The kinetics of hydrogen evolution reaction (HER) was studied in 1M NaOH at various temperatures (298 to 358 K) on Ni-P-C (composite electrodes. The electrochemical efficiency of the electrodes has been evaluated on the basis of electrochemical data obtained from the steady-state polarization Tafel curves, electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) in 1M NaOH solut...

Improving oxygen reduction in microbial fuel cell (MFC) cathodes requires a better understanding of the effects of the catalyst binder chemistry and properties on performance. A series of polystyrene-bpoly(ethylene oxide) (PS-b-PEO) polymers with systematically varying hydrophilicity were designed to determine the effect of the hydrophilic character of the binder on cathode performance. Increas...

Activated carbon (AC) is a useful and environmentally sustainable catalyst for oxygen reduction in air-cathode microbial fuel cells (MFCs), but there is great interest in improving its performance and longevity. To enhance the performance of AC cathodes, carbon black (CB) was added into AC at CB:AC ratios of 0, 2, 5, 10, and 15 wt % to increase electrical conductivity and facilitate electron tr...

Objective GCEP provides funding for research activities of an exploratory nature that test the feasibility and application of potential step-out ideas. These activities focus on novel approaches and innovative concepts associated with technologies that may permit reductions in greenhouse gas emissions on a global scale. While exploratory activities are limited to $100K and a one-year performanc...

The discharge characteristics of silver vanadium oxide (SVO) as a cathode in lithium–silver vanadium oxide (Li–SVO) primary battery was studied under various operating conditions. The cathode yielded a capacity of 260 mAh g at a current density of 0.08 mA cm, although the theoretical capacity of this material is 315 mAh g. The pulse discharge characteristics were studied under conditions that s...

Dr. Y. Qiu, G. Rong, J. Yang, G. Li, S. Ma, X. Wang, Z. Pan, Y. Hou, Dr. M. Liu, Dr. F. Ye, Dr. W. Li, Prof. Y. Zhang i -Lab, Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Suzhou, Jiangsu 215123 , China E-mail: [email protected] Dr. Y. Qiu, Dr. Z. W. Seh, Prof. X. Tao, Dr. H. Yao, Dr. N. Liu, Dr. R. Zhang, Dr. G. Zhou, Prof. Y. Cui Department of Materials Sci...

This article focuses on perovskite materials for application as cathode material in solid oxide fuel cells. In order to develop new promising materials it is helpful to classify already known perovskite materials according to their properties and to identify certain tendencies. Thereby, composition-dependent structural data and materials properties are considered. Structural data under consider...

Electron emission from ceramic disks depends strongly on the shape of the front electrode. The common interconnected grid is not good for a stable emission. An electrode consisting of an ensemble of metal point-like islands within a metal ring leads to quite a stable emission. In the first case the sandwich of the continuous electrode (on one surface) and the grating (on the front surface) cons...

Rechargeable lithium ion batteries, due to their high energy density and design fl exibility, are the vital power sources for a variety of modern portable electronic devices and are the prime candidates to power next generation of electric vehicles (EVs) and plug-in hybrid electric vehicles (PHEVs). [ 1 ] With a rich and versatile chemistry leading to a wide range of electrode materials, severa...

Oxide ions in transition metal oxide cathodes can store charge at high voltage offering a route towards higher energy density batteries. However, upon charging these cathodes, the oxidized condense to form molecular O2 trapped material. Consequently, discharge is much lower than charge, leading undesirable hysteresis. Here we capture nature of electron holes on O2? before formation by exploitin...