标題：Electrolytic calcium hexaboride for high capacity anode of aqueous primary batteries作者：Yin, Huayi; Tang, Diyong; Mao, Xuhui; Xiao, Wei; Wang, Dihua

來源出版物：JOURNAL OF MATERIALS CHEMISTRY A 卷：3 期：29 頁：15184-15189 DOI：10.1039/c5ta03728j 出版年：2015

摘要：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.

入藏号：WOS:000358129400033

文獻類型：Article

語種：English

擴展關鍵詞：IRON BORIDE BATTERY; ELECTROCHEMICAL REDUCTION; 3-PHASE INTERLINES; METAL BORIDES; SILICON; FERROMAGNETISM; NANOWIRES; CHLORIDE; DIOXIDE; MODEL

通訊作者地址：Wang, Dihua; Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

電子郵件地址：gabrielxiao@whu.edu.cn; wangdh@whu.edu.cn

地址：

[Yin, Huayi; Tang, Diyong; Mao, Xuhui; Xiao, Wei; Wang, Dihua] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

[Yin, Huayi] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA.

研究方向：Chemistry; Energy & Fuels; Materials Science

ISSN：2050-7488

eISSN：2050-7496