Search results for "batteri"
showing 10 items of 152 documents
LEAD-ACID BATTERIES WITH NANOSTRUCTURED ELECTRODES
2020
Ultrafast lead-acid battery with nanostructured Pb and PbO2 electrodes
2018
Lead-acid batteries (LABs) are still extensively used in the field of energy storage, owing to a well-known and reliable technology. LABs can deliver high power and store energy for a very long time. In addition, they are reliable and easy to produce. The raw materials for their manufacture are practically unlimited, and about 95% of the materials can be recovered and reused. However, the lower specific energy storage (about 30-40 Wh kg-1), in comparison with other storage systems, limits their use in the most emerging and challenging applications, like electrical mobility, due to the high atomic weight of lead [1]. One of the principal limitations in the use of LABs in electric vehicles (E…
ULTRAFAST LEAD ACID BATTERIES USING NANOSTRUCTURED ELECTRODES
2012
Fabrications of Nanostructures And Nano-Structured Devices Using Electrochemical Methods
2013
Nanostructured Lead Electrodes with Reduced Graphene Oxide for High-Performance Lead–Acid Batteries
2022
Nanostructured Pb electrodes consisting of nanowire arrays were obtained by electrodeposition, to be used as negative electrodes for lead–acid batteries. Reduced graphene oxide was added to improve their performances. This was achieved via the electrochemical reduction of graphene oxide directly on the surface of nanowire arrays. The electrodes with and without reduced graphene oxide were tested in a 5 M sulfuric acid solution using a commercial pasted positive plate and an absorbed glass mat separator in a zero-gap configuration. The electrodes were tested in deep cycling conditions with a very low cut-off potential. Charge–discharge tests were performed at 5C. The electrode wi…
Nanostructured anode and cathode materials for Li-ion batteries
2010
Sn-Co nanowire-based anodes for lithium-ion batteries
2010
The demand of improvement in lithium-ion battery technology in terms of specific capacity and safety has stimulated the search for anode materials alternative to graphite. Among them, tin-based materials have been widely studied because tin can intercalate lithium up to atomic ratio Li/Sn of 4.4 to deliver a impressive specific capacity of 993 mAhg−1 (while graphite gives 372 mAhg−1). Unfortunately the high volume change of about 300%, which is related to the insertion/removal of lithium, causes the alloy pulverization and loss of electric contact that causes a poor cycle life. The synthesis of nanometric materials, intermetallic compounds and carbon composites are strategies that have been…
Accumulo e conversione di energia per via elettrochimica attraverso batterie piombo-acido con elettrodi nano-strutturati
L’attività di ricerca si è focalizzata sullo studio delle batterie al piombo acide, largamente utilizzate nel campo della trazione e dell’accumulo di energia da fonti rinnovabili. La loro grande limitazione è legata al peso, intrinsecamente dovuto all’alto peso molecolare del piombo stesso, e al basso grado di utilizzazione del materiale attivo, che non le rendono competitive in altri possibili ambiti come la trazione elettrica o in dispositivi portatili. Per superare questa limitazione l’approccio è stato quello di rendere porosa la materia attiva mediante l’uso di array ordinati di nanostrutture ottenute per elettrodeposizione; mediante l’uso di uno stampo, è possibile ottenere elettrodi …