Coordination Polymer Framework Based On‐Chip Micro‐Supercapacitors with AC Line‐Filtering Performance

Abstract

On-chip micro-supercapacitors (MSCs) are important Si-compatible power-source backups for miniaturized electronics.D espite their tremendous advantages,c urrent onchip MSCs require harsh processing conditions and typically perform like resistors when filtering ripples from alternating current (AC). Herein, we demonstrated af acile layer-by-layer method towardso n-chip MSCs based on an azulene-bridged coordination polymer framework (PiCBA). Owing to the good carrier mobility (5 10 À3 cm 2 V À1 s À1 )ofPiCBA, the permanent dipole moment of azulene skeleton, and ultralow band gap of PiCBA, the fabricated MSCs delivered high specific capacitances of up to 34.1 Fcm À3 at 50 mV s À1 and ahigh volumetric power density of 1323 Wcm À3 .M ost importantly,s uch MCSs exhibited AC line-filtering performance (À738 8 at 120 Hz) with ashort resistance-capacitance constant of circa 0.83 ms.On-chip electrochemical energy storage devices, [1] such as micro-supercapacitors (MSCs) and microbatteries,h ave attracted tremendous attention in the past few years because of the rapid development of mobile electronics,w ireless sensors,a nd medical implants.C ompared with micro-batteries,on-chip MSCs have many advantages owing to their rapid energy-harvesting features,b urst-mode power delivery,a nd, in particular,c ompatibility with the Si industry. [1b, 2] Recent studies have focused on the thin-film fabrication of MSCs by using nanostructured functional materials such as graphene, [1d,3] graphene-based nanocomposites, [4] monolithic carbide-derived carbon, [1a] mesoporous conducting polymers, [5] and several other pseudocapacitive materials. [6] However, most devices based on these materials require harsh processing operation steps such as the high-temperature fabrication of electrode films,m etal electrode deposition, electrode gap generation by oxygen plasma, and the wet chemistry etching method. Such procedures lead to the easy cracking and delamination of active films from substrates,s uch as with Si wafers and Kapton films. [1b] Therefore,the development of Sicompatible MSCs with easy and cheap fabrication procedures is essential to enable their practical applications.Alternating current (AC) line-filtering,w hich can filter the AC ripple on the line-powered devices,isone of the most important tasks in the field of renewable electronic power systems such as power generation by using wind and tidal power. [7] However,t raditional aluminum electrolytic capacitors (AECs), which are widely used for this purpose,h ave al ow energy density and large volume size.T herefore, supercapacitors,p articularly MSCs,t hat possess an AC linefiltering ability,h igh energy density,a nd minimal size,a re ideal alternatives to AECs.T raditionally,p orous carbonbased supercapacitors exhibit poor AC line-filtering performance (resistance-capacitance [RC] time constant % 1s) compared with AECs (RC time constants = 8.3 ms) [7c] because of the slow and internal response of the polarization [7c] and limited signal propagation [7a] from the electrodes...

Competitive Metal Coordination of Hexaaminotriphenylene on Cu(111) by Intrinsic Copper Versus Extrinsic Nickel Adatoms

“…The targeted binding motif is a planar fourfold coordination complex, and incorporation of Cu, Ni, and Co coordination centers yielded isostructural π–d conjugated CONASHs with honeycomb structure and widely tunable properties . Superior electrical conductivities of up to 10 3 S cm −1 were demonstrated, thereby facilitating a variety of applications as electrode materials for organic field‐effect transistors, chemiresistive sensing, electrocatalytic hydrogen‐evolution reactions, as well as oxygen reduction and supercapacitors ,…”

Miniaturized Energy Storage Devices Based on Two‐Dimensional Materials

“…An azulene‐bridged coordination polymer framework (PiCBA), as reported by Yang and co‐workers, provided a good example for MSCs based on this type of material . Because of the rich aromatic skeleton, ultralow band gap, high carrier mobility (5×10 −3 cm 2 V −1 s −1 ), and permanent dipole moment of the azulene unit, PiCBA is a promising candidate for energy storage.…”

“…g) Impedance phase angle versus frequency for the PiCBA‐based MSCs. Reproduced with permission . Copyright 2017, Wiley.…”

Makroskopische kristalline 2D‐Polymere

“…[21][22][23][24] Die Zusammensetzung und die Strukturen von 2D-Materialien variieren stark -d iverse Stoffe und Stoffklassen organischer,o rganometallischer und anorganischer Natur kçnnen Schichtstrukturen bilden. Beispiele sind Graphen und Graphenoxid, [1,10,23,25] Übergangsmetalldichalkogenide, [7,12,[26][27][28][29][30][31] Metalloxide und -hydroxide, [32] Metallcarbide und -nitride, [33] hexagonales Bornitrid, [34] zweidimensionale kovalente organische Gerüstverbindungen (2D-COFs) [35][36][37][38][39][40][41][42][43][44] und Metall-organische Gerüstverbindungen (2D-MOFs), [45,46,55,[47][48][49][50][51][52][53][54] Silicen, [2,56] Phosphoren, [3,4,57] Germanen, [5,6,…”