Synthesis of a Nickel-Rich LiNi_0.6Mn_0.2Co_0.2O₂ Cathode Material Utilizing the Supercritical Carbonation Process

Abstract

This study aims to develop a novel efficient process for the synthesis of a nickel-rich LiNi0.6Mn0.2Co0.2O2 cathode material for lithium-ion batteries utilizing supercritical CO2. In this work, the effect of operating parameters including the amount of chelating agent, coprecipitation temperature, and sintering temperature on the composition, structure, and electrochemical performance of Ni0.6Mn0.2Co0.2CO3 precursors and LiNi0.6Mn0.2Co0.2O2 cathode materials is investigated through systematic characterization and electrochemical testing. When using 1.5 M NH4OH at 60 °C for 8 h followed by sintering at 850 °C for 12 h in air, the LiNi0.6Mn0.2Co0.2O2 cathode material delivers an initial discharge capacity of 176.3 mAh g–1 at 60 mA g–1 with a capacity retention of 94.9% after 50 cycles. This work demonstrates the application of carbon capture and utilization for battery material synthesis with the advantages of no caustic precipitating agent, no impurity introduction, and good electrochemical performance compared with a conventional carbonate coprecipitation process.

Facile Synthesis of Ultrasmall SnO2/Sn Nanoparticles Grown on the N-Doped Carbon Framework as a Long-Life Anode Material

“…Over the past several years, Li-ion batteries (LIBs) have been popularly utilized in our cars, phones, and laptop computer as a result of their exceptional lifespan and advantageous energy density. − At present, graphite, as a major commercial anode, has hit its utmost and still cannot meet the expectation of market development for LIBs. − Hence, probing prospective anodes with superior capacity and energy density to replace graphite has become very imperative. SnO 2 -based negative materials have shown tremendous potential due to their higher capacity, environmental benignancy, and low price. − Nevertheless, the huge volume change in the lithium insertion and release process results in fast capacity diminution, which is still an enormous obstruction for their commercialization as an anode for LIBs. − …”

One Stone Three Birds: Na–Zr Co-Doping and Li6Zr2O7 Coating Enhance the Structural Stability and Electrochemical Performance of the LiNi0.8Co0.1Mn0.1O2 Cathode Material

“…Since Sony introduced the lithium-ion battery (LIB) to the public in the 1990s, LIB research has continued to progress . The core units of the battery contain cathode material, anode material, diaphragm, and electrolyte, where the proportion of cathode material is about 1/3. – It is the most critical material in LIBs.…”