Yiling Dai

Abstract: As the need for higher energy density batteries increases, there have been numerous attempts at tuning the design of the battery electrodes to improve performance. Increasing the electrode loading remains a straightforward method to increase the energy density. Li-ion batteries are typically liquid phase limited; therefore, battery designers attempt to increase the electrode thickness and decrease the porosity until polarization losses become significant. It is in this context that a graded porosity, with varying porosity across electrode, has been explored to reduce liquid phase limitations and thereby decrease the polarization losses. In the literature, mathematical models have been used to suggest that varying porosity designs can lead to improved energy density. In this paper we show that such an enhanced improvement is an artifact of the previous models using arbitrary base cases, and that a similar improvement in energy is readily achievable by judicious choice of a constant porosity. A more careful comparison, as shown in this paper, suggests only a marginal improvement in energy density. Here, we show the methodology used to reach this conclusion and detail the underlying reason for this result.

TL;DR: In this article, an inner coating method was developed to synthesize electrode materials for lithium ion batteries, which can not only improve electronic and ionic conductivity, increase the reactive area, but also accommodates volume changes associated with active materials.

TL;DR: In this article , NixCo3-xO4 catalysts were synthesized to elucidate the influence of oxygen vacancies on catalyst activities and reaction mechanisms for ethane combustion.

TL;DR: Its excellent electrochemical performance makes LVP@CNT a promising cathode candidate for lithium-ion batteries, and the carbon materials can maintain their original morphology even after oxidation and high-temperature sintering.