Flexible all-solid-state micro-supercapacitor based on Ni fiber electrode coated with MnO2 and reduced graphene oxide via electrochemical deposition

Abstract

. Moreover, the resulting micro-supercapacitor device also demonstrated good flexibility and high cyclic stability. The present work provides a simple, facile and low-cost method for the fabrication of flexible, lightweight and wearable energy conversion/storage micro-devices with a high-performance.

General Interfacial Self‐Assembly Engineering for Patterning Two‐Dimensional Polymers with Cylindrical Mesopores on Graphene

“…The Ragone plot in relation to the volumetric energy density and power density of mPPy/rGO‐MSCs is shown in Figure f. Remarkably, mPPy/rGO‐MSCs exhibit high volumetric energy density of 2.3 mWh cm −3 , which compares well to that of lithium thin film battery (10 mWh cm −3 ), and much higher than those of some commercial energy storage devices (Figure f) . Also, this value (2.3 mWh cm −3 ) surpasses those of many recently reported planar MSCs, including onion‐like carbon (1.1 mWh cm −3 ), Ni@rGO@MnO 2 (0.6 mWh cm −3 ), PANI nanowires (0.78 mWh cm −3 ), and PANi/rGO (1.51 mWh cm −3 ), and so on. Meanwhile, mPPy/rGO‐MSCs display large energy density of 1.1 mWh cm −3 at a high power density of 503 mW cm −3 .…”

“…As a proof‐of‐concept, the 2D nanohybrids composed of mesoporous PPy coated on rGO (mPPy/rGO) are employed as microelectrodes of all‐solid‐state flexible planar micro‐supercapacitors (MSCs). Remarkably, the resultant MSCs deliver superior areal capacitance of 81 mF cm −2 and volumetric capacitance of 102 F cm −3 at 1 mV s −1 , large energy density of 2.3 mWh cm −3 , which outperform those of many recently reported planar MSCs, such as onion‐like carbon, Ni@rGO@MnO 2 , PANI nanowires, and rGO/PANI . Moreover, the MSCs show excellent mechanical flexibility without observable capacitance decrease under varied bending angles, and exceptional serial/parallel integration.…”

General Interfacial Self‐Assembly Engineering for Patterning Two‐Dimensional Polymers with Cylindrical Mesopores on Graphene

“…Equivalent series resistance (ESR), including electrolyte and electronic resistances,can be derived from high frequency region on the real axis. [57,58] Also,t his value (2.3 mWh cm À3 ) surpasses those of many recently reported planar MSCs, including onion-like carbon (1.1 mWhcm À3 ), [38] Ni@r-GO@MnO 2 (0.6 mWhcm À3 ), [39] PA NI nanowires (0.78 mWh cm À3 ), [40] and PA Ni/rGO (1.51 mWhcm À3 ), [41] and so on. [54] TheR agone plot in relation to the volumetric energy density and power density of mPPy/rGO-MSCs is shown in Figure 3f.R emarkably,m PPy/rGO-MSCs exhibit high volumetric energy density of 2.3 mWhcm À3 ,which compares well to that of lithium thin film battery (10 mWhcm À3 ), [55,56] and much higher than those of some commercial energy storage devices (Figure 3f).…”

Miniaturized Energy Storage Devices Based on Two‐Dimensional Materials

“…[61] In this section, we introducer ecent progress in material and architectural designs based on 2D building blocks in MBs and MSCs with linear configurations, including 2D cathode and anode materials. [206] [a] rGO = reduced graphene oxide, CNT = carbon nanotube, SWNT = single-walled carbon nanotube, CMC = carboxymethyl cellulose, GNW = graphene nanowall, BNG = nitrogen and boron co-doped graphene, NW = nanowire, rG-SP = water-dispersible graphene/sulfonated polyaniline, GCP = graphene/CNT/cross-linked PH1000 film, PG = phosphorene-graphene, GQD = graphene quantum dot, MGF = microfluidic-direct- www.chemsuschem.org…”