Journal of Materials Chemistry A

Gwangju Institute of Science and Technology Researchers Design Durable Organic Semiconductor Photocathodes with Metal Foil Encapsulation

Retrieved on: 
Friday, September 23, 2022

GWANGJU, South Korea, Sept. 23, 2022 /PRNewswire/ -- Hydrogen is emerging as a popular eco-friendly alternative to fossil fuel resources owing to its carbon-neutral combustion products (water, electricity, and heat) and is considered to be the next-generation fuel for a zero-emission society. However, the major source of hydrogen is, ironically, fossil fuels.

Key Points: 
  • One way to produce hydrogen in a clean and sustainable manner is through water splitting driven by sunlight.
  • The process, known as "photoelectrochemical (PEC) water splitting" is the basis of operation of organic photovoltaic cells.
  • Now, a team of researchers led by Prof. Sanghan Lee from Gwangju Institute of Science and Technology, Korea, may have finally solved this problem.
  • The team fabricated an organic photovoltaic cell, in which the OS photocathode was covered with titanium foil and well-dispersed platinum nanoparticles.

Gwangju Institute of Science and Technology Scientists Develop a Universal Method for Improving the Lifespan of Lithium-Ion Batteries

Retrieved on: 
Friday, August 12, 2022

GWANGJU, South Korea, Aug. 12, 2022 /PRNewswire/ -- The advent of electric vehicles has given rise to the demand for lithium-ion batteries with high energy densities. This has led to the development of anodes with large charge storage capacity. Unfortunately, this storage capacity tends to degrade over multiple charge/discharge cycles, reducing the battery life.

Key Points: 
  • The short battery life results from an irreversible volume change in the anode during cycling, which causes degradation of electrical contacts and structural collapse.
  • During charging, lithium ions move from the cathode and combine with the nanoparticles in the anode.
  • While the researchers used a silicon anode, the developed method is applicable to other anode materials, such as Sn, Sb, Al and Mg.
  • Moreover, the anodes can be modified regardless of how they were manufactured, making it a universally applicable method for improving battery life.