Silicon oxycarbide ceramics as anodes for lithium ion batteries: influence of carbon content on lithium storage capacity

Wilamowska‐Zawlocka, Monika; Puczkarski, Paweł; Grabowska, Zofia; Kašpar, Jan; Graczyk‐Zajac, Magdalena; Riedel, Ralf; Sorarù, Gian Domenico

doi:10.1039/c6ra24539k

Cited by 49 publications

(30 citation statements)

References 56 publications

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“…Figure b shows the potential profiles of the 2nd, 10th, 100th, 200th, and 500th cycles, respectively. All potential profiles, especially those recorded at higher cycle numbers, exhibit a rather constant slope, which is different from the electrochemical behavior shown by the same material when used as anode in LIBs . This phenomenon can be explained by the electrochemical inactivity of graphitic carbon with respect to sodium intercalation .…”

Section: Resultsmentioning

confidence: 62%

Study of the Na Storage Mechanism in Silicon Oxycarbide—Evidence for Reversible Silicon Redox Activity

et al. 2018

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Silicon‐based compounds are interesting candidate anode materials but show only relatively low electrochemical performances with sodium. Controversial reports are available about the electrochemical interaction between Na and silicon, which encourage to investigate the mechanism in a silicon‐based material in detail. This study reports the results of a systematic investigation of the electrochemical sodium ion storage in silicon oxycarbide (SiCO) using ex situ X‐ray photoelectron spectroscopy and magic‐angle spinning nuclear magnetic resonance spectroscopy. Comparison of pristine and hydrofluoric acid‐etched silicon oxycarbide shows that the silicon oxycarbide is active itself, but not by an alloying process. Instead, results reveal an irreversible structural change and amorphization of SiCO upon the initial sodium uptake and support the existence of reversible insertion‐based reactions in the subsequent cycles.

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Section: Resultsmentioning

confidence: 62%

Study of the Na Storage Mechanism in Silicon Oxycarbide—Evidence for Reversible Silicon Redox Activity

et al. 2018

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“…Additive manufacturing is currently gaining attention as a subject for micro-manufacturing of functional ceramics [20,21]. The structural, electrical, mechanical and biological properties of PDCs can be controlled by tailoring the polymer architecture of the starting polymer precursors [18,19,[22][23][24][25]. The shape of the final ceramic materials will remain identical to that of preceramic green body apart from experiencing volumetric shrinkage and an increase in density.…”

Section: Microstructural Development Of Siocs Mainly Depends On the Smentioning

confidence: 99%

Polymer derived silicon oxycarbide ceramic monoliths: Microstructure development and associated materials properties

Sasikumar

Blugan

Casati

et al. 2018

Ceramics International

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Polymer derived SiOC and SiCN ceramics (PDCs) are interesting candidates for additive manufacturing techniques to develop micro sized ceramics with the highest precision. PDCs are obtained by the pyrolysis of crosslinked polymer precursors at elevated temperatures. Within this work, we are investigating PDC SiOC ceramic monoliths synthesized from liquid polysiloxane precursor crosslinked with divinylbenzene for fabrication of conductive electromechanical devices. Microstructure of the final ceramics was found to be greatly influenced by the pyrolysis temperature. Crystallisation in SiOC ceramics starts above 1200 °C due to the onset of carbothermal reduction leading to the formation of SiC and SiO2 rich phases. Microstructural characterization using ex-situ X-ray diffraction, FTIR, Raman spectra and microscopy imaging confirms the formation of nano crystalline SiC ceramics at 1400 °C. The electrical and

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“…This corresponds to the formation of the solid-electrolyte interface (SEI) on the boundaries of the ceramic phase [ 69 , 70 ]. Further on the CV curves of the SiOC-based materials, a broad peak between 0 and 0.3 V (II), which corresponds to lithium insertion into the ceramic [ 29 , 69 , 71 ], is present. The cathodic current in this range decreases with the increasing graphite content in the composites, but there are no pronounced peaks at 0.16 and 0.05 V as registered for pure graphite.…”

Section: Electrochemical Testingmentioning

confidence: 99%

“…The liquid route allows facile mixing with other materials for making homogeneous composites. Pure PDCs have been tested as a material for lithium-ion batteries [ 27 , 28 , 29 ] and lithium-ion capacitors [ 30 ] as they exhibit high capacity up to 920 mAh g −1 , good cyclability and good rate capability. PDCs have also been considered as an electrochemically active and mechanically resistant matrix for lithium-alloying compounds such silicon [ 31 , 32 ], tin [ 33 , 34 ] or antimony [ 35 , 36 ].…”

Section: Introductionmentioning

confidence: 99%

Silicon Oxycarbide-Graphite Electrodes for High-Power Energy Storage Devices

et al. 2020

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Herein we present a study on polymer-derived silicon oxycarbide (SiOC)/graphite composites for a potential application as an electrode in high power energy storage devices, such as Lithium-Ion Capacitor (LIC). The composites were processed using high power ultrasound-assisted sol-gel synthesis followed by pyrolysis. The intensive sonication enhances gelation and drying process, improving the homogenous distribution of the graphitic flakes in the preceramic blends. The physicochemical investigation of SiOC/graphite composites using X-ray diffraction, 29Si solid state NMR and Raman spectroscopy indicated no reaction occurring between the components. The electrochemical measurements revealed enhanced capacity (by up to 63%) at high current rates (1.86 A g−1) recorded for SiOC/graphite composite compared to the pure components. Moreover, the addition of graphite to the SiOC matrix decreased the value of delithiation potential, which is a desirable feature for anodes in LIC.

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Silicon oxycarbide ceramics as anodes for lithium ion batteries: influence of carbon content on lithium storage capacity

Abstract: We report here on the synthesis and characterization of silicon oxycarbide (SiOC) in view of its application as a potential anode material for Li-ion batteries.

Cited by 49 publications

References 56 publications

Study of the Na Storage Mechanism in Silicon Oxycarbide—Evidence for Reversible Silicon Redox Activity

Study of the Na Storage Mechanism in Silicon Oxycarbide—Evidence for Reversible Silicon Redox Activity

Polymer derived silicon oxycarbide ceramic monoliths: Microstructure development and associated materials properties

Silicon Oxycarbide-Graphite Electrodes for High-Power Energy Storage Devices

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