Dual-defect site regulation on MOF-derived P-Co₃O₄@NC@O_v-NiMnLDH carbon arrays for high-performance supercapacitors

Abstract

Introducing oxygen vacancies into hydrotalcite-like materials is considered to have positive facilitation on improving their electrochemical properties. However, there are still huge challenges to fully utilize the effect of exposed...

In situ construction of core–shell structured cobalt oxide@nickel–cobalt-layered double hydroxide nanorods with abundant oxygen vacancies towards boosting electrochemical energy storage

“…The EPR signal at g = 2.003 in NCLO exhibits enhanced intensity compared to NCL, which can be attributed to the presence of trapped electrons associated with oxygen vacancies. 26 The observed EPR signal intensities are consistent with the XPS results, indicating that NCLO has a higher number of oxygen vacancies than NCL. The formation mechanism of oxygen vacancies in this study is based on the charge regulation mechanism of the layer in LDH.…”

“…24 The diffraction peaks corresponding to the (003), ( 006) and ( 009 indicating a heightened disorder in the NCLO structure attributed to an increased presence of oxygen vacancies. [25][26][27] In addition, NCLO exhibits an IV-type isotherm and H3 hysteresis loops (Fig. 3c), indicating the presence of a substantial quantity of mesopores and a significantly elevated surface area.…”

In situ electrochemical metal (Co, Ni) oxide deposition on MoS2 nanosheets for highly efficient electrocatalytic water splitting

“…2a, the Co 2p spectrum shows obvious satellite peaks at 785.2 eV and 801.8 eV, and the peaks at 780.1 eV and 795.8 eV are attributed to Co 2p 3/2 and Co 2p 1/2 orbits, respectively, which can be ascribed to Co 2+ species. [31][32][33] The Ni 2p spectrum of NiO/MoS 2 /CC shown in Fig. 2b can be deconvoluted into four peaks, corresponding to Ni 2p 3/2 (855.4 eV) and Ni 2p 1/2 (873.1 eV) and satellite peaks (861.0 eV and 879.0 eV), respectively.…”

Revealing the Effect of the [CoO]6 Microstructure in Pseudocapacitance by Controlled Delithium of LiCoO2

“…For instance, heteroatom doping is regarded as an effective strategy to regulate the electronic structure of materials for optimal ion diffusion and leads to more active sites . Another common strategy is building hierarchical architecture, which is also beneficial to expand the active area and accelerate mass/charge transfer . Besides, designing heterojunction composite materials can not only synthesize the advantages of various materials and avoid the inherent shortcomings of the material itself but also produce synergistic effects between the components. , However, the optimization of cobalt oxide materials is far from being fully developed.…”