Development and characterization of new layered cathode materials for Li ion batteries

Date

2015-09-07

Author

Pişkin, Berke
Aydınol, Mehmet Kadri

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URI

https://hdl.handle.net/11511/71005

Conference Name

International Symposium on Energy Stoarge and Conversion (2015)

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Development and characterization of new layered cathode materials for lithium ion batteries Pişkin, Berke; Aydınol, Mehmet Kadri; Department of Metallurgical and Materials Engineering (2018) In the present study, the effects of Ni:Mn:Co mole ratio and doping elements, i.e. Mo, W, Ag and Cu, in Li(NixMnyCo1−x−y-zMz)O2 (NMC) were systematically investigated as cathode materials for Li-ion batteries. Li(Ni1/3Mn1/3Co1/3)O2 (NMC-111), Li(Ni0.2Mn0.2Co0.6)O2 (NMC-226), Li(Ni0.6Mn0.2Co0.2)O2 (NMC-622), Li(Ni0.2Mn0.6Co0.2)O2 (NMC-262) and their doped compositions were synthesized via spray pyrolysis. Spray pyrolysis method was used to attain a spherical fine-sized morphology in the powders synthesized. ...
Development and characterization of high energy cathode materials for lithium-ion batteries Büyükburç, Atıl; Aydınol, Mehmet Kadri; Department of Metallurgical and Materials Engineering (2013) The aim of this thesis is to produce high energy cathode materials based on LiCoO2 materials with the general formula LiCo1-xMxO2 and LiCo1-y-xMxNyO2. In order to achieve this formula, less exploited doping elements such as Mo, Cr and W will be used as well as Mn. During the study, the parameters of the processes which are solution preparation, freeze drying and calcination are optimized. According to the results, 24 hours of freeze drying is enough for drying the samples. Calcination at lower (< 700°C) tem...
Development and characterization of high power density cathode materials for lithium-ion batteries Doğu, Şafak; Aydınol, Mehmet Kadri; Evis, Zafer; Department of Micro and Nanotechnology (2015) In this thesis, facile and cost efficient aqua based synthesis method is developed to synthesize power dense and fast rechargeable LiFePO4 cathode materials. In order to obtain nano sized crystal morphology, nucleation controlled techniques were studied on precursor synthesis. These techniques are freeze (cryogenic) drying with co-precipitation and ultrasound assisted sub-sequential precipitation with vacuum drying at low temperatures (<350 K). In co-precipitation with freeze drying synthesis, star-like pla...
Development and characterization of tin based anode materials for Li-Ion batteries Yılmaz, Emre; Aydınol, Mehmet Kadri; Department of Metallurgical and Materials Engineering (2018) Li-ion batteries are the most popular type of portable secondary batteries. They generate electrons at anode electrode during discharging process by releasing $Li^+$ ions from anode, in which graphite is used as Li reservoir. Recently, $SiO_2$ and Tin (IV) Oxide materials are investigated as anode materials by researchers, due to their very high theoretical capacity. There are two problems, however, limiting their use which are pulverization and irreversible reaction problems. These problems are, also, the ...
Development and characterization of layered Li(NixMnyCo1-x-y)O-2 cathode materials for lithium ion batteries Piskin, Berke; Aydınol, Mehmet Kadri (Elsevier BV, 2016-06-22) The structure of the layered Li(NixMnyCo1-x-y)O-2 in different amounts of x and y ranging between 0.2 and 0.6, have been synthesized and investigated by powder X-ray diffraction and electron microscopy techniques. In the current work spray pyrolysis was used to obtain spherical fine-sized morphology followed by heat treatment to obtain better electrochemical activity. The precursor powders were prepared using aqueous solution via spray pyrolysis. Synthesized samples were then heat treated at 850 degrees C. ...

Citation Formats

B. Pişkin and M. K. Aydınol, “Development and characterization of new layered cathode materials for Li ion batteries,” presented at the International Symposium on Energy Stoarge and Conversion (2015), 2015, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/71005.