Delving into the Latest Updates on Fujian Institute of Research on The Structure of Matter with Synapse

Overview

Localized high-concentration electrolytes (LHCEs) offer a new methodology to improve the functionality of conventional electrolytes. Understanding the impact of antisolvents on bulk electrolytes is critical to the construction of sophisticated LHCEs. However, the mechanism of how antisolvent modulates the electrochemical reactivity of the solvation structure in LHCEs remains unclear. In this work, the key correlation between the physicochemical properties of antisolvents and their corresponding Lithium-ion battery (LIBs) systems has been elucidated by comprehensive multiscale theoretical simulations combined with experimental characterizations. Nine antisolvents (chain ethers and cyclic non-ethers) are investigated in a typical lithium bis(fluorosulfonyl)imide/1,2-dimethoxymethane (LiFSI/DME) system. It is highlighted that the relative molecular masses of antisolvents in the same class are positively correlated with the density. The viscosity of a liquid mixture consisting of DME and antisolvent in the same class is positively correlated with the magnitude of the interaction energy between them. Additionally, the self-diffusion coefficient of Li⁺ is also positively correlated with the sum of the interaction energies between Li⁺-DME and Li⁺-FSI^-, which is also affected by the class of antisolvent. These results provide deep insights into the behavior and properties of LHCEs, which help to advance the design of high-performance LIBs.

01 Apr 2025·Talanta

Preparation of REE-doped CaF2 single crystals for accurate determination of REE concentrations in CaF2 crystals via UV-LA-ICP-MS

Article

Author: Zhou, Jianzong ; Ye, Ying ; Li, Haitao ; Tu, Chaoyang ; Wen, Herui ; Sun, Yijian ; Ke, Yuqiu ; Hu, Hui

Accurate determination of rare earth element (REE) concentrations in CaF₂ crystals using UV-LA-ICP-MS is important but challenging due to the lack of matrix-matched reference materials. In this study, a REE-doped CaF₂ single crystal (CaF₂-05), prepared via the Bridgman-Stockbarger technique, was systematically characterized to assess its optical properties, homogeneity, and stability. Analyses using portable laser irradiation, UV-vis spectroscopy, back scatter electron (BSE) imaging, and cathodoluminescence (CL) demonstrated that the crystal possesses high optical quality and exhibits distinct optical adsorption properties compared to the silicate reference material NIST SRM 610. The within-unit variation (S_r) ranged from 3.82 % to 9.86 %, the between-unit S_r varied from 3.94 % to 7.85 %, and the mean square weighted deviation (MSWD) was close to 1, indicating minimal chemical heterogeneity. These results are comparable to those of certified reference materials and other home-made calibration standards. Femtosecond LA-ICP-MS mapping further confirmed the homogeneous distribution of REEs within the CaF₂ crystal. Stability tests conducted from April to November 2024 demonstrated the crystal's good long-term stability. The method's accuracy was validated by calibrating REE concentrations in another CaF₂ single crystal (CaF₂-005), with measured REE concentrations closely matching reference values. The relative deviations (D_r) primarily ranged from -10.10 % to 12.79 %, which is significantly more accurate than the non-matrix-matched calibration using NIST SRM 610. These findings demonstrate that this method provides reliable accuracy and holds promise for application in the accurate determination of REE concentrations in CaF₂-matrix samples, such as CaF₂ luminescent materials and natural fluorite ores.

01 Apr 2025·Journal of Colloid and Interface Science

Novel organic additives with high dipole moments: Improving the anode interface structure to enhance the performance of zinc ion aqueous batteries

Article

Author: Zhang, Xiangxin ; Zhang, Yining ; Liu, Zhipeng ; Yuan, Tao ; Bai, Shuai ; Chen, Junting ; Qiu, Jikai

The reversibility and stability of aqueous zinc-ion batteries (AZIBs) are largely limited by free-water-induced side reactions (e.g., hydrogen evolution and zinc corrosion) and negative zinc dendrite growth. To address these issues, we introduced triethyl 2-phosphonopropionate (Tp), a novel high-dipole-moment electrolyte additive. Tp effectively replaces free water in the electrolyte through strong ion-dipole interactions, altering the solvation structure and suppressing hydrogen evolution and zinc corrosion at the zinc anode. Additionally, the high binding energy between Tp and zinc foil ensures that Tp adheres firmly to the zinc anode surface, while the hydrophobic alkyl chains repel free water, modifying the interfacial structure of the zinc anode, promoting reversible zinc deposition, and effectively suppressing zinc dendrite growth. With these excellent properties, the optimal concentration of Tp enables a cycle time of over 770 h for 1 mA cm^-2 and 1 mAh cm^-2 symmetric cells, which is 7.7 times longer than that of pure electrolyte. Furthermore, the cycle number of Zn//Na₂V₆O₁₆ full cells increased from 600 to 4000 cycles compared to pure electrolyte, with capacity retention improved from 70 % to 92 %. These results highlight the significance of high-dipole moment electrolyte additives, provide new insights into electrolyte modification strategies, and are expected to accelerate the commercialization of AZIBs for practical applications.

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Pipeline

Pipeline Snapshot as of 23 Feb 2025

The statistics for drugs in the Pipeline is the current organization and its subsidiaries are counted as organizations,Early Phase 1 is incorporated into Phase 1, Phase 1/2 is incorporated into phase 2, and phase 2/3 is incorporated into phase 3

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