Search

Direct Visualization of Solid Electrolyte Interphase Formation in Lithium-Ion Batteries with In Situ Electrochemical Transmission Electron Microscopy
Raymond R. Unocic, Xiao-Guang Sun, Robert L. Sacci, Leslie A. Adamczyk, Daan Hein Alsem, Sheng Dai, Nancy J. Dudney, Karren L. More
Journal:

Microscopy and Microanalysis / Volume 20 / Issue 4 / August 2014

Published online by Cambridge University Press:

04 July 2014, pp. 1029-1037

Print publication:

August 2014
- Article
- - Get access
    
    Check if you have access via personal or institutional login
    
    Log in Register
- Export citation
Complex, electrochemically driven transport processes form the basis of electrochemical energy storage devices. The direct imaging of electrochemical processes at high spatial resolution and within their native liquid electrolyte would significantly enhance our understanding of device functionality, but has remained elusive. In this work we use a recently developed liquid cell for in situ electrochemical transmission electron microscopy to obtain insight into the electrolyte decomposition mechanisms and kinetics in lithium-ion (Li-ion) batteries by characterizing the dynamics of solid electrolyte interphase (SEI) formation and evolution. Here we are able to visualize the detailed structure of the SEI that forms locally at the electrode/electrolyte interface during lithium intercalation into natural graphite from an organic Li-ion battery electrolyte. We quantify the SEI growth kinetics and observe the dynamic self-healing nature of the SEI with changes in cell potential.

Quantitative Electrochemical Measurements Using In Situ ec-S/TEM Devices
Raymond R. Unocic, Robert L. Sacci, Gilbert M. Brown, Gabriel M. Veith, Nancy J. Dudney, Karren L. More, Franklin S. Walden II, Daniel S. Gardiner, John Damiano, David P. Nackashi
Journal:

Microscopy and Microanalysis / Volume 20 / Issue 2 / April 2014

Published online by Cambridge University Press:

11 March 2014, pp. 452-461

Print publication:

April 2014
- Article
- - Get access
    
    Check if you have access via personal or institutional login
    
    Log in Register
- Export citation
Insight into dynamic electrochemical processes can be obtained with in situ electrochemical-scanning/transmission electron microscopy (ec-S/TEM), a technique that utilizes microfluidic electrochemical cells to characterize electrochemical processes with S/TEM imaging, diffraction, or spectroscopy. The microfluidic electrochemical cell is composed of microfabricated devices with glassy carbon and platinum microband electrodes in a three-electrode cell configuration. To establish the validity of this method for quantitative in situ electrochemistry research, cyclic voltammetry (CV), choronoamperometry (CA), and electrochemical impedance spectroscopy (EIS) were performed using a standard one electron transfer redox couple [Fe(CN)6]3−/4−-based electrolyte. Established relationships of the electrode geometry and microfluidic conditions were fitted with CV and chronoamperometic measurements of analyte diffusion coefficients and were found to agree with well-accepted values that are on the order of 10−5 cm2/s. Influence of the electron beam on electrochemical measurements was found to be negligible during CV scans where the current profile varied only within a few nA with the electron beam on and off, which is well within the hysteresis between multiple CV scans. The combination of experimental results provides a validation that quantitative electrochemistry experiments can be performed with these small-scale microfluidic electrochemical cells provided that accurate geometrical electrode configurations, diffusion boundary layers, and microfluidic conditions are accounted for.

TEM Specimen Preparation of Thin Interfacial Coatings on Continuous Ceramic Fibers Using the Focused Ion Beam (FIB) Technique
Dorothy W. Coffey, Karren L. More, Tracie Brummett
Journal:

Microscopy and Microanalysis / Volume 10 / Issue S02 / August 2004

Published online by Cambridge University Press:

01 August 2004, pp. 1160-1161

Print publication:

August 2004
- Article
- - Get access
    
    Check if you have access via personal or institutional login
    
    Log in Register
- Export citation
Extended abstract of a paper presented at Microscopy and Microanalysis 2004 in Savannah, Georgia, USA, August 1–5, 2004.

Search Results

Refine search

Refine search

Actions for selected content:

27 results

Electromagnetic Field Reconstructions of 4D-STEM Datasets using Ptychography and Differential Phase Contrast Imaging

Interpreting Voids in Atom Probe Tomography Data via Experiment and Theory

Investigating Effects of Alloy Chemical Complexity on Helium Bubble Formation by Accurate Segregation Measurements Using Atom Probe Tomography

Resolving Active Sites in Atomically Dispersed Electrocatalysts for Energy Conversion Applications

In situ Nanoscale Imaging and Spectroscopy of Energy Storage Materials

Electron Tomography of PEM Fuel Cell Catalyst Coarsening on Alternate Carbon Supports

Overcoming the Challenges of Beam-sensitivity in Fuel Cell Electrodes

11 - Application of Electrochemical Liquid Cells for Electrical Energy Storage and Conversion Studies

Data Analytics Applied to Chemical Transformations in Liquids

Atom Probe Tomography of Interfacial Segregation in CdTe-based Solar Cells

Quantification of Atomic Arrangements at Heterostructure Interfaces

Evolution of Au25(SR)18Nanoclusters on Ceria Surfaces during in situ Electron Beam Irradiation

A “Hidden” Mesoscopic Feature Revealed By Electron Microscopy Could Facilitate Ion Transport In Solid Electrolytes

In situ Electrochemical TEM for Quantitative Nanoscale Imaging Dynamics of Solid Electrolyte Interphase and Lithium Electrodeposition

Tuning Electrodeposition Parameters for Tailored Nanoparticle Size, Shape, and Morphology: An In Situ ec-STEM Investigation

In operando Transmission Electron Microscopy Imaging of SEI Formation and Structure in Li-Ion and Li-Metal Batteries

Novel Method for Precision Controlled Heating of TEM Thin Sections to Study Reaction Processes

Direct Visualization of Solid Electrolyte Interphase Formation in Lithium-Ion Batteries with In Situ Electrochemical Transmission Electron Microscopy

Quantitative Electrochemical Measurements Using In Situ ec-S/TEM Devices

TEM Specimen Preparation of Thin Interfacial Coatings on Continuous Ceramic Fibers Using the Focused Ion Beam (FIB) Technique

Search Results

Refine search

Refine search

Actions for selected content:

Save Search

27 results