Lithium-Assisted Electrochemical Welding in Silicon Nanowire Battery Electrodes
Khim Karki,Eric Epstein,Jeong Hyun Cho,Zheng Jia,Teng Li,S. Tom Picraux,Chunsheng Wang,John Cumings +7 more
TLDR
Direct evidence of lithium-assisted welding between physically contacted silicon nanowires (SiNWs) induced by electrochemical lithiation and delithiation is presented, indicating that a strong bond is formed at the junction of two SiNWs.Abstract:
From in situ transmission electron microscopy (TEM) observations, we present direct evidence of lithium-assisted 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.read more
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References
More filters
Journal ArticleDOI
Nanostructured materials for advanced energy conversion and storage devices
Antonino S. Aricò,Peter G. Bruce,Bruno Scrosati,Jean-Marie Tarascon,Jean-Marie Tarascon,Walter van Schalkwijk +5 more
TL;DR: This review describes some recent developments in the discovery of nanoelectrolytes and nanoeLECTrodes for lithium batteries, fuel cells and supercapacitors and the advantages and disadvantages of the nanoscale in materials design for such devices.
Journal ArticleDOI
High-performance lithium battery anodes using silicon nanowires
Candace K. Chan,Hailin Peng,Gao Liu,Kevin McIlwrath,Xiao Feng Zhang,Robert A. Huggins,Yi Cui +6 more
TL;DR: The theoretical charge capacity for silicon nanowire battery electrodes is achieved and maintained a discharge capacity close to 75% of this maximum, with little fading during cycling.
BookDOI
Transmission Electron Microscopy
TL;DR: The client would like to get a larger, approximately 3 cm in diameter, well fixed tissue sample, together with a detailed report of the clinical presentation, gross, and microscopic lesions, along with the submission of samples prepared in a similar manner by the client for processing.
Book
Transmission Electron Microscopy: A Textbook for Materials Science
TL;DR: In this article, the transmission electron microscope (TEM) is used to detect X-ray spectra and images using a combination of parallel-beam diffraction patterns and CBED patterns.
Journal ArticleDOI
Nano- and bulk-silicon-based insertion anodes for lithium-ion secondary cells
TL;DR: In this paper, a review of methodologies adopted for reducing the capacity fade observed in silicon-based anodes, discuss the challenges that remain in using silicon and siliconbased anode, and propose possible approaches for overcoming them.