Showing papers in "Journal of Power Sources in 2006"

TL;DR: Supercapacitors are able to store and deliver energy at relatively high rates (beyond those accessible with batteries) because the mechanism of energy storage is simple charge-separation (as in conventional capacitors) as discussed by the authors.

TL;DR: In this article, a review of electrolyte additives used in Li-ion batteries is presented, which can be classified into five categories: solid electrolyte interface (SEI) forming improver, cathode protection agent, LiPF 6 salt stabilizer, safety protection agent and Li deposition improver.

TL;DR: More than 100 articles related to anode catalysts for the direct methanol fuel cell (DMFC) are reviewed, mainly focusing on the three most active areas: (1) progress in preparation methods of Pt-Ru catalysts with respect to activity improvement and utilization optimization; (2) preparation of novel carbon materials as catalyst supports to create a highly dispersed and stably supported catalysts; (3) exploration of new catalysts having a low noble metal content and non-noble metal elements through fast activity down-selection methods such as combinatorial methods.

TL;DR: In this paper, the authors compared redox flow systems in the light of characteristics such as open circuit potential, power density, energy efficiency, and charge-discharge behavior, and highlighted areas for further research.

TL;DR: Dimethyl ether can be used as a clean high-efficiency compression ignition fuel with reduced NOx, SOx, and particulate matter, it can be efficiently reformed to hydrogen at low temperatures, and does not have large issues with toxicity, production, infrastructure, and transportation as do various other fuels as discussed by the authors.

TL;DR: In this paper, a review analyzes possible scenarios that trigger such hazards before proceeding to discuss safety mechanisms such as pressure release valves, one-shot fuses, reversible and irreversible positive temperature coefficient elements, shutdown separators, chemical shuttles, non-flammable electrolytes and coatings.

TL;DR: A review of high temperature PEM fuel cells (HT-PEMFCs) from the perspective of HT-specific materials, designs, and testing/diagnostics is provided in this paper.

TL;DR: In this paper, three types of electrically conducting polymers (ECPs), i.e., polyaniline (PANI), polypyrrole (PPy), and poly-(3,4-ethylenedioxythiophene) (PEDOT) have been tested as supercapacitor electrode materials in the form of composites with multiwalled carbon nanotubes (CNTs).

TL;DR: In this paper, a review of solid electrolytes being developed for solid oxide fuel cells, including zirconia-, ceria-and lanthanum gallate-based materials, are reviewed and compared.

TL;DR: In this article, the charge storage mechanism of manganese oxide and activated carbon has been studied in aqueous medium in order to optimise an asymmetric (or hybrid) supercapacitor based on these two materials as positive and negative electrode, respectively.

TL;DR: In this article, a rigorous pseudo-two-dimensional model to simulate the cycling performance of a lithium ion cell is compared with two simplified models and the advantage of using simplified models is illustrated and their limitations are discussed.

TL;DR: In this article, the authors provide an overview of experimental work on such systems together with an outline of theoretical studies that have been undertaken to estimate the practical limits to the amount of hydrogen that could be stored per unit weight.

TL;DR: In this article, a 1D electrochemical, lumped thermal model is used to explore pulse power limitations and thermal behavior of a 6Ah, 72 cell, 276 V nominal Li-ion hybrid-electric vehicle (HEV) battery pack.

TL;DR: In this paper, a transition metal-catalyzed dissociation and hydrolysis of ammonia-borane complex (NH3BH3) at room temperature has been achieved.

TL;DR: In this paper, a silicon thin-film electrode (thickness = 200nm) is prepared by E-beam evaporation and deposition on copper foil, and the electrochemical performance of a lithium/silicon thinfilm cell is investigated in ethylene carbonate/diethyl carbonate 1.3m LiPF 6 with and without 3.5% fluoroethylene carbonate (FEC).

TL;DR: In this article, the pore size and specific surface area (SSA) of carbon effect specific capacitance and frequency response behavior of porous carbide derived carbons were investigated.

TL;DR: In this paper, the authors compared the performance of carbon nanotubes (MWNTs) and Vulcan XC-72 in terms of surface oxide formation and 30% lower corrosion current under different treatment conditions.

TL;DR: Carbon nanotubes and aerogels are also being investigated for use as catalyst support, and this could lead to the production of more stable, high activity catalysts, with low platinum loadings (< 0.1 Mg cm(-2)) and therefore low cost as mentioned in this paper.

TL;DR: In this paper, the performance of supported non-noble metals for hydrogen generation from aqueous NH3BH3 at room temperature was investigated and it was found that supported Co, Ni and Cu are the most catalytically active.

TL;DR: In this article, the effect of the charging protocol on the cycle life of a commercial 18650 Li-ion cell was studied using three methods: (1) constant current charging, (2) constant power (CP) charging, and (3) multistage constant current (MCC).

TL;DR: In this paper, a charge-discharge cycling test of a Li/LiCoO 2 cell containing ionic liquids based on bis(fluorosulfonyl)imide ([FSI] − ) as the electrolyte media, revealed significantly better rate properties compared to those of cells using conventional ionic liquid.

TL;DR: In this article, a sigma-point Kalman filter (SPKF) was proposed to estimate the state of a Li-ion polymer battery (LiPB) cell in dynamic conditions.

TL;DR: In this paper, the absolute gas permeability of several common gas diffusion layer (GDL) materials for polymer electrolyte membrane fuel cells was measured in three perpendicular directions to investigate anisotropic properties.

TL;DR: In this paper, a review of the literature on the preparation aspect of non-noble electrocatalysts for PEM fuel cell reactions, especially focusing on cathode electrocatalyst preparation methods is presented.

TL;DR: In this article, conclusive results concerning the chemical composition of the inorganic part of the solid electrolyte interphase (SEI) is described. But the results show that Li2O often reported to be present in the SEI could be an artifact from abusive Ar+ sputtering; the compound is not observed in anodes extracted from hermetically sealed cells that are never exposed to air.

TL;DR: In this article, a graphite negative electrode with bis(fluorosulfonyl)imide (FSI) as an anion and 1-ethyl-3-methylimidazolium (EMI) or N-methyl-N-propylpyrrolidinium (P-13) as a cation was used as an electrolyte.

TL;DR: The United States Department of Energy has established three centers of excellence for hydrogen storage materials development as mentioned in this paper, focusing on complex metal hydrides that can be regenerated onboard a vehicle, chemical hydride that require off-board reprocessing, and carbon-based storage materials.

TL;DR: In this paper, X-ray diffraction (XRD) was used to determine the degree of electrocatalyst sintering in polymer electrolyte membrane fuel cells (PEMFCs).

TL;DR: In this article, the surface area changes of platinum (Pt) based catalysts supported on carbon were evaluated using an accelerated durability test (ADT) and the results obtained using the ADT were correlated to the performance of the Pt-based catalysts in the fuel cell, and the Pt catalyst exhibited loss of active surface area, and a resulting decrease in the oxygen reduction reaction (ORR) activity was observed.

TL;DR: In this article, the effect of dissolution of the non-precious metal on the electrocatalytic activity of the PtCo/C catalysts was evaluated by a short test in a single PEM fuel cell.