Polyaniline-decorated porous carbons with engineered meso/macrochannels for high performance capacitive deionization

Abstract

Porous activated carbons (PACs) are widely used capacitive deionization (CDI) electrode materials because of their high specific surface area and low cost. However, the excessive co-ion expulsion and slow charge...

Heterointerface regulation of covalent organic framework-anchored graphene via a solvent-free strategy for high-performance supercapacitor and hybrid capacitive deionization electrodes

“…7c), BAHCGO-75 occupies the highest point, further confirming the excellent desalination ability and fastest desalination rate of BAHCGO-75. 61–64 In addition, even compared with previously reported carbon-based CDI (Table S1, ESI†), BAHCGO-75 still has a far superior SAC and mean salt adsorption rate (MSAR). This observation shows that the addition of graphene not only increases the utilization of active sites, but its inhibitory effect on the self-stacking of the COF layer also helps accelerate the diffusion rate of Na + and enhance the capacitive contribution to the total capacitance of BAHCGO-75, thereby triggering higher ion absorption rates.…”

MXene‐Based Capacitive Deionization–Strong Competitor Among Faradaic Electrode Systems: Current Status and Future Perspectives

“…For example, in situ grown PANI (20 wt %) on porous activated carbon (PAC/20PANI) resulted in high SAC of 52.2 mg g −1 in 2000 mg L −1 NaCl at 1.2 V due to the synergistic contributions of EDL and pseudocapacitance. However, SAC/charge efficiency significantly reduced to 13 mg g −1 /37 % after 100 cycles, which is ascribed to the electrode passivation [185] . Besides, the polymer or organic molecule incorporated MXene resulted in superior SACs/ASARs ranges of 31.5–92 mg g −1 /0.4–4.7 mg g −1 min −1 (Table 1, 2).…”

“…However, SAC/charge efficiency significantly reduced to 13 mg g À 1 /37 % after 100 cycles, which is ascribed to the electrode passivation. [185] Besides, the polymer or organic molecule incorporated MXene resulted in superior SACs/ASARs ranges of 31.5-92 mg g À 1 /0.4-4.7 mg g À 1 min À 1 (Table 1, 2). A remarkably high SAC achieved by MCNF@PPy + DBS À / /MCNF@PPy + Cl À MCDI cell [183] is superior to the PPy-DBS/CNT// PPy-Cl/CNT HCDI cell [186] and other polymer or organic molecule containing Faradaic electrodes (Table 1, S2).…”

Uranium and lithium extraction from seawater: challenges and opportunities for a sustainable energy future

“…Electrodialysis is an electrochemical separation technology capable of recovering valuable metal ions from aqueous sources such as seawater and brackish water. 238,239 In an electrodialysis cell, multiple pairs of anionic exchange membranes and cationic exchange membranes are placed alternately between one pair of cathode and anode, thereby forming multiple concentrating and desalting chambers. Under the impetus of an electric eld, cations and anions in the feed water are conveyed through oppositely charged ionexchange membranes (IEMs) but rejected by the same charged IEMs, resulting in accumulation and depletion of ions in the concentrated and dilute chambers, respectively.…”