Thermal stability as well as electrochemical performance of Li-rich and Ni-rich cathode materials—a comparative study

Lithium-Rich Li1.17Ni0.17Co0.17Mn0.5O2 Cathode Material for Lithium-Ion Cells: Effect of Calcination Temperature on Electrochemical Performance

“…The CE of the three NCMO cathodes during the rate capability test is presented in Figure S2b, and it shows nearly 100% CE for all the NCMO samples. The enhanced rate performance of NCMO-950 can be attributed to an improved crystal structure and tiny particles with a large specific surface area, which can speed up the lithium-ion diffusion between the cathode particles and electrolytes. , As the calcination temperature is increased to 1000 °C, the rate capability decreases, which is probably because larger particles are produced at a higher temperature. Larger particles may result in longer lithium diffusion paths during charging and discharging.…”

Surface Modification on Nickel Rich Cathode Materials for Lithium‐Ion Cells: A Mini Review

“…[10][11][12][13][14] Due to the high technological maturity, LiCoO 2 (LCO), Li-[Ni x Co y Al 1À xÀ y ]O 2 (NCA) and LiFePO 4 (LFP) have been regarded as the materials of choice at the positive electrode side of lithium-ion cells. [15][16][17][18] However, the discharge capacity of LCO and NCA-based cathodes must be restricted to ensure structural stability. As the best alternative for these cathode materials, LiNi x Co y Mn z O 2 (abbreviated as NCM, where x + y + z = 1) received significant attention owing to the superior specific capacity, better energy density and high reversibility (Figure 1).…”

“…Ni-rich NCM materials, where x > y and z and both di-and trivalent nickel are present, have attracted a lot of interest recently due to their superior specific capacity and energy density along with their low Co content, which is a comparatively scarce metal. [20][21][22][23] In NCMs, a higher Ni content favours a higher capacity compared to one electron Co 3 + /4 + redox couple and the electrochemically inactive Mn 4 + ions since nickel offers a two-electron Ni 2 + /4 + redox process (Figure 2). [24] Therefore, increasing the Ni content, which offers a greater degree of lithium utilization and enhances energy density, is a commonly employed strategy to get the most out of the energy content of the NCM cathode.…”

Opportunities and Challenges of Layered Lithium-Rich Manganese-Based Cathode Materials for High Energy Density Lithium-Ion Batteries

“…Nowadays, the emergence of new lithium-ion power batteries has solved the shortage of traditional energy to a certain extent. Lithium-rich manganese oxides (LRMOs) are promising cathode materials for lithium-ion batteries due to their high energy density, , low cost, , and excellent thermal stability. , In 1991, Thackeray found that when the layered Li 2 MnO 3 was treated with a certain concentration of acid at 25 °C and then lithiated, the first lithium-rich material in history, Li 0.9 Mn 0.91 O 2 , was obtained. In 1997, a new layered solid solution (Li­(Li x /3 Mn 2 x /3 Co 1– x )­O 2 (0 ≤ x ≤ 1)) was discovered, which could be used as a cathode material for lithium batteries because of the excellent properties of Li 2 MnO 3 .…”