title: Pyro-synthesis of a high rate nano-Li3V2(PO4)3/C cathode with mixed morphology for advanced Li-ion batteries.
abstract: A monoclinic Li3V2(PO4)3/C (LVP/C) cathode for lithium battery applications was synthesized by a polyol-assisted pyro-synthesis. The polyol in the present synthesis acts not only as a solvent, reducing agent and a carbon source but also as a low-cost fuel that facilitates a combustion process combined with the release of ultrahigh exothermic energy useful for nucleation process. Subsequent annealing of the amorphous particles at 800°C for 5 h is sufficient to produce highly crystalline LVP/C nanoparticles. A combined analysis of X-ray diffraction (XRD) and neutron powder diffraction (NPD) patterns was used to determine the unit cell parameters of the prepared LVP/C. Electron microscopic studies revealed rod-type particles of length ranging from nanometer to micrometers dispersed among spherical particles with average particle-sizes in the range of 20-30 nm. When tested for Li-insertion properties in the potential windows of 3-4.3 and 3-4.8 V, the LVP/C cathode demonstrated initial discharge capacities of 131 and 196 mAh/g (~100% theoretical capacities) at 0.15 and 0.1 C current densities respectively with impressive capacity retentions for 50 cycles. Interestingly, the LVP/C cathode delivered average specific capacities of 125 and 90 mAh/g at current densities of 9.6 C and 15 C respectively within the lower potential window.
authors: 1] Department of Materials Science and Engineering, Chonnam National University, 300 Yongbong-dong, Bukgu, Gwangju 500-757, South Korea [2].
authors: Jungwon
authors: J
authors: Kang
authors: 1] Department of Materials Science and Engineering, Chonnam National University, 300 Yongbong-dong, Bukgu, Gwangju 500-757, South Korea [2].
authors: Vinod
authors: V
authors: Mathew
authors: Department of Materials Science and Engineering, Chonnam National University, 300 Yongbong-dong, Bukgu, Gwangju 500-757, South Korea.
authors: Jihyeon
authors: J
authors: Gim
authors: Department of Materials Science and Engineering, Chonnam National University, 300 Yongbong-dong, Bukgu, Gwangju 500-757, South Korea.
authors: Sungjin
authors: S
authors: Kim
authors: Department of Materials Science and Engineering, Chonnam National University, 300 Yongbong-dong, Bukgu, Gwangju 500-757, South Korea.
authors: Jinju
authors: J
authors: Song
authors: Department of Materials Science and Engineering, Chonnam National University, 300 Yongbong-dong, Bukgu, Gwangju 500-757, South Korea.
authors: Won Bin
authors: WB
authors: Im
authors: Department of Materials Science and Engineering, KAIST, 335 Gwahangno, Yuseung-gu, Daejon 305-701, South Korea.
authors: Junhee
authors: J
authors: Han
authors: 1] Department of Materials Science and Engineering, KAIST, 335 Gwahangno, Yuseung-gu, Daejon 305-701, South Korea [2] Center for Nanomaterials and chemical reactions, Institute for Basic Science, Daejon 305-701, South Korea.
authors: Jeong Yong
authors: JY
authors: Lee
authors: Department of Materials Science and Engineering, Chonnam National University, 300 Yongbong-dong, Bukgu, Gwangju 500-757, South Korea.
authors: Jaekook
authors: J
authors: Kim