Two-dimensional silicon suboxides nanostructures with Si nanodomains confined in amorphous SiO2 derived from siloxene as high performance anode for Li-ion batteries

Fu, Rusheng; Zhang, Keli; Zaccaria, Remo Proietti; Huang, Heran; Xia, Yonggao; Liu, Zhaoping

doi:10.1016/j.nanoen.2017.07.040

Cited by 120 publications

(89 citation statements)

References 33 publications

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“…After 600 cycles consisting of 20 pre‐cycling at 0.1 A g −1 followed by fast cycling at 1 A g −1 , the SiO x –TiO 2 @C electrode exhibits a stable reversible capacity of ≈700 mAh g −1 without any obvious degradation, demonstrating outstanding long‐term cyclability at high rate condition. Compared with the reported SiO x ‐based anodes prepared by wet‐chemistry routes recently (Table S1, Supporting Information), the prepared SiO x –TiO 2 @C electrode shows high specific capacity and superior rate capability. The excellent electrochemical performance suggests a great promise of the proposed particle architecture.…”

Section: Resultsmentioning

confidence: 78%

Watermelon‐Like Structured SiO_x–TiO₂@C Nanocomposite as a High‐Performance Lithium‐Ion Battery Anode

Zhao

et al. 2018

Adv Funct Materials

194

100

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A unique watermelon-like structured SiO x -TiO 2 @C nanocomposite is synthesized by a scalable sol-gel method combined with carbon coating process. Ultrafine TiO 2 nanocrystals are uniformly embedded inside SiO x particles, forming SiO x -TiO 2 dual-phase cores, which are coated with outer carbon shells. The incorporation of TiO 2 component can effectively enhance the electronic and lithium ionic conductivities inside the SiO x particles, release the structure stress caused by alloying/dealloying of Si component and maximize the capacity utilization by modifying the Si-O bond feature and decreasing the O/Si ratio (x-value). The synergetic combination of these advantages enables the synthesized SiO x -TiO 2 @C nanocomposite to have excellent electrochemical performances, including high specific capacity, excellent rate capability, and stable long-term cycleability. A stable specific capacity of ≈910 mAh g −1 is achieved after 200 cycles at the current density of 0.1 A g −1 and ≈700 mAh g −1 at 1 A g −1 for over 600 cycles. These results suggest a great promise of the proposed particle architecture, which may have potential applications in the improvement of various energy storage materials.

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Section: Resultsmentioning

confidence: 78%

Watermelon‐Like Structured SiO_x–TiO₂@C Nanocomposite as a High‐Performance Lithium‐Ion Battery Anode

Zhao

et al. 2018

Adv Funct Materials

194

100

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“…The thickness of the cycled p‐SiNSs@C‐2 electrode was only increased from 12 to 16.2 um with a swelling of 35% (Figure S7a,c, Supporting Information). However, the p‐SiNSs electrode exhibits a larger swelling rate of 51.6 %, thus leading to the large electrical contact loss and rapid performance fading (Figure S6b,d, Supporting Information) . As shown in Figure c,f, the spherical morphology of p‐SiNSs@C‐2 could be well preserved after 100 cycles at 1 A g −1 .…”

Section: Resultsmentioning

confidence: 99%

Catalytic Growth of Graphitic Carbon‐Coated Silicon as High‐Performance Anodes for Lithium Storage

Shi

Nie

et al. 2019

Energy Tech

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Although silicon is considered as one of the most promising anode materials in next‐generation lithium‐ion batteries, large volumetric expansion during cycling hampers its practical application. The fabrication of silicon/carbon composites is an effective way to improve electrical conductivity and inhibit electroactive material delaminating from the current collector. Herein, a graphitic carbon‐coated porous silicon nanospheres (p‐SiNSs@C) composite is prepared through a chemical vapor deposition (CVD) technique by using the magnesiothermic reduction by‐product MgO as a template and catalyst. With the template of in situ generation of MgO, the p‐SiNSs@C material is obtained in a very short time. Due to the graphitic carbon shell and porous structure inside the silicon nanospheres, the obtained p‐SiNSs@C, with 8 min carbon growing time (p‐SiNSs@C‐2), deliver a high initial reversible capacity of 2220 mAh g−1 at 0.1 A g−1 and respectable rate capability. Furthermore, the p‐SiNSs@C‐2//LiCoO2 Li‐ion full cell displays a high energy density of ≈409 Wh kg−1 and good cycling performance. The high performance of the p‐SiNSs@C‐2 composite can be attributed to the synergistic effect of nanoscale‐sized Si, porous structure, and stable carbon shell.

