Trash to treasure: Carbon-free ZnSe derived from waste zinc foil as a high-rate and long-life anode material enabling fast-charging sodium-ion batteries

Facile Development of Disused Nickel Foams into Low-Cost and High-Performance Electrode Materials for Sodium-Ion Batteries

“…SEM images of the NiSe electrode after 10 and 50 cycles show that the size is not drastically changed and the morphology can be maintained. The stable structure can accomplish a long-cycle life during the repeated (de)embedding of Na + …”

“…The stable structure can accomplish a long-cycle life during the repeated (de)embedding of Na + . 37 CVs performed at different sweep speeds provide a detailed explanation for the exceptional rate capability of NiSe-850°C-4 h. Evidently, CVs exhibit comparable contours in Figure 4a, demonstrating decent reaction kinetics throughout the charge−discharge procedures. 38 The specific pseudocapacitive contribution ratio can be quantified by the dependence of the peak current on the sweeping speed.…”

From crystalline to amorphous: heterostructure design of MoO2/MoS2in situ supported by nitrogen-doped carbon with robust sodium storage at −40 °C

“…2j proves the coexistence and uniform distribution of elements Mo, O, S, C and N, thus demonstrating high agreement with its chemical components. 50,52 Based on the CHN elemental analysis report, the overall contents of C and N in the a-MoO 2 / MoS 2 @NC hybrid material was estimated to be 15.36 and 3.46 wt%, respectively, as depicted in Table S1 (ESI †). In principle, the carbonaceous matrix can not only modify the electronic conductivity of the hybrid electrode but also provide an effective buffering space for structural changes upon cycling, thus ensuring high electrochemical activity.…”

“…S11 (ESI †), with the decrease of the operating temperature, the ionic conductivity of the electrolyte decreases from 7.086 mS cm −1 (25 °C) to 1.138 mS cm −1 (−40 °C), mainly originating from the low operating temperature induced high viscosity and sluggish diffusion kinetics. 52 In spite of the decreased ionic conductivity, the electrolyte still remained in the liquid state at −40 °C, thus guaranteeing the reversible electrochemical redox upon sodium storage. 38 As expected, a stable cycling performance can be still obtained for the a-MoO 2 /MoS 2 @NC electrode at 0 °C (Fig.…”

V4C3 MXene-derived Zn0.99V5O12·nH2O nanoribbons as advanced cathodes for ultra-long life aqueous zinc-ion batteries

“…[1][2][3][4][5][6] The utilization of organic electrolytes in LIBs results in environmental pollution and safety issues, therefore limiting their widespread use in grid energy storage. 7,8 The consideration of cost and safety has prompted researchers to develop green, low-cost, high-safety, and sustainable energy storage devices. Aqueous zinc-ion batteries (ZIBs) have been recognized as highly appealing alternatives for large-scale energy storage owing to the impressive capacities of nearly 820 mA h g −1 , the low redox potential of −0.76 V, and available supplies of Zn.…”