High rate and stable capacity performance of 2D LiMn1.5Ni0.5O4 nanoplates cathode with ultra-long cycle stability

Recent Progress of High Voltage Spinel LiMn1.5Ni0.5O4 Cathode Material for Lithium-Ion Battery: Surface Modification, Doping, Electrolyte, and Oxygen Deficiency

“…In the past few decades, there has been immense research and progress in developing sustainable energy, with increasing demands for eco-friendly energy storage systems (ESSs). Among these energy storage methods, electrochemical energy storage devices have come to the fore due to their convenience and energy storage performance. , Currently, lithium-ion batteries (LIBs) are widely used in a variety of applications, including electric devices, electric vehicles (EVs), and grid energy storage systems. − …”

“…In addition, Mn dissolution during electrochemical cycling and the formation of impurity (NiO, Li x Ni 1– x O) phases are also one of the main problems. These disadvantages lead to the continuous growth of CEI, oxygen deficiencies in high temperature, and structure instabilities, which increase the polarization and expedite capacity decay. , When it comes to full cell, optimization of cell design including choice of electrolyte and anode material needs to be considered.…”

“…These disadvantages lead to the continuous growth of CEI, oxygen deficiencies in high temperature, and structure instabilities, which increase the polarization and expedite capacity decay. 5 , 27 When it comes to full cell, optimization of cell design including choice of electrolyte and anode material needs to be considered.…”

Failure Mechanisms of High-Voltage Spinel LiNi0.5Mn1.5O4 with Different Morphologies: Effect of Self-Regulation by Lithium Benzimidazole Salt Additive

“…However, owing to the synthesis and annealing conditions of LNMO, the degree of cation ordering changes the morphology, surface planes, and contact with the electrolyte. The main reason is the presence of Mn 3+ in the bulk, which causes two voltage plateaus at higher contents, forming disordered LNMO ( Fd m space group). , Many studies have investigated the effects of the ordered (P4 3 32 space group) and disordered LNMOs on battery performance, , phase, planes, crystallites, particle size, − and synthesis conditions . These studies concluded that the presence of Mn 3+ in LNMOs has three advantages; capacity compensation when the Ni ion valence changes during cycling, enhanced electrical conductivity, and excellent lithium-ion diffusivity below 4.0 V. , However, the Jahn–Teller distortion effect leads to a significant decay in battery performance during high-temperature operation, which is caused by the over-reduction of Mn 3+ to Mn 2+ and further dissolution in the electrolyte.…”

High‐Pressure Induction and Quantitative Regulation of Oxygen Vacancy Defects in Lithium Titanate

“…[ 3–5 ] In addition, the high 1.55 V (vs Li/Li + ) voltage platform avoids the growth of lithium dendrites and the decomposition of most electrolytes, although this will reduce the energy density. [ 6,7 ] Indeed, the decrease in energy density from a high‐voltage platform in a full cell can be resolved by matching cathode materials with high potentials, such as LiMn 1.5 Ni 0.5 O 4 (4.7 V vs Li/Li + ) [ 8 ] and Li 0.5 CoO 2 (4.2 V vs Li/Li + ). [ 9 ] However, the inherent low electronic conductivity and poor Li ion diffusion kinetics of LTO make the electrochemical performance poor at high rates, which makes LTO unable to fully satisfy the demands of energy batteries.…”