Electrochemical performances of Li3V2-(4/3)Ti (PO4)3/C as cathode material for Li-ion batteries synthesized by an ultrasound-assisted sol–gel method

Synthesis and characterization of PVDF‐coated cotton‐derived hard carbon for anode of Li‐ion batteries

“…The predecomposed cotton was added into the PVDF solution and was mixed by magnetic stirring for 6 hours. Then this mixture was put into the ultrasound equipment for 2 hours; from our previous experience, ultrasound helps PVDF to fold on the surface of specific materials uniformly . After these treatments, the obtained thick slurry was pyrolyzed at 1000°C for 6 hours in the tube furnace under the Ar flow.…”

“…Then this mixture was put into the ultrasound equipment for 2 hours; from our previous experience, ultrasound helps PVDF to fold on the surface of specific materials uniformly. 20 After these treatments, the obtained thick slurry was pyrolyzed at 1000°C for 6 hours in the tube furnace under the Ar flow. Three samples were marked as HC/P-1, HC/P-2, and HC/P-3, respectively.…”

Ultralong lifespan of SuperRedox Capacitor using Ti-doped Li3V2(PO4)3 cathode with suppressed vanadium dissolution

“…We chose Ti 4+ , Al 3+ , and Mn 2+ as the metal ions to be substituted. This choice is based on two main considerations: (i) stoichiometric substitutions with vanadium in LVP; 8,[31][32][33] (ii) the different valence and electronegativity values of these selected metals (V 3+ = 1.545, Ti 4+ = 1.730, Al 3+ = 1.513, and Mn 2+ = 1.343) 34 are expected to inuence the formation of V-O bonds within the material. In addition, this study includes a comprehensive examination of the capacity retention of the synthesized Li 3 V 2−X M X (PO 4 ) 3 materials with X ranging from 0.1 to 0.5.…”

Unraveling the Relationship between Ti4+ Doping and Li+ Mobility Enhancement in Ti4+ Doped Li3V2(PO4)3

“…Na + and Ti 4+ co-doping can also greatly enhance the properties of materials. Oh et al 25 synthesized Li 2.97 Na 0.03 V 1.97 Ti 0.03 (PO 4 ) 3 /C materials, which delivers a high first discharge specific capacity (170.6 mAh/g) and capacity retention (72.66% after 100 cycles) at 0.2 C. Li et al 38 synthesized single Ti 4+ doped LVP/C composites, which exhibited excellent rate performance when Ti 4+ doping ratio is in the range of 0.03−0.06. All of these studies confirmed that the doping of Ti 4+ effectively promotes the electrochemical properties of lithium vanadium phosphate.…”

“…The traditional design concept of doping is to control the initial raw materials ratio. It is widely believed that low-valence dopants (such as Na + , ) substitute lithium ions and high-valence dopants (such as Co 2+ , Mg 2+ , − Mn 2+ , Ni 2+ , , Fe 3+ , Al 3+ , , Ce 3+ , Cr 3+ , and Ti 4+ ,, ) are doped at the V sites of LVP. Ti 4+ and V 3+ have similar ionic radii, which makes Ti 4+ an ideal candidate for V 3+ substitution.…”