Showing papers in "Journal of Power Sources in 2001"

TL;DR: In this paper, the PICACTIF SC carbon was found to be an interesting active material for supercapacitors, with a specific capacitance as high as 125 F/g.

TL;DR: In this article, the authors introduce commonly used methods for state-of-charge (SOC) determination and establish a relationship between the advantages of different methods and the most common applications.

TL;DR: In this paper, the electrochemical behavior of three triphylite (LiFePO4) ores from different mining localities has been investigated, and the best results were obtained with carbon coatings coming from the decomposition of a modified polycyclic aromatic.

TL;DR: In this article, a review of the fundamental areas of research, which have enabled the rapid advances in the technology development, i.e., transition from polystyrene sulfonic acid to perfluorosulfonic acid membranes, a 10- to 100-fold reduction in the platinum loading in electrode by using nanosize electrocatalyst particles supported on high surface area carbon and impregnation of the proton conducting electrolyte into the active layer of the electrode, optimization of structure of electrode and of membrane and electrode assembly to enhance power densities to 0.5-0.

TL;DR: In this paper, a complete polarization model of a solid oxide fuel cell (SOFC) was presented to eliminate the ambiguity of the suitability of such model when used under different design and operating conditions.

TL;DR: In this paper, the two-phase flow and transport of reactants and products in the air cathode of proton exchange membrane (PEM) fuel cells is studied analytically and numerically.

TL;DR: In this paper, the past 10 years' technological achievement is traced and future possibilities are discussed in the field of lithium ion secondary batteries (LIBs), and the authors discuss the future possibilities of the technology.

TL;DR: In this article, the long term calendar life of LiCoO 2 cells for satellite and standby applications has been studied in experiments where the capacity evolution is tracked as a function of storage temperature.

TL;DR: In this paper, the authors report approaches to the development of high temperature membranes for proton exchange membrane fuel cells; composite perfluorinated sulfonic acid membranes were prepared to improve water retention, and non-aqueous proton conducting membrane was prepared to circumvent the loss of water.

TL;DR: In this paper, a one-dimensional non-isothermal model of a proton exchange membrane (PEM) fuel cell has been developed to investigate the effect of various design and operating conditions on the cell performance, thermal response and water management.

TL;DR: In this article, the authors highlight the most important technological progresses in the areas of water and thermal management, scale-up from single cells to cell stacks, bipolar plates and flow fields, and fuel processing.

TL;DR: In this article, the authors studied the electrochemical extraction of lithium from solid-state synthesized LiFePO4 by neutron powder diffraction, and proposed mechanisms for lithium extraction/insertion during the first-cycle.

TL;DR: In this paper, the accelerated calendar and cycle life of lithium-ion cells was studied and the data have been modeled using these two concepts and the calculated data agree well with the experimental values.

TL;DR: In this paper, the authors examined the present global use of energy in its various forms, and considered projections for the year 2020 with particular attention to the harnessing of "clean" and renewable forms of energy for electricity generation and road transportation.

TL;DR: In this paper, the design and off-design analysis of a hybrid system (HS) based on the coupling of a recuperated micro gas turbine (MGT) with a high temperature solid oxide fuel cell (SOFC) was addressed.

TL;DR: In this article, a three-dimensional mathematical model for a planar SOFC was constructed and the concentrations of the chemical species, the temperature distribution, the potential distribution, and the current density were calculated using a single unit model with double channels of co-flow or counter-flow pattern.

TL;DR: In this paper, four types of orthorhombic olivine LiMPO4 (M:Co, Fe, Ni and Mn) were investigated as highvoltage cathode active materials for lithium secondary batteries.

TL;DR: In this article, the authors describe some preliminary activity in progress in their laboratory mainly directed to the development and evaluation of a multi-step recycling process, which gives promises of obtaining a good recovery of the battery components by rather efficient and easily achievable operations.

TL;DR: In this article, the authors highlight the operating principles and advances made in these battery systems during the recent years and highlight significant improvements have been made in the Ni-MH batteries which are slowly capturing the market occupied by the ubiquitous Ni-Cd batteries.

TL;DR: In this paper, the capacitance of nanotubes modified with conducting polypyrrole (PPy) was shown to reach 170 F/g, about twice that given either by the original PPy or pure PPy, and the open entangled network of the nanocomposite seems to favour a better efficiency for the formation of the electrical layer in PPy.

TL;DR: In this article, a symmetric cell approach is developed to distinguish the anode and cathode effects on the impedance rise, and the cathode impedance, especially charge-transfer resistance, is identified as the main component of the cell impedance and is most responsible for the rise of cell impedance during storage at room temperature.

TL;DR: In this paper, an up-to-date review of fuel cell technology is presented, with a focus on the possibility that fuel cells will make an important contribution to world energy supplies for both mobile and stationary applications.

TL;DR: In this article, a thermodynamics experiment and study were carried out for the lithium-ion (Li-ion) batteries that are expected as the power sources for electric and hybrid vehicles, and it was confirmed that the heat coming in and going out depend on charging and discharging, respectively.

TL;DR: In this paper, the galvanostatic cycling behavior of Sn/SnSb composite electrodes has been studied in 1 ǫl−1 LiClO4/propylene carbonate (PC), 1 Ã l− 1 LiPF6/ethylene carbonate(EC)/diethyl carbonates (DEC) (1:1), and 1 Â l−1 LCO4/PC saturated with trans-decalin (t-Dec).

TL;DR: A brief review of fundamental studies of the reversible reactivity mechanism of vanadates towards lithium is presented in this article, where the new opportunities provided by these metal oxides systems based on the reversible formation/decomposition of Li2O are discussed together with the positive attributes that nanoparticles could have to the field of energy storage.

TL;DR: In this paper, the onset of dendritic growth in symmetrical lithium/polymer/lithium cells, at current densities ranging from 2 x 10 -2 to 3 x 10 −1 mA cm -2, was studied.

TL;DR: In this article, the electrochemical characteristics and catalytic activity of Pt-tungsten oxide and Pt-itanium oxide catalysts in polymer electrolyte fuel cell were investigated by cyclic voltammetry and in fuel cells.

TL;DR: In this article, the authors describe the operating principle, performance, production and applications of the ZEBRA battery, and describe its operating principle and performance, as well as its applications.

TL;DR: In this paper, the effects of a pulse charging technique on charge-discharge behavior and cycling characteristics of commercial lithium-ion batteries were investigated by comparison with the conventional direct current (dc) charging.