Formation of CoS₂ Nanobubble Hollow Prisms for Highly Reversible Lithium Storage

Abstract

Metal-organic frameworks (MOFs) have been intensively used as the templates/precursors to synthesize complex hollow structures for various energy-related applications. Herein we report a facile two-step diffusion-controlled strategy to generate novel MOFs derived hierarchical hollow prisms composed of Nanosized CoS bubble-like subunits. Uniform zeolitic imidazolate framework-67 (ZIF-67) hollow prisms assembled by interconnected nanopolyhedra are first synthesized via a transformation process. Afterwards, these ZIF-67 building blocks are converted into CoS bubble-like hollow particles to form the complex hollow prisms through a sulfidation reaction with an additional annealing treatment. When evaluated as an electrode material for lithium-ion batteries, the as-obtained CoS nanobubble hollow prisms show remarkable electrochemical performance with good rate capability and long cycle life.

Formation of graphene-encapsulated CoS2hybrid composites with hierarchical structures for high-performance lithium-ion batteries

“…The irreversible capacity loss of 300 mA h g À1 in the rst cycle could be attributed to SEI formation. 46 Aer the rst cycle, the well overlapping voltage proles demonstrate the superior electrochemical reversibility. For the bulk CoS 2 electrode, the specic capacities are signicantly lower than those of the CoS 2 /G composite and also exhibit serious capacity fading (Fig.…”

Complex Nanostructures from Materials based on Metal–Organic Frameworks for Electrochemical Energy Storage and Conversion

“…[117,118] For instance, hollow structured metal oxides have been prepared by controllable decomposition of MOF precursors at high temperature in air. [44,66,[128][129][130][131] For example, ion exchange reactions of MOF-based precursors with ions in solution can easily occur if the coordinating interaction between metal ions and organic ligands is relatively weak in the MOF matrix, leading to the formation of metal-based inorganic compounds. Similarly, solid-liquid phase reaction of MOF-based templates with various reactants in solution can produce nanomaterials with tunable structures and compositions as well.…”

“…[57][58][59] In addition, nanostructured functional materials derived from MOFs have been playing important roles in energy-related applications. [63][64][65][66][67][68] In addition to using simple MOF nanoparticles as precursors, delicate design and integration of MOFs and functional nanomaterials into novel multicompositional MOF-based nanocomposites could be used to construct complex nanostructured materials with designable structures and compositions. Depending on the conversion method, MOF precursors could be transformed into carbon, metal-based compounds and their composites with diverse porous or hollow nanostructures.…”

Metal–Organic Framework-Assisted Synthesis of Compact Fe2O3 Nanotubes in Co3O4 Host with Enhanced Lithium Storage Properties

“…Recently, several iron oxide@cobalt oxide hybrid materials have been reported with enhanced lithium storage capability, such as Fe 2 O 3 @Co 3 O 4 @C composite nanoparticles [22], Fe 2 O 3 @Co 3 O 4 nanowire arrays [23], and Co 3 O 4 @Fe 2 O 3 core–shell nanoneedle arrays [24]. In addition, the construction of hierarchical hollow nanostructures was found to be an effective way to accommodate the large volume changes associated with electrochemical reactions [25, 26]. The permeable shells can reduce Li + ion diffusion length and guarantee sufficient electrode–electrolyte contact area.…”