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In Situ Supramolecular Self-Assembly Assisted Synthesis of Li4Ti5O12–Carbon-Reduced Graphene Oxide Microspheres for Lithium-Ion Batteries
- Source :
- ACS Sustainable Chemistry & Engineering. 7:916-924
- Publication Year :
- 2018
- Publisher :
- American Chemical Society (ACS), 2018.
-
Abstract
- Li4Ti5O12 (LTO)-carbon (C)-reduced graphene oxide (rGO) microspheres are synthesized via in situ supramolecular self-assembly, combined with spray drying and high-temperature calcination. Dopamine can polymerize on the surface of Ti(OH)4 and form polydopamine, through which graphene oxide(GO) connects with Ti(OH)4 uniformly and tightly to form a homogeneous supramolecular sol system. During the high-temperature calcination, polydopamine is carbonized to carbon to connect LTO with rGO, so that the aggregation of rGO is inhibited, and small-sized LTO particles are obtained. The scanning electron microscopy (SEM) image shows that in the as-prepared LTO-C-rGO microspheres, LTO particles with diameters of ∼50 nm remained homogeneous and wrapped in a three-dimensional network built by the rGO nanosheets. Electrochemical measurements show that the LTO-C-rGO anode exhibits a high reversible capacity of 184 mAh g–1 at 1 C and a high capacity retention of 94.5% after 500 cycles at 20 C. The above excellent electroc...
- Subjects :
- Materials science
Renewable Energy, Sustainability and the Environment
Graphene
Scanning electron microscope
General Chemical Engineering
Oxide
chemistry.chemical_element
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
Electrochemistry
01 natural sciences
0104 chemical sciences
Anode
law.invention
chemistry.chemical_compound
Chemical engineering
chemistry
law
Environmental Chemistry
Calcination
Lithium
Self-assembly
0210 nano-technology
Subjects
Details
- ISSN :
- 21680485
- Volume :
- 7
- Database :
- OpenAIRE
- Journal :
- ACS Sustainable Chemistry & Engineering
- Accession number :
- edsair.doi...........0d6468e7b48586c49382c40c86f51605