Structure formation and surface chemistry of ionic liquids on model electrode surfaces—Model studies for the electrode | electrolyte interface in Li-ion batteries

2018 ◽  
Vol 148 (19) ◽  
pp. 193821 ◽  
Author(s):  
Florian Buchner ◽  
Benedikt Uhl ◽  
Katrin Forster-Tonigold ◽  
Joachim Bansmann ◽  
Axel Groß ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Surface Chemistry ◽  
Structure Formation ◽  
Li Ion Batteries ◽  
Electrode Surfaces ◽  
Model Studies ◽  
Electrolyte Interface ◽  
Li Ion

scholarly journals Impact of Surface Chemistry of Silicon Nanoparticles on the Structural and Electrochemical Properties of Si/Ni3.4Sn4 Composite Anode for Li-Ion Batteries

Nanomaterials ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 18
Author(s):  
Tahar Azib ◽  
Claire Thaury ◽  
Fermin Cuevas ◽  
Eric Leroy ◽  
Christian Jordy ◽  
...  
Keyword(s):  
Surface Chemistry ◽  
Electrochemical Properties ◽  
Large Scale ◽  
Silicon Nanoparticles ◽  
Lithium Ion ◽  
Li Ion Batteries ◽  
Chemical Homogeneity ◽  
Electrochemical Behaviors ◽  
Pure Silicon ◽  
Li Ion

Embedding silicon nanoparticles in an intermetallic matrix is a promising strategy to produce remarkable bulk anode materials for lithium-ion (Li-ion) batteries with low potential, high electrochemical capacity and good cycling stability. These composite materials can be synthetized at a large scale using mechanical milling. However, for Si-Ni3Sn4 composites, milling also induces a chemical reaction between the two components leading to the formation of free Sn and NiSi2, which is detrimental to the performance of the electrode. To prevent this reaction, a modification of the surface chemistry of the silicon has been undertaken. Si nanoparticles coated with a surface layer of either carbon or oxide were used instead of pure silicon. The influence of the coating on the composition, (micro)structure and electrochemical properties of Si-Ni3Sn4 composites is studied and compared with that of pure Si. Si coating strongly reduces the reaction between Si and Ni3Sn4 during milling. Moreover, contrary to pure silicon, Si-coated composites have a plate-like morphology in which the surface-modified silicon particles are surrounded by a nanostructured, Ni3Sn4-based matrix leading to smooth potential profiles during electrochemical cycling. The chemical homogeneity of the matrix is more uniform for carbon-coated than for oxygen-coated silicon. As a consequence, different electrochemical behaviors are obtained depending on the surface chemistry, with better lithiation properties for the carbon-covered silicon able to deliver over 500 mAh/g for at least 400 cycles.

MnSn2 electrodes for Li-ion batteries: Mechanisms at the nano scale and electrode/electrolyte interface

2014 ◽  
Vol 123 ◽  
pp. 72-83 ◽  
Author(s):  
B. Philippe ◽  
A. Mahmoud ◽  
J.-B. Ledeuil ◽  
M.T. Sougrati ◽  
K. Edström ◽  
...  
Keyword(s):  
Li Ion Batteries ◽  
Nano Scale ◽  
Electrolyte Interface ◽  
Li Ion

Anodic Stability of Electrolyte Solvents and Additives at the Ni-Rich NMC Cathode-Electrolyte Interface in Li-Ion Batteries

2021 ◽  
Vol MA2021-01 (2) ◽  
pp. 87-87
Author(s):  
Wesley M. Dose ◽  
Jennifer P. Allen ◽  
Christopher A. O'Keefe ◽  
Israel Temprano ◽  
Erik Björklund ◽  
...  
Keyword(s):  
Li Ion Batteries ◽  
Electrolyte Interface ◽  
Li Ion

Impacts of the Properties of Anode Solid Electrolyte Interface on the Storage Life of Li-Ion Batteries

2018 ◽  
Vol 122 (17) ◽  
pp. 9411-9416 ◽  
Author(s):  
Yong Liu ◽  
Kai Xie ◽  
Yi Pan ◽  
Hui Wang ◽  
Yufang Chen ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Storage Life ◽  
Solid Electrolyte Interface ◽  
Li Ion Batteries ◽  
Electrolyte Interface ◽  
Li Ion

Nitrogen–sulfur co-doped porous carbon prepared using ionic liquids as a dual heteroatom source and their application for Li-ion batteries

2018 ◽  
Vol 29 (21) ◽  
pp. 18179-18186 ◽  
Author(s):  
Mengqi Du ◽  
Yanshuang Meng ◽  
Chaoyu Duan ◽  
Chen Wang ◽  
Fuliang Zhu ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Porous Carbon ◽  
Li Ion Batteries ◽  
Li Ion ◽  
Co Doped

scholarly journals Specifically Designed Ionic Liquids—Formulations, Physicochemical Properties, and Electrochemical Double Layer Storage Behavior

2019 ◽  
Vol 3 (2) ◽  
pp. 58
Author(s):  
Zheng Yue ◽  
Qiang Ma ◽  
Xinyi Mei ◽  
Abigail Schulz ◽  
Hamza Dunya ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
High Viscosity ◽  
Li Ion Batteries ◽  
The Past ◽  
Low Viscosity ◽  
Electrolytic Properties ◽  
Storage Behavior ◽  
Li Ion ◽  
Key Features ◽  
Electrochemical Double Layer

Two key features—non-volatility and non-flammability—make ionic liquids (ILs) very attractive for use as electrolyte solvents in advanced energy storage systems, such as supercapacitors and Li-ion batteries. Since most ILs possess high viscosity and are less prone to dissolving common electrolytic salts when compared to traditional electrolytic solvents, they must be formulated with low viscosity thinner solvents to achieve desired ionic conductivity and dissolution of electrolyte salts in excess of 0.5 M concentration. In the past few years, our research group has synthesized several specifically designed ILs (mono-cationic, di-cationic, and zwitterionic) with bis(trifluoromethylsulfonyl)imide (TFSI) and dicyanamide (DCA) as counter anions. This article describes several electrolyte formulations to achieve superior electrolytic properties. The performance of a few representative IL-based electrolytes in supercapacitor coin cells is presented.

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