Research on optimizing the scope of impact considering decomposition products in the event of a nitric acid spill chemical accident.

As the size of the chemical industry increases, chemical accidents continue to occur as the handling volume of chemicals also increases. Currently, in the case of a chemical accident, the prediction of the scope of influence mainly analyzes the scope of the impact on a single substance in the accident and does not consider the scope of the decomposition and reaction products. Nitric acid, one of the many chemical accidents, produces nitrogen dioxide, which is harmful when decomposed.

Cycling Stability of Layered Potassium Manganese Oxide in Nonaqueous Potassium Cells.

Potassium-ion batteries have emerged as an alternative to lithium-ion batteries as energy storage systems. In particular, KMnO has attracted considerable attention as a cathode material because of its high theoretical capacity and low cost. In this study, partial substitution of Mn in P3-type KMnO with divalent Ni is performed, resulting in a first discharge capacity of approximately 121 mAh (g-oxide) with 82% retention for 100 cycles.

New Insight into Ethylenediaminetetraacetic Acid Tetrasodium Salt as a Sacrificing Sodium Ion Source for Sodium-Deficient Cathode Materials for Full Cells.

Sacrificing sodium supply sources is needed for sodium-deficient cathode materials to achieve commercialization of sodium-ion full cells using sodium-ion intercalation anode materials. Herein, the potential of ethylenediaminetetraacetic acid tetrasodium salt (EDTA-4Na) as a sacrificing sodium supply source was investigated by intimately blending it with sodium-deficient P2-type Na[AlMn]O. The EDTA-4Na/Na[AlMn]O composite electrode unexpectedly exhibited an improved charge capacity of 177 mA h (g-oxide) compared with the low charge capacity of 83 mA h (g-oxide) for bare Na[AlMn]O.

Unraveling the Role of Earth-Abundant Fe in the Suppression of Jahn-Teller Distortion of P'2-Type NaMnO: Experimental and Theoretical Studies.

Layered NaMnO suffers from capacity loss due to Jahn-Teller (J-T) distortion by Mn ions. Herein, density functional theory calculations suggest Na[Fe Mn]O suppresses the J-T effect. The Fe substitution results in a decreased oxygen-metal-oxygen length, leading to decreases in the b and c lattice parameters but an increase in the a lattice constant.

Effects of β-sheet crystals and a glycine-rich matrix on the thermal conductivity of spider dragline silk.

We measured the thermal conductivity of Araneus ventricosus' spider dragline silk using a suspended microdevice. The thermal conductivity of the silk fiber was approximately 0.4WmK at room temperature and gradually increased with an increasing temperature in a manner similar to that of other disordered crystals or proteins.