Observation and Quantification of Nanoscale Processes in Lithium Batteries by Operando Electrochemical (S)TEM

被引：263

作者：

Mehdi, B. L. ^{[1
]}

Qian, J. ^{[2
]}

Nasybulin, E. ^{[2
]}

Park, C. ^{[3
]}

Welch, D. A. ^{[4
]}

Faller, R. ^{[4
]}

Mehta, H. ^{[5
]}

Henderson, W. A. ^{[2
]}

Xu, W. ^{[2
]}

Wang, C. M. ^{[5
]}

Evans, J. E. ^{[5
]}

Liu, J. ^{[2
]}

Zhang, J-G. ^{[2
]}

Mueller, K. T. ^{[5
,6
]}

Browning, N. D. ^{[1
]}

机构：

[1] Pacific NW Natl Lab, Joint Ctr Energy Storage Res, Fundamental & Computat Sci Directorate, Richland, WA 99352 USA

[2] Pacific NW Natl Lab, Joint Ctr Energy Storage Res, Energy & Environm Directorate, Richland, WA 99352 USA

[3] Florida State Univ, Dept Ind & Mfg Engn, Tallahassee, FL 32306 USA

[4] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA

[5] Pacific NW Natl Lab, Joint Ctr Energy Storage Res, Environm Mol Sci Lab, Richland, WA 99352 USA

[6] Penn State Univ, Dept Chem, University Pk, PA 16802 USA

来源：

NANO LETTERS | 2015年 / 15卷 / 03期

基金：

美国国家科学基金会;

关键词：

Operando scanning transmission electron microscopy; SEI layer; in situ electrochemical liquid cell; Li batteries; Li dendrite formation; Li deposition/dissolution; TRANSMISSION ELECTRON-MICROSCOPY; ION BATTERIES; LIQUID-CELL; GROWTH; CHALLENGES; SAFETY; ISSUES; COST;

D O I：

10.1021/acs.nanolett.5b00175

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

An operando electrochemical stage for the transmission electron microscope has been configured to form a Li battery that is used to quantify the electrochemical processes that occur at the anode during charge/discharge cycling. Of particular importance for these observations is the identification of an image contrast reversal that originates from solid Li being less dense than the surrounding liquid electrolyte and electrode surface. This contrast allows Li to be identified from Li-containing compounds that make up the solid-electrolyte interphase (SEI) layer. By correlating images showing the sequence of Li electrodeposition and the evolution of the SEI layer with simultaneously acquired and calibrated cyclic voltammograms, electrodeposition, and electrolyte breakdown processes can be quantified directly on the nanoscale. This approach opens up intriguing new possibilities to rapidly visualize and test the electrochemical performance of a wide range of electrode/electrolyte combinations for next generation battery systems.

引用

页码：2168 / 2173

页数：6

共 29 条

[1] Probing the Degradation Mechanisms in Electrolyte Solutions for Li-Ion Batteries by in Situ Transmission Electron Microscopy [J].