Miniature all-solid-state heterostructure nanowire Li-ion batteries as a tool for engineering and structural diagnostics of nanoscale electrochemical processes.

Published

August 15, 2014

Author(s)

Vladimir P. Oleshko, Thomas F. Lam, Dmitry A. Ruzmetov, Paul M. Haney, Henri J. Lezec, Albert Davydov, Sergiy Krylyuk, John Cumings, Albert A. Talin

Abstract

Complex interfacial phenomena and phase transformations that govern the operation of Li-ion batteries (LiBs) require detailed nanoscale 3D structural and compositional characterization that can be directly related to the capacity and electrical transport properties. For this purpose, we have used miniature all solid state radial heterostructure LiBs composed LiCoO_(2) cathode, LiPON electrolyte and amorphous Si anode shells, which were deposited around metallized high aspect ration <111> Si nanowires (NWs) as a scaffolding core. Such diagnostic NW-LiBs designed for electrical testing in a field-emission scanning electron microscope and/or scanning/transmission electron microscope allow correlation of electrochemical properties tailored for specific performance with their structural evolution during cycling being analyzed in various imaging, diffraction and spectroscopie modes down to the atomic level. Employing multimode analytical S/TEM imaging coupled with correlative multivariate statistical analysis nad tomography, we have analyzed and quantified the 3D morphological and structural arrangement of the NW-LiBs, including textured platelet-like LiCoO_(2) nanocrystallites, buried electrode-electrolyte interfaces and hidden internal defects to clarify effects of scaling on the LiB's electrochemical performance. Illustrating the importance of metal substrate/electrode and electrolyte layers interactions, these findings provide useful guidelines for engineering of prospective nano-sized building blocks in future electrochemical energy storage systems.

Citation

Nanoscale

Volume

6

Pub Type

Journals

Citation

Oleshko, V. , Lam, T. , Ruzmetov, D. , Haney, P. , Lezec, H. , Davydov, A. , Krylyuk, S. , Cumings, J. and Talin, A. (2014), Miniature all-solid-state heterostructure nanowire Li-ion batteries as a tool for engineering and structural diagnostics of nanoscale electrochemical processes., Nanoscale (Accessed October 6, 2024)