The growth rate of magnesium casting production in North America has averaged 16.6 percent per year over the last ten years.1-3 The fastest growing application for magnesium is the high-pressure die casting for automotive components, which represents approximately 70-80% of the magnesium casting shipments in recent years. This paper presents the latest developments in magnesium alloys, product design, casting technology, surface finishing, and magnesiummatrix composites. Current and future automotive applications of magnesium castings are also discussed.
In this work, fine powders of spinel-type LiMn 2 O 4 as cathode materials for lithium ion batteries (LIBs) were produced by a facile solution combustion synthesis using glycine as fuel and metal nitrates as oxidizers. Single phase of LiMn 2 O 4 products were successfully prepared by SCS with a subsequent calcination treatment at 600 to 1000 ºC. The structure and morphology of the powders were studied in detail by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The electrochemical properties were characterized by galvanostatic charge-discharge cycling and cyclic voltammetry. The crystallinity, morphology, and size of the products were greatly influenced by the calcination temperature. The sample calcined at 900 ºC had good crystallinity and particle sizes between 500 and 1000 nm. It showed the best performance with an initial discharge capacity of 115.6 mAh g -1 and a capacity retention of 93% after 50 cycles at a 1 C rate. In comparison, the LiMn 2 O 4 sample prepared by the solid-state reaction showed a lower capacity of around 80 mAh g -1 .
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