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Takeda-Zhu Lab
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The lab studies how to produce metals, based on the electrochemistry of molten salts and the properties of high-temperature melts.
AboutAbout the lab
Molten salts are the future, from production to recycling.
The Takeda-Zhu Lab centers on high-temperature molten salt electrochemistry and works on research ranging from fundamentals to applications.
Because molten salts contain no water, they make it possible to extract metals such as lithium and rare earths, which cannot be obtained by electrolysis in water.
Using this property, the lab works on producing reactive metals and on modifying the surfaces of heat-resistant materials by electroplating.
It also accurately measures the viscosity and surface tension of high-temperature melts such as molten metals and slags, and investigates the fundamental behavior of liquids.
Key terms
- Molten salt
- A liquid made by heating and melting an ionic crystal that is solid at room temperature. It contains no water and can be used for electrolysis at high temperatures.
- High-temperature melt
- A substance that is liquid only at high temperatures, such as molten metal, molten salt, or molten slag.
- Slag
- In metal smelting, a layer of molten oxides that separates from the target metal and floats on top of it.
ResearchResearch themes
Based on high-temperature physical chemistry, the lab works with high-temperature melts such as molten salts, molten metals, and molten metal oxides (slags), and conducts research in four areas: electrochemistry, high-temperature properties, environmental technology, and functional materials. Its themes are wide-ranging, from making materials from raw materials to improving existing processes.
*Illustrative imageDevelopment of molten salt ion batteries
These are batteries that use a molten salt as the electrolyte. They offer low-cost raw materials, fast charging and discharging, and use as large-scale energy storage systems, and are expected to contribute to the future development of power supply systems once put to practical use.
*Illustrative imageOxidation-resistant materials made by molten salt electrolysis
Making thermal power generation more efficient requires materials that withstand high temperatures. The lab uses molten salt electrolysis to siliconize C/C and SiC/C composites, producing carbon-based composite materials with excellent oxidation resistance, and evaluates them.
*Illustrative imageElectrochemistry of rare metal production
Producing metallic lithium is currently a laborious and time-consuming process. Focusing on a method of producing it directly from lithium carbonate, the lab attempts to identify the reacting species, using gas analysis and other methods, in the anode reaction, which has received little research.
*Illustrative imageTransport coefficients of molten silicates
Molten silicates are used as slags and fluxes in smelting processes, and their viscosity and diffusion coefficients must be within appropriate ranges. The lab investigates in detail the effect of fluorides, which strongly influence these properties, and aims to develop slags that also meet environmental standards.
MembersFaculty
The Takeda-Zhu Lab consists of faculty members, researchers, doctoral and master's students, and undergraduate students.As of 2025
- ProfessorOsamu Takeda
- Assistant ProfessorShangping Zhu
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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: “Molten Flinak Salt” Brian Kelleher / CC BY-SA 3.0 (cropped)
- Development of molten salt ion batteries: “Desert Sunlight Battery Energy Storage System ( )” blmcalifornia / Public domain (cropped)
- Oxidation-resistant materials made by molten salt electrolysis: “Silicon Carbide” Beeblaine / CC BY 4.0 (cropped)
- Electrochemistry of rare metal production: “Purified lithium in an ampoule under argon” AdvancedTinkering / CC BY-SA 4.0 (cropped)
- Transport coefficients of molten silicates: “Indiana-Harbor-scrap” Nadine Piatak, USGS / Public domain (cropped)
- Related lab (朱研究室): “FLiBe” ornl.gov / Public domain (cropped)
- Related lab (柴田
（浩） 研究室): “In-stream inoculation addition while molten cast iron is poured to a green sand mold in a foundry in Bangladesh” Sm faysal / CC BY-SA 4.0 (cropped) - Related lab (三木・齋藤研究室): “Blast furnaces at Scunthorpe Steelworks - geograph.org.uk - 5844975” Gareth James / CC BY-SA 2.0 (cropped)
- Related lab (成島・上田研究室): “Root analogue ceramic dental implant vs titanium screw type implant” Logicwhatelse / CC BY-SA 4.0 (cropped)
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