A Computational Chemical Insight into Microscopic Additive Effect on Solid Electrolyte Interphase Film Formation in Sodium-Ion Batteries: Suppression of Unstable Film Growth by Intact Fluoroethylene Carbonate

2015 ◽  
Vol 119 (32) ◽  
pp. 18046-18055 ◽  
Author(s):  
Norio Takenaka ◽  
Hirofumi Sakai ◽  
Yuichi Suzuki ◽  
Purushotham Uppula ◽  
Masataka Nagaoka
Keyword(s):  
Solid Electrolyte ◽  
Film Growth ◽  
Film Formation ◽  
Solid Electrolyte Interphase ◽  
Additive Effect ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Solid Electrolyte Interphase Film ◽  
Fluoroethylene Carbonate ◽  
Insight Into

Additive effect of fluoroethylene and difluoroethylene carbonates for the solid electrolyte interphase film formation in sodium-ion batteries: a quantum chemical study

RSC Advances ◽  
2016 ◽  
Vol 6 (69) ◽  
pp. 65232-65242 ◽  
Author(s):  
Uppula Purushotham ◽  
Norio Takenaka ◽  
Masataka Nagaoka
Keyword(s):  
Solid Electrolyte ◽  
Quantum Chemical ◽  
Activation Barrier ◽  
Film Formation ◽  
Solid Electrolyte Interphase ◽  
Quantum Chemical Study ◽  
Chemical Study ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Mechanism Study

To reveal the FEC–DFEC mystery, the reduction decomposition mechanism study of Na+–PC, Na+–FEC and Na+–DFEC complexes is carried out by using DFT. This study concludes that the higher activation barrier and absence of NaF complexes make DFEC futile.

Capacity losses due to solid electrolyte interphase formation and sodium diffusion in sodium-ion batteries

2021 ◽  
Author(s):  
Le Anh Ma ◽  
Alexander Buckel ◽  
Leif Nyholm ◽  
Reza Younesi
Keyword(s):  
Carbon Black ◽  
Solid Electrolyte ◽  
Solid Electrolyte Interphase ◽  
Open Circuit ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Electrochemical Testing ◽  
Capacity Loss ◽  
Sei Layer ◽  
Sodium Diffusion

Abstract Knowledge about capacity losses due to the formation and dissolution of the solid electrolyte interphase (SEI) layer in sodium-ion batteries (SIBs) is still limited. One major challenge in SIBs is the fact that the SEI generally contains more soluble species than the corresponding SEI layers formed in Li-ion batteries. By cycling carbon black electrodes against Na-metal electrodes, to mimic the SEI formation on negative SIB electrodes, this study studies the associated capacity losses in different carbonate electrolyte systems. Using electrochemical testing and synchrotron-based X-ray photoelectron (XPS) experiments, the capacity losses due to changes in the SEI layer and diffusion of sodium in the carbon black electrodes during open circuit pauses of 50 h, 30 h, 15 h and 5 h are investigated in nine different electrolyte systems. The different contributions to the open circuit capacity loss were determined using a new approach involving different galvanostatic cycling protocols. It is shown that the capacity loss depends on the interplay between the electrolyte chemistry and the thickness and stability of the SEI layer. The results show, that the Na-diffusion into the bulk electrode gives rise to a larger capacity loss than the SEI dissolution. Hence, Na-trapping effect is one of the major contribution in the observed capacity losses. Furthermore, the SEI formed in NaPF6-EC:DEC was found to become slightly thicker during 50 h pause, due to self-diffused deintercalation of Na from the carbon black structure coupled by further electrolyte reduction. On the other hand, the SEI in NaTFSI with the same solvent goes into dissolution during pause. The highest SEI dissolution rate and capacity loss was observed in NaPF6-EC:DEC (0.57 μAh/hpause) and the lowest in NaTFSI-EC:DME (0.15 μAh/hpause).

Graphite as Cointercalation Electrode for Sodium-Ion Batteries: Electrode Dynamics and the Missing Solid Electrolyte Interphase (SEI)

2018 ◽  
Vol 8 (16) ◽  
pp. 1702724 ◽  
Author(s):  
Mustafa Goktas ◽  
Christoph Bolli ◽  
Erik J. Berg ◽  
Petr Novák ◽  
Kilian Pollok ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Solid Electrolyte Interphase ◽  
Sodium Ion ◽  
Sodium Ion Batteries

Solubility of the Solid Electrolyte Interphase (SEI) in Sodium Ion Batteries

2016 ◽  
Vol 1 (6) ◽  
pp. 1173-1178 ◽  
Author(s):  
Ronnie Mogensen ◽  
Daniel Brandell ◽  
Reza Younesi
Keyword(s):  
Solid Electrolyte ◽  
Solid Electrolyte Interphase ◽  
Sodium Ion ◽  
Sodium Ion Batteries

Solid electrolyte interphase manipulation towards highly stable hard carbon anodes for sodium ion batteries

2020 ◽  
Vol 25 ◽  
pp. 324-333 ◽  
Author(s):  
Panxing Bai ◽  
Xinpeng Han ◽  
Yongwu He ◽  
Peixun Xiong ◽  
Yufei Zhao ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Solid Electrolyte Interphase ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Hard Carbon ◽  
Carbon Anodes

scholarly journals Analysis of the Solid Electrolyte Interphase on Hard Carbon Electrodes in Sodium‐Ion Batteries

2019 ◽  
Vol 6 (6) ◽  
pp. 1745-1753 ◽  
Author(s):  
Marco Carboni ◽  
Jessica Manzi ◽  
Antony Robert Armstrong ◽  
Juliette Billaud ◽  
Sergio Brutti ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Solid Electrolyte Interphase ◽  
Sodium Ion ◽  
Carbon Electrodes ◽  
Sodium Ion Batteries ◽  
Hard Carbon
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