Encapsulating NiCo₂O₄ inside metal–organic framework sandwiched graphene oxide 2D composite nanosheets for high-performance lithium-ion batteries

Abstract

2D composite nanosheets comprised of NiCo2O4 encapsulated inside ZIF-67 sandwiched graphene oxide presented exceptional cycling stability and rate capability.

NiCo Metal–Organic Framework and Porous Carbon Interlayer-Based Supercapacitors Integrated with a Solar Cell for a Stand-Alone Power Supply System

“…Our results match well with a previous report on NiCo-MOF nanosheets, which too showed a type IV isotherm with a surface area of 380 m 2 g –1 , and the nanosheets were observed to be rich with mesopores (pore diameter ∼12 nm) . In another report on two-dimensional (2D) composite nanosheets of NiCo 2 O 4 @ZIF-67/GO, the BET surface area was found to be 175 m 2 g –1 . The mesoporosity of the NiCo-MOF structure here allows uniform penetration of the electrolyte, suggesting that an appreciable number of accessible sites are available for redox reactions.…”

“…32 In another report on two-dimensional (2D) composite nanosheets of NiCo 2 O 4 @ZIF-67/GO, the BET surface area was found to be 175 m 2 g −1 . 33 The mesoporosity of the NiCo-MOF structure here allows uniform penetration of the electrolyte, suggesting that an appreciable number of accessible sites are available for redox reactions. On the other hand, for the PC, the isotherm is mixed type in character with contributions from types I and IV as per IUPAC classification 34 (Figure S4b).…”

Value‐Added Formate Production from Selective Methanol Oxidation as Anodic Reaction to Enhance Electrochemical Hydrogen Cogeneration

“…For comparison, the XRD patterns of other powder samples with different Ni/Co ratios are shown in Figure S4 in the Supporting Information, which indicate that the Ni–Co hydroxides are grown successfully on the surface of NF. The characteristic peak of LDHs can be seen at a small angle (Figure S4 a, b in the Supporting Information) and means that Ni x Co 1− x (OH) 2 was synthesized . It is difficult to differentiate between the nickel and cobalt hydroxide phases because they have similar structures and their diffraction peaks are very close.…”

Recent progress in metal–organic framework/graphene-derived materials for energy storage and conversion: design, preparation, and application

“…More conveniently, metal oxides can also be achieved by direct calcination of the MOF/graphene precursors in air. 41,42,62,109,[141][142][143] For example, our group synthesized a 3DG/ Fe 2 O 3 aerogel with porous Fe 2 O 3 nanoframeworks wrapped within a graphene skeleton by employing a 3DG/PB aerogel as a template and thermal treatment at 250 C under air conditions. The hierarchical structure provided a highly interpenetrated porous conductive network as well as abundant stress buffer nanospace for effective charge transport and robust structural stability during electrochemical processes.…”