Resultsmentioning

confidence: 99%

“…This improved performance can be ascribed to the conductive carbon coating resulting in a higher specific capacity and cycling stability of the electrode. [14,19] The areal capacities of the Si and Si/C electrodes amount to 0.5 mAh/cm 2 and 0.65 mAh/ cm 2 at the 17th cycle (first cycle in the long-term cycling at 2 A/ Table S1. The current densities in a) are given in units of A/g.…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

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Tailored Silicon/Carbon Compounds for Printed Li–Ion Anodes

Sukkurji

Issac

Singaraju

et al. 2020

Batteries & Supercaps

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Silicon (Si) has turned out to be a promising active material for next-generation lithium-ion battery anodes. Nevertheless, the issues known from Si as electrode material (pulverization effects, volume change etc.) are impeding the development of Si anodes to reach market maturity. In this study, we are investigating a possible application of Si anodes in low-power printed electronic applications. Tailored Si inks are produced and the impact of carbon coating on the printability and their electrochemical behavior as printed Si anodes is investigated. The printed Si anodes contain active material loadings that are practical for powering printed electronic devices, like electrolyte gated transistors, and are able to show high capacity retentions. A capacity of 1754 mAh/g Si is achieved for a printed Si anode after 100 cycles. Additionally, the direct applicability of the printed Si anodes is shown by successfully powering an ink-jet printed transistor.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Electrochemical Characterizationmentioning

confidence: 99%

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Tailored Silicon/Carbon Compounds for Printed Li–Ion Anodes

Sukkurji

Issac

Singaraju

et al. 2020

Batteries & Supercaps

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“…Such huge volume changes often lead to the pulverization and dispersion of the Si particles, the instability of the solid electrolyte interphase (SEI), the loss of electronic percolation and the electrode film delamination, which strongly reduces the electrochemical performance [1][2][3][4]. Different strategies have been proposed to address these issues, including the use of Si nanostructures [5][6][7][8], coatings and composites with carbon [9][10][11][12] and/or other materials [13][14][15][16][17]. Such composites generally consist of Si particles dispersed into a host matrix formed by electrochemically inactive and/or active particles.…”

Section: Introductionmentioning

confidence: 99%

Si/Cu-Zn(ox)/C composite as anode material for Li-ion batteries

Chamas

et al. 2021

Solid State Ionics

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“…In addition, the synthesis of nanostructured Si with controllable dimensions is usually complicated and high-cost. [20][21][22][23] Therefore, more scalable and economical methods to prepare Si materials with optimal critical fracture size still remain to be exploited.…”

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confidence: 99%

Self‐Adapting Electrochemical Grinding Strategy for Stable Silicon Anode

Wang

Man

Yang

et al. 2021

Adv Funct Materials

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The pulverization of silicon during lithiation/delithiation due to its huge volume change results in a loss of electrochemical activity. In this work, advantage is taken of the unavoidable pulverization and an innovative strategy of in-situ self-adapting electrochemical grinding (ECG) is designed for stable silicon anode. MgH 2 is utilized as the grinding aid to electrochemically grind micronsized Si particles. During ECG process, the lithiation processes of MgH 2 and Si occur at different potentials and both result in appreciable volume expansion, leading to a strong internal stress inside the electrode. With this strong internal stress, the lithiation products of MgH 2 , i.e., Mg and LiH, would migrate into the cracked Si particles and gradually transform into a conductive matrix consisting of ionic conductive LiH and electronic conductive via partially reversible lithiation of Mg. After ECG process, micronsized Si particles are spontaneously grinded to an equilibrium size, which can accommodate the volume change and ensure the stable cycling. As prepared Si anode delivers an excellent reversible specific capacity of 3228 mAh g −1 and a capacity retention of 91% after 200 cycles. The proposed in situ self-adapting ECG strategy offers a unique perspective for the development of Si-based anode materials for next-generation lithium ion batteries.

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Coating nanoparticle-assembled Si microspheres with carbon for anode material in lithium-ion battery

Cited by 19 publications

References 42 publications

Tailored Silicon/Carbon Compounds for Printed Li–Ion Anodes

Tailored Silicon/Carbon Compounds for Printed Li–Ion Anodes

Si/Cu-Zn(ox)/C composite as anode material for Li-ion batteries

Self‐Adapting Electrochemical Grinding Strategy for Stable Silicon Anode

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