Ionic liquid-wrapped MXene film with bowl-like structures for highly integrated micro-supercapacitor array with ultrahigh output voltage

Waste to wealth: atomically dispersed cobalt–nitrogen–carbon from spent LiCoO2

“…Here, the tested Co-NC950 sample showed an I D /I G ratio of 1.18, lower than the 1.27 value for Zn-NC950 (Fig. S5A, ESI †), implying a lower occurrence of defects, 23 which was possibly due to the presence of heavier atomic metallic species in Zn-NC950 (4.16 versus 3.37 of Co-NC950). The specific surface areas (SSAs) of Co-NC950 and Zn-NC950 were similar, being 811 and 833 m 2 g À1 , respectively, as measured using the N 2 adsorption/desorption technique (Fig.…”

MXene-Based Micro-Supercapacitors: Ink Rheology, Microelectrode Design and Integrated System

“…30 Moreover, for microelectronic device integration systems with higher voltage requirements, high voltages can be obtained by connecting more MXene MSCs in series. 46,59,202 An example is the 60 V operating voltage achieved by screen-printing 100 connecting MXene MSCs (Figure 14d). 57 And Zhu et al fabricated an MSC array consisting of 30 MSC units connected in series on a polyimide tape, which can achieve a high output voltage of 90 V, as illustrated in Figure 14e.…”

“…57 And Zhu et al fabricated an MSC array consisting of 30 MSC units connected in series on a polyimide tape, which can achieve a high output voltage of 90 V, as illustrated in Figure 14e. 59 In the integration of high-density MXene MSCs, the homogeneity of the device proved to be critical to the stability of the output voltage, highlighting the advantages of solution-based printing methods in building integrated functional systems.…”

Free-standing multi-hierarchical MoC-based catalyst for pH-universal hydrogen evolution reaction at ultra-high current density

“…13,14 Therefore, achieving practical catalytic performance and long-term stability under industrial conditions remains a significant challenge. 15,16…”