Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 25, Issue 9, Pages 1386-1392Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201403648
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [61106118, 61227009, 91321102, U1405253]
- Science and Technology Project of Fujian Province of China [2013H0046]
- Fundamental Research Funds for the Central Universities
- China Scholarship Council (CSC) scholarship under the State Scholarship Fund
Ask authors/readers for more resources
3D micro/nanobatteries in high energy and power densities are drawing more and more interest due to the urgent demand of them in integrating with numerous micro/nanoscale electronic devices, such as smart dust, miniaturized sensors, actuators, BioMEMS chips, and so on. In this study, the electrochemical performances of 3D hexagonal match-like Si/Ge nanorod (NR) arrays buffered by TiN/Ti interlayer, which are fabricated on Si substrates by a cost-effective, wafer scale, and Si-compatible process are demonstrated and systematically investigated as the anode in sodium-ion batteries. The optimized Si/TiN/Ti/Ge composite NR array anode displays superior areal/specific capacities and cycling stability by reason of their favorable 3D nanostructures and the effective conductive layers of TiN/Ti thin films. Sodium-ion insertion behaviors are experimentally investigated in postmorphologies and elemental information of the cycled composite anode, and theoretically studied by the first principles calculation upon the adsorption and diffusion energies of sodium in Ge unit cell. The preferential diffusion of sodium in Ge structure over in Si lattice is evidently proved. The successful configuration of these distinctive wafer-scale Si-based Na-ion micro/nanobattery anodes can provide insight into exploring and designing new Si/Ge-based electrode materials, which can be integrated into micro-electronic devices as on chip power systems in the future.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available