Enhancing the high-rate performance of Li3V2(PO4)3/C for Li-ion batteries via a synergistic effect of dual carbon sources

Validating the Electronic Structure of Vanadium Phosphate Cathode Materials

“…NASICON-type Na 3 V 2 (PO 4 ) 3 (NVP) and anti-NASICON Li 3 V 2 (PO 4 ) 3 (LVP) are promising cathode materials for both sodium- and lithium-ion battery applications, respectively. , Each material possesses a distinct crystal and electronic structure that allows for high stability, energy storage capacity, and fast ionic conduction through an interconnected framework of edge- and corner-shared PO 4 tetrahedra and VO 6 octahedra ( D Li, LVP = ∼10 –9 to ∼10 –10 cm 2 s –1 and D Na,NVP = ∼10 –11 cm 2 s –1 ). ,− Recent studies aimed specifically at high-rate Li-ion storage have focused on the practical use of monoclinic LVP, which shows a high-voltage operating cutoff at 4.8 V vs Li +/0 (compared to the standard 4.3 V for LVP (two-electron transfer)). ,, In the study by Ni et al, this 4.8 V cutoff enabled LVP to achieve a higher rate capability, reversible three Li + intercalation at up to 100C (1C = 133 mAh g –1 , theoretical capacity for a two-electron transfer in LVP) with specific capacity maintained at 119 mAh g –1 . These outcomes rival commercial LiFePO 4 performance …”

“…10,12−14 Recent studies aimed specifically at high-rate Li-ion storage have focused on the practical use of monoclinic LVP, which shows a high-voltage operating cutoff at 4.8 V vs Li +/0 (compared to the standard 4.3 V for LVP (two-electron transfer)). 13,15,16 In the study by Ni et al,this 4.8 V cutoff enabled LVP to achieve a higher rate capability, reversible three Li + intercalation at up to 100C (1C = 133 mAh g −1 , theoretical capacity for a two-electron transfer in LVP) with specific capacity maintained at 119 mAh g −1 . These outcomes rival commercial LiFePO 4 performance.…”

Manipulating Li3V2(PO4)3 cathode grains and conductivity with halloysite nanotubes and carbon layer toward durable lithium ion batteries

“…[6,7] Under the PO 4 anion framework, V 5+/4+ exhibited the highest voltage of 4.6 V vs. Li/Li + , and the theoretical specific capacity of monoclinic Li 3 V 2 (PO 4 ) 3 (LVP) is as high as 197 mAh g À1 at 3.0-4.8 V. [8,9] However, in the LVP crystal structure, VO 6 is separated by PO 4 , which results in low electronic conductivity of LVP. [10,11] Aiming at the deficiencies of LVP materials, its solutions mainly focus on improving the electronic conductivity and ion diffusivity, such as surface coating of electronic conductors, [12][13][14] ion doping modification, [15,16] and preparation of special nanostructures. [17,18] In recent years, carbon nanotubes have attracted more and more attention in the field of batteries due to their unique hollow tubular structure, excellent charge transport properties, and chemical and mechanical stability.…”