CoTe nanorods/rGO composites as a potential anode material for sodium-ion storage

Orthorhombic Cobalt Ditelluride with Te Vacancy Defects Anchoring on Elastic MXene Enables Efficient Potassium‐Ion Storage

“…where k 1 v and k 2 v 1/2 represent pseudocapacitive and diffusioncontrolled contribution, respectively. [58] As shown in Figure 3h, the pseudocapacitive contribution ratio for all samples enhances with increasing the scan rate from 0.2 to 1.1 mV s −1 .…”

“…where k 1 v and k 2 v 1/2 represent pseudocapacitive and diffusion‐controlled contribution, respectively. [ 58 ] As shown in Figure 3h, the pseudocapacitive contribution ratio for all samples enhances with increasing the scan rate from 0.2 to 1.1 mV s −1 . Particularly, the pseudocapacitive contribution to the total capacity for o ‐P‐CoTe 2 /MXene is as high as 89.9% at the scan rate of 1.1 mV s −1 , significantly larger than those of h ‐CoTe 2 /MXene (77.5%) and h ‐CoTe 2 (46.7%) (Figure S14c,d, Supporting Information).…”

“…where the b = 0.5 implies diffusion‐controlled behavior, b = 1 represents surface‐controlled charge storage or capacitance. [ 58 ] As displayed in Figure S14a,b in the Supporting Information, the calculated b values of o ‐P‐CoTe 2 /MXene for cathodic and anodic current peaks are 0.87 and 0.91, respectively, much higher than those of h ‐CoTe 2 /MXene (0.75 and 0.80) and h‐ CoTe 2 (0.52 and 0.58), suggesting that the potassium‐storage mechanism of o ‐P‐CoTe 2 /MXene is dominated by the pseudocapacitive‐controlled behavior. [ 40 ] The contributions to the capacity are further quantitatively extracted by the following equation …”

Recent advances of metal telluride anodes for high-performance lithium/sodium–ion batteries

“…8F and G). In addition, Ding et al 83 prepared 1D nanostructures including CoTe nanotubes (CTNTs) and nanorods/reduced graphene oxide (CTNR/rGO) composite (Fig. 8H) for sodium storage by a solvothermal method.…”

Graphene-based materials as electrocatalysts for the oxygen evolution reaction: a review

“…Furthermore, the resulting composite material exhibits the advantages of its two components, while eliminating their individual inadequacies, which is conducive to the enhancement of overall electrochemical water splitting activity. 30–40 Thus, due to these advantages of graphene-based composite materials, they have gain increasing attention for application in electrocatalytic water splitting and can be considered alternatives to replace the state of art electrocatalysts. Also, the combination of noble metal-based electrocatalysts with graphene composites results in the use of a comparatively lower electrocatalyst loading.…”