Research Progress in Improving the Cycling Stability of High-Voltage LiNi0.5Mn1.5O4 Cathode in Lithium-Ion Battery

Abstract

High-voltage lithium-ion batteries (HVLIBs) are considered as promising devices of energy storage for electric vehicle, hybrid electric vehicle, and other high-power equipment. HVLIBs require their own platform voltages to be higher than 4.5 V on charge. Lithium nickel manganese spinel LiNi0.5Mn1.5O4 (LNMO) cathode is the most promising candidate among the 5 V cathode materials for HVLIBs due to its flat plateau at 4.7 V. However, the degradation of cyclic performance is very serious when LNMO cathode operates over 4.2 V. In this review, we summarize some methods for enhancing the cycling stability of LNMO cathodes in lithium-ion batteries, including doping, cathode surface coating, electrolyte modifying, and other methods. We also discuss the advantages and disadvantages of different methods.

LNMO‐Graphite Cells Performance Enhancement by the Use of Acid Scavenging Separators

“…Several strategies to improve the electrochemical performance of LNMO‐based cells were proposed over the years. Surface modification by coating agents and dopants enhance the interfacial stability of LNMO electrodes and protect their surface from a detrimental contact with electrolyte solution species during cell operation. While coatings and the doping of LNMO can increase the robustness of the cathode structure, other cells’ components remain unprotected from parasitic reactions with the electrolyte solution species.…”

Simple and Eco‐Friendly Fabrication of Electrode Materials and Their Performance in High‐Voltage Lithium‐Ion Batteries

“…The performance of the proposed full‐cell model was compared with that of other full cells reported in the literature, made from the same components but from more conventional sources. In this sense, the abundant number of articles reporting on the spinel LNMO in a half‐cell configuration‐four reviews citing an enormous number of articles‐contrasts with the small number of studies on a full‐cell configuration so far reported, which is to our knowledge fewer than ten. Table shows some properties related to the performance of these cells, including a column with the capacity ratio, N/P, a parameter that is not usually included in scientific publications although its importance is undeniable.…”

Recent progresses in the suppression method based on the growth mechanism of lithium dendrite

“…LSBs have been widely used in portable electronic devices (PEDs) in the past decades [3,4] . Recently, it is still the object of intense research with the aim at further improving electrochemical performance for the requirements of electric vehicles (EVs), hybrid electric vehicles (HEVs) and smart grids (SGs) [5][6][7][8][9][10] . However, these performance requirements with high energy and high power may accelerate the growth of lithium dendrite on the anode surface; it leads to safety concern and low coulombic efficiency [11][12][13] .…”