Silicon carbide (SiC) derived from agricultural waste potentially competitive with silicon anodes

Yu, Mengjie; Temeche, Eleni; Indris, Sylvio; Lai, Wei‐Hong; Laine, Richard M.

doi:10.1039/d2gc00645f

Cited by 8 publications

(12 citation statements)

References 101 publications

(144 reference statements)

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“…[23,24] Finally, the SiC/HC (Si 2 N 2 O/HC) mixtures produced from SDRHA can serve as anodes in lithium ion batteries offering capacities of ~950 (750) mAh g À 1 which is three times that of traditional graphite anodes in lithium ion batteries. [25] Additionally, these systems undergo a volume change of � 1 % potentially making them competitive with silicon-based lithium ion batteries. [25] Note that most high purity graphite used in Liion batteries commercially produced today is synthetic and produced at ~2000 °C making it a CO 2 , energy and equipment intensive process.…”

Section: Production Of Biobased Silicamentioning

confidence: 99%

“…[25] Additionally, these systems undergo a volume change of � 1 % potentially making them competitive with silicon-based lithium ion batteries. [25] Note that most high purity graphite used in Liion batteries commercially produced today is synthetic and produced at ~2000 °C making it a CO 2 , energy and equipment intensive process. The HC produced coincident with SiC is pure enough to at least in part supplant the need for graphite in these systems again, indicating an economic and green reward derived from RHA.…”

Section: Production Of Biobased Silicamentioning

confidence: 99%

“…It was further demonstrated that SDRHA can be used simply as is to make SiC, Si 3 N 4 or Si 2 N 2 O on heating at 1400–1500 °C in Ar, N 2 or N 2 : H 2 (85 : 15) in high yield and at 400–500 °C below traditional synthesis temperatures again because of SDRHA's nanocomposite nature [22] . Still another advantage comes from controlling the SiO 2 : C ratio, as it is possible to coincidentally produce small amounts of hard carbon (HC) with the SiC, Si 2 N 2 O. HC is a mixture of graphitic and amorphous carbon.…”

Section: Green Chemistry Technologiesmentioning

confidence: 99%

See 2 more Smart Citations

Biobased Silicon and Biobased Silica: Two Production Routes Whose Time has Come**

Ciriminna

Laine

Pagliaro³

2023

ChemSusChem

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This study offers an updated bioeconomy perspective on biobased routes to high‐purity silicon and silica in the context of the societal, economic and environmental trends reshaping chemical processes. We summarize the main aspects of the green chemistry technologies capable of transforming current production methods. Coincidentally, we discuss selected industrial and economic aspects. Finally, we offer perspectives of how said technologies could/will reshape current chemical and energy production.

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Section: Production Of Biobased Silicamentioning

confidence: 99%

Section: Production Of Biobased Silicamentioning

confidence: 99%

Section: Green Chemistry Technologiesmentioning

confidence: 99%

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Biobased Silicon and Biobased Silica: Two Production Routes Whose Time has Come**

Ciriminna

Laine

Pagliaro³

2023

ChemSusChem

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“…Thus, rice straw is composed of cellulose, hemicellulose, lignin, and a significant amount of Si, and the biogenic silicon has attracted considerable interest. For example, silica from rice husk ash can be reduced using a carbon source such as wood, charcoal, or coal at temperatures of ≥1700 °C or higher to produce silicon, or reduced to SiC, Si 3 N 4 , or Si 2 N 2 O [6,7] . Another way is to pre‐treat the rice husk ash with acid to remove other trace metals, and then roast it to produce silica with different pore sizes [8,9] .…”

Section: Introductionmentioning

confidence: 99%

Influence of Different Treatments on the Structure and Conversion of Silicon Species in Rice Straw to Tetraethyl Orthosilicate (TEOS)

Sun

Feng

et al. 2023

ChemistryOpen

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The production of tetraethyl orthosilicate (TEOS) from biomass provides a new way for TEOS production and biomass valorization. In this study, rice straw was treated using different fractionation methods, and the content, state, and reactivity of Si in the treated samples were investigated. It was found that acid treatment and ethanol extraction kept most Si in the biomass, while alkali treatment caused significant Si loss. Si was mainly present in the SiOx, Si−O−C, and Si−O−Si states in the surface of raw rice straw, cellulose and Klason lignin. The results showed that the Si−O−Si state in rice straw was beneficial for the formation of TEOS. The removal of lipids from rice straw facilitated the production of TEOS, giving the highest TEOS yield of 76.2 %. In contrast, the production of TEOS from other samples became difficult; the simultaneous conversion of the three organic components of rice straw also facilitated the production of TEOS.

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“…The accompanying hard carbon can be removed by oxidatively generating (SiC/O) nanocomposites. 33,34 The SiC/HC anodes exhibit charge/discharge capacities 3× that of current graphite anodes at >950 mAh g −1 following slow cycling (C/10-C/2), which promotes distinctive capacity increases. The coincidentally formed hard carbon provides positive effects on anode performance.…”

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confidence: 99%

Sustainable SiC Composite Anodes, Graphite Accelerated Lithium Storage

Temeche

Indris

et al. 2023

J. Electrochem. Soc.

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Realizing more holistic electrification in society to disengage current dependence on nonrenewable fuels requires balancing between energy storage mechanisms and actual environmental benefits gained from the transition from traditional resources. Given that the majority of greenhouse gas emissions in battery value chains originate from material mining and production, silicon carbide (SiC) derived from the agricultural waste, rice hull ash (RHA), is introduced as an environmentally-benign alternative anode material. SiC with hard carbon (SiC/HC) exhibits capacity increases on long-term cycling, reaching capacities of >950 mAh g-1 competitive with elemental Si with complementary porous spaces. Herein, a relatively low amount (< 30 wt. %) of graphite added to SiC/HC composites greatly promotes capacity increases while retaining sustainability. Comparison between graphite contents found the optimized 30 wt. % graphite (SiC/HC/30G) boosted performance, doubling capacity increasing rate and subsequently saving >70 % time to reach target specific capacities at C/10. At 2C, SiC/HC/30G offers enhanced specific capacities at ≈220 mAh g-1. The positive effects from the coincidentally formed HC are demonstrated by oxidizing HC to form SiC/O, followed by graphite addition. Experimental post-mortem analyses support that SiC/graphite composites provide a promising solution for implementing agricultural waste-derived material for next-generation lithium storage.

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Silicon carbide (SiC) derived from agricultural waste potentially competitive with silicon anodes

Abstract: Biomass-derived materials offer low carbon approaches to energy storage. High surface area SiC w/wo 13 wt. % hard carbon (SiC/HC, SiC/O), derived from carbothermal reduction of silica depleted rice hull...

Cited by 8 publications

References 101 publications

Biobased Silicon and Biobased Silica: Two Production Routes Whose Time has Come**

Biobased Silicon and Biobased Silica: Two Production Routes Whose Time has Come**

Influence of Different Treatments on the Structure and Conversion of Silicon Species in Rice Straw to Tetraethyl Orthosilicate (TEOS)

Sustainable SiC Composite Anodes, Graphite Accelerated Lithium Storage

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