高等学校化学学报2021，Vol.42Issue(2)：633-642,10.DOI:10.7503/cjcu20200711
新型石墨化氮化碳/锡/氮掺杂碳复合物的制备及储钠性能
Preparation of a Novel g-C3N4/Sn/N-doped Carbon Composite for Sodium Storage
摘要
Abstract
Sodium-ion batteries(SIBs)based on Sn-based anodes have attracted increasing attention due to their high theoretical capacity(847 mA·h/g),high electrical conductivity and suitable operation potential. Un?fortunately,the huge structural change upon cycling often causes particle pulverization and rapid capacity de?cay. In this work,ultrafine Sn nanoparticles with dual protection from graphitic carbon nitride(g-C3N4)and polydopamine derived N-doped carbon(g-C3N4/Sn/NC)were successfully fabricated through a designed strate?gy. Generally,the introduction of g-C3N4 and NC can dramatically accelerate the transport of electrons/ions as well as the reaction dynamics,thus contributing to the alloying reaction between Sn and Na+. Importantly,the ultrafine Sn as well as the dual buffering matrices can efficiently maintain the integrity of electrode upon cy?cling,guaranteeing the superior electrochemical performance. Benefitting from the structural advantages inhe-rited from the ultrafine Sn nanoparticles and dual protection scaffolds,the as-obtained g-C3N4/Sn/NC displays excellent sodium storage performances,with high reversible capacity(450.7 mA·h/g at 0.5 A/g after 100 cycles),remarkable rate capability(388.3 mA·h/g at 1.0 A/g)and stable long-term cycling stability(363.3 mA·h/g after 400 cycles at 1.0 A/g).关键词
石墨氮化碳/锡纳米颗粒/氮掺杂碳/储钠负极/钠离子电池Key words
g-C3N4/Sn nanoparticles/N-Doped carbon/Sodium-storage anode/Sodium-ion battery分类
化学化工引用本文复制引用
刘志刚,李家宝,杨剑,马浩,王赪胤,郭鑫,汪国秀..新型石墨化氮化碳/锡/氮掺杂碳复合物的制备及储钠性能[J].高等学校化学学报,2021,42(2):633-642,10.基金项目
国家自然科学基金(批准号:21375116)和江苏省优势学科资助.This work is supported by the National Natural Science Foundation of China(No. 21375116)and the Pri?ority Academic Program Development of Jiangsu Higher Education Institutions,China. （批准号:21375116）
