摘要
采用溶热法制备了超薄纳米片组成的花状Li_(4)Ti_(5)O_(12)-TiO_(2)(LTO-TO_(2))空心微球。与纯LTO相比,LTO-TO异质结具有更好的储锂性能。作为锂离子电池负极材料,LTO-TO_(2)500次循环5 A/g的大电流密度下表现为高达180.9 mAh/g的可逆容量,而纯LTO的放电容量只有118.4 mAh/g。其优异的电化学性能得益于其独特的分级的花状结构以及LTO与TiO_(2)互补的内在优势。LTO-TO_(2)的电化学性能得以改善主要归因于快速的Li+扩散速率、较小的电荷转移电阻和较好的电极动力学。
Flower-like Li_(4)Ti_(5)O_(12)-TiO_(2)(LTO-TO_(2))hollow microspheres consisting of ultrathin nanosheets are synthesized through a hydrothermal process.In comparison with bare LTO,LTO-TO_(2) heterostructure exhibited much better lithium storage perproty.As anode materials for Li-ion battery(LIBs),LTO-TO_(2) shows high reversible capacity of 180.9 mAh/g at 5 A/g after 500 cycles while the bare LTO only has a discharge capacity of 118.4 mAh/g.The remarkable electrochemical property benefit from the unique hierarchical flower-like structure together with the mutually complementary intrinsic advantages between LTO and TiO_(2).The improved electrochemical property of LTO-TO_(2) might be attributed to fast Li+diffusion rate,smaller charge-transfer resistance and better electrode kinetics.
作者
欧容秀
林诺灵
林志雅
Ou Rongxiu;Lin Nuoling;Lin Zhiya(College of Mathematics and Physics,Ningde Universiyt,Ningde Fujian 352100;College of Physics and Energy,Fujian Normal University,Fujian Provincial Solar Energy Conversion and Energy Storage Engineering Technology Research Center,Fuzhou Fujian 350117)
出处
《山西化工》
2022年第8期1-3,共3页
Shanxi Chemical Industry
基金
福建省自然科学基金(2021J05258)
福建省中青年教师教育科研项目(JAT200684)
宁德师范学院重大培育项目(2021ZDK07)。
