Lattice Structural Stability Research Articles

GeP3/NbX2 (X=S, Se) Nano-Heterostructures: Promising Isotropic Flexible Anodes for Lithium-Ion Batteries with High Lithium Storage Capacity.

A new trend is emerging that flexible batteries will play an indispensable role in the progress of social science and technology. However, flexibility exists only in a single direction for the existing electrode material. Searching for flexible battery materials has attracted more and more attention from researchers. In this article, the lattice structural stability, electronic structure modulation, and the Li adsorption properties of the heterostructures designed by assembling GeP3 and NbX2 (X = S, Se) together were methodically explored based on van der Waals. We found that diffusion barrier of the GeP3/NbS2 heterostructure with metallic properties is 0.21 eV for Li. It greatly improves the charge and discharge performance of the battery. The predicted heterostructure shows quite high theoretical specific capacity with 540.24 mA h/g, which is higher than the traditional graphite anode (372 mA h/g). It demonstrates superior isotropic flexibility with a considerable small Young’s modulus (151.98–159.02 N/m), which has promising application as flexible electrodes for rechargeable battery equipment.

Stability of Lattice Structures Under Combined Loads

The stability of elastic structures under multiple independent loads is considered. Interaction effects of the independent loading parameters are examined in terms of stability boundaries, which separate regions of stable and unstable load combinations in the load space. The convexity properties of these stability boundaries are discussed in general, both for linear and nonlinear systems. A reticulated dome subjected to vertical loads is then analyzed numerically. The dome exhibits nonlinear prebuckling deformations. Static perturbation and nonlinear programming methods are utilized to compute buckling loads. Results are presented for two and three independent load configurations, and the characteristics of the stability boundaries are discussed. Finally, the interactions for the reticulated dome are compared to those for shallow arches.