文章基本信息

标题：Manganese oxide synthesized from spent Zn-C battery for supercapacitor electrode application
本地全文：下载
作者：Rifat Farzana ; Kamrul Hassan ; Veena Sahajwalla 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2019
卷号：9
期号：1
页码：1-12
DOI：10.1038/s41598-019-44778-z
出版社：Springer Nature
摘要：Manganese oxide (Mn 3 O 4 ) nanomaterials have promising potential to be used as supercapacitor electrode materials due to its high energy storage performance and environmental compatibility. Besides, every year huge volume of waste batteries including Zn-C battery ends up in landfill, which aggravates the burden of waste disposal in landfill and creates environmental and health threat. Thus, transformation of waste battery back into energy application, is of great significance for sustainable strategies. Compared with complex chemical routes which mostly apply toxic acids to recover materials from Zn-C battery, this study establishes the recovery of Mn 3 O 4 particles via thermal route within 900 °C under controlled atmosphere. Synthesized Mn 3 O 4 were confirmed by XRD, EDS, FTIR, XPS and Raman analysis and FESEM micrographs confirmed the coexistence of spherical and cubic Mn 3 O 4 particles. Mn 3 O 4 electrode derived from waste Zn-C battery demonstrate compatible electrochemical performance with standard materials and conventional synthesis techniques. Mn 3 O 4 electrode exhibited highest capacitance value of 125 Fg -1 at 5 mVs -1 scan rate. The stability of the electrode showed good retention in discharge and charge capacity by about 80% after 2100 cycles. This study demonstrates that waste Zn-C battery can be further utilized for energy storage application, providing sustainable and economic benefits.