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“…Figure a exhibits the core‐level spectrum of Si 2p states of the siloxene nanosheets. In order to confirm the oxidation states of siloxene nanosheets, the Si 2p spectrum can be fitted into five peaks with binding energy between 99.3 and 103.5 eV, attributed to Si 0 , Si 1+ , Si 2+ , Si 3+ , and Si 4+ 39,40. The results of XPS fitting also indicate that the chemical states of Si in the resultant siloxene distinguish from the one in bulk SiO 2 (Si 4+ ).…”

Section: Resultsmentioning

confidence: 99%

Highly Stable Lithium−Sulfur Batteries Promised by Siloxene: An Effective Cathode Material to Regulate the Adsorption and Conversion of Polysulfides

Wang

Zhou

Huang

et al. 2020

Adv Funct Materials

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Designing an appropriate cathode is still a challenge for lithium–sulfur batteries (LSBs) to overcome the polysulfides shuttling and sluggish redox reactions. Herein, 2D siloxene nanosheets are developed by a rational wet‐chemistry exfoliation approach, from which S@siloxene@graphene (Si/G) hybrids are constructed as cathodes in Li‐S cells. The siloxene possesses corrugated 2D Si backbone with abundant O grafted in Si6 rings and hydroxyl‐functionalized surface, which can effectively intercept polysulfides via synergistic effects of chemical trapping capability and kinetically enhanced polysulfides conversion. Theoretical analysis further reveals that siloxene can significantly elevate the adsorption energies and lower energy barrier for Li+ diffusion. The LSBs assembled with 2D Si/G hybrid cathodes exhibit greatly enhanced rate performance (919, 759, and 646 mAh g−1 at 4 C with sulfur loading of 1, 2.9, and 4.2 mg cm−2, respectively) and superb durability (demonstrated by 1000 cycles with an initial capacity of 951 mAh g−1 and negligible 0.032% decay rate at 1 C with sulfur loading of 4.2 mg cm−2). It is expected that the study presented here may open up a new vision toward developing high‐performance LSBs with siloxene for practical applications.

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Two-dimensional silicon suboxides nanostructures with Si nanodomains confined in amorphous SiO2 derived from siloxene as high performance anode for Li-ion batteries

Cited by 120 publications

References 33 publications

Watermelon‐Like Structured SiO_x–TiO₂@C Nanocomposite as a High‐Performance Lithium‐Ion Battery Anode

Watermelon‐Like Structured SiO_x–TiO₂@C Nanocomposite as a High‐Performance Lithium‐Ion Battery Anode

Catalytic Growth of Graphitic Carbon‐Coated Silicon as High‐Performance Anodes for Lithium Storage

Highly Stable Lithium−Sulfur Batteries Promised by Siloxene: An Effective Cathode Material to Regulate the Adsorption and Conversion of Polysulfides

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Two-dimensional silicon suboxides nanostructures with Si nanodomains confined in amorphous SiO2 derived from siloxene as high performance anode for Li-ion batteries

Cited by 120 publications

References 33 publications

Watermelon‐Like Structured SiOx–TiO2@C Nanocomposite as a High‐Performance Lithium‐Ion Battery Anode

Watermelon‐Like Structured SiOx–TiO2@C Nanocomposite as a High‐Performance Lithium‐Ion Battery Anode

Catalytic Growth of Graphitic Carbon‐Coated Silicon as High‐Performance Anodes for Lithium Storage

Highly Stable Lithium−Sulfur Batteries Promised by Siloxene: An Effective Cathode Material to Regulate the Adsorption and Conversion of Polysulfides

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Product

Resources

About

Watermelon‐Like Structured SiO_x–TiO₂@C Nanocomposite as a High‐Performance Lithium‐Ion Battery Anode

Watermelon‐Like Structured SiO_x–TiO₂@C Nanocomposite as a High‐Performance Lithium‐Ion Battery Anode