The Application of Indium Oxide@CPM-5-C-600 Composite Material Derived from MOF in Cathode Material of Lithium Sulfur Batteries

Abstract

Due to the “shuttle effect”, the cycle performance of lithium sulfur (Li-S) battery is poor and the capacity decays rapidly. Replacing lithium-ion battery is the maximum problem to be overcome. In order to solve this problem, we use a cage like microporous MOF(CPM-5) as a carbon source, which is carbonized at high temperature to get a micro-mesoporous carbon composite material. In addition, indium oxide particles formed during carbonization are deposited on CPM-5 structure, forming a simple core-shell structure CPM-5-C-600. When it is used as the cathode of Li-S battery, the small molecule sulfide can be confined in the micropores, while the existence of large pore size mesopores can provide a channel for the transmission of lithium ions, so as to improve the conductivity of the material and the rate performance of the battery. After 100 cycles, the specific capacity of the battery can be still maintained at 650 mA h·g−1 and the Coulombic efficiency is close to 100%. When the rate goes up to 2 C, the first discharge capacity not only can reach 1400 mA h·g−1, but also still provides 500 mA h·g−1 after 200 cycles, showing excellent rate performance.

Advanced Nanostructured Materials for Electrocatalysis in Lithium–Sulfur Batteries

“…Metal-organic frameworks (MOFs) are coordination polymers self-assembled by transition metal ions and organic ligands containing oxygen, nitrogen, and other elements [ 144 ]. As a new class of porous materials, MOFs have attracted much attention in the field of energy storage due to their tunable nanostructure and functionalization [ 145 , 146 ]. MOFs-based heterostructures are MOFs carbonized in an inert environment to generate MOFs-derived carbon-metal framework structures with high porosity.…”

Recent advances in metal organic frameworks and their composites for batteries

“…However, the cycling performance of the materials needed to be further improved. Through hydrothermal method and carbonized CPM-5, the core-shell structure CPM-5-C-600@S was synthesized by Han et al [134]. The micro-mesopores in the composite material can limit the small molecule sulfide and provide a channel for lithium ion transmission.…”

Three-Dimensional PdPbBi Nanoalloy-Embedded Reduced Graphene Oxide/CPM-5 Prismatic Composite as High-Efficiency Electrocatalysts for Ethylene Glycol Oxidation

“…Also, MOFs have the advantages of uniform shape and size, porous, diverse, and tunable surfaces . For instance, CPM-5 (crystalline porous materials) has been used as a sulfur fixative for Li–S batteries, zinc–air batteries, and as an H 2 separation membrane. − However, MOFs have poor electrical conductivity and low mass permeability . At present, most researchers choose carbon as the support material of the catalyst, such as carbon nanotubes, carbon nanofibers, carbon black, and so on. , Reduced graphene oxide (rGO) has the advantages of good stability, corrosion resistance, conductivity, and a large surface area, which can promote electron transmission, increase the contact area of reactants, and thus improve catalytic efficiency .…”

“…18−20 However, MOFs have poor electrical conductivity and low mass permeability. 21 At present, most researchers choose carbon as the support material of the catalyst, such as carbon nanotubes, carbon nanofibers, carbon black, and so on. 22,23 Reduced graphene oxide (rGO) has the advantages of good stability, corrosion resistance, conductivity, and a large surface area, which can promote electron transmission, increase the contact area of reactants, and thus improve catalytic efficiency.…”