From food waste to high-capacity hard carbon for rechargeable sodium-ion batteries  

作　　者：Madina Kalibek Lunara Rakhymbay Zhanar Zhakiyeva Zhumabay Bakenov Seung-Taek Myung Aishuak Konarov 

机构地区：[1]Department of Chemical and Materials Engineering,School of Engineering and Digital Sciences,Nazarbayev University,53 Kabanbay Batyr Ave.,Astana,Kazakhstan [2]Hybrid Materials Research Center,Department of Nanotechnology and Advanced Materials Engineering,Sejong Battery Institute,Sejong University,Seoul 05006,South Korea

出　　处：《Carbon Resources Conversion》2024年第3期66-73,共8页碳资源转化（英文）

基　　金：funded by the Ministry of Education and Science of the Republic of Kazakhstan Grant(AP09259165);by Nazarbayev University under Collaborative Research Program Grant No.20122022P1611,AK.

摘　　要：In this study,we introduce a straightforward and effective approach to produce P-doped hard carbon using coffee grounds as the precursor,with H_(3)PO_(4)serving as the doping agent.By varying the concentrations of H_(3)PO_(4)(1 M,2 M,and 3 M),we aimed to determine the optimal doping level for maximizing the incorporation of phosphorus ions into the carbon framework.Our investigation revealed that using 2 M of H_(3)PO_(4)as the dopant material for hard carbon led to promising electrochemical performance when employed as an anode material for sodium-ion batteries.The P-doped hard carbon,carbonized at 1300℃,exhibited an impressive reversible capacity of 341 mAh g^(-1) at a current density of 20 mA g^(-1),with an initial Coulombic efficiency(ICE)of 83%.This outstanding electrochemical performance of P-doped hard carbon can be attributed to its unique properties,including a porous agglomerated structure,a significant interlayer spacing,and the formation of C-P bonds.

关 键 词：Coffee waste Hard carbon Phosphorus doping Sodium-ion batteries 

分 类 号：TM912[电气工程—电力电子与电力传动]