Atomic scale insight into the fundamental mechanism of Mn doped LiFePO4

2020 ◽  
Vol 4 (6) ◽  
pp. 2741-2751
Author(s):  
Fei Jiang ◽  
Ke Qu ◽  
Mingshan Wang ◽  
Junchen Chen ◽  
Yang Liu ◽  
...  
Keyword(s):  
Atomic Scale ◽  
Protective Shell ◽  
Mn Doping ◽  
Electrochemical Cycling ◽  
Mn Doped ◽  
Insight Into ◽  
Fundamental Mechanism

Mn doping could form a stable LiMnxFe1−xPO4 protective shell on the surface to suppress LiFePO4 degradation during electrochemical cycling.

Thermoelectric Properties of Mn Doped Cu12-xMnxSb4S13 Tetrahedrites

2016 ◽  
Vol 847 ◽  
pp. 161-165 ◽  
Author(s):  
Ju Yi Wang ◽  
Xiao Ya Li ◽  
Ye Feng Bao
Keyword(s):  
Electrical Conductivity ◽  
Substitution Effect ◽  
Hot Press ◽  
X Ray Diffraction ◽  
Doping Amount ◽  
Spectroscopy Analysis ◽  
Mn Doping ◽  
Thermoelectric Transport Properties ◽  
Hot Press Sintering ◽  
Mn Doped

In this study, Mn doped Cu12-xMnxSb4S13(x=0, 0.5, 1.0, and 2.0) tetrahedrite samples were prepared by melting and annealing followed by hot press sintering. Powder X-ray diffraction and scanning electron microscopy and electron energy dispersive spectroscopy analysis were performed for the samples, and the thermoelectric transport properties of samples were characterized. The experimental results showed that the synthetic tetrahedrites were consisted of principal Cu12Sb4S13 phase and a small amount of secondary Cu3SbS4 and CuSbS2. The electrical conductivity of the tetrahedrites decreased with increasing the Mn doping amount. Contrary to the electrical conductivity, the Seebeck coefficient of the tetrahedrites increased with increasing Mn doping amount. The thermal conductivity decreased with increasing Mn doping amount due to the suppression of the carrier contribution, as well as due to the substitution effect of Mn on the Cu site. For the Mn doped Cu12-xMnxSb4S13 compounds with x=0.5, 1.0, and 2.0, the ZT values decreased with the increase of Mn doping amount, a maximum ZT=0.89 was obtained for the Mn doped compound with x=0.5.

Band gap tuning and p to n-type transition in Mn-doped CuO nanostructured thin films

2022 ◽  
Vol 43 (1) ◽  
pp. 012801
Author(s):  
R. Rahaman ◽  
M. Sharmin ◽  
J. Podder
Keyword(s):  
Thin Films ◽  
Band Gap ◽  
Spray Pyrolysis Technique ◽  
Band Gap Energy ◽  
Dielectric Constants ◽  
X Rays ◽  
Electron Effective Mass ◽  
Mn Doping ◽  
Type Transition ◽  
Mn Doped

Abstract Here we discuss the synthesis of copper (II) oxide (CuO) and manganese (Mn)-doped CuO thin films varying with 0 to 8 at% Mn using the spray pyrolysis technique. As-deposited film surfaces comprised of agglomerated spherical nanoparticles and a semi-spongy porous structure for 4 at% Mn doping. Energy dispersive analysis of X-rays confirmed the chemical composition of the films. X-ray diffraction spectra showed a polycrystalline monoclinic structure with the predominance of the ( 11) peak. Optical band gap energy for direct and indirect transitions was estimated in the ranges from 2.67–2.90 eV and 0.11–1.73 eV, respectively. Refractive index and static dielectric constants were computed from the optical spectra. Electrical resistivity of CuO and Mn-doped CuO (Mn:CuO) thin films was found in the range from 10.5 to 28.6 Ω·cm. The tiniest electron effective mass was calculated for 4 at% Mn:CuO thin films. P to n-type transition was observed for 4 at% Mn doping in CuO films. Carrier concentration and mobility were found in the orders of 1017 cm–3 and 10–1 cm2/(V·s), respectively. The Hall coefficient was found to be between 9.9 and 29.8 cm3/C. The above results suggest the suitability of Mn:CuO thin films in optoelectronic applications.

