Cation-Disordered Li₃VO₄: Reversible Li Insertion/Deinsertion Mechanism for Quasi Li-Rich Layered Li_1+x[V_1/2Li_1/2]O₂ (x = 0–1)

Abstract

Li-Rich Layered Li1+x[V1/2Li1/2]O2 (x = 0-1). (2018) Chemistry of Materials, 30 (15). 4926-4934.

Prolonged Cycle Life for Li₄Ti₅O₁₂//[Li₃V₂(PO₄)₃/Multiwalled Carbon Nanotubes] Full Cell Configuration via Electrochemical Preconditioning

“…Here, to determine the valence state of vanadium species (V n+ ), whether V 5+ or its reduced states, is difficult, because of its minute amount (few µg as later shown in Table 1), and the possible redox of V 4+ / V 5+ occurs in the potential region close to the LTO reaction (1.55 V vs. Li/Li + ) such as Li 3 VO 4 . 30 Deposition/accumulation of transition metals such as Mn on the negative electrode in LIBs have been already studied, [31][32][33] and it is well known that the existence of such transition metal/metal ions on the surface of negative electrodes induces the irreversible decomposition of electrolytes. Thus, it can be expected that the accumulated V 5+ on the LTO surface catalytically reduces the electrolyte components, leading to the lower coulombic efficiency of LTO side and the subsequent SOC shifts of the uc-LVP/ MWCNT.…”

Deep Insight into Electrochemical Kinetics of Cowpea‐Like Li3VO4@C Nanowires as High‐Rate Anode Materials for Lithium‐Ion Batteries

“…Moreover, of both samples show a slight local minimum at 0.5∼1.0 V (discharge process) and 1.0∼1.75 V (charge process), which is related to the voltage plateau (inset in Figure a). This phenomenon is likely due to the formation of a new phase in this voltage region . The two‐phase transition domain may increase the interaction between Li + ions and host material, leading to lower diffusion rate, which is similar to other insertion‐type electrode materials .…”

“…This phenomenon is likely due to the formation of a new phase in this voltage region. [13,20] The two-phase transition domain may increase the interaction between Li + ions and host material, leading to lower diffusion rate, which is similar to other insertion-type electrode materials. [21] The lithium diffusion in LVO@C NW is clearly faster than that of pristine LVO over the major intercalation/deintercalation processes.…”

Recent Advances in Supercapacitors: Ultrafast Materials Make Innovations

“…3a and b). 16 This cation disordering switches the reaction mechanism from a slow "two-phase" (plateau) to a fast "solidsolution" (slope) process in a limited potential window (2.5 V down to 0.76 V vs. Li) corresponding to one Li + insertion (Fig. 3c).…”

“…3a and b). 15,16 First, we have synthesized nanoparticles of LVO (size below 50 nm), highly-dispersed and entangled within the multi-walled CNT (MWCNT, 40 wt.%), via ultracentrifugation. 15 The capacity of the uc-treated composite reached 330 mAh g ¹1 when cycled in the potential range from 2.5 V down to 0.1 V vs. Li.…”