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Focused Ion Beam Fabrication of LiPON-based Solid-state Lithium-ion Nanobatteries for In Situ Testing
Published on: March 7, 2018
Tailoring lithiation behavior by interface and bandgap engineering at the nanoscale.
Yang Liu1, Xiao Hua Liu, Binh-Minh Nguyen
1Center for Integrated Nanotechnologies, Sandia National Laboratories , Albuquerque, New Mexico 87185, United States.
Nano Letters
|September 5, 2013
Summary
Researchers developed a new method for lithium-ion batteries using radial heterostructuring. This technique controls lithium ion transport, enabling layer-by-layer axial lithiation for improved battery performance.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Controlling lithium (Li) ion transport and electrode reactions is crucial for high-performance Li-ion batteries.
- Nanoscale engineering of electrode materials offers potential for enhanced ionic transport and battery performance.
Purpose of the Study:
- To demonstrate a novel approach for controlling Li ion insertion pathways at the nanoscale.
- To investigate the impact of radial heterostructuring on Li ion lithiation behavior in nanowires.
Main Methods:
- Fabrication of germanium (Ge) nanowires with conformal, epitaxial, ultrathin silicon (Si) shells.
- Characterization of the lithiation process using advanced microscopy and electrochemical techniques.
Main Results:
- Radial heterostructuring completely suppressed surface Li ion insertion.
- Achieved exclusive axial lithiation along the [111] direction in a layer-by-layer manner.
- Demonstrated that the Si shell acts as a chemical potential barrier, directing Li ion transport.
Conclusions:
- Interface and bandgap engineering can precisely control nanoscale ionic transport and electrochemical reactions.
- This approach offers a new strategy for designing advanced Li-ion battery electrodes.
- Radial heterostructuring presents a promising pathway to enhance Li-ion battery capacity, rate, and lifetime.
