摘要
利用聚乙烯吡咯烷酮(PVP)作为聚合物配位剂和燃料,通过溶胶-凝胶PVP辅助燃烧法在800℃到900℃合成了具有不同形貌的锂离子电池负极材料Li_4Ti_5O_(12)。主要研究了不同煅烧温度对材料结构、形貌以及电化学性能的影响。利用XRD、SEM和充放电测试表征Li_4Ti_5O_(12)的结构、形貌及其充放电和倍率性能。研究结果表明材料为尖晶石型结构,颗粒大小分布均匀,颗粒在500 nm左右。在800℃焙烧8 h得到的Li_4Ti_5O_(12)首次充放电容量为167.4 m Ah/g。
Li4Ti5O12 samples were synthesized via a PVP （polyvinylpyrrolidone） assisted gel-combustion method by varying the calcination temperature. The effect of different roasting temperatures on the structure, the morphology, and the electrochemical performance of the Li4Ti5O12 material was analyzed. The cycle performance, the structure and the morphology of the prepared material were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, and charge/discharge test system. The results show that the Li4Ti5O12 powder has a single-phase spinel structure with uniform particles size. The average particle size is 500 nm. The Li4Ti5O12 material synthesized at 800 ℃ for 8 h possesses excellent performance, and its first discharge capacity is 167.4 mAh/g.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2015年第12期2996-2999,共4页
Rare Metal Materials and Engineering
基金
National Natural Science Foundation of China(51374056,51474061,51404055)
Hundreds of Outstanding Innovative Talents in Higher Education Institutions of Hebei Province(II)(BR2-127)
Natural Science Foundation of Hebei Province(E2013501135,E2014501143,2014501010)
New Century Excellent Talents in University(NCET-10-0304)
Basic Scientific Research of Central Colleges,Northeastern University(N100123003,N120523001)
The Key Technologies R&D Program of Qinhuangdao of Hebei Province(201402B005)
The Youth Foundation of Hebei Educational Committee(QN2014325)
