玫瑰花状SnO_(2)@NC复合材料的制备及其储锂性能研究  

Preparation and lithium storage properties of rose-like SnO_(2)@NC composites

作　　者：杜亚男 孙泽坤 王嘉琦 林志雅 黄志强 DU Ya-nan;SUN Ze-kun;WANG Jia-qi;LIN Zhi-ya;HUANG Zhi-qiang(College of New Energy and Materials,Ningde Normal University,Ningde,Fujian 352100,China;College of Mathematics and Physics,Ningde Normal University,Ningde,Fujian 352100,China;College of Chemistry and Materials,Fujian Normal University,Fuzhou,Fujian 350000,China)

机构地区：[1]宁德师范学院新能源与材料学院,福建宁德352100 [2]宁德师范学院数理学院,福建宁德352100 [3]福建师范大学化学与材料学院,福建福州350000

出　　处：《宁德师范学院学报(自然科学版)》2024年第4期350-355,共6页Journal of Ningde Normal University(Natural Science)

基　　金：宁德师范学院中青年教师科研项目(2020Q106);福建省教育厅中青年教师教育科研项目(JAT200682);福建省自然科学基金青年项目(2023J05203)。

摘　　要：针对SnO_(2)在储锂过程中存在体积膨胀导致容量迅速衰减的问题,设计并且合成一种具有独特的玫瑰花状的氮掺杂碳包覆SnO_(2)负极材料(SnO_(2)@NC),其在储锂过程中表现出良好性能。结果表明,SnO_(2)@NC复合材料在1 A·g^(-1)的电流密度下,经过750次循环后可以达到440.4 mA·h·g^(-1)的高可逆容量。此外,在5 A·g^(-1)的电流密度下,SnO_(2)@NC复合材料也能实现459.5 mA·h·g^(-1)的高比容量。In order to enhance the lithium storage property of SnO_(2)and relieve the rapid capacity fading caused by the large volume expansion during lithiation,a unique rose-like SnO_(2)/N-doped carbon hybrid structure(SnO_(2)@NC)is designed and synthesized for robust lithium storage.The results show that SnO_(2)@NC delivers a high reversible capacity of 440.4 mA·h·g^(-1)after 750 cycles at a current density of 1 A·g^(-1).In addition,a high specific capacity of 459.5 mA·h·g^(-1)even at 5 A·g^(-1)is achieved.

关 键 词：氮掺杂碳玫瑰花状纳米颗粒(SnO_(2)@NC) SnO_(2) 锂离子电池 储锂性能 体积膨胀 

分 类 号：TM912[电气工程—电力电子与电力传动]