Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1557853 | Nano Energy | 2014 | 8 Pages |
•Li4Ti5O12/graphene has been synthesized by an advanced MW-HT method.•Li4Ti5O12 microspheres composed of nanoflakes/particles wrapped in graphene sheets.•A superior rate capacity, stable cycling and conductivity than Li4Ti5O12.
Li4Ti5O12 microspheres composed of nanoflakes wrapped in graphene nanosheets have been synthesized by an advanced microwave-hydrothermal (MW-HT) method for the preparation following by an annealing step. Microwave-assisted synthesis processes are appealing, as they can rapidly synthesize materials with a high degree of control of particle size and morphology at low cost. The resultant composite reveals a unique loose structure which could avoid the restacking of graphene sheets and offer rapid lithium ion diffusion paths. Therefore the Li4Ti5O12/graphene electrode has highly desirable properties: a specific capacity approaching the theoretical value, stable cycling, and exceptional rate capability. The composite also can be a good indicator of the remained charge and discharge capacity since it presents a curved charge and discharge line instead of a stable plateau.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide