Two-dimensional SiOx/Nitrogen-Doped carbon derived from in situ constructed Siloxene/Polyaniline for robust lithium storage

Sun, Mengru; Fang, Tiantian; Liu, Huibin; Li, Yang; Peng, Wenchao; Zhang, Fengbao; Fan, Xiaobin

doi:10.1016/j.cej.2024.149359

Cited by 6 publications

(1 citation statement)

References 56 publications

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“…The S 2p spectrum (Figure e) has been deconvoluted into three main peaks consisting of 163.4 eV (S–S/S–C), 164.9 eV (S–O), and 168.8 eV (sulfate), indicating a successful doping of the S atom into the carbon coating layer on the Si@C/SN composite. N 1s spectra (Figure f) can be resolved into three main peaks, including the pyridinic N (397.5 eV), pyrrolic N (399.3 eV), and graphitic N (401.1 eV) . In addition, the pyridinic N and pyrrolic N are strongly related to the ability of the electrode material to donate electrons, which can provide abundant Li + storage room for Si@C/SN, while graphite N features a high electrical conductivity for electrode material. , The Si 2p spectrum (Supporting Information Figure S1) has been divided into four peaks consisting of 100.25, 101.52, 102.67, and 103.77 eV, which are assigned to Si, Si–Si, Si–O, and O–Si–O .…”

Section: Resultsmentioning

confidence: 99%

Nano-Silicon Encased in a S, N Co-doped Carbon Shells Anode Delivers High Lithium-Ion Storage Performance

Ma,

Sun,

Zhang

et al. 2024

ACS Sustainable Chem. Eng.

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Nano-silicon (Si) integrating carbonous material has been recognized as a viable approach for restraining the intrinsic serious volume change and enhancing poor conductivity, finally resulting in improved electrochemical properties, including capacity, rate performance, and cycling life-span. Nevertheless, it remains a huge challenge via a straightforward strategy to obtain the homogeneous Si@C composite with an exceptional Li + storage performance. Herein, novel Si integrating a S, N co-doped carbon shell and a graphite composite material (Si@C/SN@Graphite) have been prepared through combining in situ carbon coating with a liquid-phase ball milling method, in which thiourea was used as dopant, poly(ethylene glycols) were used as carbon coating precursor, and graphite was utilized as carbon matrix. The combined effect of the S and N co-doping carbon coating layer and graphite sheet is sufficient to efficiently restrain the serious volume expansion, enhance electronic conductivity, and provide numerous Li + storage rooms for Si anode. Furthermore, the theoretical simulation and electrochemical testing have been carried out to further demonstrate the superiority of the S, N co-doped carbon coating layer. As a result, the as-prepared Si@C/SN anode delivers a notable initial Coulombic efficiency (ICE) of 91%, high reversible capacity of 1213 mAh/g at 2 A/g within 0−1.0 V coupled with 92.8% capacity retention rate for 400 cycles. Moreover, the Si@C/SN@Graphite anode exhibits outstanding reversible capacities of 690 and 379 mAh/g at 0.05 and 1 A/g within 0−2 V along with a 90% capacity retention rate for 500 cycles. Additionally, the full cell assembled by using Si@C/SN@Graphite as anode and LiFePO 4 as cathode presents reversible capacities of 176.5 and 137.9 mAh/g at 0.2 and 3 C, respectively, and considerable ICE of 92% as well as 90% capacity retention for 200 cycles. This work provides a facile and cost-effective strategy for obtaining Si@C composites with exceptional Li-ion storage capabilities in LIBs.

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Section: Resultsmentioning

confidence: 99%

Nano-Silicon Encased in a S, N Co-doped Carbon Shells Anode Delivers High Lithium-Ion Storage Performance

Ma,

Sun,

Zhang

et al. 2024

ACS Sustainable Chem. Eng.

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SiO_x Based Anodes for Advanced Li‐Ion Batteries: Recent Progress and Perspectives

Xie,

Tan,

Shi

et al. 2024

Adv Funct Materials

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SiOx with high theoretical capacity is regarded as a promising high‐performance anode material for lithium‐ion batteries. The main problem is the dramatic volume expansion after lithiation and the inherent poor conductivity. Tackling these problems, extensive strategies are proposed for SiOx‐based anode materials in order to pursue high initial Coulombic efficiency, high reversible capacity, and long cycle stability. In this review, the lithium storage mechanism, merits, and disadvantages of SiOx will be introduced in detail. Significant progress about SiOx in recent years and their detailed strategies are summarized. Finally, challenges and potential solutions in the development and application of SiOx are proposed. This review aims to offer a reference for the research of anode materials associated with SiOx and offer a good guide for the further improvements of SiOx anode materials.

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Hybrid 2D/3D carbon framework confined Si with optimized reaction kinetics for highly stable Li-Ion storage

Lin,

Zhou,

Xiong

et al. 2024

Chemical Engineering Journal

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Two-dimensional SiOx/Nitrogen-Doped carbon derived from in situ constructed Siloxene/Polyaniline for robust lithium storage

Cited by 6 publications

References 56 publications

Nano-Silicon Encased in a S, N Co-doped Carbon Shells Anode Delivers High Lithium-Ion Storage Performance

Nano-Silicon Encased in a S, N Co-doped Carbon Shells Anode Delivers High Lithium-Ion Storage Performance

SiO_x Based Anodes for Advanced Li‐Ion Batteries: Recent Progress and Perspectives

Hybrid 2D/3D carbon framework confined Si with optimized reaction kinetics for highly stable Li-Ion storage

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Two-dimensional SiOx/Nitrogen-Doped carbon derived from in situ constructed Siloxene/Polyaniline for robust lithium storage

Cited by 6 publications

References 56 publications

Nano-Silicon Encased in a S, N Co-doped Carbon Shells Anode Delivers High Lithium-Ion Storage Performance

Nano-Silicon Encased in a S, N Co-doped Carbon Shells Anode Delivers High Lithium-Ion Storage Performance

SiOx Based Anodes for Advanced Li‐Ion Batteries: Recent Progress and Perspectives

Hybrid 2D/3D carbon framework confined Si with optimized reaction kinetics for highly stable Li-Ion storage

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Product

Resources

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SiO_x Based Anodes for Advanced Li‐Ion Batteries: Recent Progress and Perspectives