Structural changes of active materials and failure mode of a valve-regulated lead-acid battery in rapid-charge and conventional-charge cycling

Chang, Ting‐Hsiang; Jochim, D.M.

doi:10.1016/s0378-7753(00)00470-5

Cited by 12 publications

(4 citation statements)

References 17 publications

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“…This is consistent with an impedance curve for the limited diffusion with an ideal reservoir at the boundary [20], which indicates that the limited diffusion in the pores of the electrodes is the ratedetermining step in both cases. The difference in the impedance spectrum may imply that the two electrodes have different pore structure parameters [21,22]. When the electrodes at fully discharged states were used as the working electrodes, the shapes of the Nyquist plots are semicircle, as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Influence of pitch-based carbon foam current collectors on the electrochemical properties of lead acid battery negative electrodes

Chen

et al. 2008

J Appl Electrochem

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Pitch-based carbon foams prepared by a template method were used as negative current collectors to assemble flooded lead acid batteries, and the effect of the current collectors on the performance of the negative electrodes was investigated. Comparative galvanostatic charge-discharge tests show that the utilization efficiencies of the active material on the carbon foam negative current collector are 14% and 30% higher than those of the material on a lead grid one at 20 and 10 h discharge rates, respectively. Further EIS tests imply that there are also significant differences in the impedance spectra between the two electrodes. SEM images reveal that at the fully charged state, the particle size of the active material formed on the carbon foam current collector is much more uniform than that on the lead grid.

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Section: Resultsmentioning

confidence: 99%

Influence of pitch-based carbon foam current collectors on the electrochemical properties of lead acid battery negative electrodes

Chen

et al. 2008

J Appl Electrochem

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“…Although there are many failure modes of VRLA batteries, including premature capacity loss (PCL), grid corrosion, softening, sulfation, drying out, additive decomposition and poor separatorplate contact, etc., they vary with different designs, manufacturing and operating conditions [7][8][9][10][11][12][13][14][15]. In the deep cycle duty, the interface of the grid/active mass easily accumulates the lead sulfate crystals with very high resistance and forms a barrier layer when Pb-Sb alloys in the positive grid are substituted by Pb-Cd-Sn-Al alloys.…”

Section: Introductionmentioning

confidence: 99%

“…Water loss depends on the grid compositions, impurities, battery temperature and charge voltage [8]. The suitable charge regime including fast charge is very important for prolonging the battery cycle life [13]. For the practice operating of electric bicycle batteries, their discharge current depends on the electromotor power and the accelerating processes.…”

Section: Introductionmentioning

confidence: 99%

Failure modes of valve-regulated lead-acid batteries for electric bicycle applications in deep discharge

Guo

Tang

Meng³

et al. 2009

Journal of Power Sources

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“…[1][2][3] Separator degradation has been often observed in certain types of batteries, and shown to be responsible for battery failure or power loss. Examples of work in this field refer to separator studies in valve-regulated lead acid ͑VRLA͒, [4][5][6][7][8][9] bipolar lead acid, 10 nickel/metal hydride, [11][12][13] iron-chromium, 14,15 nickel-cadmium, 16 and silver-zinc 17 cells. The primary causes of separator degradation are usually attack by electrolyte, dendrite growth through separator pores, structural degradation caused by high temperature or cycling, and the clogging of separator passageways during cycling.…”

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confidence: 99%

Diagnostic Studies of Polyolefin Separators in High-Power Li-Ion Cells

Kostecki

Norin

Song

et al. 2004

J. Electrochem. Soc.

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The decrease of ionic conductivity of polymeric separators in high-power Li-ion cells, which were cycled or stored at elevated temperatures, was accompanied by dramatic changes in separator surface morphology. The source and nature of polymer separator degradation in high-power Li-ion batteries have been studied. We attributed the observed porosity loss to a deposit, which precipitated onto the separator surface from the electrolyte and clogged separator pores. This deposit resulted from a homogenous decomposition process of the LiPF 6 -ethylene carbonate-ethyl-methyl carbonate electrolyte, which was significantly accelerated at elevated temperatures. The electrolyte decomposition products consisted of lithium halophosphates and displayed very strong fluorescence. They contributed to the solid electrolyte interphase layers on both cathode and anode where they underwent further oxidation or reduction reactions, respectively.

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Structural changes of active materials and failure mode of a valve-regulated lead-acid battery in rapid-charge and conventional-charge cycling

Cited by 12 publications

References 17 publications

Influence of pitch-based carbon foam current collectors on the electrochemical properties of lead acid battery negative electrodes

Influence of pitch-based carbon foam current collectors on the electrochemical properties of lead acid battery negative electrodes

Failure modes of valve-regulated lead-acid batteries for electric bicycle applications in deep discharge

Diagnostic Studies of Polyolefin Separators in High-Power Li-Ion Cells

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