Rare earth nanostructures based on PrO_x/CNT composites as potential electrodes for an asymmetric pseudocapacitor cell  

作　　者：Anjali Paravannoor Chippy Alphons Augustine N.Ponpandian 

机构地区：[1] School of Chemical Sciences,Swami Anandatheertha Campus,Kannur University.Edat P 0,Kerala,India [2] Department of Nanoscience and Technology,Bharathiar University,Coimbatore,Tamil Nadu,India

出　　处：《Journal of Rare Earths》2020年第6期625-632,共8页稀土学报（英文版）

基　　金：by DST-INSPIRE Faculty Scheme,Govt.of India(DST/INSPIRE/04/2015/001803)。

摘　　要：Rare earth metal oxides have been widely used as pseudocapacitor electrodes owing to their unique physical and electronic properties.The present paper reports the synthesis and pseudocapacitor applications of praseodymium oxides,owing to their unique physical properties.PrOx/unzipped carbonnanotubes were synthesized following a hydrothermal approach.Detailed morphological as well as electrochemical analyses were performed to elucidate how the unique properties of PrOx affect the charge storage ability.Special emphasis was given on the effect of anion intercalation due to the surface oxygen vacancies in PrOx which would contribute towards the pseudocapacitive energy storage.Oxygen intercalation was exploited for the first time in fluorite crystals for fast energy storage and a specific capacitance value as high as 1099 F/g was obtained with the electrodes.An asymmetric supercapacitor prototype was also fabricated with a V2 O5/graphene counter electrode and the energy and power density values obtained are as high as 52.08 Wh/kg and 2.9 kW/kg,respectively.

关 键 词：PrO_x Carbon nanotubes SUPERCAPACITOR Anion intercalation Graphene Rare earths 

分 类 号：TM53[电气工程—电器] TB33[一般工业技术—材料科学与工程]