Lithium Ion Battery Peformance of Silicon Nanowires with Carbon Skin

Bogart, Timothy D.; Oka, Daichi; Lu, Xiufen; Gu, Meng; Wang, Chongmin; Korgel, Brian A.

doi:10.1021/nn405710w

Cited by 196 publications

(184 citation statements)

References 63 publications

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“…Some coating materials, such as Al 2 O 3 , 43,108,109 function as a passivation layer, which suppresses unwanted chemical reactions between electrodes and electrolytes, and subsequently prevents wasting Li sources in the electrolyte. Conductive coatings such as carbon, [110][111][112][113][114][115][116][117][118][119][120] metals, [121][122][123] and conductive polymers 43,[124][125][126][127] can enhance the redox reaction kinetics and improve the current collection efficiency. Surface coatings can also prevent electrochemical welding between particles of active materials.…”

Section: Strategies For Mitigating the Electrochemo-mechanical Degradmentioning

confidence: 99%

Chemomechanical modeling of lithiation-induced failure in high-volume-change electrode materials for lithium ion batteries

Zhang

2017

npj Comput Mater

101

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The rapidly increasing demand for efficient energy storage systems in the last two decades has stimulated enormous efforts to the development of high-capacity, high-power, durable lithium ion batteries. Inherent to the high-capacity electrode materials is material degradation and failure due to the large volumetric changes during the electrochemical cycling, causing fast capacity decay and low cycle life. This review surveys recent progress in continuum-level computational modeling of the degradation mechanisms of high-capacity anode materials for lithium-ion batteries. Using silicon (Si) as an example, we highlight the strong coupling between electrochemical kinetics and mechanical stress in the degradation process. We show that the coupling phenomena can be tailored through a set of materials design strategies, including surface coating and porosity, presenting effective methods to mitigate the degradation. Validated by the experimental data, the modeling results lay down a foundation for engineering, diagnosis, and optimization of high-performance lithium ion batteries.

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Section: Strategies For Mitigating the Electrochemo-mechanical Degradmentioning

confidence: 99%

Chemomechanical modeling of lithiation-induced failure in high-volume-change electrode materials for lithium ion batteries

Zhang

2017

npj Comput Mater

101

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“…The anisotropic lithiation behavior of Si was also highlighted in this study, as the cross-section of the NWs changed from circular to dumbbell shaped; the largest expansion occurs in h110i directions, while the smallest expansion occurs along h111i. More recent work has also related the presence of a carbon ''skin'' or shell on Si NWs to a reduction in the total volume expansion experienced by the wires during lithiation [26].…”

Section: Background Reviewmentioning

confidence: 99%

TEM in situ lithiation of tin nanoneedles for battery applications

et al. 2015

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Materials such as tin (Sn) and silicon that alloy with lithium (Li) have attracted renewed interest as anode materials in Li-ion batteries. Although their superior capacity to graphite and other intercalation materials has been known for decades, their mechanical instability due to extreme volume changes during cycling has traditionally limited their commercial viability. This limitation is changing as processes emerge that produce nanostructured electrodes. The nanostructures can accommodate the repeated expansion and contraction as Li is inserted and removed without failing mechanically. Recently, one such nano-manufacturing process, which is capable of depositing coatings of Sn ''nanoneedles'' at low temperature with no template and at industrial scales, has been described. The present work is concerned with observations of the lithiation and delithiation behavior of these Sn nanoneedles during in situ experiments in the transmission electron microscope, along with a brief review of how in situ TEM experiments have been used to study the lithiation of Lialloying materials. Individual needles are successfully lithiated and delithiated in solid-state half-cells against a Li-metal counter-electrode. The microstructural evolution of the needles is discussed, including the transformation of one needle from single-crystal Sn to polycrystalline Sn-Li and back to single-crystal Sn.

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“…For full cell operation, also the formation of the solid-electrolyte interface (SEI) at the silicon surface needs to be controlled, in order to tune the electrochemical reactions. Again, the flexibility in forming heterostructures including different materials can be utilized to enhance charge storage batteries [139,140].…”

Section: Silicon Nanowire Based Sensorsmentioning

confidence: 99%

Silicon Nanowires: Fabrication and Applications

Mikolajick

Weber

2015

NanoScience and Technology

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Due to the high surface to volume silicon ratio and unique quasi onedimensional electronic structure, silicon nanowire based devices have properties that can outperform their traditional counterparts in many ways. To fabricate silicon nanowires, in principle there are a variety of different approaches. These can be classified into top-down and bottom-up methods. The choice of fabrication method is strongly linked to the target application. From an application point of view, electron devices based on silicon nanowires are a natural extension of the downscaling of a silicon metal insulator semiconductor transistor. However, the unique properties also allow implementing new device concepts like the junctionless transistor and new functionalities like reconfigurability on the device level. Sensor devices may benefit from the high surface to volume ratio leading to a very high sensitivity of the device. Also, solar cells and anodes in Li-ion batteries can be improved by exploiting the quasi one-dimensionality. This chapter will give a review on the state-of-the-art of silicon nanowire fabrication and their application in different types of devices.

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Lithium Ion Battery Peformance of Silicon Nanowires with Carbon Skin

Cited by 196 publications

References 63 publications

Chemomechanical modeling of lithiation-induced failure in high-volume-change electrode materials for lithium ion batteries

Chemomechanical modeling of lithiation-induced failure in high-volume-change electrode materials for lithium ion batteries

TEM in situ lithiation of tin nanoneedles for battery applications

Silicon Nanowires: Fabrication and Applications

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