Highly Multifunctional Dopamine-Functionalized Reduced Graphene Oxide Supercapacitors

Abstract

Traditional battery and supercapacitor electrodes suffer from poor mechanical properties. Here, we harnessed non-covalent interactions between reduced graphene oxide (rGO) and branched aramid nanofibers to design strong supercapacitor electrodes. Dopamine functionalization and Ca 2+ ion addition led to tremendous improvements in mechanical performance while maintaining good energy-storage performance. The highest reported multifunctional efficiency parameter was realized for rGO-based electrodes. This work paves the way for highly multifunctional structural electrodes.

Fabrication of Graphene‐Based Self‐Assembly Monoliths through Reversible Fluorination and Defluorination Strategy

“…Finally, well‐organized and interlaced layer‐by‐layer stacking with nacre‐like interlock structure propels all FG nanosheets to come into being an entirety. [ 29 ] Therefore, FG monolith owns an excellent mechanical strength with high compression strength of 102 MPa, far exceeding that of PTFE sample (31 MPa), as shown in Figure 3e. The high compression strength guarantees applications of FG monolith in engineering field.…”

Molecule-assisted modulation of the high-valence Co3+ in 3D honeycomb-like CoxSy networks for high-performance solid-state asymmetric supercapacitors

“…where m is the mass loading of the active material (g), C is the specific capacity (mA h g −1 ) and specific capacitance (F g −1 ), and ΔV is the potential (V) window range for the positive electrode and negative electrode, respectively. The coulombic efficiency was calculated by the following equation: ) of the ASCs were calculated based on Equations (5) and (6), respectively:…”

“…The ever-increasing demand on compact and portable modern electronics has greatly stimulated the research on highly efficient energy storage devices [1][2][3]. Solid-state supercapacitors (SCs), as newly developed energy storage systems, have attracted considerable attention due to their fast charge/discharge capability, high power density, long life-span, excellent safety and light weight [4][5][6]. Yet, the low energy density seriously impeded their wide applications [7,8].…”

Antireflection Improvement and Junction Quality Optimization of Si/PEDOT:PSS Solar Cell with the Introduction of Dopamine@Graphene

“…Although the optical and electrical performance of graphene film is desired and useful for the performance enhancement of photovoltaic device, the CVD process and graphene film transferring were relatively complicated and uneconomical. Dopamine (DA) is a nontoxic organic material and can self-polymerize into highly adhesives poly(dopamine) (PDA), which hold π-π stacking interactions structures [29,30]. Besides, Hu et al [31] and Qin et al [32] demonstrated that the DA could benefit the dispersion of graphene and prevent the aggregation.…”