In Situ and Ex Situ Diagnosis of Nanoscale Electrochemical Processes Using Miniature All-Solid-State Li-Ion Batteries

Oleshko, V.P.; Ruzmetov, Dmitry; Haney, Paul M.; Lezec, Henri J.; Agrawal, Anshuman; Davydov, Albert V.; Krylyuk, Sergiy; Moon, Kyoung-Sook; Bonevich, John E.; Tanase, M.; Talin, A. Alec; Karki, Khim; Baloch, Kamal H.; Cumings, John

doi:10.1017/s143192761200846x

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“…Electron microscopy techniques are widely applied for the determination of structure-property relationships in EES materials by obtaining morphological, crystallographic and local chemical information down to the atomic level. [10][11][12][13][14][15][16][17][18][19][20] S/TEM methods permit real-time examination of various types of batteries during galvanostatic (GS) testing of charge-discharge electrochemical reactions. These methods can additionally probe compression effects and the formation and spatial distribution of the solid-electrolyte-interphase (SEI) under varying processing conditions (temperature, pressure) in situ and ex situ.…”

Section: Introductionmentioning

confidence: 99%

“…The small dimensions enable imaging of the entire NW-LiB in a eldemission SEM (FESEM) and/or S/TEM during electrochemical cycling in a pA range. 18,19 Such approaches involving mini-NW-LiBs can constitute a powerful engineering platform for diagnostics of nanoscale electrochemical processes that offers highly attractive opportunities for:…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2014

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Complex interfacial phenomena and phase transformations that govern the operation of Li-ion batteries require detailed nanoscale 3D structural and compositional characterization that can be directly related to their capacity and electrical transport properties. For this purpose, we have designed model miniature all solid-state radial heterostructure Li-ion batteries composed of LiCoO2 cathode, LiPON electrolyte and amorphous Si anode shells, which were deposited around metallized high-aspect-ratio Si nanowires as a scaffolding core. Such diagnostic batteries, the smallest, complete secondary Li-ion batteries realized to date, were specifically designed for in situ electrical testing in a field-emission scanning electron microscope and/or transmission electron microscope. The results of electrochemical testing were described in detail in a previous publication (Nano Lett., 2012, 12, 505-511). The model Li-ion batteries allow analysis of the correlations between electrochemical properties and their structural evolution during cycling in various imaging, diffraction and spectroscopic modes down to the atomic level. Employing multimode analytical scanning/transmission electron microscopy imaging coupled with correlative multivariate statistical analysis and tomography, we have analyzed and quantified the 3D morphological and structural arrangement of the batteries, including textured platelet-like LiCoO2 nanocrystallites, buried electrode-electrolyte interfaces and hidden internal defects to clarify effects of scaling on a battery's electrochemical performance. Characterization of the nanoscale interfacial processes using model heterostructure nanowire-based Li-ion batteries provides useful guidelines for engineering of prospective nano-sized building blocks in future electrochemical energy storage systems.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2014

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In Situ and Ex Situ Diagnosis of Nanoscale Electrochemical Processes Using Miniature All-Solid-State Li-Ion Batteries

Abstract: Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 – August 2, 2012.

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

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

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