Facile construction of a flexible and wearable electrode based on the hierarchical structure of RGO-coated cotton fabric with amorphous Co–Ni–B alloy

Abstract

Schematic diagram of preparation process of amorphous Co–Ni–B/RGO/cotton fabric flexible electrode.

Robust and Promising Electrocatalytic Oxygen Evolution Reaction by Activated Cu–Co–B Amorphous Nanosheets

“…Two peaks are observed in the B 1s spectra at binding energies of 188.24 and 192.13 eV, which confirm the presence of an increased elemental boron state as well as a reduced oxidized boron state, respectively (Figure h). Thus, formal XPS analyses reveal that Cu–Co–B is partially oxidized at the surface; , however, in situ surface cleaning of the same sample using Ar + sputtering shows that the elemental nature of these elementals is still intact below the surface forming an alloy of Cu–Co–B. We believe the oxidized metal sites (Co 2+ /Co 3+ and/or Cu 2+ ) will work as the active sites (*) for the adsorption of *OH, *O, and *OOH species for the OER.…”

“…Two peaks are observed in the B 1s spectra at binding energies of 188.24 and 192.13 eV, which confirm the presence of an increased elemental boron state as well as a reduced oxidized boron state, respectively (Figure 3h). Thus, formal XPS analyses reveal that Cu−Co−B is partially oxidized at the surface; 42,46 S3 and S4). Notably, in all cases (including the literature reports), a peak from the NF substrate is seen in the range 1.3−1.4 V (vs RHE) masking the lower current density portion.…”

All‐Solid‐State Flexible Symmetric Supercapacitor Based on Morphology Oriented Amorphous Cu−Co−B Alloy Nanosheets for Energy Storage

“…Redox tuning in crystalline and electronic structure of bimetal–organic frameworks derived cobalt/nickel boride/sulphide system offered faradaic capacitance (1281 F g −1 at 1 A g −1 ), high rate performance (802.9 F g −1 at 20 A g −1 ), and 92.1 % cycling stability after 10000 cycles [12] . Recently, a flexible and wearable electrode based on the hierarchical structure of RGO‐coated cotton fabric with amorphous Co−Ni−B alloy was reported with an optimum specific capacitance of 313.9 F g −1 at 5 mV s −1 , and 85 % stability after 3000 cycles [13] . However, the applications of the amorphous transition metal borides (TMB) are not only confined to charge storage, but also extended to lithium storage, and electrocatalytic water splitting reactions [14]…”

“…[12] Recently, a flexible and wearable electrode based on the hierarchical structure of RGO-coated cotton fabric with amorphous CoÀ NiÀ B alloy was reported with an optimum specific capacitance of 313.9 F g À 1 at 5 mV s À 1 , and 85 % stability after 3000 cycles. [13] However, the applications of the amorphous transition metal borides (TMB) are not only confined to charge storage, but also extended to lithium storage, and electrocatalytic water splitting reactions. [14] Notably only a few reports are seen on the study of TMB on SC application as stated above where efforts are still required for extremely high-performance supercapacitor material and devices.…”

An experimental study on the electrical and thermal performance of reduced graphene oxide coated cotton fabric

“…With a scan rate of 5 mV.s -1 , specific capacitance of 313.9 F.g -1 was observed for the Co-Ni-B/rGO/fabric material. 37 In another study, it was aimed to prepare a flexible fabric electrode from a GO and rGO coated cotton fabric, which was subsequently subjected to chemical polymerization of polypyrrole (PPy). The elevated conductivity, with a sheet resistance of 7.5 and 308.3 Ω.sq −1 was obtained for rGO and GO coated samples respectively.…”