Boosting the cycling stability of Ni-rich layered oxide cathode by dry coating of ultrastable Li₃V₂(PO₄)₃ nanoparticles

Abstract

Dry coating of ultrastable Li3V2(PO4)3-carbon (LVP-C) nanoparticles on LiNi0.6Co0.2Mn0.2O2 (NCM622) leads to a robust composite cathode with improved rate capability and cycling life without sacrificing the specific energy density compared with pristine NCM622.

Enhanced Cycling and Structure Stability of an Electron Transfer-Accelerating Polymer Poly(3,4-ethylenedioxythiophene):Poly(styrenesulfonate)-Covered Mn-Based Layered Cathode with Ga3+ Doping for a Li-Ion Battery

“…It can be detected that compared to the fresh cathodes, the cycled samples including the pristine and 2 wt % PEDOT:PSS-coated cathodes both demonstrate movement to a lower angle of the (003) peak, indicating an increase in the c lattice parameter due to the electrostatic repulsion between the oxygen layers along the c direction in the Li-deficient state . By comparison, the pristine cathode delivers a shifted angle of the (003) peak from 18.66 to 18.28°, while the 2 wt % PEDOT:PSS-coated sample shows it from 18.72 to 18.5°; the smaller shifted angle of the (003) peak for the 2 wt % PEDOT:PSS-coated cathode suggests that less loss of active lithium is resulted . Additionally, the (006)/(102) and (018)/(110) splitting peaks of cycled LMNCO almost vanish away, implying that the cathode layered structure has received great changes.…”

“…57 By comparison, the pristine cathode delivers a shifted angle of the (003) peak from 18.66 to 18.28°, while the 2 wt % PEDOT:PSS-coated sample shows it from 18.72 to 18.5°; the smaller shifted angle of the (003) peak for the 2 wt % PEDOT:PSS-coated cathode suggests that less loss of active lithium is resulted. 58 Additionally, the (006)/(102) and (018)/(110) splitting peaks of cycled LMNCO almost vanish away, implying that the cathode layered structure has received great changes. On the contrary, the 2 wt % PEDOT:PSS-coated sample could still demonstrate the distinct splitting of the (006)/(102) and (018)/(110) peaks.…”

Ion-Exchanged Phosphomolybdic Acid Interfacial Modification Enhances the Electrochemical Performance of LiNi0.9Mn0.1O2

“…Tailoring the formation of single-crystal, , coating microstructures, − and doping high-valence elements involving Zr 4+ , Sn 4+ , Ta 5+ , − Nb 5+ , W 6+ , − and Mo 6+ − have been adopted to restrain Li/Ni mixing and the lattice parameter changes in the H2–H3 phase transition of the NM cathode, to improve the structural stability. In addition, the Keggin structure metal oxide cluster PMo 12 O 40 3– , with ionic conductivity and electronic transferability, has been studied in the LIB field.…”

Mitigation of Oxygen Evolution and Phase Transition of Li-Rich Mn-Based Layered Oxide Cathodes by Coating with Oxygen-Deficient Perovskite Compounds

“…In addition, researchers explored active coating layers such as olivine phase LiMPO 4 ((M = Fe, Mn, etc.) and Li 3 V 2 (PO 4 ) 3 to improve the electrochemical performance of Ni-rich cathodes without sacrificing the energy density of the entire cathode . However, such active coatings usually lack the capability to capture oxygen.…”