A High-Rate and Stable Quasi-Solid-State Zinc-Ion Battery with Novel 2D Layered Zinc Orthovanadate Array.

Zinc-ion batteries are under current research focus because of their uniqueness in low cost and high safety. However, it is still desirable to improve the rate performance by improving the Zn (de)intercalation kinetics and long-cycle stability by eliminating the dendrite formation problem. Herein, the first paradigm of a high-rate and ultrastable flexible quasi-solid-state zinc-ion battery is constructed from a novel 2D ultrathin layered zinc orthovanadate array cathode, a Zn array anode supported by a conductive porous graphene foam, and a gel electrolyte.

TMD-based highly efficient electrocatalysts developed by combined computational and experimental approaches.

As a large family of two-dimensional (2D) materials, transition metal dichalcogenides (TMDs) have been attracting an increasing level of attention and therefore considerable research input, owing to their intriguing catalytic, chemical and physical properties. The high exposed surface area, potentially large number of active sites, and chemical stability provide TMDs with vast opportunities for use as a unique class of electrocatalysts, while their low electrical conductivity and other deficiencies have drawn considerable research efforts for further modification. The optimization of TMDs can be achieved by several approaches, including site doping/modification, phase modulation, control of growth morphology and construction of heterostructures, by both appropriate computational simulations and purposely designed experimental studies.