Gelatin-assisted synthesis of LiNi0.5Mn1.5O4 cathode material for 5V lithium rechargeable batteries

Hydrothermal synthesis of reduced graphene oxide-LiNi0.5Mn1.5O4 composites as 5 V cathode materials for Li-ion batteries

“…Both of the two impedance plots are composed of a semicircle in the high frequency range and a straight sloping line in the low frequency range. The semicircle in high frequency is corresponding to the charge transfer impedance (Rct), referred to the charge transfer of lithium ion on the surface of spinel oxide [22], while the straight line in the low frequency is linked with the Warburg impedance (Zw) caused by the solid-phase diffusion in the electrode materials [29]. It was observed that the diameter of the semicircle in high frequency of the rGO-LNMO sample is decreased significantly, reflecting that the Rct of the rGO-LNMO composite sample has been effectively decreased.…”

“…LNMO spinels were prepared by a gelatin-assisted synthetic method referred to our previous work [22]. Composites of LNMO and rGO were in-situ synthesized in the following procedure.…”

A Binary Cyclic Carbonates-Based Electrolyte Containing Propylene Carbonate and Trifluoropropylene Carbonate for 5V Lithium-Ion Batteries

“…As can be seen in this figure, the LiNi 0.5 Mn 1.5 O 4 electrode show two distinct plateaus in the high potential range of 4.6-4.8 V due to the reversible reactions of the Ni 2+ /Ni 3+ and Ni 3+ /Ni 4+ couples. Besides, a small plateau in the 4 V region is also observed associated with the Mn 3+ /Mn 4+ redox couple[33,34]. The first charge and discharge capacities of the LiNi 0.5 Mn 1.5 O 4 electrode in the electrolyte of 1 M LiPF 6 -TFPC/PC (1:2) are 168 and 137 mAh g À1 , respectively, corresponding to the first Coulombic efficiency of 81.6%.…”

LiNi0.5Mn1.5O4 synthesized through ammonia-mediated carbonate precipitation

“…LiNi 0.5 Mn 1.5 O 4 has been prepared with various methods. Some chemical methods have been reported to produce pure, homogeneous spinel crystals, such as solid-state reaction, sol-gel, co-precipitation, molten salt and combustion method [11]. Among the various synthesis methods, co-precipitation most effectively prepares pure LiNi 0.5 Mn 1.5 O 4 with high electrochemical performance [12].…”