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The thermo-electrochemical characteristics of prismatic lithium-ion batteries is numerically simulated to quantify the degradation and thermal runaway at wide temperature range from − 40 to 80 °C and 150 °C. The numerical simulation describes the effect of temperature on the cell voltage, overpotential and heat generation during charge/discharge process. It is found that the subzero temperature significantly...
Three-dimensional (3D) additive manufacturing technologies are useful for building various and complicated shapes. Representative technologies include laser metal deposition and selective laser sintering that make metal powders melt in order to form diverse 3D structures. Although numerous well-known advantages of 3D additive manufacturing, they still have some difficulties in surface quality improvement...
Infiltration-based composite electrodes are one of the most promising structures to obtain solid oxide fuel cells (SOFCs) with high performance. For a rational design of advanced composite electrodes, we report here a comprehensive model based on fluid mechanics by using the Peclet number and contact angle hysteresis to precisely control the morphologies of the infiltrated nanoparticles. Depending...
The triboelectric effect utilizes the electric potential of materials to generate an electrical output through electrostatic induction between the two oppositely charged surfaces, which grants them unique self-powered characteristics. By utilizing this effect, self-powered tactile sensors have been studied in the previous researches. However, the conventional triboelectric tactile sensors have drawbacks...
Energy and time savings are highly important aspects of green manufacturing. Ultrasonic vibration-assisted grinding (UVAG) is a high-efficiency, low-energy-consumption processing method for optical components made from hard and brittle materials. This work presents an experimental investigation of the specific grinding energy and the subsurface damage depth in UVAG of optical glasses to estimate the...
This paper focuses on finding a suitable drill bit for drilling Carbon Fiber Reinforced Plastic (CFRP). The drilling characteristics of the dagger drill, the double point angle drill, and the candle stick drill are studied. The results show that the side edge has poor ability to remove burrs, and the tip structure of the outer corner of the candle stick drill can greatly reduce the entry damage. However,...
This paper aims to reduce the carbon emission of the manufacturing process and to achieve the low carbon optimization decision of the machining process route. Carbon emission was analyzed from the perspective of material flow, energy flow and environmental flow, and the machining process route carbon efficiency model was established based on the one from per unit cutted-volume. A multi-objective machining...
Titanium alloys are generally known as difficult-to-machine materials because of their low machinability ratings. Their usage is favored for demanding sectors because of their high strength to weight ratio, high corrosion resistance and ability to operate at elevated temperatures. Machining of titanium alloys results in higher environmental burden, because they require high energy and generous amount...
Fiber is a crucial element in biological micro-structural materials. Replication of fiber-reinforced composites with analogous architectures of their natural counterparts has caused widespread academic concern. Recent researches indicate 3D printing technology has the potential to produce biomimetic structural materials. The aim of this study is to develop a process to fabricate fiber-reinforced composites...
The study of natural fiber composite in the field of materials has indeed sparked interest among many due to its essential biodegradability feature. As such, pineapple leaf fiber (PALF) is not only biodegradable, but also environmental friendly, as opposed to synthetic fiber. Hence, this paper investigates the effect of fiber loading, as well as the inclusion of maleic anhydride polyethylene (MAPE)...
The effects of water-containing I−/I3− liquid electrolytes on the photovoltaic performance and long-term stability of ruthenium based complex Z907 dye was examined in dye-sensitized solar cells (DSSCs). Despite of high water content up to 60 vol% in organic solvent-based liquid electrolyte, the photovoltaic properties and long-term stability measured under the standard global (G) air-mass (AM) 1.5...
Polylactic acid (PLA) formulated from corn starch has a bright potential to replace the non-renewable petroleum-based plastics. The combination of PLA and natural fibre has gained interest due to its unique performance, as reported in many researches and industries. Meanwhile, rice husk produced as the by-product of rice milling can be utilised, unless it is turned completely into waste. Therefore,...
Origami and kirigami originally serving as the ancient papercraft techniques also provide the way of developing functional hierarchical structures for various engineering applications, for example, stretchable energy devices, wearable sensors, and self-folding scaffolds with tissue engineering, etc. The techniques based on origami/kirigami concept involve folding and cutting of substrates to provide...
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