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Waki Lab
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The lab improves battery performance by controlling carbon nanotubes from their nanoscale structure.
AboutAbout the lab
High-performance batteries, built from the nanostructure up.
The Waki Lab uses chemical methods to control the nanoscale structure of carbon nanotubes and zinc oxide nanorods.
Through this, the lab aims to improve the performance of electrochemical devices such as fuel cells, solar cells, and lithium batteries.
Without being bound by conventional methodologies, faculty and students work together to create new battery electrode materials.
The lab's goal is to contribute, even if only a little, to solving problems of energy, the environment, and resources.
Key terms
- Carbon nanotube
- A thin, fiber-like material with a diameter on the nanometer scale, in which carbon atoms are arranged like a tube
- Fuel cell
- A device that reacts a fuel such as hydrogen with oxygen to extract electricity directly
- Perovskite solar cell
- A solar cell that uses a material with a crystal structure called perovskite as its light-absorbing layer and can be made at low temperatures
NewsLab news
View More ↗ResearchResearch themes
Using chemical methods, the lab controls the nanoscale structure of carbon nanotubes and zinc oxide nanorods, aiming to improve the performance of electrochemical devices such as fuel cells, solar cells, and lithium batteries. Its goal is to contribute to solving problems of energy, the environment, and resources by creating new battery electrode materials.
*Illustrative imagePerovskite solar cells
These are next-generation, high-efficiency solar cells that can be made by a simple low-temperature process, but their hole transport layer and gold electrode degrade in humid environments, which lowers stability. The lab uses paper-like electrodes made of multi-walled carbon nanotubes instead, aiming for high efficiency, high durability, and low cost.
*Illustrative imageFuel cells
The lab focuses on multi-walled carbon nanotubes as catalysts and catalyst supports for the oxygen reduction reaction at the cathode of polymer electrolyte and alkaline fuel cells. Using its own method, it creates new carbon structures with defects such as pores, and works to improve performance while investigating the mechanism of surface reactions.
*Illustrative imageDye-sensitized solar cells
The anode adsorbs a dye that absorbs sunlight and collects the dye's excited electrons. To reduce resistance at the crystal interfaces of zinc oxide, the lab fabricates nanorod-shaped anodes by chemical bath deposition and controls their structure, aiming to improve voltage and current.
MembersFaculty
The Waki Lab consists of faculty members, and it is currently recruiting students.As of 2026
- Associate ProfessorKeiko WakiPublications ↗
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Carbon nanotube armchair povray” Arnero / Public domain (cropped)
- Perovskite solar cells: “Perovskite solar cell” Dennis Schroeder / National Renewable Energy Laboratory / Public domain (cropped)
- Fuel cells: “Mutr-nanotubes2” Shaddack / CC BY-SA 3.0 (cropped)
- Dye-sensitized solar cells: “ZnO nanorods” ZhanserikKT / CC BY 4.0 (cropped)
- Related lab (Ihara-Manzhos Lab): “Transmission Lines at Sunset” Kkiefuik / CC BY 4.0 (cropped)
- Related lab (Matsuda Lab): “Robot arm handles an assay plate” National Institute of Allergy and Infectious Diseases / Public domain (cropped)
- Related lab (Tateyama Lab): “Lithium-cobalt-oxide-3D-polyhedra” Ben Mills / Public domain (cropped)
- Related lab (Hirayama Lab): “Coin-cells” Gerhard H Wrodnigg / CC BY-SA 2.5 (cropped)
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