Heterostructured O_v‐Mn₂O₃@Cu₂SnS₃@SnS Composite as Battery‐Type Cathode Material for Extrinsic Self‐Charging Hybrid Supercapacitors

Abstract

In this work, self‐charging pouch‐type hybrid supercapacitor (HSCs) is fabricated by extrinsic integration of wind and solar energy power systems. Initially, the synthesized mesoporous 3D‐rhombohedral Mn2O3 shows a specific capacity of 37.61 mA h g−1 in KOH plus redox additives electrolyte. Further, the oxygen vacancy of Mn2O3 is tuned by fast‐reduction (FR) and mild‐reduction (MR) techniques. The rich oxygen vacancy of FR‐Mn2O3 (rich Ov‐Mn2O3) exhibits a specific capacity of 66.64 mA h g−1. On the other hand, the different morphologies of Cu2SnS3@SnS are synthesized by time‐dependent solvothermal technique. The 3D‐microsphere Cu2SnS3@SnS shows higher electrochemical performance than the others. In order to further improve the electrochemical performance, the heterostructure of rich Ov‐Mn2O3@Cu2SnS3@SnS composite is prepared that provides a maximum specific capacity of 126.07 mA h g−1 at 8 mA cm−2 and rate capability of 66.09% with retention of 93.89% after 10 000 cycles. This is ascribing to high electrical/ionic conductivity, larger faradaic reactions, lower interfacial resistance, and synergistic effect. Then, the fabricated pouch‐type HSC delivers a maximum specific energy density of 47.97 Wh kg−1 and power density of 5120 W kg−1. Finally, the pouch HSCs are employed for practical self‐charging applications.

Sputtering Deposition of a Binder-Free V2O5/ZnO Thin Film for Transparent Supercapacitor Applications

“…The areal capacitance values ( C ac , F/cm 2 ) of the TSSC device were assessed using the following eq . , The areal energy density (Wh/cm 2 ) and areal power density (W/cm 2 ) values of the TSSC device were calculated using eqs and where C ac is the areal capacitance (F/cm 2 ), Δ V is the cell voltage (V), Δ t is the discharge time (s), E d is the energy density (Wh/cm 2 ), and P d is the power density (W/cm 2 ).…”

Fabrication Technologies of Flexible Transparent Electrodes for Supercapacitors: Recent Advances and Perspectives

“…[ 236a ] Photo‐driven self‐charging supercapacitors can be an integrated system consisting of independent energy harvesting and storage modules. [ 237 ] Such supercapacitors typically incorporate both solar cells and supercapacitors, where the solar cells serve as the energy collectors that convert solar energy into electrical energy, and the supercapacitors function as energy storage devices. [ 204b ] To date, the commonly used materials in self‐charging FTSCs mainly including siloxene NSs, [ 236a ] metallic oxides (e.g., ZnO, [ 191 ] WO 3 , and MoO 3 ), conductive polymers (e.g., PEDOT:PSS [ 191 ] ) and carbon NMs (e.g., single‐layer graphene [ 234b ] ).…”

Built-In Piezoelectric Nanogenerators Promote Sustainable and Flexible Supercapacitors: A Review

“…Meanwhile, flexible and wearable energy-harvesting devices have gained significant attention in industrial and academic communities as they can be integrated with textiles or hand-held portable electronic devices [31]. In recent years, there has been a continuous increase in research on flexible wearable energy devices, focusing mainly on stretchability, flexibility, and mechanical strength [32][33][34][35][36]. As a result, energy storage devices are expected to be compatible with flexible devices so that they can meet the power requirement in applications such as health detection, and electronic skins are also drawing considerable attention [37,38].…”