Maximizing the utilization of active sites through the formation of native nanovoids of silicon oxycarbide as anode materials in lithium-ion batteries

Lee, Se Hun; Park, Changyong; Do, Kwanghyun; Ahn, Hye Shin

doi:10.1016/j.ensm.2020.11.018

Cited by 42 publications

(32 citation statements)

References 40 publications

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“…25,40,41 Lee et al reported that controlling the nanovoids in the Si-O-C domain derived from PSS-octakis(dimethylsilyloxy) silsesquioxane (POSS) provided efficient ion pathway and withstood structural degradation by buffering during lithiation/ delithiation. 33 As a result, the authors were able to achieve a capacity of 412 mA h g À1 at a high current density of 3600 mA g À1 . Furthermore, pyrolysis parameters are always crucial in controlling the microstructure (e.g.…”

Section: Introductionmentioning

confidence: 94%

“…To circumvent the issues associated with silicon electrodes, silicon oxycarbide (SiOC) derived from pyrolysis of ceramic precursor polymers has renewed attention in recent years from electrochemical storage point of view. [24][25][26][27][28][29][30][31][32][33] Potential of polymerderived ceramic (PDC) (e.g. ; SiOC, SiCN) materials in energy storage, initially proposed by Dahn et al in 1990s, largely depends on the chemical structures of the material.…”

Section: Introductionmentioning

confidence: 99%

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Self-supporting carbon-rich SiOC ceramic electrodes for lithium-ion batteries and aqueous supercapacitors

et al. 2021

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Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Self-supporting carbon-rich SiOC ceramic electrodes for lithium-ion batteries and aqueous supercapacitors

et al. 2021

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“…A MgH2-AlCl3-SiO2 melt system was developed to synthesize nano-Si through the reduction of SiO2 by MgH2 into molten AlCl3. The obtained nano-Si product shows an average particle size of 22.4 nm and exhibits a superior electrochemical storage capacity of 1185 mAh•g −1 over 300 cycles at 0.2 A•g −1 and a low thickness variation of 14.5% at 2 A•g −1 over 500 cycles, as shown in Figure 4b-d [81]; and (e) Rate capability of the different silicon oxycarbide (SiOC) samples measured at various C-rates from 180 to 3600 mA•g −1 [82].…”

Section: Silicon-based Anode Materialsmentioning

confidence: 99%

“…Silicon oxycarbide (SiOC, SiO n C 4-n (0 ≤ n ≤ 4)) has been developed for anode material through the introduction of PSS-Octakis (dimethylsilyloxy) silsesquioxane (POSS) into the synthesis process of SiOC. The rate performance of these materials is shown in Figure 4e [82]. Silicon oxycarbide (SiOC) was also synthetized by pyrolysis using silicone oil and phenyl group-containing additives (divinylbenzene -DVB) as precursor, leading to a high reversible capacity (550 mAh•g −1 at 200 mA•g −1 ) [83].…”

Section: Silicon-based Anode Materialsmentioning

confidence: 99%

“…Figure 4. (a) Schematic illustration of the preparation process of amorphous carbon-coated silicon [74], (b) CV curves of Si-200 at a scan rate of 0.1 mV•s −1 ; (c) Galvanostatic discharge/charge profiles of Si-200 at 0.2 A•g −1 ; (d) Cycling performance of various nano-Si at 0.2 A•g −1[81]; and (e) Rate capability of the different silicon oxycarbide (SiOC) samples measured at various C-rates from 180 to 3600 mA•g −1[82].…”

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Recent Advances on Materials for Lithium-Ion Batteries

et al. 2021

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Environmental issues related to energy consumption are mainly associated with the strong dependence on fossil fuels. To solve these issues, renewable energy sources systems have been developed as well as advanced energy storage systems. Batteries are the main storage system related to mobility, and they are applied in devices such as laptops, cell phones, and electric vehicles. Lithium-ion batteries (LIBs) are the most used battery system based on their high specific capacity, long cycle life, and no memory effects. This rapidly evolving field urges for a systematic comparative compilation of the most recent developments on battery technology in order to keep up with the growing number of materials, strategies, and battery performance data, allowing the design of future developments in the field. Thus, this review focuses on the different materials recently developed for the different battery components—anode, cathode, and separator/electrolyte—in order to further improve LIB systems. Moreover, solid polymer electrolytes (SPE) for LIBs are also highlighted. Together with the study of new advanced materials, materials modification by doping or synthesis, the combination of different materials, fillers addition, size manipulation, or the use of high ionic conductor materials are also presented as effective methods to enhance the electrochemical properties of LIBs. Finally, it is also shown that the development of advanced materials is not only focused on improving efficiency but also on the application of more environmentally friendly materials.

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On the Practical Applicability of Rambutan‐like SiOC Anode with Enhanced Reaction Kinetics for Lithium‐Ion Storage

Yuan

et al. 2023

Adv Funct Materials

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Silicon oxycarbide (SiOC) possesses great potential in lithium‐ion batteries owing to its tunable chemical component, high reversible capacity, and small volume expansion. However, its commercial application is restricted due to its poor electrical conductivity. Herein, rambutan‐like vertical graphene coated hollow porous SiOC (Hp‐SiOC@VG) spherical particles with an average diameter of 302 nm are fabricated via a hydrothermal treatment combined CH4 pyrolysis strategy for the first time. As‐prepared Hp‐SiOC@VG exhibits a large reversible capacity of 729 mAh g−1 at 0.1 A g−1, remarkable cycling stability of 98% capacity retention rate after 600 cycles at 1.0 A g−1 and high rate capability of 289 mAh g−1 at 5.0 A g−1 owing to the unique structure of the particles and the electrical conductivity of the vertical graphene. Density functional theory calculations reveal that the higher contents of SiO3C and SiO2C2 structural units in the SiOC are beneficial to enhance the Li+ storage capacity. Additionally, the full‐cell assembled with Hp‐SiOC@VG and LiFePO4 delivers up to 74% capacity retention rate after 100 cycles at 0.2 A g−1. This work reports a new way for the facile preparation of template‐free hollow porous materials and expands the application prospects of SiOC‐based anode for lithium‐ion batteries.

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Maximizing the utilization of active sites through the formation of native nanovoids of silicon oxycarbide as anode materials in lithium-ion batteries

Cited by 42 publications

References 40 publications

Self-supporting carbon-rich SiOC ceramic electrodes for lithium-ion batteries and aqueous supercapacitors

Self-supporting carbon-rich SiOC ceramic electrodes for lithium-ion batteries and aqueous supercapacitors

Recent Advances on Materials for Lithium-Ion Batteries

On the Practical Applicability of Rambutan‐like SiOC Anode with Enhanced Reaction Kinetics for Lithium‐Ion Storage

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