Three-dimensional rice husk-originated mesoporous silicon and its electrical properties

Azadeh, Maryam; Zamani, Cyrus; Ataie, A.; Morante, Joan Ramón

doi:10.1016/j.mtcomm.2018.01.003

Cited by 23 publications

(8 citation statements)

References 45 publications

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“…The crystal structure phase purity of all the samples was determined using XRD analysis. The diffraction peaks of pure MP−Si and the MP−Si@C composites were indexed assuming that Si consisted of cubic crystals (JCPDS: 27–1402) (Figure 1a) [27] . We also analyzed the XRD diffraction patterns of the MP−Si@C samples before subjecting them to HF etching and identified diffraction peaks corresponding to impurity phases, such as Mg 2 S, NaCl, and MgO.…”

Section: Resultsmentioning

confidence: 99%

Facile Fabrication of Highly Porous 3D Sponge‐Like Si@C Composites as High‐Performance Anode Materials for Lithium‐Ion Batteries

Min

Nazir

et al. 2022

Batteries & Supercaps

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In this work, we synthesized highly porous 3D sponge‐like mesoporous (MP)‐Si@C composites using mass‐scalable method. The optimized MP−Si@C 1 composite electrode, provided a reversible capacity of 1887 mAh g−1 after 100 discharge−charge cycles with capacity retention of 83 % at the rate of 0.1 C. At high C‐rate the MP−Si@C 1 anode provided reversible capacity of 910 mAh g−1 after 1000 cycles. The MP−Si@C 1/LCO full cell provide a discharge capacity of 1515 mAh g−1 and it works well for 100 cycles. This outstanding electrochemical behavior of the MP−Si@C 1 composite electrode was accredited to the exclusive structure of interconnected Si nanoparticles and the presence of the outer C thin layer. The carbon layer served as a shield, an effective buffer layer to house the extreme volume expansion issue of Si during continuous cycling. The excellent performance of the MP−Si@C 1 composite demonstrated its high applicability as potential anode material for next‐generation LIBs.

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Section: Resultsmentioning

confidence: 99%

Facile Fabrication of Highly Porous 3D Sponge‐Like Si@C Composites as High‐Performance Anode Materials for Lithium‐Ion Batteries

Min

Nazir

et al. 2022

Batteries & Supercaps

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“…In the previous literature, it has been shown that sufficient pure silica can be obtained from rice husk ash by a simple acid washing procedure [15]. It has also been shown that by acid washing, silica with purity >99% can be obtained by burning rice husks at 6000C under normal atmospheric pressure [12,21,22,23,24]. Currently, rice husk is the raw material for the production of a range of silicon-based materials, including silicon carbide, silica, silicon nitride, silicon tetrachloride, pure silicon, and zeolite.…”

Section: Figure 1 Sofc Module Plant Structurementioning

confidence: 99%

Preparation and characterization of RHA based ceramic membrane for gas leak testing in SOFC seals

Gunawan

Sulistyo²,

Setiawan³

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Solid Oxide Fuel Cell (SOFC) systems show great potential in future power generation applications. SOFC has many advantages, including high efficiency, low emission, and flexible modular structure. SOFC is an electrochemical device that converts fuel into electricity directly. If hydrogen gas is used, it will produce electricity and waste products in the form of heat and water vapor. The complete SOFC module system consists of a furnace, cell stack, fuel and oxygen. Several parameters that affect SOFC performance are fuel flow rate, furnace temperature, cell material, and collector current. SOFC consists of anode, electrolyte, cathode, and current collector. These parameters have a correlation with each other in building a SOFC system, resulting in a good cell and optimal output voltage. SOFC based on electrolyte material yttria stabilized zirconia (YSZ) operates at working temperatures between 600 to 1,000°C, so all materials used must be able to withstand these temperatures. In the empirical case to separate each function of the components in the fuel cell, a sealant is needed. The sealant function prevents fuel and oxidant leakage in the stack and electrically isolates the cells in the stack. So the other sealant material requirements are to have thermal and chemical compatibility with other cell components, chemically and physically stable at high temperatures and have good mechanical strength. The composition of the material (RHA, CaO, Al2O3, MgO and BaO) with six formulations (F1-F6) which was determined as a gas leak test specimen through a synthesis process using the ball mill method for 12 hours resulted in a grain variation between 3.808 um – 19.631 um. The production of gas leak test specimens was successfully carried out by molding which was designed to be effective using a material weight of 1.5 grams with a 96% PVA binder as much as 20% by weight. The size of the specimen obtained in the form of a membrane with a thickness of 1-1.1mm. The preparation of the test material can be continued in the next gas leak test process.

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“…This electrochemical reduction process enabled the process temperature to be less than 1000 °C and enabled the reduction reaction to take place at a contact point with an electrode. Other approaches, such as carbothermal reduction of silica using concentrated solar energy 12 and reduction of silica from rice husks, have been reported 13 , 14 . Although these attempts incorporate additional metals or chemicals other than silica and carbon, they involve meaningful routes for producing silicon without using traditional silica reduction processes.…”

Section: Introductionmentioning

confidence: 99%

Ultrafast carbothermal reduction of silica to silicon using a CO2 laser beam

Maeng

Lee

Park

et al. 2020

Sci Rep

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We report the extraction of silicon via a carbothermal reduction process using a CO2 laser beam as a heat source. The surface of a mixture of silica and carbon black powder became brown after laser beam irradiation for a few tens of seconds, and clear peaks of crystalline silicon were observed by Raman shift measurements, confirming the successful carbothermal reduction of silica. The influence of process parameters, including the laser beam intensity, radiation time, nitrogen gas flow in a reaction chamber, and the molar ratios of silica/carbon black of the mixture, on the carbothermal reduction process is explained in detail.

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Three-dimensional rice husk-originated mesoporous silicon and its electrical properties

Cited by 23 publications

References 45 publications

Facile Fabrication of Highly Porous 3D Sponge‐Like Si@C Composites as High‐Performance Anode Materials for Lithium‐Ion Batteries

Facile Fabrication of Highly Porous 3D Sponge‐Like Si@C Composites as High‐Performance Anode Materials for Lithium‐Ion Batteries

Preparation and characterization of RHA based ceramic membrane for gas leak testing in SOFC seals

Ultrafast carbothermal reduction of silica to silicon using a CO2 laser beam

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