Tailoring Sodium Carboxymethylcellulose Binders for High-Voltage LiCoO via Thermal Pulse Sintering.

Polyvinylidene fluoride (PVDF), as the commercial cathode binder for lithium-ion batteries, presents several practical challenges, including insufficient conductivity, weak adhesion to active materials, and the use of toxic N-methylpyrrolidone for slurry preparation. However, while most water-soluble binders can address the aforementioned issues, they fail to meet the requirements of high-voltage cathodes. In this work, we innovatively employed a thermal pulse sintering strategy to modify carboxymethyl cellulose sodium (CMC), enabling their application in 4.

Tuning Reaction Kinetics of Fluorinated Molecules to Construct Robust Solid Electrolyte Interphases on SiO Anode.

Introducing fluorinated electrolyte additives to construct LiF-rich solid-electrolyte interphase (SEI) on Si-based anodes is proven an effective strategy for coping with its massive volume changes during cycling. However, most current research on fluorine-containing additives focuses on their thermodynamics of decomposition, lacking studies on the correlation between the molecular structure of additives and their decomposition kinetics. Herein, two fluorinated ester additives, diethyl fluoromalonate (F1DEM) and diethyl 2,2-difluoromalonate (F2DEM) were designed and synthesized.

Electronic and thermal transport properties of the metallic antiferromagnet MnSn.

We report the structure, magnetic and electrical/thermal transport properties of the antiferromagnet MnSn. Importantly, the existence of the two antiferromagnetic states below (∼320 K) is confirmed by magnetism and electrical transport measurements. An unsaturated positive magnetoresistance up to 150% at ∼9 was observed at 5 K, whereas the magnetoresistance becomes negative in the whole range at high temperatures ( > 74 K).