Synthesis and ionic-electronic conductivity of A-site deficient (Y, In) co-doped SrTiO 3 as novel materials for mixed conductor

2015 ◽  
Vol 107 ◽  
pp. 119-122 ◽  
Author(s):  
Ke Shan ◽  
Zhong-Zhou Yi
Keyword(s):  
Electronic Conductivity ◽  
Mixed Conductor ◽  
Novel Materials ◽  
A Site ◽  
Co Doped

Evaluation of nutrient runoff from the kako river by continuous daily sampling

1996 ◽  
Vol 34 (12) ◽  
pp. 67-72
Author(s):  
Yukio Komai
Keyword(s):  
Suspended Solids ◽  
Water Discharge ◽  
Electronic Conductivity ◽  
High Water ◽  
Nutrient Loads ◽  
Discharge Condition ◽  
Nutrient Runoff ◽  
Average Value ◽  
Daily Sampling ◽  
A Site

A water sample was taken once a day for 15 months at a site near an estuary of the Kako River, Japan, to estimate nutrient loads from rivers to the sea. Total phosphorus (T-P), total nitrogen (T-N), suspended solids (SS) and electronic conductivity (EC) were measured. T-P and SS concentrations varied in proportion to the discharge, and T-P concentrations increased with those of SS, too. EC varied inversely with the discharge, but the fluctuations of T-N concentrations were less than those of T-P and SS concentrations. Water quality remained, for the most part, constant throughout the day. T-P, T-N and SS load were 181t/year, 2320t/year and 51000t/year in 1992, respectively, 54% of T-P load, 47% of T-N load and 80% of SS loads outflowed in those cases where the discharge was more than 100 m3/s, which were 36 days in 1992. 79% of T-P load, 69% of T-N load and 92% of SS load outflowed in periods of high water discharge, which were 88 in 1992. T-P and T-N loads calculated by using one day's data in every month were 151t/year and 2450t/year. But nutrient loads calculated by using the average value of data from an ordinary discharge were two or three times lower than calculated yearly loads. These results showed the importance of estimating the yearly load considering the discharge condition and sampling at a time of high water discharge.

Mixed ionic-electronic conductivity features of A-site deficient Nd nickelates

2020 ◽  
Vol 46 (16) ◽  
pp. 25527-25535 ◽  
Author(s):  
V.A. Sadykov ◽  
E.M. Sadovskaya ◽  
E.A. Filonova ◽  
N.F. Eremeev ◽  
N.M. Bogdanovich ◽  
...  
Keyword(s):  
Electronic Conductivity ◽  
A Site ◽  
Mixed Ionic Electronic Conductivity

Extended D.C. Electrical Transport Measurements on the Mixed Conductor Cu3Cs2

1997 ◽  
Vol 500 ◽  
Author(s):  
P. K. Lemaire ◽  
J. Benoit ◽  
R. Speel
Keyword(s):  
Ionic Conductivity ◽  
Electrical Transport ◽  
Electronic Conductivity ◽  
Ionic Transport ◽  
Mixed Conductor ◽  
Chemical Diffusion Coefficient ◽  
Mixed Conductors ◽  
Voltage Versus ◽  
Temperature Range ◽  
Transport Measurements

ABSTRACTD.C. electrical transport measurements have been done over the temperature range 200 K. to 450 K on the mixed conductor Cu3.0CS2 This work extends the original work done on CuxCS2 over the temperature range 260 K to 350 K. Above 220 K, the voltage versus time curves follow the Yokota model for mixed conductors. Below 220K, the voltage versus time curves were practically constant, suggesting very little ionic transport below this temperature, and an electronic conductivity of the order of 10−5 (Ω cm)−1 at 200 K. At ambient temperatures, the ionic conductivity and electronic conductivity were both of the order of 10−3 (Ω cm)−1, and the chemical diffusion coefficient found to be of the order of 10−6 cm2s−1, in agreement with earlier work on Cu3CS2. Above 220 K, the ionic conductivity versus temperature plots were of the Arrhenius form with an activation energy of about 0.36 eV. The jump time and residence time were estimated to be of the order of 10−12s and 10−6s respectively, confirming hopping as the mode of ionic transport. The electronic conductivity versus temperature plot confirmed thermal activation as the mode of electronic transport. The results suggest CuxCS2 to be very stable and the Yokota model, with very little modification, to be very reliable for the analysis of these mixed conductors.

scholarly journals Ionic/Electronic Conductivity, Thermal/Chemical Expansion and Oxygen Permeation in Pr and Gd Co-Doped Ceria PrxGd0.1Ce0.9-xO1.95-δ

2017 ◽  
Vol 164 (13) ◽  
pp. F1354-F1367 ◽  
Author(s):  
Shiyang Cheng ◽  
Christodoulos Chatzichristodoulou ◽  
Martin Søgaard ◽  
Andreas Kaiser ◽  
Peter Vang Hendriksen
Keyword(s):  
Electronic Conductivity ◽  
Oxygen Permeation ◽  
Doped Ceria ◽  
Chemical Expansion ◽  
Co Doped

A-site deficient perovskite: the parent for in situ exsolution of highly active, regenerable nano-particles as SOFC anodes

2015 ◽  
Vol 3 (20) ◽  
pp. 11048-11056 ◽  
Author(s):  
Yifei Sun ◽  
Jianhui Li ◽  
Yimin Zeng ◽  
Babak Shalchi Amirkhiz ◽  
Mengni Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Vacancies ◽  
Electronic Conductivity ◽  
Nano Particles ◽  
Highly Active ◽  
A Site ◽  
Mobile Oxygen

Introduction of A-site deficiency on Ni-doped LaSrCrO3 anodes helps form highly mobile oxygen vacancies and remarkably enhances Ni nanoparticle reducibility, and significantly increases electronic conductivity and catalytic activity.

scholarly journals N/S-Co-Doped Porous Carbon Sheets Derived from Bagasse as High-Performance Anode Materials for Sodium-Ion Batteries

Nanomaterials ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 1203 ◽  
Author(s):  
Lili Wang ◽  
Lei Hu ◽  
Wei Yang ◽  
Dewei Liang ◽  
Lingli Liu ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Anode Materials ◽  
High Performance ◽  
Low Cost ◽  
Electronic Conductivity ◽  
High Capacity ◽  
Treatment Method ◽  
High Specific Surface Area ◽  
Carbon Sheet ◽  
Co Doped

Heteroatom doping is considered to be an efficient strategy to improve the electrochemical performance of carbon-based anode materials for Na-ion batteries (SIBs), due to the introduction of an unbalanced electron atmosphere and increased electrochemical reactive sites of carbon. However, developing green and low-cost approaches to synthesize heteroatom dual-doped carbon with an appropriate porous structure, is still challenging. Here, N/S-co-doped porous carbon sheets, with a main pore size, in the range 1.8–10 nm, has been fabricated through a simple thermal treatment method, using KOH-treated waste bagasse, as a carbon source, and thiourea, as the N and S precursor. The N/S-co-doped carbon sheet electrodes possess significant defects, high specific surface area, enhanced electronic conductivity, improved sodium storage capacity, and long-term cyclability, thereby delivering a high capacity of 223 mA h g−1 at 0.2 A g−1 after 500 cycles and retaining 155 mA h g−1 at 1 A g−1 for 2000 cycles. This work provides a low-cost route to fabricate high-performance dual-doped porous carbonaceous anode materials for SIBs.

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