Electrolytic calcium hexaboride for high capacity anode of aqueous primary batteries

Content Provider	Semantic Scholar
Author	Yin, Huayi Tang, Diyong Mao, Xuhui Xiao, Wei Wang, Dihua
Copyright Year	2015
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.
Starting Page	15184
Ending Page	15189
Page Count	6
File Format	PDF HTM / HTML
DOI	10.1039/C5TA03728J
Alternate Webpage(s)	http://www.rsc.org/suppdata/c5/ta/c5ta03728j/c5ta03728j1.pdf
Alternate Webpage(s)	https://doi.org/10.1039/C5TA03728J
Volume Number	3
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article