PEDOT Nanowires Connecting Exfoliated HNb₃O₈ Nanosheets as High-Rate Anode for Lithium-Ion Capacitor

Incorporation of HNb3O8 Nanosheets into PEDOT Aerogel with Enhanced Performance for Lithium-Ion Capacitor

“…Moreover, as the proportion of E-HNb 3 O 8 increases, the E-HNb 3 O 8 on the surface of PEDOT sheets can still maintain the uniform lamellar morphology in high-magnification SEM images (Figure S3b–d), which are similar to that of E-HNb 3 O 8 (Figure S3a). Since E-HNb 3 O 8 nanosheets have a Zeta potential of −39.3 mV and PEDOT:PSS exhibits a positive Zeta potential after H 2 SO 4 treatment, , the structurally stable PDT-Nb composite aerogels can be obtained by strong electrostatic interactions between negatively charged E-HNb 3 O 8 and positively charged PEDOT:PSS. Figure e show the TEM images and the corresponding elemental images.…”

“…The incorporation of E-HNb 3 O 8 into the PEDOT aerogel was prepared by a hydrothermal synthesis following a method reported previously . Specifically, the E-HNb 3 O 8 nanosheets were obtained by chemical exfoliation of the KNb 3 O 8 precursor . The E-HNb 3 O 8 suspension of various amounts was added into the suspension of PEDDT:PSS (Clevios, PH1000) containing 0.1 M H 2 SO 4 , followed by 30 min ultrasonication to promote uniform dispersion of E-HNb 3 O 8 nanosheets.…”

“…In contrast, the HNb 3 O 8 is a layered material composed of alternating layers of protons and NbO 6 octahedra connected by edge and corner-sharing. It can be easily obtained by exfoliating KNb 3 O 8 and the subsequent proton-exchange process . Moreover, the HNb 3 O 8 has a large theoretical capacity of 394 mAh g –1 , making HNb 3 O 8 have great potential for Li + storage.…”

“…Moreover, the HNb 3 O 8 has a large theoretical capacity of 394 mAh g –1 , making HNb 3 O 8 have great potential for Li + storage. Our recent studies have shown that exfoliated HNb 3 O 8 nanosheets (E-HNb 3 O 8 ) connected by poly(3,4-ethylene dioxythiophene) (PEDOT) nanowires exhibit excellent electrochemical properties when used as anodes for LICs . The roles of PEDOT nanowires in the E-HNb 3 O 8 –PEDOT electrode include increasing the electrode conductivity, suppressing E-HNb 3 O 8 from restacking, and creating 3D interconnected electron pathways.…”

Interfacial polymerization of PEDOT sheath on V2O5 nanowires for stable aqueous zinc ion storage

“…The galvanostatic intermittent titration technique (GITT) was performed on the Land test system at 0.1 A g −1 and 15 minutes intervals. The Zn 2+ diffusion coefficient ( D Zn 2+ ) was achieved from GITT measurement using the following equation: 53,54 where τ is the duration time of the current pulse, n m is the amount of active material (mol), V M is the unit molar volume of the electrode material (cm 3 mol −1 ), S is the contact area of the electrode and electrolyte, Δ E s is associated with the change of the steady-state voltage of the corresponding step, and Δ E t is the variation of the cell voltage.…”