Phenyl-rich silicone oil as a precursor for SiOC anode materials for long-cycle and high-rate lithium ion batteries

Halim, Martin; Hudaya, Chairul; Kim, A‐Young; Lee, Joong Kee

doi:10.1039/c5ta09973k

Cited by 105 publications

(85 citation statements)

References 44 publications

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“…These results are in good agreement with the previous XPS study on SiOC materials obtained from other SiOC precursors such as polysiloxane . Interestingly, the distinctive peak corresponding to CC and CC bonds suggests the formation of a free‐carbon domain in the SiOC material during the pyrolysis process, possibly arising from the presence of phenyl functional groups in the silicone oil . This free‐carbon domain is known to provide the higher electrical conductivity of composite materials .…”

Section: Resultsmentioning

confidence: 97%

“…85‐1322), indicating that the intermediate Sb 2 O 3 particles decomposed by antimony acetate during synthesis are successfully reduced to crystalline Sb without the formation of an impurity phase. Furthermore, the Sb‐embedded SiOC composites obtained from silicone oil exhibit a broad peak around 23° with amorphous characteristics, similar to those of SiOC powders, which is in good agreement both with the HR‐TEM analysis shown in Figure S3b in the Supporting Information and a previous study concerning SiOC synthesis from polysiloxane precursors …”

Section: Resultsmentioning

confidence: 99%

“…However, the polysiloxane‐based precursors require the use of additional solvents and/or complicated laboratory procedures. Another attempt to prepare the SiOC materials from silicone oil has been reported by employing direct pyrolysis process while the SiOC powders synthesized were only examined as active materials of anodes in LIB application …”

Section: Introductionmentioning

confidence: 99%

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One‐Pot Synthesis of Antimony‐Embedded Silicon Oxycarbide Materials for High‐Performance Sodium‐Ion Batteries

Lee

Choi

2017

Adv Funct Materials

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Sodium-ion batteries have recently attracted intensive attention due to their natural abundance and low cost. Antimony is a desirable candidate for an anode material for sodium-ion batteries due to its high theoretical capacity (660 mA h g −1 ). However, the utilization of alloy-based anodes is still limited by their inherent huge volume changes and sluggish kinetics. The Sbembedded silicon oxycarbide (SiOC) composites are simply synthesized via a one-pot pyrolysis process at 900 °C without any additives or surfactants, taking advantage of the superior self-dispersion properties of antimony acetate powders in silicone oil. The structural and morphological characterizations confirm that Sb nanoparticles are homogeneously embedded into the amorphous SiOC matrix. The composite materials exhibit an initial desodiation capacity of around 510 mA h g −1 and maintained an excellent capacity retention above 97% after 250 cycles. The rate capability test reveals that the composites deliver capacity greater than 453 mA h g −1 , even at the high current density of 20 C rate, owing to the free-carbon domain of SiOC material. The electrochemical and postmortem analyses confirm that the SiOC matrix with a uniform distribution of Sb nanoparticles provides the mechanical strength without degradation in conductive characteristics, suppressing the agglomeration of Sb particles during the electrochemical reaction.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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One‐Pot Synthesis of Antimony‐Embedded Silicon Oxycarbide Materials for High‐Performance Sodium‐Ion Batteries

Lee

Choi

2017

Adv Funct Materials

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“…High‐resolution Si 2p spectrum of CS2‐1 can be further deconvoluted into three peaks, corresponding to the Si—Si bonds at around 99.4 eV, the Si—C bonds at around 101.5 eV, and the Si—O bonds at around 102.8 eV, respectively . The C 1s spectrum can be deconvoluted into three peaks, corresponding to the C—Si bonds at around 283.7 eV, the C—C bonds at around 284.8 eV, and the C═O bonds at around 285.7 eV, respectively . The Si 2p and C 1s spectra confirmed the presence of elemental Si, free carbon, Si—C bond, and Si—O bond in the composite.…”

Section: Resultsmentioning

confidence: 99%

A Versatile Polymeric Precursor to High‐Performance Silicon Composite Anode for Lithium‐Ion Batteries

Yang

et al. 2019

Energy Tech

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Silicon is a promising anode material for lithium‐ion batteries due to its very high theoretical capacity. Herein, a Si/SiOx@C composite anode is prepared from a polymeric precursor, and the performance of the anode is optimized by controlling the composition of the polymeric precursor. The precursor is produced by cross‐linking divinyl benzene (DVB) and polymethylhydrosiloxane (PMHS). Silicon nanoparticles are formed from the precursor via a molten‐salt reduction process, and a conductive SiOx@C matrix is produced through a subsequent pyrolysis process. As the ratio between DVB and PMHS is adjusted to 2:1, the specific capacity and rate performances of the resulting Si/SiOx@C composite reach the optima. Both the composition and the microstructure of the composite are affected by the composition of the precursor, and, in turn, they determine the performance of the composite anode.

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“…Но главной причиной является большое изменение объема кремния (2.5−3-кратное) в процессах литирования/делитирования, в результате чего происходит растрескивание и быстрая структурная деградация таких электродов. Для того чтобы повысить их циклический ресурс, предлагается использовать тонкие кремниевые пленки, в том числе наноструктурированные [1], легированные [2], упрочненные прослойками из более пластичных или более упругих материалов [3] и др. Активно исследуются композитные 3D-пленки, состоящие из аморфного кремния, армированного кристаллическими включениями силицидов переходных метал-лов [4,5].…”

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Структурные изменения в пленках Si-CuSi при интеркаляции ионов лития

Бучин¹,

Мироненко²,

Наумов³

et al. 2019

Письма В Журнал Технической Физики

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Films of amorphous silicon reinforced with crystalline copper silicide inclusions were tested as anode material in liquid lithium-ion cells. The films were made by the method of layer-by-layer magnetron deposition of amorphous silicon and copper, followed by low-temperature (100 ÷ 200 ° C) annealing of the structure. During the tests, the anodes revealed the effect of long-term intensive growth of their reversible capacity. To describe the effect, a phenomenological model is proposed, based on the counter-migration of silicon and copper atoms in a non-uniform field of elastic mechanical stresses arising during the cycling of a lithium-ion cell.

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Phenyl-rich silicone oil as a precursor for SiOC anode materials for long-cycle and high-rate lithium ion batteries

Abstract: Silicon oxycarbide (SiOC) is gaining increasing attention as a promising anode material for lithium ion batteries due to its higher reversible capacity compared to incumbent graphite.

Cited by 105 publications

References 44 publications

One‐Pot Synthesis of Antimony‐Embedded Silicon Oxycarbide Materials for High‐Performance Sodium‐Ion Batteries

One‐Pot Synthesis of Antimony‐Embedded Silicon Oxycarbide Materials for High‐Performance Sodium‐Ion Batteries

A Versatile Polymeric Precursor to High‐Performance Silicon Composite Anode for Lithium‐Ion Batteries

Структурные изменения в пленках Si-CuSi при интеркаляции ионов лития

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