Stable anodes for lithium-ion batteries based on tin-containing silicon oxycarbonitride ceramic nanocomposites

Wang, Jun; Kober, Delf; Shao, Gaofeng; Epping, Jan Dirk; Görke, Oliver; Li, Shuang; Gurlo, Aleksander; Bekheet, Maged F.

doi:10.1016/j.mtener.2022.100989

Cited by 15 publications

(58 citation statements)

References 46 publications

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“…The complete polymer‐to‐ceramic transformation is confirmed by ATR‐FTIR characterization of the BPSi aerogel and SiOCN ceramic aerogels. As shown in Figure 2B, the absorption bands corresponding to –CH 3 (2930 cm −1 ), –CH=N– (1639 cm −1 ), Si–CH 2 – (1265 cm −1 ), Si–CH 3 (825 cm −1 ), and Si–OH (918 cm −1 ) 36,41 groups assigned to BPSi aerogel are not observed in the spectra of SiOCN ceramic aerogels obtained by pyrolysis at high temperatures, whereas absorption bands attributed to Si–O–Si (1054 cm −1 ), Si–N–Si (948 cm −1 ), Si–C (793 cm −1 ), and C=C (1584 cm −1 ) are detected 42–44 . These results confirm the formation of SiOCN ceramic after pyrolyzing BPSi aerogel precursor at 900°C under argon atmosphere.…”

Section: Resultsmentioning

confidence: 96%

Bridged polysilsesquioxane‐derived SiOCN ceramic aerogels for microwave absorption

Shao

Ding

et al. 2022

J Am Ceram Soc.

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The development of high‐performance microwave absorption materials in harsh environment is highly desirable but challenging. Herein, lightweight silicon oxycarbonitride (SiOCN) ceramic aerogels were fabricated by the pyrolysis of bridged polysilsesquioxane aerogels, which was presynthesized by a sol–gel method followed by vacuum drying. The structural order and content of free carbon phase determined by pyrolysis temperature play a critical role in modulating the impedance matching and attenuation capacity. The as‐prepared SiOCN aerogel pyrolyzed at 1000°C achieves a minimal reflection loss of −64.2 dB at 8.96 GHz and a broad bandwidth of 5.4 GHz at a low thickness of 2.15 mm. The hierarchical pore structure, abundant heterogeneous amorphous SiOCN/free carbon interfaces, and conductive free carbon phase benefit the superior absorption performance by forming good impedance matching, multiple scattering, interface polarization, and conduction losses. This work provides an insight for the rational design of polymer‐derived ceramic aerogel‐based microwave absorption materials for potential application under extreme conditions such as high‐temperature and oxidation environments.

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Section: Resultsmentioning

confidence: 96%

Bridged polysilsesquioxane‐derived SiOCN ceramic aerogels for microwave absorption

Shao

Ding

et al. 2022

J Am Ceram Soc.

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“…These results suggest that the used tin catalyst yielded metallic tin on the surface of SiOC nanobeads during pyrolysis. [ 12,16,17,32 ]…”

Section: Resultsmentioning

confidence: 99%

Magnesium‐Ion Battery Anode from Polymer‐Derived SiOC Nanobeads

Guo,

Icin,

Vakifahmetoglu

et al. 2023

Adv Funct Materials

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Tin‐containing silicon oxycarbide (SiOC/Sn) nanobeads are synthesized with different carbon/tin content and tested as electrodes for magnesium‐ion batteries. The synthesized ceramics are characterized by thermogravimetric‐mass spectroscopy, Fourier‐transform infrared spectroscopy, X‐ray diffraction (XRD), Raman spectroscopy, N2 sorption analysis, scanning electron microscope, energy‐dispersive X‐ray, and elemental analysis. Galvanostatic cycling tests, rate performance tests, electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) tests, and ex situ XRD measurements are conducted. Results of battery performance tests present a high capacity of 198.2 mAh g−1 after the first discharging and a reversible capacity of 144.5 mAh g−1 after 100 cycles at 500 mA g−1. Excellent rate performance efficiency of 85.2% is achieved. Battery performances in this research are influenced by surface area, and tin contentof the SiOC/Sn nanobeads. EIS, CV tests, and ex situ XRD measurements reveal that higher surface area contributes to higher capacity by providing more accessible Mg2+ ion storage sites and higher rate capability by improving the diffusion process. Higher Sn content increases battery capacity through reversible Mg‐Mg2Sn‐Mg alloying/dealloying process and improves the rate performances by increasing electrical conductivity. Besides, SiOC advances cycling stability by preventing electrode collapse and enhances the capacity due to higher surface capacitive effects.

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“…Moreover, the precursor polymer has obvious physical properties of organic polymers, which can be formed by the molding technology usually applicable to organic polymers [ 5 ], such as film coating [ 6 ], impregnation [ 7 ], vapor deposition [ 8 ], electrostatic silk imitation [ 9 ], 3D printing [ 10 ], etc., and then ceramic products can be obtained by high-temperature pyrolysis. Therefore, PDCs play an important role in the production of high-performance ceramics with complex structures [ 11 ], and have important applications in aerospace [ 12 ], new energy [ 13 ], optical metamaterials [ 14 ], military [ 15 ], and other fields.…”

Section: Introductionmentioning

confidence: 99%

Effect of Free Cross-Linking Rate on the Molding of Bulk SiOC Ceramics

Zheng

Sun

Ma³

et al. 2023

Materials

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Polymer-derived ceramics (PDCs) have many advantages in ceramic molding and ceramic properties, but because of the obvious volume shrinkage in the process of precursor transformation into ceramics, it is easy for defects to appear in the forming process of bulk PDCs. Herein, theoretical analyses and experimental studies were carried out to improve the quality of sintered samples and realize the parametric design of raw materials. Firstly, based on the HPSO/D4Vi cross-linking system, the mathematical model of the free cross-linking ratio was established, and the theoretical value was calculated. After that, the samples with different free cross-linking rates were heated at 450 °C and 650 °C for different holding times. It was found that the free cross-linking ratio (α) had a significant impact on the weight loss of the samples. When the difference of the α value was 10%, the difference of the samples’ weight loss ratio could reach 30%. Finally, the morphology of sintered products with different α values was analyzed, and it was found that obvious defects will occur when the free cross-linking ratio is too high or low; when this value is 40.8%, dense and crack-free bulk ceramics can be obtained. According to analysis of the chemical reaction and cross-linking network density during sintering, the appropriate value of the free cross-linking ratio and reasonable control of the cross-linking network are beneficial for reducing the loss of the main chain element and C element, alleviating the sintering stress, and thus obtaining qualified pressureless sintered bulk ceramic samples.

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Stable anodes for lithium-ion batteries based on tin-containing silicon oxycarbonitride ceramic nanocomposites

Cited by 15 publications

References 46 publications

Bridged polysilsesquioxane‐derived SiOCN ceramic aerogels for microwave absorption

Bridged polysilsesquioxane‐derived SiOCN ceramic aerogels for microwave absorption

Magnesium‐Ion Battery Anode from Polymer‐Derived SiOC Nanobeads

Effect of Free Cross-Linking Rate on the Molding of Bulk SiOC Ceramics

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