Designing Reliable Operando TEM Experiments to Study (De)lithiation Mechanism of Battery Electrodes

Journal article (2019)

Authors

S. Basak RST/Storage of Electrochemical Energy - AS
S. Ganapathy RST/Technici Pool - AS
Sairam K. Malladi External organisation
Leonardo Vicarelli External organisation
H. Schreuders ChemE/Afdelingsbureau
B. Dam ChemE/Materials for Energy Conversion and Storage - AS
E.M. Kelder RST/Storage of Electrochemical Energy - AS
M. Wagemaker RST/Storage of Electrochemical Energy - AS
H.W. Zandbergen QN/Zandbergen Lab
Research Group
RST/Storage of Electrochemical Energy (AS) (TU Delft)
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Published Date

2019

Language

English

Reuse Rights

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Faculty

Applied Sciences

Department

RST/Radiation, Science and Technology

Research Group

RST/Storage of Electrochemical Energy

Abstract

The unique capability of TEM to resolve the microstructural and chemical evolution of electrode materials during battery operation at high temporal and spatial resolution makes it the method of choice for operando battery experiments. However, the widely used open-cell setup, that uses oxidized lithium as the electrolyte due to its inherent design, does not allow Li-ions to be (de)inserted from every part of the electrode particle, which imposes restrictions on the (de)intercalation process. This may lead to the formation of a mechanistic hypothesis based on incomplete information about the (de)lithiation of the electrode material under investigation. Using LiFePO4 as a model electrode material we propose here a MEMS based cell-on-a-chip design comprising of a thin coating of amorphous electrolyte, which can be utilized to overcome the said issue.