The structural properties of pristine and graphene-coated Li(Li0.2Mn0.54Ni0.13Co0.13)O2 materials were studied by the spectroscopic methods, such as Raman spectroscopy, FTIR, and synchrotron XAS. The result from Raman spectroscopy implies that the graphene coating may suppress the monoclinic phase in the pristine material and thus lead to improved stability of the cathode. The combined analyses...

The Li1.2Mn0.54−xNbxCo0.13Ni0.13O2−6xF6x (x = 0, 0.01, 0.03, 0.05) is prepared by traditional solid-phase method, and the Nb and F ions are successfully doped into Mn and O sites of layered materials Li1.2Mn0.54Co0.13Ni0.13O2, respectively. The incorporating Nb ion in Mn site can effectively restrain the migration of transition metal ions during long-term cycling, and keep the stability of the ...

In this paper, we investigate various issues related to the design of satellite-cellular hybrid systems. First, we review the fundamental problems of channel partitioning and call admission/assignment. Second, we study the impact of di erent frequency reuse constraints, in both layers, on the optimum channel partitioning. Third, we investigate, analytically and via simulation, the e ect of redu...

In a novel design of lithium-ion batteries, hollow electrode particles coated with stiff shells are used to mitigate mechanical and chemical degradation. In particular, silicon anodes of such coreeshell nanostructures have been cycled thousands of times with little capacity fading. To reduce weight and to facilitate lithium diffusion, the shell should be thin. However, to avert fracture and deb...

Background: Fish meat is outlined with high nutritional value having essential amino acids, unsaturated fatty acids, mineral and vitamins. In this short report, we compared the meat quality of rainbow trout (Oncorhynchus mykiss) and brown trout (Salmo trutta fario) farmed in Bulgaria. Methods: Ten fishes from each species were purchased from a fish farm and their morphological parameters were ...

Production management aims to maximize profit by increasing salable output while reducing the cost related with inspection, where inspection is defined as the measurement and quality assessment of items produced. This study is based on a semiconductor production line with consecutive deteriorating machines. Each machine is inspected via the items it produces and an inspection result triggers a ...

Ahstrrrrt -The Gilbert-Elliott channel is a varying binary symmetr ic channel with crossover probabilities determined by a binary-state Markov process. In general, such a channel has a memory that depends on the transition probabilities between the states. First, a method of calculating the capacity of this channel is introduced and applied to several examples: then the question of coding is ad...

Strain-related issues are of the extraordinary importance for the performance of lithium ion batteries. For the conversionand alloy-types electrode compounds, the cracks originated from the electrochemicallyinduced-strains are considered as the primary reason for their capacity fading and short cycle life[1]. Further, the transport of lithium ions themselves is affected by the strain during ins...

The increasing frequency of new product introductions force today's companies to continuously upgrade their production capacities and system configuration. The frequent revision of production capacities and the capacity loss during this period increase the importance of ramp up duration in evaluating capacity investments. This paper aims to explore how a firm should optimally allocate its capac...