High capacity anode materials for Li-ion batteries based on spinel metal oxides AMn2O4 (A = Co, Ni, and Zn)

Abstract

Manganites of transition and/or post-transition metals, AMn 2 O 4 (where A was Co, Ni or Zn), were synthesized by a simple and easily scalable co-precipitation route and were evaluated as anode materials for Li-ion batteries. The obtained powders were characterized by SEM, TEM, and XRD techniques. Battery cycling showed that ZnMn 2 O 4 exhibited the best performance (discharge capacity, cycling, and rate capability) compared to the two other manganites and their corresponding simple oxides. Further studies on the effect of different sintering temperatures (from 400 to 1000 C) on particle size were performed, and it is found that the size of the particles had a significant effect on the performance of the batteries. The optimum particle size for ZnMn 2 O 4 is found to be 75-150 nm. In addition, the use of water-soluble and environmentally friendly binders, such as lithium and sodium salts of carboxymethlycellulose, greatly improved the performance of the batteries compared to the conventional binder, PVDF. Finally, ZnMn 2 O 4 powder sintered at 800 C (<150 nm) and the use of the in-house synthesized lithium salt of carboxymethlycellulose (LiCMC) binder gave the best battery performance: a capacity of 690 mA h g À1 (3450 mA h mL À1 ) at C/10, along with good rate capability and excellent capacity retention (88%).

Double‐Shelled CoMn2O4 Hollow Microcubes as High‐Capacity Anodes for Lithium‐Ion Batteries

“…There are two possible reasons for this discrepancy. Firstly, it may be attributed to the reversible formation/ dissolution of polymeric gel-like film resulted from electrolyte degradation, which has also been observed in nanostructured ZnMn 2 O 4 [27] and other transition metal oxides. [28] Secondly, it may also be contributed from the further oxidation of MnO to Mn 3 O 4 or even Mn 2 O 3 as observed in Kim's study on ZnMn 2 O 4 nanowires.…”

“…Previously, the electrochemical properties of sub-micrometer sized CoMn 2 O 4 particles have been reported, where a reversible capacity of about 515 mA h g −1 with retention of about 64% after 50 cycles at a current density of 69 mA g −1 is achieved. [27] To the best of our knowledge, this is the first report on utilizing CoMn 2 O 4 hollow structures as an anode material for LIBs. A much higher specific capacity with enhanced capacity retention is achieved in the present study through engineering the microstructure.…”

Defect-engineered mesoporous ternary nanoarchitecture of zinc-cobalt-oxide/nitrogen-doped graphene as anode material in lithium ion batteries

“…Owing to the presence of multiple valences of the cations, high electrical properties, and the synergetic effect of these characteristics, these new classes of transition-metal oxides are capable of providing desirable electrochemical behavior which is primarily useful for LIB applications. For the last several years, various MTMOs such as NiCo 2 [10][11][12][13][14][15][16][17][18].…”

In Situ Self-Developed Nanoscale MnO/MEG Composite Anode Material for Lithium-Ion Battery

“…3), as observed previously by other groups for nanostructured Mn-based oxides. 16,33,34 Figure 4 shows the charge/discharge profiles of MnO/MEG composite for cycles 1, 2, 200, 450 at 0.3 C (Fig. 4).…”