Effect of lithium to zirconium ratio on microstructure and electrochemical performances of LZO modified LiNi0.8Co0.1Mn0.1O2 cathode materials

Synergistic Strategy Using Doping and Polymeric Coating Enables High-Performance High-Nickel Layered Cathodes for Lithium-Ion Batteries

“…These include enhancing the ionic conductivity of the cathode material, fostering electron transfer, promoting lithium-ion diffusion dynamics, stabilizing the surface structure, and preventing direct contact between the cathode material and electrolyte. In the interim, inert compounds like oxides, − fluorides, phosphates, − as well as conductive materials, , such as carbon-based materials and lithium-containing compounds, are primarily used in coating strategies. The elemental doping of the bulk structure, in contrast, is modified at the atomic level.…”

Terephthalic Acid Surface-Functionalized Ni-Rich LiNi0.8Co0.1Mn0.1O2 Cathode with Enhanced Electrochemical Performances

“…Although peak strengths become weaker after coating in the first cycle, both samples appear to have similar three redox couples, which can be assigned to the phase transformation of the initial hexagonal to the monoclinic phase (H1 to M), the monoclinic to the second hexagonal phase (M to H2), and the second hexagonal to the third hexagonal phase (H2 to H3) during the charging/discharging process, indicating that TPA modification does not significantly influence the electrochemical behavior of the NCM811. 20 According to the viewpoints of Wu et al 20 and Lu et al, 21 the counter cathodic peak is located at 3.67 V, and the first anodic peak corresponds to the oxidation of Ni 2+ to Ni 3+ and/or Ni 4+ . Moreover, the 1TPA@NCM811 demonstrates a lower potential difference (ΔV) of 0.23 V than that of the bare NCM811 (0.38 V), indicating decreased electrochemical polarization and ion transport resistances.…”

Cationic Covalent Organic Framework Coating of the Ni-Rich Cathode Surface for the Significant Improvement of the Interfacial Li+ Transport and Structural Stability

“…Several compounds have been investigated for coating materials, which lead to notable improvements in electrochemical performances. Metal oxides, such as Al 2 O 3 , SiO 2 , ZrO, and TiO 2 , serve as physical barriers to obstruct the contact between the cathode and electrolyte. − Fluorides, such as LiF, AlF 3 , and PrF 3 , are incorporated to suppress the degradation of Li salts on the cathode surface. − Li-containing oxides, such as Li 2 ZrO 3 , LiTiO 4 , and Li 2 SiO 4 , provide a fast Li + transport channel through the coating layer. − Polymer materials with ionic/electronic conductivity polymers reduce the interfacial resistance. − …”