Carbon-enriched SiOC ceramics with hierarchical porous structure as anodes for lithium storage

Xia, Kedong; Liu, Xiao; He, Liu; Lu, Yun; Liu, Zhenmin; Li, Yunling; Duan, Lingyao; Hou, Zhenyu; Li, Renlong; Wang, Deli

doi:10.1016/j.electacta.2021.137899

Cited by 38 publications

(24 citation statements)

References 48 publications

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“…The doping introduced more defects in CuO, such as oxygen vacancies, which can generate more active sites for gas sensing. The specimens had similar spectra of Si 2p and C 1s, as these elements were from the SiCuOC matrix, while the O 1s spectra revealed an apparent difference (Figure d–f) . The Si 2p peak corresponded to SiO 3 C, while the deconvolution of the C 1s spectrum presented three peaks corresponding to C–C, C–O, and CO.…”

Section: Resultsmentioning

confidence: 84%

“…The specimens had similar spectra of Si 2p and C 1s, as these elements were from the SiCuOC matrix, while the O 1s spectra revealed an apparent difference (Figure 3d−f). 38 The Si 2p peak corresponded to SiO The gas sensing performance of the sensitized structures was then evaluated by connecting them to the tester and recording the resistance variation to the gases. The measurements were conducted under laboratory conditions (relative humidity, RH of about 25%).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Zero-Expanded Gas Sensing of Chiral-Rotating Chemiresistive SiCuOC Structures

Zhou

Mei

et al. 2022

Chem. Mater.

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Chiral-rotating gas sensing structures composed of chemiresistive-sensitized SiCuOC have been presented to provide a facile method for reducing the thermal expansion of gas sensors working at high temperatures. The structures can disperse thermal stress by heat-induced torsion of their units while maintaining the dimensional stability of the integral construction. Vat photopolymerization constructed Cu-doped SiOC substrates with a high resolution, while Ag-doped CuO nanoclusters further modified them. Taking advantage of the synergistic sensitization effect of the substrate and the surface sensing layer, the structure exhibited a high response/recovery speed (24/32 s) and a response value of 54.45% to 100 ppm acetone; 97.19% of its initial response was maintained after a long-term detection. The thermal expansion coefficient of the sensing structure reached 1.04 × 10 −6 /K at the working temperature, revealing a near-zero expansion. Compressive strength and Young's modulus of the structures were 31.93 MPa and 3.38 GPa, respectively. Meanwhile, the structures realized regular gas detection under pressure (85.02 kPa) and thermal (325 °C) loading, as their high deformation resistance protected the integrity and connection of the surface sensing layer. Thus, the work proved the dimensional stabilization effect of chemiresistive sensing structures with chiral-rotating design, realizing stable gas detection in complex loading environments.

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Section: Resultsmentioning

confidence: 84%

Section: ■ Results and Discussionmentioning

confidence: 99%

Zero-Expanded Gas Sensing of Chiral-Rotating Chemiresistive SiCuOC Structures

Zhou

Mei

et al. 2022

Chem. Mater.

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“…The adsorption and the photocatalytic performances of the produced samples were assessed in a series of tests using methylene blue (MB) as a tracer dye and a UV light source. The initial results (Figure S3a) showed a significant adsorption of MB by the produced PDC material, and that the commonly used period of 2 h for adsorption in the dark [40,45,46] was not sufficient to reach equilibrium. Therefore, performing irradiation experiments after a short adsorption time in the dark would lead to misleading photocatalytic degradation capacities.…”

Section: Adsorption and Photocatalytic Activitymentioning

confidence: 99%

“…The SiOC structure consists of a network of corner-shared silicon-centered tetrahedra (Si-C and Si-O bonds) composed of a mixture of SiO 4 , SiO 3 C, SiO 2 C 2 , SiOC 3 and SiC 4 , which remain predominantly amorphous at temperatures up to 1250 • C [33,34]. The versatility of the SiOC chemistry allows the properties to be modified for applications in various fields [35], such as gas separation [36,37], catalytic subtracts [12,38], and energy storage [39,40].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Pyrolysis Temperature and TiO2-Incorporation on the Properties of SiOC/SiC Composites for Efficient Wastewater Treatment Applications

