Structural and Electrochemical Properties of Li Ion Solvation Complexes in the Salt-Concentrated Electrolytes Using an Aprotic Donor Solvent, N,N-Dimethylformamide

2016 ◽  
Vol 120 (31) ◽  
pp. 17196-17204 ◽  
Author(s):  
Kenta Fujii ◽  
Hideaki Wakamatsu ◽  
Yanko Todorov ◽  
Nobuko Yoshimoto ◽  
Masayuki Morita
Keyword(s):  
Electrochemical Properties ◽  
Ion Solvation ◽  
Concentrated Electrolytes ◽  
Donor Solvent ◽  
Li Ion

(A04 Best Poster Award Winner) Effects of Anion Species on Li Ion Transport and Electrochemical Properties in Highly Concentrated Electrolytes

2020 ◽  
Vol MA2020-02 (4) ◽  
pp. 822-822
Author(s):  
Yosuke Ugata ◽  
Shohei Sasagawa ◽  
Daiki Watanabe ◽  
Kazuhide Ueno ◽  
Masayoshi Watanabe ◽  
...  
Keyword(s):  
Ion Transport ◽  
Electrochemical Properties ◽  
Award Winner ◽  
Concentrated Electrolytes ◽  
Poster Award ◽  
Li Ion ◽  
Anion Species

Electrochemical properties of biomass-derived carbon and its composite along with Na2Ti3O7 as potential high-performance anodes for Na-ion and Li-ion batteries

2021 ◽  
pp. 139026
Author(s):  
Manas Ranjan Panda ◽  
Anish Raj Kathribail ◽  
Brindaban Modak ◽  
Supriya Sau ◽  
Dimple P. Dutta ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
High Performance ◽  
Li Ion Batteries ◽  
Li Ion

Electrochemical properties of Co3O4, Ni–Co3O4 mixture and Ni–Co3O4 composite as anode materials for Li ion secondary batteries

2004 ◽  
Vol 133 (2) ◽  
pp. 252-259 ◽  
Author(s):  
Yong-Mook Kang ◽  
Ki-Tae Kim ◽  
Jin-Ho Kim ◽  
Hyun-Seok Kim ◽  
Paul S Lee ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Anode Materials ◽  
Li Ion

Synthesis and Electrochemical Properties of Spherical LiFePO4/C Composite via Spray Drying

2015 ◽  
Vol 1120-1121 ◽  
pp. 554-558 ◽  
Author(s):  
Juan Mei Wang ◽  
Bing Ren ◽  
Ying Lin Yan ◽  
Qing Zhang ◽  
Yan Wang
Keyword(s):  
Diffusion Coefficient ◽  
Electrochemical Properties ◽  
Spray Drying ◽  
Electrochemical Impedance ◽  
Retention Rate ◽  
Lithium Ion ◽  
Constant Current ◽  
Ion Diffusion ◽  
Electrochemical Tests ◽  
Li Ion

In this work, spherical LiFePO4/C composite had been synthesized by co-precipitation and spray drying method. The structure, morphology and electrochemical properties of the samples were characterized by X-ray diffraction (XRD), scanning electron micrograph (SEM), transmission electron microscope (TEM), constant current charge-discharge tests and electrochemical impedance spectroscopy (EIS) tests. The spherical LiFePO4/C particles consisted of a number of smaller grains. The results showed that the morphology of LiFePO4/C particles seriously affected the Li-ion diffusion coefficient and electrochemical properties of lithium ion batteries. Electrochemical tests revealed the spherical LiFePO4/C composite had excellent Li-ion diffusion coefficient which was calculated to be 1.065×10-11 cm2/s and discharge capacity of 149 (0.1 C), 139 (0.2 C), 133 (0.5 C), 129 (1 C) and 124 mAhg-1(2 C). After 50 cycles, the capacity retention rate was still 93.5%.

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.

Synthesis and electrochemical properties of Zn2Ti3O8/g-C3N4 composites as anode materials for Li-ion batteries

2021 ◽  
Author(s):  
Mengcheng Han ◽  
Lanlan Zhu ◽  
Yan-Mei Li ◽  
Feng Wei
Keyword(s):  
Electrochemical Properties ◽  
Anode Materials ◽  
Solvothermal Method ◽  
Li Ion Batteries ◽  
Li Ion

Zn2Ti3O8/g-C3N4 (0, 1, 3 and 8 wt%) composites were prepared through a simple solvothermal method, and their physical and electrochemical properties were systematically analyzed. SEM and HRTEM results show that...

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