Qin Meng, Li Yueming, Lv Xiao-Jun
State Key Laboratory of Metastable Materials Science and Technology, College of Materials Science and Engineering, Yanshan University, Qinhuangdao 066004, China.
Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300071, China.
Nanomaterials (Basel). 2017 Jun 20;7(6):150. doi: 10.3390/nano7060150.
This work reports on the synthesis of rare earth-doped Li₄Ti₅O nanosheets with high electrochemical performance as anode material both in Li half and Li₄Ti₅O/LiFePO₄ full cell batteries. Through the combination of decreasing the particle size and doping by rare earth atoms (Ce and La), Ce and La doped Li₄Ti₅O nanosheets show the excellent electrochemical performance in terms of high specific capacity, good cycling stability and excellent rate performance in half cells. Notably, the Ce-doped Li₄Ti₅O shows good electrochemical performance as anode in a full cell which LiFePO₄ was used as cathode. The superior electrochemical performance can be attributed to doping as well as the nanosized particle, which facilitates transportation of the lithium ion and electron transportation. This research shows that the rare earth doped Li₄Ti₅O nanosheets can be suitable as a high rate performance anode material in lithium-ion batteries.
这项工作报道了具有高电化学性能的稀土掺杂Li₄Ti₅O纳米片的合成，该纳米片在锂半电池和Li₄Ti₅O/LiFePO₄全电池中作为负极材料。通过减小粒径和稀土原子（Ce和La）掺杂相结合，Ce和La掺杂的Li₄Ti₅O纳米片在半电池中表现出高比容量、良好的循环稳定性和优异的倍率性能等优异的电化学性能。值得注意的是，Ce掺杂的Li₄Ti₅O在以LiFePO₄为正极的全电池中作为负极表现出良好的电化学性能。优异的电化学性能可归因于掺杂以及纳米尺寸的颗粒，这有利于锂离子传输和电子传输。这项研究表明稀土掺杂的Li₄Ti₅O纳米片可适合作为锂离子电池中具有高倍率性能的负极材料。
