Electrochemical behavior of Li/LiV3O8 secondary cells

Hyo Rim Bak, Jae Ha Lee, Bok Ki Kim, Wooyoung Yoon

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8 Citations (Scopus)

Abstract

Li/LiV3O8 secondary cells with Li-foil and Li-powder anodes were fabricated, and their electrical properties were compared. Using the powder anode, a cell with an initial discharge capacity of 260 mAh g-1 that could be operated for over 100 cycles was obtained. The porous Li-powder electrode was safely synthesized by pressing an emulsion droplet onto an SUS mesh. A threefold increase in the electrical conductivity of the LiV3O8 cathode was achieved by the addition of carbon using a vibration pot mill. Using the powder anode resulted in 80% capacity retention at the 100th cycle, while that using the foil electrode was 46%; the 1. 0 Crate/ 0. 1 C-rate capacity ratio also increased from 44% to 60%. A cell employing the LiV3O8-carbon composite cathode showed better electrical performance, a capacity retention of 90% after 50 cycles, and an increase in rate capacity ratio. The crystal structure and morphology of the LiV3O8-C composite were investigated by x-ray diffraction and scanning electron microscopy.

Original languageEnglish
Pages (from-to)195-199
Number of pages5
JournalElectronic Materials Letters
Volume9
Issue number2
DOIs
Publication statusPublished - 2013 Mar 1

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Keywords

  • carbon composite
  • Li metal powder
  • lithium ion battery
  • lithium trivanadate

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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