In Situ Artificial Hybrid SEI Layer Enabled High‐Performance Prelithiated SiO<i><sub>x</sub></i> Anode for Lithium‐Ion Batteries

Sun, Yi; Zhang, Kuanxin; Chai, Ruijuan; Wang, Yueda; Rui, Xianhong; Wang, Kang; Deng, Huaxia; Xiang, Hongfa

doi:10.1002/adfm.202303020

Cited by 19 publications

(10 citation statements)

References 62 publications

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“…Improved charge transfer and lithium diffusion are also observed for Si@SiO x /C‐0.05 (Figure S28a, Supporting Information), Si@SiO x /C‐0.2 (Figure S28c, Supporting Information), SiO x /C (Figure S28e, Supporting Information), and Si@SiO x (Figure S28f, Supporting Information). The improved charge transfer and Li + diffusion kinetic should be ascribed to the generation of lithium silicate during lithiation [ 45 ] and the lithiation of carbon. The charge transfer and lithium diffusion of the samples containing SiO x /C are in sharp contrast with the case of bare Si NPs (Figure S28d, Supporting Information), providing evidence for the fast lithium transfer pathways enabled by the SiO x /C coating.…”

Section: Resultsmentioning

confidence: 99%

Regulating Lithium Transfer Pathway to Avoid Capacity Fading of Nano Si Through Sub‐Nano Scale Interfused SiO_x/C Coating

Yu,

Pan,

Jiang

et al. 2023

Advanced Materials

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Si nanoparticles (NPs) are considered as a promising high‐capacity anode material owing to their ability to prevent mechanical failure from drastic volume change during (de)lithiation. However, upon cycling, a quick capacity fading is still observed for Si NPs, and the underlying mechanism remains elusive. In this contribution, it is demonstrated that the quick capacity fading is mainly caused by the generation of dead (electrochemically inert) Si with blocked electron conductivity in a densely composited Si/SEI (solid electrolyte interface) hybrid. This is due to the combined influence of electrolyte‐related side reactions and the accompanied agglomeration of Si NPs. A compact, sub‐nano scale interfused SiOx/C composite coating onto the Si NPs is constructed, and a highly stabilized electrochemistry is achieved upon long cycling. The SiOx/C coating with electron/ion dual transport paths and robust mechanical flexibility enables a fast and stable lithium ion/electron dual diffusion pathway towards the encapsulated Si. With fast reaction kinetics, stable SEI, and an antiagglomeration feature, the obtained Si@SiOx/C composite demonstrates a stable high capacity. This work unravels new perspectives on the capacity fading of Si NPs and provides an effective encapsulating method to remedy the structure degradation and capacity fading of nano Si.

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Section: Resultsmentioning

confidence: 99%

Regulating Lithium Transfer Pathway to Avoid Capacity Fading of Nano Si Through Sub‐Nano Scale Interfused SiO_x/C Coating

Yu,

Pan,

Jiang

et al. 2023

Advanced Materials

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“…Artificial SEI layers are an alternative, which avoid initial metal consumption required to form the SEI [12,126,131–132] . Artificial SEIs are commonly based on species found in conventional SEIs, which for Li and Na batteries is often halide salts owing to their high ionic conductivity and mechanical hardness which may supress dendrites [127,132,134] . However, other artificial SEIs which capitalise on the freedom offered by external synthesis use alternative materials such as silica, polymers, and alloys [135–137] .…”

Section: Battery Component Modifications According To the Modelsmentioning

confidence: 99%

A Deeper Understanding of Metal Nucleation and Growth in Rechargeable Metal Batteries Through Theory and Experiment

Cooper,

Li,

Gentle

et al. 2023

Angew Chem Int Ed

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Lithium and sodium metal batteries continue to occupy the forefront of battery research. Their exceptionally high energy density and nominal voltages are highly attractive for cutting‐edge energy storage applications. Anode‐free metal batteries are also coming into the research spotlight offering improved safety and even higher energy densities than conventional metal batteries. However, uneven metal nucleation and growth which leads to dendrites continues to limit the commercialisation of conventional and anode‐free metal batteries alike. This review connects models and theories from well‐established fields in metallurgy and electrodeposition to both conventional and anode‐free metal batteries. These highly applicable models and theories explain the driving forces of uneven metal growth and can inform future experiment design. Finally, the models and theories that are most relevant to each anode‐related cell component are identified. Keeping these specific models and theories in mind will assist with rational design for these components.

