Cd|KOH|NiOOH

Zn|NH4CI|MnO2

Li|LiClO4|MnO2

Pb|H2SO4|PbO2

H2|KOH|O2

сепаратор

Obtaining a Fibrous Polymeric Material from a Mixture of Polyvinylidene Fluoride and Polystyrene by Capillary-free Electrospinning for a Sealed Lead-Acid Accumulator Separator

The paper considers the most significant properties of moulding solutions based on a mixture of polyvinylidene fluoride and polystyrene for the process of capillary-free electrospinning nonwoven materials. It has been shown that the material obtained from the mixed solution of polyvinylidene fluoride and polystyrene in the ratio of components 0.75 : 0.25 is the largest porous, the diameter of the fibers is in the widest range from 0.14 to 2.8 μm, and branching of the fibers is observed.

Efficiency of Oxygen Ionization in the Mock-up of Lead-Acid Battery with Use Separator from Absorptive Glass Mat and Non-Woven Fibrous Materials Based on Polyvinylidenfluoride and Polystyrene

The efficiency of oxygen ionization in a lead-acid mock-up was studied using a separator based on an absorptive glass mat (AGM) and polymer non-woven fibrous materials based on F-2M polyvinylidene fluoride and polystyrene. Fibrous material obtained by capillary-free electrospinning. The technological and structural characteristics of the polymer material are investigated. It was found that the use of a sandwich polymer/AGM/polymer separator significantly increases the efficiency of oxygen ionization.

/The effect of modified absorbtive glass mat separators on the efficiency of hydrogen ionization in lead-acid battery mock-ups

The influence of porous structure of the absorptive glass mats manufactured by «Hollingsworth&Vose» (thickness 2.8 mm) and BernardDumas» (thickness 3.0 mm), modified by impregnation with polymeric emulsions on the basis of polyvinylidene fluoride (KYNAR), polyvinylpyrrolidone copolymer with styrene (PVS) and polytetrafluoroethylene (Tf), on the efficiency of ionization of hydrogen in lead-acid battery mock-ups. The use of polymer modified emulsions separators from absorbtive glass mat allows to increase the ionization rate of hydrogen on lead-dioxide electrode.

Electrochemical and mass-transfer processes in the system of electrochemical synthesis of nickel hydroxide

Mass-transfer processes are considered in a double-chamber running electrolyzer for the synthesis hydroxide of nickel (ІІ) from solution of NiSO4. The product of Ni(ОН)2 appears at co-operation of ions of Ni2+ the ions of ОН-, which are generated on a cathode. The mathematical model of processes is formulated. Decisions show dependence of concentrations of ions in a reactionary area from the managed parameters of process and current.

The experimental study of the process of electrochemical syntheses of nickel hydroxide

Work of running double-chamber electrochemical reactor is investigational for an electrosynthesis Ni(OH)2. It is shown that the basic parameter of the mode is a relative current is attitude of current of I toward the theoretical equivalent current of I*, at that fully initial reagents are expended in a reactor. Mode of I/I* = 1 differentiates two areas (I < I* and I > I*) with salutatory and like changing physical and chemical and electrochemical properties Ni(OH)2.

Influence of pressure on structural characteristics of separation materials and oxygen ionization rate in the electrode block of the lead-acid accumulator

In this article was studied pressure influence in the electrode block of the model of the lead-acid accumulator on the most important physical properties (a specific surface, pore size distribution, compression properties, speed of capillary lifting of electrolyte) of absorbent glass mat separators of the trademarks «Hollingsworth» (USA) and "Bernard Dumas"(France) and on efficiency of an oxygen cycle. It is shown that the highest compression properties separators with a high specific surface (7-10 m2/g) possess. The increase of pressure in the electrode block conducts to pores size redistribution towards decrease in a share of a pore with a radius of 10-15 microns and increase in a share of smaller pore with radius of 1-5 microns. Observed reduction of a share of a large pore explains decrease in height and speed of lifting of electrolyte with higher pressure in the electrode block. The increase of pressure in the electrode block to 50 kPa leads to decrease oxygen ionization rate on a lead electrode.

Oxygen and hydrogen ionization on the working electrodes of the lead-acid battery

Some useful characteristics of the separators from glass-absorptive matrices produced by several manufacturers and intended for valve-regulated lead-acid batteries were studied, namely, compressibility, electrolyte capacity, capillary rise speed, oxygen absorption rate on the lead electrode, and hydrogen absorption rate on the lead-dioxide one. The usage of these separators provides forced pumping of the gases released (oxygen and hydrogen) to the absorptive electrode's pores and allows the oxygen and hydrogen ionization rates to be raised.