Semnan University Press Applied Chemistry Today 2981-2437 5 16 2010 09 23 Age of lithium batteries Age of lithium batteries 13 30 574 10.22075/chem.2017.574 FA Eftekhari . Rajabzadeh Hosseinpoor Zaryabi Journal Article 2017 01 15 A battery is a chemical device for the storage of the electricity. Since electricity cannot be stored directly (except in electrolytic capacitors and super conducting coils) it is necessary to utilize an indirect form of storage. Possibilities include the conversion of electrical energy into potential energy, thermal energy or chemical energy. Electrolysers and fuel cells are, like batteries, electrochemical energy-conversion devices.There are two useful ways in which to categorize batteries. The first is “primary batteries”, which are discharged once and then discarded, and secondary batteries, which are recharged and thus used many times. Over the past decade there has been a growing interest in Lithium batteries. Since the early1990s, when Sony manufactured the first commercial lithium ion battery, extensive efforts have been undertaken to improve battery performance. This paper summarizes the materials processing technique applied to the fabrication of lithium ion batteries and the methods for improve the battery performance are introduced. A battery is a chemical device for the storage of the electricity. Since electricity cannot be stored directly (except in electrolytic capacitors and super conducting coils) it is necessary to utilize an indirect form of storage. Possibilities include the conversion of electrical energy into potential energy, thermal energy or chemical energy. Electrolysers and fuel cells are, like batteries, electrochemical energy-conversion devices.There are two useful ways in which to categorize batteries. The first is “primary batteries”, which are discharged once and then discarded, and secondary batteries, which are recharged and thus used many times. Over the past decade there has been a growing interest in Lithium batteries. Since the early1990s, when Sony manufactured the first commercial lithium ion battery, extensive efforts have been undertaken to improve battery performance. This paper summarizes the materials processing technique applied to the fabrication of lithium ion batteries and the methods for improve the battery performance are introduced. https://chemistry.semnan.ac.ir/article_574_14b94a8dd314d0d1d8bb7179cb84dc20.pdf

Semnan University Press Applied Chemistry Today 2981-2437 5 16 2010 09 23 Salt sensitivity, pH responsivity and kinetic study of chitosan-g-PAA hydrogel Salt sensitivity, pH responsivity and kinetic study of chitosan-g-PAA hydrogel 31 42 575 10.22075/chem.2017.575 FA Morteza Nasrolahi Morteza Nasrolahi Zahra Talebi Journal Article 2017 01 15 Acrylic acid (AA) monomer was directly grafted onto chitosan using ammonium persulfate (APS) as an initiator and methylenebisacrylamide (MBA) as a crosslinking agent under an inert atmosphere. Two factors affecting the swelling capacity of the obtained hydrogel, AA and MBA concentrations, were studied. The polymer structures were characterized by FTIR spectroscopy. Maximum water absorbency of the optimized final product was found to be 434 gr/gr. Also, I studed manner swelling of product in different solution salty. results shown that the swelling capacity decreased with increasing of ionic strength. Farthermore, the swelling of superabsorbant hydrogel was measured in various Solutions with PH values ranging from 1 to 12. the hydrogels exhibited the highest swelling at PH 3 and8. also the swelling kinetics in distilled water investigated. Acrylic acid (AA) monomer was directly grafted onto chitosan using ammonium persulfate (APS) as an initiator and methylenebisacrylamide (MBA) as a crosslinking agent under an inert atmosphere. Two factors affecting the swelling capacity of the obtained hydrogel, AA and MBA concentrations, were studied. The polymer structures were characterized by FTIR spectroscopy. Maximum water absorbency of the optimized final product was found to be 434 gr/gr. Also, I studed manner swelling of product in different solution salty. results shown that the swelling capacity decreased with increasing of ionic strength. Farthermore, the swelling of superabsorbant hydrogel was measured in various Solutions with PH values ranging from 1 to 12. the hydrogels exhibited the highest swelling at PH 3 and8. also the swelling kinetics in distilled water investigated. https://chemistry.semnan.ac.ir/article_575_400314bb0db15ff70accb2a4091cb434.pdf