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Fujian Institute of Materials Research has made progress in the synthesis of air electrode electrocatalysts for zinc-air batteries
In recent years, the exploration and development of green energy has led to the research of a series of energy conversion and storage devices including zinc-air batteries (ZAB). ZAB uses an aqueous electrolyte and has the advantages of small size, high energy density, and low cost. It is considered to be an important technical direction for electric energy conversion and energy storage, and has broad prospects in future energy applications. During the charge-discharge process of ZAB, the kinetics of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) on the air electrode are slow, and a large overpotential is required to cause voltage loss, which becomes the core problem restricting the performance of zinc-air batteries. A series of single-atom catalysts (M-NHC, M=Fe, Co, Ni) have been designed and synthesized by Rong Cao and Minna Cao, researchers at the Fujian Institute of the Structure of Matter, Chinese Academy of Sciences. The performance of Fe-NHC in zinc-air batteries was tested. showed higher power density, energy density and stability than commercial catalysts. The catalyst uses the rod-like supramolecules obtained by self-assembly of macrocyclized six-membered cucurbit rings (CB[6]) as carbon precursors, and is synthesized by a simple pyrolysis method after uniformly mixing with inexpensive metal salts. In the synthesis process, with the help of the inherent pore structure inside the cucurbit ring supramolecular self-assembly, a porous N-doped carbon support with a hierarchical micro-mesoporous structure can be prepared without adding a template agent or complicated post-processing process, realizing effective anchoring. It has more efficient mass transfer and electron transfer functions while determining metal single atoms. When assembled into a Zn-air battery, Fe-NHC can achieve a power density of 157 mW/cm2, which is much higher than the 120 mW/cm2 of the commercially available Pt/C and Ir/C hybrid catalysts. During the discharge test at 10 mA/cm2, Fe-NHC was able to sustain for up to 60 hours, while the commercial noble metal catalyst showed severe voltage loss after 4 hours. This work provides an inexpensive, efficient and stable air electrode electrocatalyst for Zn-air batteries by a facile method, and also provides a new strategy for the synthesis of single-atom catalysts by a template-free method.
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Cut resistance is one of the most critical performance indicators in personal protective equipment (PPE) testing, directly affecting worker safety in high-risk industries such as metal processing, machinery manufacturing, and emergency rescue. The TDM Cut Test Machine GT-KC28 plays a vital role in accurately evaluating the cut resistance of PPE products, including gloves, protective clothing, footwear materials, composite materials, rubber, and industrial textiles.
By adopting high-precision force control systems, intelligent data processing, and stable transmission technology, the GT-KC28 TDM Cut Tester can accurately measure the critical cutting force of materials and ensure excellent repeatability and comparability of test results. Its user-friendly touch-screen operation, comprehensive data storage, USB data export, and built-in thermal printer greatly improve laboratory efficiency and data traceability.
The TDM Cut Test Machine GT-KC28 fully complies with major international and national standards such as ISO 13997, EN 388, ASTM F2992/F2992M, ANSI/ISEA 105, and GB 24541-2022, making it a reliable solution for PPE manufacturers, third-party testing laboratories, and research institutions. Through precise and standardized cut resistance testing, the GT-KC28 helps reduce industrial cutting injuries, supports PPE certification across global markets, and ensures that protective equipment delivers reliable safety performance in real-world applications.
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