A New Aspect of the Li Diffusion Enhancement Mechanism of Ultrathin Coating Layer on Electrode Materials

2019 ◽  
Vol 11 (42) ◽  
pp. 38719-38726 ◽  
Author(s):  
Yaqi Zhu ◽  
Hiep Pham ◽  
Jonghyun Park
Keyword(s):  
Electrode Materials ◽  
Coating Layer ◽  
Enhancement Mechanism ◽  
Diffusion Enhancement

scholarly journals Discharged Na5V12O32 Nanowire Arrays Coated with Cu-Cu2O for High Performance Lithium-Ion Batteries

2021 ◽  
Author(s):  
Guangjie Yang ◽  
Mengmeng Cui ◽  
Tao Han ◽  
dong fang ◽  
Xingjie Lu ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
High Performance ◽  
Composite Electrode ◽  
Electrode Materials ◽  
Coating Layer ◽  
Lithium Ion ◽  
Nanowire Arrays ◽  
Battery Electrode ◽  
Cu2o Nanoparticles ◽  
Enhanced Electrochemical Performance

Abstract Sodium vanadate have been widely used as a lithium-ion battery anode. However, its further application is restricted by the capacity attenuation during cycles because of its easy solubility in electrolyte, huge structural change, and low conductivity. Here, a lithium-ion battery electrode based on Cu-Cu2O coated Na5V12O32 nanowire arrays using a predischarge-electrodeposition method is freported. Remarkably, in the Cu-Cu2O@Na5V12O32 electrode, the Na5V12O32 nanowires function as the skeleton, and Cu-Cu2O nanoparticles function as the coating layer. At a specific current of 50 mA g-1, the composite electrode exhibits discharge and charge capacity of 837 and 821 mAh g-1 after 80 cycles, respectively, which is much higher than that of the Na5V12O32 nanowires electrode. This research provides a new pathway to explore electrode materials with enhanced electrochemical performance.

Research Progress on Surface Coating Layers on the Positive Electrode for Lithium Ion Batteries

NANO ◽  
2018 ◽  
Vol 13 (11) ◽  
pp. 1830007 ◽  
Author(s):  
Zhen Dong Hao ◽  
Xiaolong Xu ◽  
Hao Wang ◽  
Jingbing Liu ◽  
Hui Yan
Keyword(s):  
Lithium Ion Batteries ◽  
Surface Coating ◽  
Electrode Materials ◽  
Coating Layer ◽  
Lithium Ion ◽  
High Energy ◽  
Positive Electrode ◽  
Research Progress ◽  
Coating Layers ◽  
Positive Electrode Materials

Lithium ion batteries (LIBs) are one of the most promising secondary batteries due to their advantages including long cycle life, high energy density, limited self-discharge, high operating voltage and environmental friendliness. The development of electrode materials is crucial for the further application of LIBs. There are many effective ways to enhance the performance of positive electrode materials of LIBs such as surface coating, ion doping, preparation of composite materials and nanosized materials and so forth. Among them, surface coating is considered to be a promising way to improve the electrochemical performance of LIBs. Surface coating can normally form a physical barrier or a doped surface layer to play favorable roles for the electrode materials, such as hindering side reactions between positive electrode materials and the electrolyte. In this paper, different kinds of surface coating layers will be discussed according to previous research, including carbon materials, metal oxides, metal fluorides, metal phosphates, nonmetal oxides, electrode materials coating layer, hybrid coating layer, polymer and so forth. In addition, the mechanism of these coating materials will be summarized, and the future development will be discussed in this paper.

Nitrogen-Doping-Induced Defects of a Carbon Coating Layer Facilitate Na-Storage in Electrode Materials

2014 ◽  
Vol 5 (1) ◽  
pp. 1400982 ◽  
Author(s):  
Wei Shen ◽  
Cong Wang ◽  
Qunjie Xu ◽  
Haimei Liu ◽  
Yonggang Wang
Keyword(s):  
Carbon Coating ◽  
Nitrogen Doping ◽  
Electrode Materials ◽  
Coating Layer ◽  
Induced Defects

A novel ligand with –NH2 and –COOH-decorated Co/Fe-based oxide for an efficient overall water splitting: dual modulation roles of active sites and local electronic structure

2020 ◽  
Vol 10 (18) ◽  
pp. 6266-6273
Author(s):  
Yalan Zhang ◽  
Zebin Yu ◽  
Ronghua Jiang ◽  
Jung Huang ◽  
Yanping Hou ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Water Splitting ◽  
Energy Demand ◽  
Active Sites ◽  
Electrode Materials ◽  
Global Energy ◽  
Overall Water Splitting ◽  
Local Electronic Structure ◽  
Electrochemical Water Splitting

Excellent electrochemical water splitting with remarkable durability can provide a solution to satisfy the increasing global energy demand in which the electrode materials play an important role.

A method for measuring the in-plane compressive strength and the compression behavior of coating layers

TAPPI Journal ◽  
2011 ◽  
Vol 10 (7) ◽  
pp. 29-34
Author(s):  
TEEMU PUHAKKA ◽  
ISKO KAJANTO ◽  
NINA PYKÄLÄINEN
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Calcium Carbonate ◽  
Coating Layer ◽  
Test Methods ◽  
Coating Films ◽  
Precipitated Calcium Carbonate ◽  
Coating Color ◽  
Mineral Coatings ◽  
Styrene Butadiene

Cracking at the fold is a quality defect sometimes observed in coated paper and board. Although tensile and compressive stresses occur during folding, test methods to measure the compressive strength of a coating have not been available. Our objective was to develop a method to measure the compressive strength of a coating layer and to investigate how different mineral coatings behave under compression. We used the short-span compressive strength test (SCT) to measure the in-plane compressive strength of a free coating layer. Unsupported free coating films were prepared for the measurements. Results indicate that the SCT method was suitable for measuring the in-plane compressive strength of a coating layer. Coating color formulations containing different kaolin and calcium carbonate minerals were used to study the effect of pigment particles’ shape on the compressive and tensile strengths of coatings. Latices having two different glass transition temperatures were used. Results showed that pigment particle shape influenced the strength of a coating layer. Platy clay gave better strength than spherical or needle-shaped carbonate pigments. Compressive and tensile strength decreased as a function of the amount of calcium carbonate in the coating color, particularly with precipitated calcium carbonate. We also assessed the influence of styrene-butadiene binder on the compressive strength of the coating layer, which increased with the binder level. The compressive strength of the coating layer was about three times the tensile strength.

NANOELECTROCATALYSTS BASED PALLADIUM FOR FUEL CELLS WITH DIRECT OXIDATION OF FORMIC ACID

2019 ◽  
Vol 6 (3) ◽  
pp. 104-107
Author(s):  
Marina Vladimirovna Lebedeva ◽  
Alexey Petrovich Antropov ◽  
Alexander Victorovich Ragutkin ◽  
Nicolay Andreevich Yashtulov
Keyword(s):  
Formic Acid ◽  
Palladium Nanoparticles ◽  
Oxidation Reaction ◽  
Electrode Materials ◽  
Formic Acid Oxidation ◽  
Energy Sources ◽  
Acid Oxidation ◽  
Direct Oxidation ◽  
Atomic Force ◽  
Formic Acid Oxidation Reaction

In paper electrode materials with palladium nanoparticles on polymer matrix substrates for energy sources have been formed. Nanocomposites were investigated by atomic force and scanning electron microscopy. The catalytic activity of formed electrodes in the formic acid oxidation reaction was evaluated by voltammetry method.

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