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

Abstract

Free-standing 2D porous nanomaterials have attracted considerable interest as ideal candidates of 2D film electrodes for planar energy storage devices.N evertheless,t he construction of well-defined mesopore arrays parallel to the lateral surface,w hichf acilitate fast in-plane ionic diffusion, is achallenge.Now,auniversal interface self-assembly strategy is used for patterning 2D porous polymers,f or example, polypyrrole,p olyaniline,a nd polydopamine,w ith cylindrical mesopores on graphene nanosheets.T he resultant 2D sandwich-structured nanohybrids are employed as the interdigital microelectrodes for the assembly of planar micro-supercapacitors (MSCs), whichd eliver outstanding volumetric capacitance of 102 Fcm À3 and energy density of 2.3 mWh cm À3 , outperforming most reported MSCs.T he MSCs display remarkable flexibility and superior integration for boosting output voltage and capacitance.

Efficient Electrocatalytic Upgrading of Furan-Based Biomass: Key Roles of Two-Dimensional Mesoporous Heterostructure and Ternary Electrolyte

“…38 After mixing the aqueous solution of the micelles and that of free-standing GO nanosheets, mPD and PA, the hydrogen-bonding and electrostatic interactions among these precursors could drive the close packing of the cylindrical micelles on the surfaces of GO along with the adsorption of mPD and PA in the poly(ethylene oxide) (PEO) domains. [39][40][41] The subsequent polymerization of mPD coupled with the PA doping was confined in the PEO regions, leading to the formation of PA-doped PmPD (PA/PmPD) networks on the GO surfaces. After the removal of the copolymer template, 2D heterostructural nanosheets composed of two mesoporous polymeric PA/PmPD layers with cylindrical pores sandwiching the GO nanosheet are obtained.…”

Graphene-Based Two-Dimensional Mesoporous Materials: Synthesis and Electrochemical Energy Storage Applications

“…Mesoporous material (e.g., carbon and metal oxides) on the G sheets can be used as a spacer, which hampers restacking G sheets and provides additional capacitance [ 74 , 82 , 133 , 136 , 143 , 144 , 145 , 146 , 147 ]. Mesoporous carbon/G nanocomposite (mCG) synthesized by KIT-6 had a surface area of 1179 m 2 g −1 and bimodal pores of 3.1 and 3.7 nm [ 74 ].…”

“…Mesoporous metal oxides (e.g., WO 3 , Nb 2 O 5 , TiO 2 ) and G composite can be utilized as an electrode in SC, especially Li- or Na-ion HSCs [ 136 , 144 , 146 ]. The sandwich-structured mesoporous Nb 2 O 5 /G/mesoporous Nb 2 O 5 (G@mNb 2 O 5 ) was used as an anode material in Na-ion HSCs ( Figure 8 D) [ 136 ].…”

Miniaturized Energy Storage Devices Based on Two‐Dimensional Materials

“…Apart from the 2D materials discussed above,m any 2D conductingp olymers are also applicable for MSC electrode applications,i ncluding PANI, [36] PPy, [84] and polydopamine (PDA). [23] Generally speaking, 2D polymers have av ariety of merits for electrochemical applications,but face problems of limited electrical conductivity.A ne ffective strategy is to combine them with the materials that have high electrical conductivity.W u et al reported the fabrication of ah ybrid film of thiophene (TP) nanosheets and EG for MSCs( TP/EG MSCs). [21] Benefiting from highly pseudocapacitive TP and highly conductive EG, the TP/EG MSCs delivered an areal capacitance of 3.42 mF cm À2 and av olumetric capacitance of 326 Fcm À3 at 10 mV s À1 .A lso, an impressive rate capability up to 1000 Vs À1 was also achieved.…”

“…As shown in Figure 1, the configuration of microelectronic devices has developed from linear,p lanar shapes to 3D architectures. [10] At the same time, many materials, such as variouse lementary substances, [11,12] oxides, [13][14][15] sulfides, [16][17][18] hydroxides, [19,20] and organic compounds, [21][22][23] with forms ranging from 0D to 3D, [24][25][26] have been investigatedf or both MB and MSC electrode purposes. Amongt hese, 2D materials attract considerable attention due to their uniquee lectrochemical and mechanical properties when applied in energy storage.…”