Operando leaching of pre-incorporated Al and mechanism in transition-metal hybrids on carbon substrates for enhanced charge storage

Electrostatic self-assembly of MXene and carbon nanotube@MnO2 multilevel hybrids for achieving fast charge storage kinetics in aqueous asymmetric supercapacitors

“…S9†), demonstrating the high structural and electrochemical stability of the TCM electrode. These impressive capacitive properties are highly comparable to those of many previous representative studies for MnO 2 -based electrodes (Table S1†), such as AK-MnO 2 , 16 reassembled δ-MnO 2 , 17 MnO 2 @CNTs@3DGA, 19 MnO 2 /pg-C 3 N 4 , 41 MnO 2 @Ppy, 42 β-MnO 2 /birnessite, 43 0.8 V-MnO 2 , 44 MnO 2 @WC, 45 MnO 2 -C, 46 MnO 2 @CNT, 47 Na 0.55 Mn 2 O 4 (ref. 48) and Na 0.25 MnO 2 (ref.…”

Visualizing Nucleation and Growth Process of Vanadium‐Supramolecular Nanoribbons Self‐Assembled by Rapid Cooling Method towards High‐Capacity Vanadium Nitride Anode Materials

“…It is widely accepted that high‐crystallinity materials generally suffer from difficulties in structural change of lattice planes, thus leading to hindered permeation and transport of electrolyte ions to some degree. In addition, the highly ordered structure would be dynamically unfavorable for the sufficient reaction of redox species, [ 45 ] leading to a low charge storage capacity, which is consistent with electrochemical performance.…”

“…In addition, low crystal degree structure will facilitate the ion transport, increases the exposed area of active sites, and improves charge storage activity. [ 45 ] Therefore, lower degree of crystallinity VN/C nanoribbons obtained by drying in the oven may exhibit higher performance than that prepared by freeze drying (Figure S22f, Supporting Information). In order to reveal the relationship between the morphology and performance, we further investigate their electrochemical performance.…”

Unlocking Layered Double Hydroxide as a High‐Performance Cathode Material for Aqueous Zinc‐Ion Batteries

“…[28,29] Clearly, at the normalized O K-edge, the pre-peaks of Ni 3 Mn 0.7 Fe 0.3 -LDH (529.2 and 533.2 eV) shift to lower energy position of H v -Ni 3 Mn 0.7 Fe 0.3 -LDH (528.5 eV and 533.0 eV), which can be attributed to the higher oxidation state of metal ions due to the formation of hydrogen defects in the local structure of H v -Ni 3 Mn 0.7 Fe 0.3 -LDH, and these results are consistent with XPS in Figure 1f-i. [30,31] In addition, the pre-edge peak intensity in H v -Ni 3 Mn 0.7 Fe 0.3 -LDH is increased with a large portion of the holes located in O 2p states that compensate for the removal of H ions. [29,32] Based on the analysis above, the formation of hydrogen vacancies caused higher valance of TM ions in the laminate of H v -Ni 3 Mn 0.7 Fe 0.3 -LDH and exposed terminal-O sites for Zn ion storage.…”