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“…Therefore, prelithiation is considered to be an effective way to solve the above problems. By prelithiation, the high capacity irreversibility of Li-ion batteries can be effectively solved and the cycling stability can be improved. − …”

Section: Introductionmentioning

confidence: 99%

Improving the Cycle Performance of Porous Schiff-Base Polymer Electrode Materials in Lithium-Ion Batteries by Prelithiation

Zou,

Zhang,

Chen

et al. 2023

ACS Appl. Energy Mater.

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Organic polymers have been investigated as anode materials of lithium-ion batteries owing to their tunable structure and high capacity. However, the formation of a solid electrolyte interface (SEI) layer in the first circle results in an excessive loss of lithium, leading to poor cycling performance. In this paper, the porous Schiff base polymer (SNW) is prelithiated, and the active lithium is added to the anode material by a redox reaction, which can compensate for the lithium loss caused by SEI film formation. After modification, the specific surface area of the product (SNW@LiH) is reduced and the reversibility is increased, thus improving the cycle performance. For the pristine SNW, the specific capacity decays to 266 mA h g −1 after 1000 cycles at a current density of 1 A g −1 ; while prelithiated SNW reaches a capacity of 588 mA h g −1 after 1000 cycles. The kinetics and reversibility of the polymer are also analyzed to elucidate the effect of prelithiation treatment on the electrode material, providing for a way to improve the cycling performance and reversibility of the reaction in lithium-ion batteries.

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In Situ Artificial Hybrid SEI Layer Enabled High‐Performance Prelithiated SiO_x Anode for Lithium‐Ion Batteries

Cited by 19 publications

References 62 publications

Regulating Lithium Transfer Pathway to Avoid Capacity Fading of Nano Si Through Sub‐Nano Scale Interfused SiO_x/C Coating

Regulating Lithium Transfer Pathway to Avoid Capacity Fading of Nano Si Through Sub‐Nano Scale Interfused SiO_x/C Coating

A Deeper Understanding of Metal Nucleation and Growth in Rechargeable Metal Batteries Through Theory and Experiment

Improving the Cycle Performance of Porous Schiff-Base Polymer Electrode Materials in Lithium-Ion Batteries by Prelithiation

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In Situ Artificial Hybrid SEI Layer Enabled High‐Performance Prelithiated SiOx Anode for Lithium‐Ion Batteries

Cited by 19 publications

References 62 publications

Regulating Lithium Transfer Pathway to Avoid Capacity Fading of Nano Si Through Sub‐Nano Scale Interfused SiOx/C Coating

Regulating Lithium Transfer Pathway to Avoid Capacity Fading of Nano Si Through Sub‐Nano Scale Interfused SiOx/C Coating

A Deeper Understanding of Metal Nucleation and Growth in Rechargeable Metal Batteries Through Theory and Experiment

Improving the Cycle Performance of Porous Schiff-Base Polymer Electrode Materials in Lithium-Ion Batteries by Prelithiation

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Resources

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In Situ Artificial Hybrid SEI Layer Enabled High‐Performance Prelithiated SiO_x Anode for Lithium‐Ion Batteries

Regulating Lithium Transfer Pathway to Avoid Capacity Fading of Nano Si Through Sub‐Nano Scale Interfused SiO_x/C Coating

Regulating Lithium Transfer Pathway to Avoid Capacity Fading of Nano Si Through Sub‐Nano Scale Interfused SiO_x/C Coating