Porous Li3V2(PO4)3/C cathode with extremely high-rate capacity prepared by a sol–gel-combustion method for fast charging and discharging

Porous Li3V2(PO4)3/C (LVP/C) cathode materials have been synthesized via a sol–gel-combustion method. The porous LVP/C shows stable and extremely high rate capacity, owing to the special porous structure and the nano-sized particle. In the potential range of 3.0–4.3 V, discharge capacities of 122, 114, 108 and 88 mAh g−1 can be delivered at high rates of 10, 20, 40 and 60 C after 100 cycles, respectively. In the potential range of 3.0–4.8 V, the corresponding discharge capacities are 145, 129, 122, 114 and 103 mAh g−1 after 500 cycles at 10, 20, 40, 60 and 100 C, which is the highest level for LVP so far.

Porous Li3V2(PO4)3/C (LVP/C) cathode materials have been synthesized via a sol–gel-combustion method. When filled with liquid electrolyte, the pores are responsible to reduce the distance of ion diffusion and increase the contact area between electrode and electrolyte, resulting in improved electrochemical performance.Figure optionsDownload as PowerPoint slideHighlights
► Porous Li3V2(PO4)3/C composite was prepared via a sol–gel-combustion method.
► The porous Li3V2(PO4)3/C shows stable and extremely high rate capacity.
► The good performance is attributed to the porous structure and nano-sized particle.