Preparation and discharge performance of porous VB2 anodes for high capacity VB2-air battery

Zhi Guo Wei, Xin Lu, Jian Bo Tong, Yu Pan, Guo Qing Wang, Xuan Hui Qu

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

VB2 has great potential as an anode material of air batteries due to its high theoretical specific capacity (4060 mAh/g). In present work, the porous anodes for high capacity VB2-air battery were prepared by using powder metallurgy technology, with VB2 as the active materials of anodes, Ni as the conductive agents, and NH4HCO3 as the space-holder. The effect of porosity on the discharge performances of porous anodes was investigated. The results show that the porous anodes exhibit a good discharge performance with specific capacity up to 3216-3463 mAh/g. The discharge capacity, specific capacity, coulombic efficiency, and specific energy all significantly depend on the porosity of the porous anodes. When the addition of space-holder NH4HCO3 is 15wt%, the porous anodes have the porosity of 60.91%, and possess the superior discharge properties with discharge capacity of 7792 mAh, specific capacity of 3463 mAh/g, coulombic efficiency of 85.30%, and specific energy of 2370 mWh/g.

Original languageEnglish
Pages (from-to)122-126
Number of pages5
JournalWuji Cailiao Xuebao/Journal of Inorganic Materials
Volume32
Issue number2
DOIs
Publication statusPublished - 2017 Feb 1
Externally publishedYes

Keywords

  • Anodes
  • Powder metallurgy
  • Specific capacity
  • VB-air battery

ASJC Scopus subject areas

  • Materials Science(all)
  • Inorganic Chemistry

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