Tin-based oxides are considered to be promising candidates for lithium-ion battery anode materials due to their high theoretical capacities.However,the low conductivity and drastic volume expansion/contraction during ...Tin-based oxides are considered to be promising candidates for lithium-ion battery anode materials due to their high theoretical capacities.However,the low conductivity and drastic volume expansion/contraction during the reaction with Li+ions greatly limit their practical applications.Herein,we have successfully grown vertically aligned Sn_(3)O_(4) nanoflakes on the carbon fiber cloth substrate by a hydrothermal method,referred to as Sn_(3)O_(4)@CFC.As a binder-free flexible anode for LIBs,this composite can not only accommodate the structural strain upon cycling,but also improve the electrical conductivity.As a consequence,the Sn_(3)O_(4)@CFC electrode manifests high specific capacity and good cycling stability.It exhibits a high specific capacity of around 1500 mA h g^(-1) at 100 mA g^(-1),superior rate capability(835.6 mA h g^(-1) at a high current density up to 2000 mA g^(-1))and good cyclic stability with 66.2%capacity retention over 200 cycles at 1000 mA g^(-1).展开更多
基金supported by the National Natural Science Foundation of China(Grant No.51872334,51874362,and 51572299)the Program for New Century Excellent Talents in University(Grant No.NCET-13-0594)+1 种基金the Innovation-Driven Project of Central South University(Grant No.2017CX001 and 2018CX004)the Natural Science Foundation of Hunan Province,China(Grant No.2018JJ1036).
文摘Tin-based oxides are considered to be promising candidates for lithium-ion battery anode materials due to their high theoretical capacities.However,the low conductivity and drastic volume expansion/contraction during the reaction with Li+ions greatly limit their practical applications.Herein,we have successfully grown vertically aligned Sn_(3)O_(4) nanoflakes on the carbon fiber cloth substrate by a hydrothermal method,referred to as Sn_(3)O_(4)@CFC.As a binder-free flexible anode for LIBs,this composite can not only accommodate the structural strain upon cycling,but also improve the electrical conductivity.As a consequence,the Sn_(3)O_(4)@CFC electrode manifests high specific capacity and good cycling stability.It exhibits a high specific capacity of around 1500 mA h g^(-1) at 100 mA g^(-1),superior rate capability(835.6 mA h g^(-1) at a high current density up to 2000 mA g^(-1))and good cyclic stability with 66.2%capacity retention over 200 cycles at 1000 mA g^(-1).
