Showing papers in "Journal of Power Sources in 2011"

TL;DR: In-situ high-resolution transmission electron microscopy (HRTEM) studies of the structural transformations that occur during the synthesis of carbon-coated LiFePO4 and heat treatment to elevated temperatures were conducted in two different electron microscopes as discussed by the authors.

TL;DR: In this paper, the authors highlight the recent progress in improving and understanding the electrochemical performance of various alloy anodes, and the causes of first-cycle irreversible capacity loss are discussed.

TL;DR: Experimental results indicated that the capacity loss was strongly affected by time and temperature, while the DOD effect was less important, and attempts in establishing a generalized battery life model that accounts for Ah throughput, C-rate, and temperature are discussed.

TL;DR: A review of the current literature concerning the electrochemical application of graphene in energy storage/generation devices, starting with its use as a super-capacitor through to applications in batteries and fuel cells, depicting graphene's utilisation in this technologically important field is presented in this article.

TL;DR: In this article, the recent progress of anode/cathode materials and filling materials as three-dimensional electrodes for microbial fuel cells has been systematically reviewed, resulting in comprehensive insights into the characteristics, options, modifications, and evaluations of the electrode materials and their effects on different actual wastewater treatment.

TL;DR: Li-ion battery prognostics and health monitoring have received more and more attention from a wide spectrum of stakeholders, including federal/state policymakers, business leaders, technical researchers, environmental groups and the general public.

TL;DR: In this article, a new method for state of health (SOH) and remaining useful life (RUL) estimations for lithium-ion batteries using Dempster-Shafer theory (DST) and the Bayesian Monte Carlo (BMC) method is proposed.

TL;DR: In this paper, the influence of the operation conditions temperature and state of charge (SOC) on the performance of a commercial high-power lithium-ion cell is investigated by electrochemical impedance spectroscopy.

TL;DR: Li-air batteries are potentially viable ultra-high energy density chemical power sources, which could potentially offer specific energies up to ∼3000 Wh−kg−1 being rechargeable as mentioned in this paper.

TL;DR: A new battery thermal management method using a reciprocating air flow for cylindrical Li-ion (LiMn 2 O 4 /C) cells was numerically analyzed using a two-dimensional computational fluid dynamics (CFD) model and a lumped-capacitance thermal model for battery cells and a flow network model.

TL;DR: Graphene and polypyrrole composite (PPy/GNS) is synthesized via in situ polymerization of pyrrole monomer in the presence of graphene under acid conditions.

TL;DR: In this paper, Li7−XLa3(Zr2−X, NbX)O12 was synthesized by a solid-state reaction, and their lithium ion conductivity was measured using an AC impedance method at temperatures ranging from 25 to 150°C in air.

TL;DR: In this paper, two different equivalent circuit (EC) models are built up and parameterized for a commercial 6.5 Ah high-power lithium-ion cell and measured impedance spectroscopy data depending on temperature and state of charge (SOC) are used for parameter estimation.

TL;DR: In this article, the structure and electrochemical performance of LiFePO 4 are reviewed in light of the major technical requirements for EV batteries, including rate capability, capacity density, cyclic life and low-temperature performance.

TL;DR: The challenges for further development of Li rechargeable batteries for electric vehicles are reviewed in this paper, which requires development of a nonflammable electrolyte with either a larger window between its lowest unoccupied molecular orbital and highest occupied molecular orbital (HOMO) or a constituent (or additive) that can develop rapidly a solid/electrolyte-interface (SEI) layer to prevent plating of Li on a carbon anode during a fast charge of the battery.

TL;DR: LiNO3 is selected as the additive to modify the electrolyte for lithium sulfur battery as mentioned in this paper, which shows improved cycling performance with the coulombic efficiency above 95% and highly stable reversible discharge capacity of ca. 527 mg−1 after 50 cycles.

TL;DR: In this paper, a serpentine-channel cooling plate is modeled parametrically and its characteristics assessed using computational fluid dynamics (CFD) and numerical optimization is carried out by allowing the channel width and position to vary.

TL;DR: In this article, Li bis(fluorosulfonyl)imide (LiFSI) has been studied as conducting salt for lithium-ion batteries, in terms of the physicochemical and electrochemical properties of the neat LiFSI salt and its nonaqueous liquid electrolytes.

TL;DR: In this article, an electrodeposition process of magnesium metal from Grignard reagent based electrolyte was studied by comparing with lithium, and the results indicated that the dependency of the overpotential on the electrolyte concentration prevent the locally concentrated current resulting to form very uniform deposits.

TL;DR: In this paper, the authors highlight the use of electrospinning to create materials suited for four major energy-related applications: fuel cells, dye-sensitized solar cells, Li-ion batteries, and supercapacitors.

TL;DR: In this paper, a sulfur-graphene (S-GNS) composites have been synthesized by heating a mixture of graphene nanosheets and elemental sulfur.

TL;DR: In this article, the recent progress of electrocatalysis of palladium-based materials including both extended surfaces and nanostructured ones for hydrogen oxidation reaction (HOR) and oxygen reduction reaction (ORR) is summarized.

TL;DR: In this article, a comparative study of dealloyed binary PtM3 (M = Co, Cu, Ni) electrocatalyst for use in PEMFC cathodes is presented.

TL;DR: In this article, the authors examined the problem of optimizing the charge pattern of a plug-in hybrid electric vehicle (PHEV), defined as the timing and rate with which the PHEV obtains electricity from the power grid.

TL;DR: In this paper, a high capacity prismatic LiFePO 4 cell with deep cycling at elevated temperature of 50°C was studied by electrochemical impedance spectroscopy as well as capacity and power fading characterization at different test temperatures (45, 25, 0 and −10°C).

TL;DR: In this paper, a special purpose model deduced from an equivalent circuit is developed, which contains parameters depending on the degradation of the battery cell, and a degradation index is calculated by compensating other influences, e.g. battery temperature.

TL;DR: The results show that the array of CuO nanosheets forms a uniform film of around 5 μm in thickness on nickel foam skeleton and exhibits a specific capacitance of 569 F g−1 at a current density of 5 mA cm−2 in 6.0 mol dm−3 KOH electrolyte.

TL;DR: In this paper, LiFePO 4-based cathode active materials with emphasis on their specific open-circuit-voltage (OCV) characteristics including hysteresis and special OCV recovery effects, which last for several minutes or even hours after a current load is interrupted.

TL;DR: In this article, two types of 10-Ah single cells (one prismatic and another cylindrical) from two manufacturers were tested at room temperature and 60°C. The results were analyzed using incremental capacity analysis (ICA) along with other electrochemical techniques.

TL;DR: In this paper, the impact of battery second use on the initial cost of plug-in hybrid electric vehicles (PHEVs) to automotive consumers is investigated and the potential for grid-based energy storage applications to serve as a market for used PHEV/EV batteries is explored.