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Full-Text Articles in Engineering
High Performance Li4ti5o12/Si Composite Anodes For Li-Ion Batteries, Chunhui Chen, Richa Agrawal, Chunlei Wang
High Performance Li4ti5o12/Si Composite Anodes For Li-Ion Batteries, Chunhui Chen, Richa Agrawal, Chunlei Wang
Department of Mechanical and Materials Engineering
Improving the energy capacity of spinel Li4Ti5O12 (LTO) is very important to utilize it as a high-performance Li-ion battery (LIB) electrode. In this work, LTO/Si composites with different weight ratios were prepared and tested as anodes. The anodic and cathodic peaks from both LTO and silicon were apparent in the composites, indicating that each component was active upon Li+ insertion and extraction. The composites with higher Si contents (LTO:Si = 35:35) exhibited superior specific capacity (1004 mAh·g−1) at lower current densities (0.22 A·g−1) but the capacity deteriorated at higher current densities. On the other hand, the electrodes with moderate Si …
Modeling And Simulation Of Enzymatic Biofuel Cells With Three-Dimensional Microelectrodes, Yin Song, Varun Penmatsa, Chunlei Wang
Modeling And Simulation Of Enzymatic Biofuel Cells With Three-Dimensional Microelectrodes, Yin Song, Varun Penmatsa, Chunlei Wang
Department of Mechanical and Materials Engineering
The enzymatic biofuel cells (EBFCs) are considered as an attractive candidate for powering future implantable medical devices. In this study, a computational model of EBFCs based on three-dimensional (3-D) interdigitated microelectrode arrays was conducted. The main focus of this research is to investigate the effect of different designs and spatial distributions of the microelectrode arrays on mass transport of fuels, enzymatic reaction rate, open circuit output potential and current density. To optimize the performance of the EBFCs, numerical simulations have been performed for cylindrical electrodes with various electrode heights and well widths. Optimized cell performance was obtained when the well …