摘要
Durability, rate capability, capacity and tap density are paramount performance metrics for promising anode materials, especially for sodium ion batteries. Herein, a carbon free mesoporous CoTiO3 micro-prism with a high tap density （1.8 gcm^-3） is newly developed by using a novel Co-Ti- bimetal organic framework （BMOF） as precursor. It is also interesting to find that the Co-Ti-BMOF derived carbon-free mesoporous CoTiO3 micro-prisms deliver a superior stable and more powerful Na^＋ storage than other similar reported titania, titanate and their carbon composites. Its achieved ca- pacity retention ratio for 2,000 cycles is up to 90.1% at 5 A g^-1.
负极材料的循环、倍率、容量和堆积密度是评价钠离子电池性能的关键指标.为此本工作开发了一种新型的钴-钛双金属-有机框架结构材料并以其作为前躯体衍生制备了具有1.8 gcm^(-3)高堆积密度的无碳介孔钛酸钴微米棱柱状材料.作为钠离子电池负极材料该种材料展示了超高稳定性同时拥有比其他类似的钛氧化物、钛酸盐及其碳基复合材料更优异的倍率性能,其在5 Ag^(-1)的电流密度下循环2000圈后容量保持率高达90.1%.
作者
Zhen-Dong Huang
Ting-Ting Zhangi
Hao Lu
Jike Yang
Ling Bai
Yuehua Chen
Xu-Sheng Yang
Rui-Qing Liu
Xiu-Jing Lin
Yi Li
Pan Li
Xianming Liu
Xiao-Miao Feng
Yan-Wen Ma
黄镇东;张婷婷;陆昊;杨记可;柏玲;陈月花;杨许生;刘瑞卿;林秀婧;李谊;李盼;刘献明;冯晓苗;马延文(Key Laboratory for Organic Electronics and Information Displays ＆ Jiangsu Key Laboratory for Biosensors,Institute of Advanced Materials（IAM）,Jiangsu National Synergetic Innovation Center for Advanced Materials（SICAM）,Nanjing University of Posts ＆ Telecommunications,Nanjing 210023,China;Advanced Manufacturing Technology Research Centre,Department of Industrial and Systems Engineering,Hong Kong Polytechnic University,Hong Kong,China;College of Chemistry and Chemical Engineering,Luoyang Normal University,Luoyang 471022,China)
基金
supported by the National Natural Science Foundation of China(51402155 and 21373107)
Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)(YX03002)
Jiangsu National Synergistic Innovation Center for Advanced Materials(SICAM)
Foundation of NJUPT(NY217077)
PolyU Start-up Fund for New Recruits(No.1-ZE8R)
