Synthesis of porous CoMoO₄nanorods as a bifunctional cathode catalyst for a Li–O₂battery and superior anode for a Li-ion battery

Abstract

We report the synthesis of porous CoMoO nanorods and their applications in lithium oxygen (Li-O) and lithium ion (Li-ion) batteries. The unique porous structures of CoMoO nanorods can promote the permeation of electrolyte and benefit the transport of lithium ion. When employed as the cathode catalyst for a Li-O battery, CoMoO nanorods deliver an improved discharge capacity (4680 mA h g), lower charge potential and better cycle stability (41 cycles at 500 mA h g capacity limit) compared with the bare carbon. When employed as an anode in Li-ion batteries, CoMoO nanorods can retain a capacity of 603 mA h g after 300 cycles (400 mA g) and exhibit excellent rate capability.

Two-dimensional MoS2 electromechanical actuators

“…The opposite is the situation for materials with negative Poission's ratio. We note that beside our study, there have been reports that Poisson's ratio can be negative in other 2D materials such as in black phosphorus (ν = −0.5) [30], single-layer graphene ribbons (ν = −1.51) [31], and δ-phosphorene (ν = −0.267) [32]. We expect that exploring 2D materials with negative Poission's ratio could have useful applications, for example, as vanes for aircraft gas turbine engines, sponges, and fasteners [33].…”

Electronic and mechanical properties of few-layer borophene

“…For few-layer borophene, it is surprising to find that the negative in-plane Poisson's ratio in monolayer borophene dramatically changes into positive, for example, 0.052 along [100] and 0.020 along [010] directions in bilayer borophene, as shown in Table I. We should emphasise that this observation is totally different from other 2D materials, even for puckered black phosphorus and arsenene in which the negative Poisson's ratios are preserved from monolayer to multilayer 56,57 . In order to check the reliability of the positive Poisson's ratio in fewlayer borophene, we show in Fig.…”

Synthesis of graphene wrapped porous CoMoO4 nanospheres as high-performance anodes for rechargeable lithium-ion batteries

“…21-0868). [31][32][33][34] In addition, the XRD pattern of pure CoMoO 4 was also displayed in Fig. S2, † which further conrm the high purity of the obtained products.…”