Electrospun CuFe_2O_4 nanotubes as anodes for high-performance lithium-ion batteries  

作　　者：Shengjie Peng Linlin Lia Madhavi Srinivasan 

机构地区：[1]School of Materials Science and Engineering,Nanyang Technological University [2]TUM-CREATE Center for Electromobility,Nanyang Technological University

出　　处：《Journal of Energy Chemistry》2014年第3期301-307,共7页能源化学（英文版）

基　　金：supported by funding from the National Research Foundation,Clean Energy Research Project(Grant Number:NRF2009EWT-CERP001036)

摘　　要：Herein,we report on the synthesis and lithium storage properties of electrospun one-dimensional（1D） CuFe2O4 nanomaterials.1D CuFe2O4nanotubes and nanorods were fabricated by a single spinneret electrospinning method followed by thermal decomposition for removal of polymers from the precursor fibers.The as-prepared CuFe2O4 nanotubes with wall thickness of 50 nm presented diameters of 150 nm and lengths up to several millimeters.It was found that phase separation between the electrospun composite materials occured during the electrospinning process,while the as-spun precursor nanofibers composed of polyacrylonitrile（PAN）,polyvinylpyrrolidone（PVP） and metal salts might possess a core-shell structure（PAN as the core and PVP/metal salts composite as the shell） and then transformed to a hollow structure after calcination.Moreover,as a demonstration of the functional properties of the 1D nanostructure.CuFe2O4 nanotubes and nanorods were investigated as anodes for lithium ion batteries（LIBs）.It was demonstrated that CuFe2O4 nanotubes not only delivered a high reversible capacity of 816 mAh·g-1 at a current density of 200 mA·g-1over 50 cycles,but also showed superior rate capability with respect to counterpart nanorods.Probably,the enhanced electrochemical performance can be attributed to its high specific surface areas as well as the unique hollow structure.Herein,we report on the synthesis and lithium storage properties of electrospun one-dimensional（1D） CuFe2O4 nanomaterials.1D CuFe2O4nanotubes and nanorods were fabricated by a single spinneret electrospinning method followed by thermal decomposition for removal of polymers from the precursor fibers.The as-prepared CuFe2O4 nanotubes with wall thickness of 50 nm presented diameters of 150 nm and lengths up to several millimeters.It was found that phase separation between the electrospun composite materials occured during the electrospinning process,while the as-spun precursor nanofibers composed of polyacrylonitrile（PAN）,polyvinylpyrrolidone（PVP） and metal salts might possess a core-shell structure（PAN as the core and PVP/metal salts composite as the shell） and then transformed to a hollow structure after calcination.Moreover,as a demonstration of the functional properties of the 1D nanostructure.CuFe2O4 nanotubes and nanorods were investigated as anodes for lithium ion batteries（LIBs）.It was demonstrated that CuFe2O4 nanotubes not only delivered a high reversible capacity of 816 mAh·g-1 at a current density of 200 mA·g-1over 50 cycles,but also showed superior rate capability with respect to counterpart nanorods.Probably,the enhanced electrochemical performance can be attributed to its high specific surface areas as well as the unique hollow structure.

关 键 词：ELECTROSPINNING ferrite salts one-dimensional structures nanotubes lithium ion batteries 

分 类 号：TQ340.64[化学工程—化纤工业] TM912[电气工程—电力电子与电力传动]