简介:Porousnanocarbonswithaverageparticlesize20–40nmweredevelopedusingbiowasteoilpalmleavesasaprecursor.Simplepyrolysiswascarriedoutat700°Cundernitrogenatmosphere.Obtainedporousnanocarbonsshowedexcellentporousnaturealongwithsphericalshape.Symmetricsupercapacitorfabricatedfromporousnanocarbonsshowedsuperiorsupercapacitanceperformancewherehighspecificcapacitanceof368F/gat0.06A/gin5MKOHwerereported.Italsoexhibitedhighstability(96%over1700cycles)andenergydensityof13Wh/kg.Lowresistancevalueswereobtainedbyfittingtheimpedancespectra,thusindicatingtheavailabilityofthesematerialsassupercapacitorselectrode.Thepresentedmethodiscosteffectiveandalsoinlinewithwastetowealthapproach.
简介:ColdForcenturies,thebody’sbloodhasbeenmixedcloselywithemotions.Peoplewhoshownohumanemotionsorfeelings,forexample,aresaidtobecold-blooded.Cold-bloodedpeopleactincruelways.Theymaydobrutalthingstoothersandnotbyaccident,forexample,anewspapersaysthepolicearesearchingforacold-bloodedkiller.Thekillermurderedsome-onenotinselfdefenceorbecausehewasreactingtoangerorfear.Heseemedtokillfornoreason,andwithnoemotion,asiftakingsomeone’slifemeantnothing."Cold"canaffectotherpartsofthe