Nano-alloy anode for lithium ion batteries

Li, Hong; Shi, Lihong; Wang, Qing; Chen, Liquan; Huang, Xiaohua

doi:10.1016/s0167-2738(02)00061-9

Cited by 165 publications

(121 citation statements)

References 16 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.…”

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confidence: 85%

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: 85%

Lithium-Assisted Electrochemical Welding in Silicon Nanowire Battery Electrodes

et al. 2012

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“…For example, nano-SnSb undergoes successive agglomeration during Li insertion and extraction, which consequently leads to quick capacity fading. [16] …”

Section: Low Thermodynamic Stabilitymentioning

confidence: 99%

Nanostructured Materials for Electrochemical Energy Conversion and Storage Devices

2008

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One of the greatest challenges for our society is providing powerful electrochemical energy conversion and storage devices. Rechargeable lithium‐ion batteries and fuel cells are amongst the most promising candidates in terms of energy densities and power densities. Nanostructured materials are currently of interest for such devices because of their high surface area, novel size effects, significantly enhanced kinetics, and so on. This Progress Report describes some recent developments in nanostructured anode and cathode materials for lithium‐ion batteries, addressing the benefits of nanometer‐size effects, the disadvantages of ‘nano’, and strategies to solve these issues such as nano/micro hierarchical structures and surface coatings, as well as developments in the discovery of nanostructured Pt‐based electrocatalysts for direct methanol fuel cells (DMFCs). Approaches to lowering the cost of Pt catalysts include the use of i) novel nanostructures of Pt, ii)new cost‐effective synthesis routes, iii) binary or multiple catalysts, and iv) new catalyst supports.

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“…This undesired reaction under ambient exposure is known to be more pronounced for smaller particles because of their increased surface/exposure area, and can result in spontaneous lithium and surface oxidation [70]. It has also been revealed that nanostructured electrode materials with poor adherence to the current collector will agglomerate during cycling; nano-SnSb undergoes successive agglomeration during Li-ion insertion and extraction, and experiences quick capacity fade as a result [71]. Inactive LiMO y phases with transition metal cations of lower oxidation are formed from redox reactions with solution species [54]; moreover, these compounds can be spontaneously delithiated under ambient conditions involving reactions with CO 2 [72].…”

Section: Shortcomings Of Nanostructured Electrodesmentioning

confidence: 99%

Microstructurally Composed Nanoparticle Assemblies as Electroactive Materials for Lithium-Ion Battery Electrodes

Uchaker

Cao

2015

Rechargeable Batteries

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Lithium-ion batteries are a well-established technology that has seen steady gains in performance based on materials chemistry as well as microstructure design and assembly over the past several decades. There are many material selections available when designing and assembling the device such as electro-active species, additives, and particle size/morphology to name a few. Many of the research proclamations focusing on the advantages of nanosized electrodes have yet to find commercial application, and considerable improvements in energy density and stability are still necessary in order to achieve energy storage parity. Therefore, the design and use of kinetically stabilized nanostructures should be considered. Over the past several years, significant studies have been conducted examining the synthesis and performance of heterogeneous structures. While heterogeneous structures typically refer to the combination of two or more materials, in this case it refers to architectures displaying more than one size scale (i.e., micro/nano). A great deal of recent efforts have focused on the formation and understanding of nanoparticle superstructures with a vast range of architectures. The design of microstructurally composed nanoparticle assemblies would, for instance, possess the

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Nano-alloy anode for lithium ion batteries

Cited by 165 publications

References 16 publications

Lithium-Assisted Electrochemical Welding in Silicon Nanowire Battery Electrodes

Lithium-Assisted Electrochemical Welding in Silicon Nanowire Battery Electrodes

Nanostructured Materials for Electrochemical Energy Conversion and Storage Devices

Microstructurally Composed Nanoparticle Assemblies as Electroactive Materials for Lithium-Ion Battery Electrodes

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