Design of 3D Metal–Organic Material with Multiple Redox-Active Sites for High-Performance Lithium-Ion Batteries

Abstract

To meet the challenges of poor cycling performance and low specific capacity of organic electrode materials, an example of a three-dimensional manganese-based coordination polymer [Mn 2 (pztc)(H 2 O) 2 ] n (Mn-3D) was synthesized by a simple hydrothermal reaction using a redox-active organic moiety pyrazine-2,3,5,6-tetracarboxylic acid (H 4 pztc) as the linker. The Mn-3D anode material exhibited excellent lithium storage capacity to store 14 lithium ions, with a high theoretical specific capacity of 942 mA h g −1 based on density functional theory. Owing to the coordination bonds between the redox-active ligand and the metal center, Mn-3D delivered high electrolyte stability and electrical conductivity and thus the anode material could exhibit superior cycling performance with a superior reversible capacity of 692 mA h g −1 after 160 cycles at 100 mA g −1 . Experimental and theoretical analyses revealed the reversibility of the lithium storage active sites in Mn-3D during cycling. This work highlights the significance of the design of redox-active metal−organic materials as high-performance anodes of lithium-ion batteries.

One-Dimensional Croconate-Based Fe-CP as a High-Performance Anode Material for Lithium–Ion Batteries

“…The capacity and Coulombic efficiency from the 26th cycle onward tended to remain nearly constant, indicating the good stability and capacity retention of the Fe-CP anode after standing for 5 days. On the basis of the above results, it can be stated that the Fe-CP contains competitive high-performance anode materials in comparison to other typical anode materials in LIBs ( Table 1 ) [ 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 ]. These findings highlight the exceptional potential of 1D structure materials for lithium storage, offering enhanced performance and reliability for LIBs.…”

Mini-Review on Organic Electrode Materials: Recent Breakthroughs and Advancement in Metal Ion Batteries

“…Liu et al reported a Mn-based MOF encompassing pyrazine-2,3,5,6-tetracarboxylic acid (H4pztc) as the linker via a simple hydrothermal reaction. The organic linker allowed easily accessible sites for the reversible storage of 14 Li ions . Incorporating Mn successfully decreased the energy gap between the organic ligands, leading to improved electrical conductivity.…”