Synthesis and performance of Al3+-doped cathode materials 0.6Li[Li1/3Mn2/3]O2 · 0.4Li[Ni1/3Mn1/3Co(1/3-y)Aly]O2 by high temperature solid-state method

2019 ◽  
Author(s):  
Aili Zhang ◽  
Axiang Li ◽  
Shuai Tong ◽  
Lina Yv ◽  
Xinran Yang ◽  
...  
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Cathode Materials ◽  
Solid State Method ◽  
State Method ◽  
And Performance

Photoluminescence Properties of Ca3Si2O7: Pr3+ Orange-Red Phosphors Prepared by High-Temperature Solid-State Method

2018 ◽  
Vol 73 (6) ◽  
pp. 555-558 ◽  
Author(s):  
Zhi-Qing Peng ◽  
Rong Chen ◽  
Wen-Lin Feng
Keyword(s):  
Crystal Structure ◽  
High Temperature ◽  
Solid State ◽  
Solid State Method ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Red Phosphors ◽  
Typical Sample ◽  
State Method ◽  
Xrd Patterns

AbstractNovel luminescent materials Ca3-xSi2O7: xPr3+ were successfully prepared by the high-temperature solid-state method. The crystal structure, morphology, and optical spectrum were characterised by X-ray diffraction (XRD), scanning electron microscopy (SEM), and spectroscopy, respectively. The XRD patterns of the samples indicate that the crystal structure is monoclinic symmetry. The SEM shows that the selected sample has good crystallinity although its appearance is irregular and scalelike. The peak of the excitation spectrum of the sample is located at around 449 nm, corresponding to 3H4→3P2 transition of Pr3+. The peak of the emission spectrum of the sample is situated at around 612 nm which is attributed to 3P0→3H6 transition of Pr3+, and the colour is orange-red. The optimum concentration for Pr3+ replaced Ca2+ sites in Ca3Si2O7: Pr3+ is 0.75 mol%. The lifetime (8.48 μs) of a typical sample (Ca2.9925Pr0.0075)Si2O7 is obtained. It reveals that orange-red phosphors Ca3-xSi2O7: xPr3+ possess remarkable optical properties and can be used in white light emitting devices.

Photoluminescence Properties of K1-xSr4(BO3)3∶xPr3+ Phosphors Prepared by High-Temperature Solid-State Method

2017 ◽  
Vol 37 (5) ◽  
pp. 0516001
Author(s):  
马诗章 Ma Shizhang ◽  
冯文林 Feng Wenlin ◽  
彭志清 Peng Zhiqing
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Photoluminescence Properties ◽  
Solid State Method ◽  
State Method

Rational design of a synthetic strategy, carburizing approach and pore-forming pattern to unlock the cycle reversibility and rate capability of micro-agglomerated LiMn0.8Fe0.2PO4 cathode materials

2018 ◽  
Vol 6 (22) ◽  
pp. 10395-10403 ◽  
Author(s):  
Yan Wang ◽  
Cheng-Yu Wu ◽  
Hao Yang ◽  
Jenq-Gong Duh
Keyword(s):  
Solid State ◽  
Cathode Materials ◽  
Rational Design ◽  
Rate Capability ◽  
Solid State Method ◽  
Synthetic Strategy ◽  
State Method ◽  
Carbon Network

A uniform 3D interconnected conductive carbon network modified LiMn0.8Fe0.2PO4 micro agglomerate was synthesized via three-step solid-state method combined with three-step carburizing and two-step pore-forming.

Modification on the structural stability of LiNi0.8Co0.1Mn0.1O2 cathode materials via Pr-doping by the solid-state method

Ionics ◽  
2020 ◽  
Vol 26 (11) ◽  
pp. 5417-5426
Author(s):  
Shenghong Chang ◽  
Yunjiao Li ◽  
Junchao Zheng ◽  
Dianwei Zhang ◽  
Jiachao Yang ◽  
...  
Keyword(s):  
Solid State ◽  
Structural Stability ◽  
Cathode Materials ◽  
Solid State Method ◽  
State Method

Crystal structure, luminescence properties, energy transfer, tunable occupation and thermal properties of a novel color-tunable phosphor NaBa1−zSrzB9O15:xCe3+,yMn2+

2018 ◽  
Vol 47 (39) ◽  
pp. 13913-13925 ◽  
Author(s):  
Qi Bao ◽  
Zhijun Wang ◽  
Jiang Sun ◽  
Zhipeng Wang ◽  
Xiangyu Meng ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Energy Transfer ◽  
Thermal Properties ◽  
High Temperature ◽  
Solid State ◽  
Luminescence Properties ◽  
Solid State Method ◽  
Color Tunable ◽  
State Method

A series of color-tunable NaBa1−zSrzB9O15:Ce3+,Mn2+ phosphors were synthesized by a high temperature solid state method.

ChemInform Abstract: High Performance 5 V LiNi0.5Mn1.5O4Spinel Cathode Materials Synthesized by an Improved Solid-State Method.

ChemInform ◽  
2015 ◽  
Vol 46 (52) ◽  
pp. no-no
Author(s):  
Zhi-Gang Gao ◽  
Kai Sun ◽  
Li-Na Cong ◽  
Yu-Hang Zhang ◽  
Qin Zhao ◽  
...  
Keyword(s):  
Solid State ◽  
Cathode Materials ◽  
High Performance ◽  
Solid State Method ◽  
State Method

Design and synthesis of Ba3SiSe5 with suitable birefringence modulated via MIV atoms in Ba-MIV-Q (MIV = Si, Ge; Q = S, Se) system

2021 ◽  
Author(s):  
Huanhuan Cheng ◽  
Abudukadi Tudi ◽  
Peng Wang ◽  
Kewang Zhang ◽  
Zhihua Yang ◽  
...  
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Solid State Method ◽  
Orthorhombic System ◽  
Space Group ◽  
Design And Synthesis ◽  
Centrosymmetric Space Group ◽  
System P ◽  
State Method

A new ternary Ba-based selenide, Ba3SiSe5, was synthesized by high-temperature solid-state method. It crystalizes in the centrosymmetric space group Pnma (No. 62) of the orthorhombic system. The structure of the...

