A review on lithium -ion polymer electrolyte batteries

Battery power as a portable energy generator stands as a competitor to IC engines in view of its inherent capability to provide energy for multifarious application without atmospheric pollution. Among all the existing power sources, the recently conceived polymer electrolyte concept in the place of conventional electrolytes has paved way for the new era of Lithium-ion polymer batteries. Due to the outstanding performance of these batteries, the lithium-ion polymer battery is the future battery of the Universe. An extensive literature survey has been made in this regard and the output is presented in nutshell

Zinc-Cobalt alloy electrodeposition and characterisation

Zinc-Cobalt electrodeposits offer enhanced corrosion protection to steel, compared to zinc deposits. A near neutral zinc-cobalt alloy sulfate bath was developed. In the absence of b-naphthol and sodium lauryl sulfate (SLS), only a light grey and non-uniform deposit was obtained. Addition of boric acid yielded a grey and uniform deposit. To obtain the grey uniform alloy deposit, the optimum bath composition was: 0.5 M ZnSO4, 0.5 M CoSO4, 40 g/L H3BO3, 0.865 g/L SLS and 0.345 b-naphthol. The current efficiency for alloy deposition was 50% in the current density range 0.5-2.5 A/dm2. X-ray fluorescene studies on the alloy deposit formed on steel revealed 58-75% zinc on the surface. Anodic stripping voltammetris studies were carried out on zinc-cobalt alloy films formed on glassy carbon to identify the phases formed in the alloy. Zn-Co alloy film dissolution peaks suggested the existence of b, b1 and r phases of the alloy

Analytical and Experimental Study on Cold-Formed Steel Built-Up Sections for Bending

In the construction of steel structures, the two most common types of structural members are hot-formed and cold-formed members. This paper mainly describes the analytical and experimental research on the strength and characteristics of CFS bolted built-up sigma sections having different structural arrangements under bending. The cross-sectional dimensions for the parametric study were selected by the sizes available in the market. In this paper, ANSYS workbench software was used to perform FE modeling and observe the local, flexural, and interaction of these buckling. Then, experimental study was performed by varying the arrangement of open section beams between face-to-face and back-to-back, connected using bolts or fasteners different spacings. Further, we conducted bending tests on cold-formed steel built-up members having simple edge stiffeners in the middle. Comparing both analytical and experimental studies, the results indicate that the back-to-back connected built-up beam section provides a flexural capacity higher than the face-to-face built-up section. Moreover, increasing the bolt spacing enhanced the load-carrying capacity of back-to-back sigma section built-up beams. It has also been discovered that the flexural strength of beams is primarily determined by bolt spacing or itsposition