Jump to main content
Jump to site search

Issue 29, 2015
Previous Article Next Article

Electrolytic calcium hexaboride for high capacity anode of aqueous primary batteries

Author affiliations

Abstract

The use of lightweight elements/compounds and the employment of multi-electron reaction (MER) chemistry are two approaches used to develope high energy density materials for batteries. In this work, nanoscaled calcium hexaboride (CaB6) was prepared in one-step by the electro-reduction of solid calcium borate (CaB2O4) in molten CaCl2–NaCl. CaB2O4 was synthesized by a simple co-precipitation method. It was revealed that the electrolytic CaB6 delivers a specific capacity of 2400 mA h g−1 in 30% KOH solution though a multi-electron reaction mechanism. Its practical gravimetric energy is three times that of Zn. Decrease of particle size substantially improves both the electrochemical activity and discharge capacity of CaB6. The electrolysis of CaB2O4 in molten salt provides a straightforward and sustainable way to prepare high-capacity CaB6 using low-cost and environmentally friendly boron and calcium resources, which can be recycled from the used CaB6 primary batteries.

Graphical abstract: Electrolytic calcium hexaboride for high capacity anode of aqueous primary batteries

Back to tab navigation

Supplementary files

Publication details

The article was received on 22 May 2015, accepted on 11 Jun 2015 and first published on 01 Jul 2015


Article type: Paper
DOI: 10.1039/C5TA03728J
Citation: J. Mater. Chem. A, 2015,3, 15184-15189
  •   Request permissions

    Electrolytic calcium hexaboride for high capacity anode of aqueous primary batteries

    H. Yin, D. Tang, X. Mao, W. Xiao and D. Wang, J. Mater. Chem. A, 2015, 3, 15184
    DOI: 10.1039/C5TA03728J

Search articles by author

Spotlight

Advertisements