Upconversion Luminescent Properties of YVO4:Tm3+, Ho3+, Yb3+

2012 ◽  
Vol 502 ◽  
pp. 132-135 ◽  
Author(s):  
Jia Yue Sun ◽  
Ji Cheng Zhu ◽  
Jun Hui Zeng ◽  
Zhi Guo Xia ◽  
Hai Yan Du
Keyword(s):  
Optical Properties ◽  
High Temperature ◽  
Solid State ◽  
Laser Diode ◽  
Luminescent Properties ◽  
Solid State Method ◽  
State Method ◽  
Co Doped

YVO4 co-doped with Tm3+/Ho3+/Yb3+ were synthesized by the high temperature solid state method and the optical properties of phosphors were characterized. Intense visible emissions centered at around 475, 541 and 649 nm, originated from the transitions of Tm3+:1G4→3H6, Ho3:5S2/>:5F4 →5I8, Tm3+:5G4→3F4 and Ho3+:5F5→5I8, respectively, have been observed in samples upon excitation with a 980 nm laser diode, and the involved mechanisms have been explained.

The Effect of Thermal Treatment Temperature and Duration on Electrochemistry Performance of LiNi1/3Co1/3Mn1/3O2 Cathode Materials for Lithium-ion Batteries

2018 ◽  
Vol 14 (5) ◽  
pp. 440-447 ◽  
Author(s):  
Gang Sun ◽  
Chenxiao Jia ◽  
Shuanlong Di ◽  
Jianning Zhang ◽  
Qinghua Du ◽  
...  
Keyword(s):  
Solid State ◽  
Thermal Treatment ◽  
Electrochemical Performance ◽  
Cathode Material ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Raw Materials ◽  
Lithium Ion ◽  
Solid State Method ◽  
State Method

Background: LiNi1/3Mn1/3Co1/3O2 derived from the solid-state method suffers from the problem of significant irreversible charge-discharge behavior. To improve the electrochemical performance of LiNi1/3Mn1/3Co1/3O2, there are several important factors, such as starting raw materials, precursor, preparation method and conditions. In this work, the layered LiNi1/3Mn1/3 Co1/3O2 material was prepared by solid-state reaction. By varying the temperature and duration of synthesis thermal treatment, the greater crystallinity and well-ordered layered LiNi1/3Mn1/3Co1/3O2 cathode material has been successfully synthesized. The structural properties, morphology and electrochemical properties of LiNi1/3Mn1/3Co1/3O2 powders have been investigated in detail. Methods: LiNi1/3Co1/3Mn1/3O2 cathode material was synthesized via a high-temperature solid-state method. Stoichiometric amounts of Ni(CH3COO)2•4H2O, Co(CH3COO)2•4H2O, Mn(CH3COO)2• 4H2O, and Li2CO3 as raw materials were homogenized mixed in a ball mill for 8 h at 240 rpm. By varying the temperature and duration of synthesis thermal treatment, LiNi1/3Co1/3Mn1/3O2 cathode materials with different electrochemistry performance were achieved. (a) The effect of the temperature of synthesis thermal treatment on electrochemistry performance of LiNi1/3Co1/3Mn1/3O2 was explored by calcining the above mixed powder at 800°C, 850°C, 900°C, 950°C, and 1000°C for 12 h in air at a rate of 5°C min-1. Then the target product was prepared at last. The obtained compound was named as N-800, N-850, N-900, N-950 and N-1000, respectively. (b) In order to explore the effect of the duration of synthesis thermal treatment on electrochemistry performance of LiNi1/3 Co1/3Mn1/3O2 cathode material, the above mixed raw materials were calcined at 900°C for 4 h, 8 h, 12 h, 16 h and 20 h in air at a rate of 5°C min-1. The obtained compound was named as N-4, N-8, N- 12, N-16 and N-20, respectively. The N-900 and N-12 are the same sample. Results: The cathode material sintered at 900°C for 12 h revealed the best electrochemical performance, with high-capacity and recyclability compared with other materials. Its initial discharge capacity attains 182.4 mAh g-1 at 0.2 C in the voltage range of 2.5-4.6 V, which can be attributed to its greater crystallinity and well-ordered layered structure. Compared with other studies on lithium-ion batteries given in literature, this work provides a sample, optimal and mild synthetic conditions to synthesize the cathode materials with great electrochemistry performance. Conclusion: A greater crystallinity and well-ordered layered LiNi1/3Mn1/3Co1/3O2 powders had been successfully synthesized by mixing raw materials under various temperatures and duration of synthesis thermal treatment. The XRD results indicated the I(003)/I(104) values of N-900 (N-12) is 1.591 larger than 1.2, which illustrates no undesirable cation mixing to be occurred. In this work, from the results of electrochemical property experiments, it can be indicated that the optimal synthesized conditions are 900°C for 12 h. When the calcination temperature is too low and the calcined time is too short, the material is poorly crystalline and has a poor layer structure. When the calcination temperature is too high and the calcined time is too long, lithium salt is evaporated completely during the calcination process resulting in a poor electrochemistry performance.

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