Search academic texts

Information × Registration Number 0218U006274, 0117U004653 , R & D reports Title Anodic materials based on lithiated titanium oxide for lithium-ion batteries with high-rate properties popup.stage_title Head Kyryllov Sviatoslav Oleksandrovych, Registration Date 10-04-2018 Organization Science and Engineering Center "Tekhnoelectrokhim" of National Academy of Sciences of Ukraine popup.description2 The objects of research are electrode materials with spinelized ordered and disordered structures for lithium ion power sources. The purpose is to develop the method for replacing titanium and lithium in the spinel lattice Li4Ti5O12 by transition metal ions to improve the electrophysical properties of the electrode material. Methods of research - thermogravimetric and X-ray diffraction analysis, scanning electron microscopy, porosimetry, cyclic voltammetry, galvanostatic cycling and cycling in a combined mode. The Li4Ti5O12 precursors were synthesized by the citrate method in the presence of citric acid. The comparison shows that best pyrolized samples of citrate precursors obtained in argon compared with thouse obtained on air have twice the size of particles and much better electrochemical properties. In particular, lithium ion power sources based on the system Li || Li4Ti5O12, obtained by pyrolysis in argon, have specific capacity of 148 mAh/g at current load of 1.0 C, 70 mAh/g at a load of 30 C and 32 mAh/g at current load of 60 C. These values exceed the values obtained with the commercial material Li4Ti5O12. For Li4Ti5O12 obtained by pyrolysis on the air, with increase of the discharge current from 1.0 C to 30 C, the discharge capacity decreases from 125 to 40 mAh/g. Product Description popup.authors Косілов Володимир Володимирович Ліснича Тетяна Василівна Потапенко Ганна Валентинівна popup.nrat_date 2020-04-02 Close