et al. 2022

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This study focuses on the development of porous ceramer and SiOC composites which are suitable for microfiltration applications, using a mixture of polysiloxanes as the preceramic precursor. The properties of the membranes—such as their pore size, hydrophilicity, specific surface area, and mechanical resistance—were tailored in a one-step process, according to the choice of pyrolysis temperatures (600–1000 °C) and the incorporation of micro- (SiC) and nanofillers (TiO2). Lower pyrolysis temperatures (<700 °C) allowed the incorporation of TiO2 in its photocatalytically active anatase phase, enabling the study of its photocatalytic decomposition. The produced materials showed low photocatalytic activity; however, a high adsorption capacity for methylene blue was observed, which could be suitable for dye-removal applications. The membrane performance was evaluated in terms of its maximum flexural strength, water permeation, and separation of an oil-in-water emulsion. The mechanical resistance increased with an increase of the pyrolysis temperature, as the preceramic precursor underwent the ceramization process. Water fluxes varying from 2.5 to 370 L/m2·h (2 bar) were obtained according to the membrane pore sizes and surface characteristics. Oil-rejection ratios of 81–98% were obtained at an initial oil concentration of 1000 mg/L, indicating a potential application of the produced PDC membranes in the treatment of oily wastewater.

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“…There are also works to further improve it by introducing additional carbon materials. − Nevertheless, the long cycle stability of SiOC anode materials still needs to be further improved. Therefore, more precise and synergistic adjustment of free carbon, multi-micro–mesoporous, and multiphase structure and nanoscale particles to prepare high-capacity SiOC-based anode materials with ultralong cycle life can be expected.…”

Section: Introductionmentioning

confidence: 99%

Kill Two Birds with One Stone: Multifunctional Porous SiOC–Fe₂O₃ Composite for Li Ion Energy Conversion and Electromagnetic Wave Absorption

Liu

Chen

et al. 2022

ACS Appl. Electron. Mater.

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It is necessary to design a scalable composite material with a rational structure for Li-ion batteries and electromagnetic wave absorption. Herein, we developed a modified precursor-driven method of spacerassisted oxidation to prepare heterogeneous multi-interface SiOC-based composite ceramic nanoparticles. The outstanding structural design regulated by the ratio of raw materials tailored its functional potential in the fields of Li-ion batteries and electromagnetic wave absorption. The addition of a small amount of iron-sol produced small-sized ceramic nanoparticles bridged by carbon ribbons, which can provide efficient charge transfer kinetics and volumetric buffering capacity. Used in Li-ion battery anodes, it exhibited a specific discharge capacity of 514.4 mAh/g after 1000 cycles at a current density of 0.5 A/g with durable long cycling performance. In addition, the addition of high iron-sol induced the formation of porous core−shell nanoparticles and performed excellent electromagnetic wave absorption ability. The ceramic nanoparticles with carbon content of about 30% had the lowest reflection loss in the X-band of −55.5 dB, and the effective absorption range was 8.48−12.4 GHz, which basically covered the entire X-band. This strategy enriches the preparation and application of multifunctional composite ceramic nanoparticles.

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Carbon-enriched SiOC ceramics with hierarchical porous structure as anodes for lithium storage

Cited by 38 publications

References 48 publications

Zero-Expanded Gas Sensing of Chiral-Rotating Chemiresistive SiCuOC Structures

Zero-Expanded Gas Sensing of Chiral-Rotating Chemiresistive SiCuOC Structures

Influence of the Pyrolysis Temperature and TiO2-Incorporation on the Properties of SiOC/SiC Composites for Efficient Wastewater Treatment Applications

Kill Two Birds with One Stone: Multifunctional Porous SiOC–Fe₂O₃ Composite for Li Ion Energy Conversion and Electromagnetic Wave Absorption

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Carbon-enriched SiOC ceramics with hierarchical porous structure as anodes for lithium storage

Cited by 38 publications

References 48 publications

Zero-Expanded Gas Sensing of Chiral-Rotating Chemiresistive SiCuOC Structures

Zero-Expanded Gas Sensing of Chiral-Rotating Chemiresistive SiCuOC Structures

Influence of the Pyrolysis Temperature and TiO2-Incorporation on the Properties of SiOC/SiC Composites for Efficient Wastewater Treatment Applications

Kill Two Birds with One Stone: Multifunctional Porous SiOC–Fe2O3 Composite for Li Ion Energy Conversion and Electromagnetic Wave Absorption

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Kill Two Birds with One Stone: Multifunctional Porous SiOC–Fe₂O₃ Composite for Li Ion Energy Conversion and Electromagnetic Wave Absorption