High interfacial storage capability of porous NiMn₂O₄/C hierarchical tremella-like nanostructures as the lithium ion battery anode

Abstract

Porous hierarchical NiMn2O4/C tremella-like nanostructures are obtained through a simple solvothermal and calcination method. As the anode of lithium ion batteries (LIBs), porous NiMn2O4/C nanostructures exhibit a superior specific capacity and an excellent long-term cycling performance even at a high current density. The discharge capacity can stabilize at 2130 mA h g(-1) within 350 cycles at a current density of 1000 mA g(-1). After a long-term cycling of 1500 cycles, the capacity is still as high as 1773 mA h g(-1) at a high current density of 4000 mA g(-1), which is almost five times higher than the theoretical capacity of graphite. The porous NiMn2O4/C hierarchical nanostructure provides sufficient contact with the electrolyte and fast three-dimensional Li(+) diffusion channels, and dramatically improves the capacity of NiMn2O4/C via interfacial storage.

Carbon-Coated Honeycomb Ni-Mn-Co-O Inverse Opal: A High Capacity Ternary Transition Metal Oxide Anode for Li-ion Batteries

“…This strong peak corresponds to the reduction of Ni-Mn-Co-O to Ni°, Mn° and Co° and the formation of amorphous Li 2 O and the SEI layer. The potential range in which the initial reduction occurs for all Ni-Mn-Co-O samples is in close agreement with potential values reported for other mixed transition metal oxide compounds, such as MnCo 2 O 4 microspheres (~0.67 V)20, NiCo 2 O 4 nanosheets (~0.67 V)51 and NiMn 2 O 4 tremella like nanostructures (~0.60 V)52. The main reduction peak shifts to a higher potential of ~0.86 V in the second scan for the Ni-Mn-Co-O particles and ~0.75 V for all of the Ni-Mn-Co-O IO samples.…”

“…For all other Ni-Mn-Co-O IO samples the four anodic peaks were observed at ~1.06, 1.55, 1.90 and 2.16 V. The anodic peaks at ~1.55, 1.90 and 2.16 V are associated with the formation of MnO, NiO and CoO respectively, and these processes are not hindered by the carbon-coating (Fig. 3(d))2052. Thus, a single compositional Ni-Mn-Co-O ternary crystalline phase with IO structure re-oxidizes to three unary metal oxides from the corresponding reduced metals, in a single 3D open-worked honeycomb structure; Li reactions are electrochemically identified for each oxide from the first discharge.…”

Hydrogen production from water–gas shift reaction over Ni–Cu–CeO 2 oxide catalyst: The effect of preparation methods

“…3(B) and (E). In the case of NieCueCeO 2 ÀSG peaks appeared at 854.1 and 855.4 eV were attributed to the NiO and Ni 2 O 3 species, respectively [35,36]. However, the peak located at 856.8 eV was attributed to the Ni(OH) 2 present on the catalyst surface [37].…”

Facile synthesis of NiMn 2 O 4 nanosheet arrays grown on nickel foam as novel electrode materials for high-performance supercapacitors

“…Zhang's group [12] has successfully fabricated hierarchical MnCo 2 O 0.45 @δ-MnO 2 core-shell nanowires with the specific capacitance of 357.5 F g -1 at current density of 0.5 A g -1 . Particularly, among the Mn-based spinel structured oxides, nickel manganese mixed metal oxides have been well known for years [13][14][15]. The spinel structured NiMn 2 O 4 has some strengths of better conductivity, stability and relative higher capacitance compared with single Mn-based oxides [16].…”