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

Abstract

Nanoscale MnO mildly expanded graphite (MnO/MEG) composites were synthesized by a facile hydrothermal method combined with a subsequent self-reduction process using MEG as the raw material. The physicochemical and electrochemical properties of this novel MnO/MEG composite were characterized by X-ray diffraction, scanning electron microscopy, galvanostatic charge/discharge tests, cyclic voltammetry, and electrochemical impedance spectroscopy measurements. MnO/MEG exhibits excellent electrochemical performance for which the reversible capacity is as high as 931 mAh g −1 at 0.3 C after 450 cycles, which can be attributed to nanoscale MnO on MEG and self-developed graphene during the charge/discharge process.

Chemical vapor deposition-assisted fabrication of a graphene-wrapped MnO/carbon nanofibers membrane as a high-rate and long-life anode for lithium ion batteries

“…In the anodic scan, the strong peak around about 1.3 V could be ascribed to the oxidation of Mn 0 to Mn 2+ (Mn + Li 2 O / MnO + 2Li + + 2e À ). 41,42 Additionally, aer the rst cycle, the redox peak intensities become stable, which indicate the highly reversible electrochemical reactions in the MnO/CNFs@G electrode and lead to the enhanced electrochemical processes. 43,44 Fig.…”

A 3D multifunctional host anode from commercial carbon cloth for lithium metal batteries

“…75-1621), 34 respectively. The gradual shift of the 2 θ -degree to a low value and the decrease in intensity of the (002) peak indicate the decreased crystallinity (due to the partial damage of the graphitic structure) 35 progressively from CC to NCC and to KNCC. In Raman analysis (Fig.…”

Preparation of Porous MnO@C Core-Shell Nanowires as Anodes for Lithium-Ion Batteries

“…As shown in Figure 6, in the first negative scan, the peak around 0.60 V should be ascribed to irreversible decomposition of the electrolyte and the formation of solid electrolyte interface (SEI) film, which disappeared in the following cycles. The reduction peak between 0.12 and 0.51 V and the oxidation peak at 1.28 V could be expressed as the following equation [16,17]: Since the second cycle, the CV curves tended to overlap, indicating a stable and reversible electrochemical behavior of MnO@C anode. Figure 7 showed the voltage profile of MnO@C for the first three cycles between 0.01 and 3.00 V at a current rate of 200 mA g −1 .…”