Facile preparation and performance of hierarchical self-assembly MnCo2O4 nanoflakes as anode active material for lithium ion batteries

Facile Synthesis of Flower‐Like MnCo2O4@PANi‐rGO: A High‐Performance Anode Material for Lithium‐Ion Batteries

“…First, to synthesize the flower‐like MnCo 2 O 4 by the hydrothermal process, Co 2+ and Mn 2+ form a regular cubic structure through the unique action of PVP under hydrothermal conditions . As the reaction time increases, the internal atoms/ions migrate outwards, which tends to yield the thermodynamically stable state, and at the same time, a certain special structure and morphology are formed . In this study, under the above conditions, a unique flower‐like structure MnCo 2 O 4 is generated (Scheme a) with a stable stereoscopic structure.…”

“…[28] As the reaction time increases, the internal atoms/ions migrate outwards, which tends to yield the thermodynamically stable state, and at the same time, a certain special structure and morphology are formed. [29][30][31] In this study, under the above conditions, a unique flower-like structure MnCo 2 O 4 is generated (Scheme 1a) with a stable stereoscopic structure. Then, PANi is coated onto the surface of the flowerlike MnCo 2 O 4 according to our previous experimental method by in situ polymerization.…”

“…It is suggested that the transition between Co 3+ and Co 2+ does not easily proceed in the subsequent cycles and, thus, does not occur again . A reduction peak is seen at approximately 0.65 V, which is ascribed to the initial reduction of Mn 2+ , and is accompanied by the formation of amorphous Li 2 O, the reduction of cobalt oxide, and the concurrent formation of a solid electrolyte interface (SEI) film . The strong peak at 0.01 V corresponds to the lithium intercalation process of carbon materials and to the further reduction of some metal ions into manganese and cobalt .…”

“…[40,41] A reduction peak is seen at approximately 0.65 V, which is ascribed to the initial reduction of Mn 2 + , and is accompanied by the formation of amorphous Li 2 O, the reduction of cobalt oxide, and the concurrent formation of a solid electrolyte interface (SEI) film. [30,42,43] The strong peak at 0.01 V corresponds to the lithium intercalation process of carbon materials and to the further reduction of some metal ions into manganese and cobalt. [44][45][46] In the initial oxidation process, a series of burr peaks located between 1.0 and 2.0 V are related to the oxidation of metallic Mn and Co to Mn 2 + and Co 2 + .…”

Design and Synthesis of Mesoporous Honeycomb‐Like CoP/Co2P Hybrids as Anode with a High Cyclic Stability in Lithium‐Ion Batteries

“…In recent years, with the increasing emergence of electric vehicles, a large amount of research has been dedicated to anode materials with a large capacity such as Sn, Si, transition metal oxides, and metal sulfides . Besides these, P is expected to be another attractive anode because of its large gravimetric capacity (Li 3 P, 2595 mAh g −1 ), low cost, high earth abundance, and safe Li‐intercalation potential .…”