Evolution of the solid electrolyte interphase on tin phosphide anodes in sodium ion batteries probed by hard x-ray photoelectron spectroscopy

2017 ◽  
Vol 245 ◽  
pp. 696-704 ◽  
Author(s):  
Ronnie Mogensen ◽  
Julia Maibach ◽  
William R. Brant ◽  
Daniel Brandell ◽  
Reza Younesi
Keyword(s):  
Solid Electrolyte ◽  
Photoelectron Spectroscopy ◽  
Solid Electrolyte Interphase ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
X Ray ◽  
Tin Phosphide

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

scholarly journals Hydrothermal Activation of Porous Nitrogen-Doped Carbon Materials for Electrochemical Capacitors and Sodium-Ion Batteries

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2163 ◽  
Author(s):  
Yuliya V. Fedoseeva ◽  
Egor V. Lobiak ◽  
Elena V. Shlyakhova ◽  
Konstantin A. Kovalenko ◽  
Viktoriia R. Kuznetsova ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Carbon Nanomaterials ◽  
Carbon Materials ◽  
Sodium Ion ◽  
Carbon Surface ◽  
Energy Storage And Conversion ◽  
Sodium Ion Batteries ◽  
X Ray ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon

Highly porous nitrogen-doped carbon nanomaterials have distinct advantages in energy storage and conversion technologies. In the present work, hydrothermal treatments in water or ammonia solution were used for modification of mesoporous nitrogen-doped graphitic carbon, synthesized by deposition of acetonitrile vapors on the pyrolysis products of calcium tartrate. Morphology, composition, and textural characteristics of the original and activated materials were studied by transmission electron microscopy, X-ray photoelectron spectroscopy, near-edge X-ray absorption fine structure spectroscopy, infrared spectroscopy, and nitrogen gas adsorption method. Both treatments resulted in a slight increase in specific surface area and volume of micropores and small mesopores due to the etching of carbon surface. Compared to the solely aqueous medium, activation with ammonia led to stronger destruction of the graphitic shells, the formation of larger micropores (1.4 nm vs. 0.6 nm), a higher concentration of carbonyl groups, and the addition of nitrogen-containing groups. The tests of nitrogen-doped carbon materials as electrodes in 1M H2SO4 electrolyte and sodium-ion batteries showed improvement of electrochemical performance after hydrothermal treatments especially when ammonia was used. The activation method developed in this work is hopeful to open up a new route of designing porous nitrogen-doped carbon materials for electrochemical applications.

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
Sign in / Sign up

Export Citation Format

Share Document