The heterogeneous structure facilitates the rapid transport of lithium ions in novel single-crystal CoMn-MOF derivatives.

Transition metal sulphides and oxides have been identified as potential cathode materials for lithium-ion batteries with high initial capacity and high selectivity. Nevertheless, the low ground conductivity and volume expansion have constituted significant obstacles to the advancement of this field of study. In this study, the heterostructure CoMn₂O₄/MnS₂@C1-2-2 of MnS₂ and CoMn₂O₄ was obtained through high-temperature (Ar. 450 °C) calcination of a novel red single crystal [CoMn(TDC)] n precursor. The resulting structure exhibited excellent lithium-ion transport properties. The biphasic heterostructure with a porous carbon framework is capable of forming a multitude of phase interfaces and conductive pathways, which facilitate charge migration, enhance conductivity, and expand the contact area with the electrolyte, thereby augmenting the charge transfer capability. The CoMn 2 O 4 MnS 2 @C1-2-2 composite displays remarkable lithium storage capabilities, with a specific capacity of 689 mA h g−1 even after 400 cycles at 0.5 A g−1. The heterostructure CoMn₂O₄MnS₂@C1-2-2, comprising a transition metal sulfide (MnS₂) and oxide (CoMn₂O₄), has been constructed by employing a novel type of MOF monocrystal {CoMn(TDC)}n as a precursor. The incorporation of surfactants and the heterogeneous structure of the modifiers with metal-ligand ratios has been demonstrated to enhance the transport performance of lithium ions as anodes for lithium-ion batteries. [Display omitted] • Rhombic red novel bimetallic CoMn-MOF single crystals was synthesized by hydrothermal method. • Derivatives of CoMn-MOF single crystals were used as anode materials with excellent performance for LIBs. • Heterogeneous interface between MnS 2 and CoMn 2 O 4 were constructed to boost rapid lithium ions transport. [ABSTRACT FROM AUTHOR]