刺球状Nb2O5的结构调控及其电化学性能  

Structural regulation and electrochemical performanceof prickly spherical Nb2O5

作　　者：黄剑锋[1] 王羽偲嘉 仵婉晨 李嘉胤[1] 罗晓敏 HUANG Jian-feng;WANG Yu-si-jia;WU Wan-chen;LI Jia-yin;LUO Xiao-min(School of Materials Science and Engineering,Functional Material Wet Chemical Synthesis and Technology International S&T Cooperation Platform,Xi′an Key Laboratory of Green Manufacture of Ceramic Materials,Shaanxi University of Science&Technology,Xi′an 710021,China)

机构地区：[1]陕西科技大学材料科学与工程学院功能材料湿化学合成及技术国际科技合作基地西安市陶瓷材料绿色制造重点实验室,陕西西安710021

出　　处：《陕西科技大学学报》2020年第6期93-98,共6页Journal of Shaanxi University of Science & Technology

基　　金：国家自然科学基金项目(51672165);陕西省国际科技合作重点项目(2020KW-038,2020GHJD-04);陕西省科技资源共享平台项目(2020PT-022);陕西省教育厅科学研究计划项目(20JY001);陕西省西安市科技计划项目(2020KJRC0009);西安市陶瓷材料绿色制造重点实验室基金项目(2019220214SYS017CG039)。

摘　　要：Nb2O5由于其插层反应机制,充放电过程体积变化小、长循环稳定性和高安全性等优点,在电极材料领域应用中展现出巨大的发展潜力.然而Nb2O5理论容量较低,导电性较差,限制了其高速充放电性能的发挥.本文通过利用乙醇和水为溶剂,用溶剂热法合成刺球状纳米结构的Nb2O5,通过改变溶剂类型调控Nb2O5结构从而改善其电化学性能.在体积比为V(水)∶V(醇)=1∶1条件下制备的Nb2O5电极形貌均匀,分散性较好,在0.1 A·g-1的电流密度下循环100圈后容量为340.0 mAh·g-1.Due to its intercalation reaction mechanism,small volume change during charging and discharging,long cycle stability and high safety,Nb2O5 has shown great development potential in the application of electrode materials.However,Nb2O5 has a low theoretical capacity and poor conductivity,which limits its high-speed charge and discharge performance.Herein,by using ethanol and water as solvents,solvothermal method was used to synthesize prickly spherical nanostructured Nb2O5,the structure of Nb2O5 was adjusted by changing the solvent type to improve its electrochemical performance.Under the condition that the volume ratio is V(water)∶V(alcohol)=1∶1,the prepared Nb2O5 electrode has a uniform morphology and good dispersion.It delivered a larger capacity of 340 mAh·g-1 at a current density of 0.1 A·g-1 after 100 cycles.

关 键 词：五氧化二铌 刺球状 锂离子电池 

分 类 号：TB34[一般工业技术—材料科学与工程]