Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7732433 | Journal of Power Sources | 2015 | 14 Pages |
Abstract
This paper analyzes the behavior and studies the thermal degradation phenomena of a novel sodium rich Prussian blue cathode with a sodium deficient and sodium rich anode system viz. amorphous TiO2, crystalline (pristine), and heat treated TiO2 and Na2Ti3O7, respectively. The primary aim of the research was to demonstrate the superiority of the Na2Ti3O7 anode, which in principle can be considered “pre-stressed” by Na atoms when converted from TiO2 to Na2Ti3O7. Another motive of the research was to analyze exhaustively the layered anode structure and its degradation phenomena using the unique technique of thermal imaging to correlate it with post cycled X-ray diffraction (XRD) and an AC impedance study. The Na2Ti3O7 system was seen as more stable than the other tested TiO2 based anodes and produced an open circuit voltage (OCV) of 3.59 V and a maximum specific capacity of 92.18 mAh gâ1 when the electrolyte used was dissolved in an organic solvent. Under the same conditions, the TiO2 sample showed an OCV of 3.41 V and a maximum specific capacity of 71.93 mAh gâ1. Thermal imaging studies show that the maximum electrochemical degradation occurs at the anode of the samples with the TiO2 sample being more susceptible to corrosion.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Santanu Mukherjee, Alex Bates, Nicholas Schuppert, Byungrak Son, Joo Gon Kim, Jae Sung Choi, Moon Jong Choi, Dong-Ha Lee, Osung Kwon, Jacek Jasinski, Sam Park,