Professor Jiang Chunhai (Xiamen University of Technology) and Professor Qiao Yu (Xiamen University) studied the compatibility of typical G2, G3, and G4 ether solvents with Li-metal anode under harsh O₂ environment from the perspectives of Li/Li symmetric batteries and Li-O₂ batteries. The experimental results indicate that G2 solvent helps enhance the cycling stability of Li/Li symmetric batteries, while G4 solvent is more conducive to promoting the reaction reversibility of Li-O₂ batteries.

Researchers have developed a membrane-separated differential electrochemical mass spectrometry (MDEMS) system that enables long-term gas evolution analysis in batteries using volatile electrolytes. By incorporating a graphene oxide-based membrane that selectively blocks organic solvent molecules while allowing gases to pass, the team overcame key limitations of traditional DEMS, which often fail within days due to solvent evaporation and interference. Applying this technique, they uncovered how electrolyte additives and cathode coatings interact to suppress gas-generating side reactions in lithium-ion batteries, providing new insights for extending battery life, especially at high temperatures.

Boosting Biochar's Versatility

Biochar, a carbon-rich material derived from biomass, holds immense promise as a sustainable and renewable resource for diverse applications, from environmental remediation to energy storage. However, its widespread utility has often been hampered by inherent limitations such as low porosity and insufficient surface functionality. These properties are crucial for effective interaction with pollutants, catalytic reactions, and energy storage mechanisms, impacting how efficiently biochar can perform in real-world scenarios.