Effect of Strain on the Tunability of Highly (100) Oriented Mn-doped Barium Strontium Stannate Titanate Thin Films

2007 ◽  
Vol 1034 ◽  
Author(s):  
Shengbo Lu ◽  
Ngai Wing Li ◽  
Zhengkui Xu
Keyword(s):  
Thin Films ◽  
Elastic Strain ◽  
Lattice Mismatch ◽  
Nominal Composition ◽  
Mn Doping ◽  
Inhomogeneous Strain ◽  
Barium Strontium ◽  
Strontium Stannate ◽  
Tunable Device ◽  
Mn Doped

AbstractHighly (100)-oriented Mn-doped barium strontium stannate titanate thin films of a nominal composition (Ba0.7Sr0.3)(Sn0.2Ti0.8-xMnx)O3(Mn-BSSnT) (x=0%, 0.2%, 0.4%, 0.6% and 1%), were fabricated by pulsed laser deposition on (La0.7Sr0.3)O3/LaAlO3substrates. Both elastic strain and inhomogeneous strain were measured by x-ray diffraction techniques. Relationship between the strain and the dielectric properties of the Mn-BSSnT thin films were systematically investigated as a function of the Mn content. Our results show that the tunability is dependent upon not only the elastic strain induced by thermal expansion coefficient and lattice mismatch between the thin film and the substrate but also inhomogeneous strain induced by Mn doping. The tunability decreases with increasing inhomogeneous strain and can be easily manipulated by changing Mn doping content, which is beneficial to real tunable device applications.

Ferro-electric and magnetic properties in Bi5Ti3FeO15 films by Mn-doping

2021 ◽  
Author(s):  
Xue Zhang ◽  
Ruijuan Qi ◽  
Shangwei Dong ◽  
Shuai Yang ◽  
Xuekun Hong ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Cell Volume ◽  
Unit Cell Volume ◽  
Unit Cell ◽  
Mn Doping ◽  
Electrical And Magnetic Properties ◽  
Mn Doped

We investigate the structure and optical, electrical and magnetic properties in Mn-doped Bi5Ti3FeO15 (BTFO) thin films. While Mn-doping does not almost change the structure and unit cell volume of BTFO,...

Promote doping efficiency and photoluminescence quantum yield of Mn-doped perovskite nanocrystals via two-step hot-injection

2021 ◽  
Author(s):  
Yacong Li ◽  
Chuying Wang ◽  
Guangcai Hu ◽  
Wen Meng ◽  
Shiqi Sui ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Ultraviolet Light ◽  
Injection Strategy ◽  
Mn Doping ◽  
Perovskite Nanocrystals ◽  
Orange Emission ◽  
Photoluminescence Quantum Yield ◽  
Bright Orange ◽  
Hot Injection ◽  
Mn Doped

Manganese doped perovskite nanocrystals (NCs) have been synthesized by a novel two-step hot injection strategy with an unprecedented Mn doping efficiency of 48.5%, bright orange emission under ultraviolet light and...

Mn-Doped black phosphorene for ultrasensitive hydrogen sulfide detection: periodic DFT calculations

2020 ◽  
Vol 22 (27) ◽  
pp. 15549-15558 ◽  
Author(s):  
Mahdi Ghadiri ◽  
Mohammad Ghashghaee ◽  
Mehdi Ghambarian
Keyword(s):  
Hydrogen Sulfide ◽  
Dft Calculations ◽  
Work Function ◽  
Electrical Conductance ◽  
Black Phosphorus ◽  
Mn Doping ◽  
Black Phosphorene ◽  
Periodic Dft Calculations ◽  
Mn Doped ◽  
Periodic Dft

A drastic improvement in both the electrical conductance and work function sensitivities of black phosphorus monolayer to H2S through Mn doping is reported. The operation of the modified nanosensor is more promising than for the pristine material.

scholarly journals Atomic Scale Insight into the Formation, Size, and Location of Platinum Nanoparticles Supported on γ-Alumina

ACS Catalysis ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 4193-4204 ◽  
Author(s):  
Ana T. F. Batista ◽  
Walid Baaziz ◽  
Anne-Lise Taleb ◽  
Johan Chaniot ◽  
Maxime Moreaud ◽  
...  
Keyword(s):  
Platinum Nanoparticles ◽  
Atomic Scale ◽  
Insight Into
Sign in / Sign up

Export Citation Format

Share Document