Highly porous structured Sr-doped La2NiO4/NiO composite cathode with interconnected pores for lithium-oxygen batteries

2021 ◽  
pp. 134278
Author(s):  
Hyemin Kim ◽  
Young Soo Lim ◽  
Jung Hyun Kim
Keyword(s):  
Composite Cathode ◽  
Lithium Oxygen Batteries ◽  
Highly Porous ◽  
Interconnected Pores

scholarly journals From Bio-waste to Bone Substitute

2020 ◽  
Vol 34 (2) ◽  
pp. 59-71
Author(s):  
Antonia Ressler ◽  
Karla Zadro ◽  
Hrvoje Ivanković ◽  
Marica Ivanković ◽  
Matija Cvetnić ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Bone Substitute ◽  
Bone Growth ◽  
Composite Scaffold ◽  
Composite Scaffolds ◽  
Nanocomposite Structure ◽  
Na Ions ◽  
Biomimetic Hydroxyapatite ◽  
Highly Porous ◽  
Interconnected Pores

Nanocomposite structure of the bone can be mimicked by chitosan/hydroxyapatite (CS/HAp) composite scaffold. Biological hydroxyapatite (HAp) contains various ions, which have a crucial role in bone growth. The aim of the present work was to synthesize biomimetic hydroxyapatite and prepare composite scaffolds based on chitosan, where HAp was synthesised from hen eggshells, seashells and cuttlefish bone. The powders were composed of nano-structured calcium deficient HAp and amorphous calcium phosphate (ACP). In the as-prepared powders, Sr2+, Mg2+ and Na+ ions were detected as a result of using biogenic precursor of Ca2+ ions. Highly porous CS/HAp structures have been prepared by freeze-gelation technique. The CS/HAp scaffolds have shown highly porous structure with very well interconnected pores and homogeneously dispersed HAp particles. The MTT assay of CS/HAp scaffolds has shown no toxicity, and the live/dead assay has confirmed good viability and proliferation of seeded cells.

Fabrication and Characterisation of Polymer and Composite Scaffolds Based on Polyhydroxybutyrate and Polyhydroxybutyrate-Co-Hydroxyvalerate

2007 ◽  
Vol 334-335 ◽  
pp. 1229-1232 ◽  
Author(s):  
Naznin Sultana ◽  
Min Wang
Keyword(s):  
Freeze Drying ◽  
Polymer Concentration ◽  
Three Dimensional ◽  
Polymer Scaffolds ◽  
Composite Scaffolds ◽  
Fabrication And Characterization ◽  
Fabrication Parameters ◽  
Highly Porous ◽  
Interconnected Pores

This paper reports the fabrication and characterization of three-dimensional, highly porous polyhydroxybutyrate (PHB), polyhydroxybutyrate-co-valerate (PHBV) and composite scaffolds made by the emulsion freezing / freezing-drying technique. Freeze-drying of the polymer/solvent/ water phase emulsions produced hard and tough scaffolds with interconnected pores. The effects of the fabrication parameters such as polymer concentration in emulsions and emulsion stabilizer were examined and optimized. The density of polymer scaffolds was found to increase with an increasing polymer concentration. Structural analyses of selected samples using scanning electron microscopy indicated that the scaffolds had pore sizes ranging from several microns to a few hundred microns. The porosity of scaffolds of up to 85% was achieved and it increased with a decreasing polymer concentration. It was found that mechanical properties of composite scaffolds increased with the increasing amount of hydroxyapatite (HA) incorporated in the scaffolds.

A Mo2C/Carbon Nanotube Composite Cathode for Lithium–Oxygen Batteries with High Energy Efficiency and Long Cycle Life

ACS Nano ◽  
2015 ◽  
Vol 9 (4) ◽  
pp. 4129-4137 ◽  
Author(s):  
Won-Jin Kwak ◽  
Kah Chun Lau ◽  
Chang-Dae Shin ◽  
Khalil Amine ◽  
Larry A Curtiss ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Carbon Nanotube ◽  
Composite Cathode ◽  
High Energy ◽  
Cycle Life ◽  
Long Cycle ◽  
Long Cycle Life ◽  
High Energy Efficiency ◽  
Carbon Nanotube Composite ◽  
Lithium Oxygen Batteries

scholarly journals MnO/Nitrogen-doped graphene composite cathode for high performance lithium oxygen batteries

2017 ◽  
Vol 47 (5) ◽  
pp. 663-670
Author(s):  
Yong Cao ◽  
Senrong Cai ◽  
Mingsen Zheng ◽  
Ruming Yuan ◽  
Quanfeng Dong ◽  
...  
Keyword(s):  
High Performance ◽  
Composite Cathode ◽  
Nitrogen Doped ◽  
Graphene Composite ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Lithium Oxygen Batteries

Immobilization of Inorganic Ion-Exchanger Into Biopolymer Foams: Application to Cesium Sorption

2013 ◽  
Author(s):  
Yves Barrè ◽  
Audrey Hertz
Keyword(s):  
Rate Coefficient ◽  
Ion Exchanger ◽  
Inorganic Ion Exchanger ◽  
Inorganic Ion ◽  
Pseudo Second Order ◽  
Edx Analyses ◽  
Highly Porous ◽  
Order Rate Equation ◽  
Interconnected Pores ◽  
Diffusion Properties

Nickel-potassium ferrocyanide (along with other ferrocyanide sub-products, as shown by mineralization, SEM-EDX analyses) has been immobilized in highly porous discs of chitin for the sorption of Cs(I) from near neutral solutions. The immobilization process allows synthesizing stable materials that can bind up to 80 mg Cs g−1 (i.e., 240 mg Cs g−1 ion-exchanger). The pseudo-second order rate equation fits well kinetic profiles: the rate coefficient increases with the flow rate of recirculation (to force the access to potentially non-interconnected pores), as an evidence of the control of uptake kinetics by diffusion properties. Preliminary tests performed on 137Cs spiked solutions confirm the efficiency of the material for the treatment of effluents bearing radionuclides.

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