scholarly journals Model Studies on Solid Electrolyte Interphase Formation on Graphite Electrodes in Ethylene Carbonate and Dimethyl Carbonate II: Graphite Powder Electrodes

2020 ◽  
Vol 7 (23) ◽  
pp. 4794-4809
Author(s):  
Isabella Weber ◽  
Bin Wang ◽  
Carina Bodirsky ◽  
Monalisa Chakraborty ◽  
Mario Wachtler ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Dimethyl Carbonate ◽  
Ethylene Carbonate ◽  
Solid Electrolyte Interphase ◽  
Graphite Powder ◽  
Graphite Electrodes ◽  
Model Studies

Molecular dynamics investigation of reduced ethylene carbonate aggregation at the onset of solid electrolyte interphase formation

2019 ◽  
Vol 21 (40) ◽  
pp. 22449-22455 ◽  
Author(s):  
Mathew J. Boyer ◽  
Gyeong S. Hwang
Keyword(s):  
Molecular Dynamics ◽  
Solid Electrolyte ◽  
Ethylene Carbonate ◽  
Solid Electrolyte Interphase ◽  
Reactive Intermediates ◽  
P Concentration

Concentration dependent aggregation of reduced ethylene carbonate through Li+ mediation allows for radical combination reactions between the reactive intermediates to stable products such as ethylene dicarbonate.

Examining the Solid Electrolyte Interphase on Binder-Free Graphite Electrodes

2009 ◽  
Vol 156 (4) ◽  
pp. A318 ◽  
Author(s):  
Ang Xiao ◽  
Li Yang ◽  
Brett L. Lucht ◽  
Sun-Ho Kang ◽  
Daniel P. Abraham
Keyword(s):  
Solid Electrolyte ◽  
Solid Electrolyte Interphase ◽  
Graphite Electrodes ◽  
Binder Free

Thermal Behavior of Solid Electrolyte Interphase Films Deposited on Graphite Electrodes with Different States-of-Charge

2015 ◽  
Vol 162 (6) ◽  
pp. A892-A896 ◽  
Author(s):  
Hosang Park ◽  
Taeho Yoon ◽  
Youngjin Kim ◽  
Jae Gil Lee ◽  
Jongjung Kim ◽  
...  
Keyword(s):  
Thermal Behavior ◽  
Solid Electrolyte ◽  
Solid Electrolyte Interphase ◽  
Graphite Electrodes

scholarly journals Quantification of Inactive Lithium and Solid Electrolyte Interphase (SEI) Species on Graphite Electrodes After Fast Charging

2020 ◽  
Author(s):  
Eric McShane ◽  
Andrew Colclasure ◽  
David Brown ◽  
Zachary M. Konz ◽  
Kandler Smith ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Solid Electrolyte Interphase ◽  
Particle Surface ◽  
Graphite Electrodes ◽  
Capacity Loss ◽  
Process Understanding ◽  
Fast Charging ◽  
Graphite Anodes ◽  
Carbonate Species ◽  
Stripping Efficiency

<p>Rapid charging of Li-ion batteries is limited by lithium plating on graphite anodes, whereby Li<sup>+</sup> ions are reduced to Li metal on the graphite particle surface instead of inserting between graphitic layers. Plated Li metal not only poses a safety risk due to dendrite formation, but also contributes to capacity loss due to the low reversibility of the Li plating/stripping process. Understanding when Li plating occurs and how much Li has plated is therefore vital to remedying these issues. We demonstrate a titration technique with a minimum detection limit of 20 nmol (5×10<sup>-4</sup> mAh) Li which is used to quantify inactive Li that remains on the graphite electrode after fast charging. Additionally, the titration is extended to quantify the total amount of solid carbonate species and lithium acetylide (Li<sub>2</sub>C<sub>2</sub>) within the solid electrolyte interphase (SEI). Finally, electrochemical modeling is combined with experimental data to determine the Li plating exchange current density (10 A/m<sup>2</sup>) and stripping efficiency (65%) of plated Li metal on graphite. These techniques provide a highly accurate measure of Li plating onset and quantitative insight into graphite SEI evolution during fast charge.</p>

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