The crystal structural evolution of nano-Si anode caused by lithium insertion and extraction at room temperature

Li, Hong; Huang, Xuejie; Chen, Liquan; Zhou, Guangwen; Zhang, Ze; Yu, Dapeng; Mo, Yu Jun; Pei, Ning

doi:10.1016/s0167-2738(00)00362-3

Cited by 417 publications

(199 citation statements)

References 18 publications

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“…37−39 A second possibility is that the volume expansion of the SiNW during lithium insertion may also break the SiO x layer, thereby enabling direct contact between the interfacial host atoms. 24,26,40 This explains the Li−Si bonding and corresponding phase changes at the interface of the crossed SiNW system.…”

mentioning

confidence: 84%

“…To date, there have only been a few post-mortem studies suggesting the occurrence of bonding and coalescence of nanomaterials in lithium battery electrodes. 23−27 For example, Li et al 24 report the coalescence of Si nanoparticles from TEM images of cycled and dismantled composite electrodes. However, direct evidence and a detailed understanding of the process are both still lacking.…”

mentioning

confidence: 99%

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Lithium-Assisted Electrochemical Welding in Silicon Nanowire Battery Electrodes

et al. 2012

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From in situ transmission electron microscopy (TEM) observations, we present direct evidence of lithiumassisted welding between physically contacted silicon nanowires (SiNWs) induced by electrochemical lithiation and delithiation. This electrochemical weld between two SiNWs demonstrates facile transport of lithium ions and electrons across the interface. From our in situ observations, we estimate the shear strength of the welded region after delithiation to be approximately 200 MPa, indicating that a strong bond is formed at the junction of two SiNWs. This welding phenomenon could help address the issue of capacity fade in nanostructured silicon battery electrodes, which is typically caused by fracture and detachment of active materials from the current collector. The process could provide for more robust battery performance either through self-healing of fractured components that remain in contact or through the formation of a multiconnected network architecture.

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confidence: 84%

mentioning

confidence: 99%

Lithium-Assisted Electrochemical Welding in Silicon Nanowire Battery Electrodes

et al. 2012

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“…The remaining lithium ions can not be completely extracted from nanosized silicon by electrochemical method and act as the main resource of irreversible capacity loss. 22 This is one of the main factors for the capacity fading during cycling.…”

Section: Methodsmentioning

confidence: 99%

Effect of Carbon-coated Silicon/Graphite Composite Anode on the Electrochemical Properties

2008

Bulletin of the Korean Chemical Society

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The effects of carbon-coated silicon/graphite (Si/Gr.) composite anode on the electrochemical properties were investigated. The nanosized silicon particle shows a good cycling performance with a reasonable value of the first reversible capacity as compared with microsized silicon particle. The carbon-coated silicon/graphite composite powders have been prepared by pyrolysis method under argon/10 wt% propylene gas flow at 700 o C for 7 h. Transmission electron microscopy (TEM) analysis indicates that the carbon layer thickness of 5 nm was coated uniformly onto the surface silicon powder. It is confirmed that the insertion of lithium ions change the crystalline silicon phase into the amorphous phase by X-ray diffraction (XRD) analysis. The carbon-coated composite silicon/graphite anode shows excellent cycling performance with a reversible value of 700 mAh/g. The superior electrochemical characteristics are attributed to the enhanced electronic conductivity and low volume change of silicon powder during cycling by carbon coating.

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“…Recently, various oxides such as lithium manganese-based oxides, lithium trivanadate (LiV3O8), nanostructured silicon materials [17][18][19][20][21][22][23][24][25][26][27], carbon materials such as graphite, carbon nanotubes (CNTs) and other materials are considered to be promising materials for large-scale production due to their environmental benignity, safety, good rate capability and cost-effective application for rechargeable LIBs. However, for lithium manganese-based oxides, such as spinel LiMn2−xNixO4 (0<x≤0.5) cathode oxides, the high operating voltage (~4.7 V) always results in serious electrolyte decomposition and a thick solid-electrolyte interphase (SEI) layer on the electrode surface with weak electronic and lithium conductivity [28][29][30][31][32].…”

Section: Al2o3mentioning

confidence: 99%

Aluminum-based materials for advanced battery systems

Qiu

Zhao

et al. 2017

Sci. China Mater.

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There has been increasing interest in developing micro/nanostructured aluminum-based materials for sustainable, dependable and high-efficiency electrochemical energy storage. This review chiefly discusses the aluminum-based electrode materials mainly including Al2O3, AlF3, AlPO4, Al(OH)3, as well as the composites (carbons, silicons, metals and transition metal oxides) for lithium-ion batteries, the development of aluminum-ion batteries, and nickel-metal hydride alkaline secondary batteries, which summarizes the methodologies, related charge-storage mechanisms, the relationship between nanostructures and electrochemical properties found in recent years, latest research achievements and their potential applications. In addition, we raise the relevant challenges in recently developed electrode materials and put forward new ideas for further development of micro/nanostructured aluminum-based materials in advanced battery systems.

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The crystal structural evolution of nano-Si anode caused by lithium insertion and extraction at room temperature

Cited by 417 publications

References 18 publications

Lithium-Assisted Electrochemical Welding in Silicon Nanowire Battery Electrodes

Lithium-Assisted Electrochemical Welding in Silicon Nanowire Battery Electrodes

Effect of Carbon-coated Silicon/Graphite Composite Anode on the Electrochemical Properties

Aluminum-based materials for advanced battery systems

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