Yunju Wang, Xintong Zhang, Yichun Liu, Shunchao Ma, Li Qi, Hongyu Wang
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引用次数: 0
摘要
阴离子插层使石墨成为储能设备中的正极材料，其性能可能会受到溶液中溶剂的影响。因此，研究溶剂在阴离子插层中的作用至关重要。本文研究了四氟硼酸锂（LiBF4）溶液中羧酸酯溶剂γ-丁内酯（GBL）和醋酸甲酯（MA）的分层插层现象，即在同一溶液中生成不同的石墨插层化合物。通过原位 X 射线衍射 (XRD) 测量，讨论了电化学插层和脱插过程中石墨阴极结构的演变模式。在此基础上，详细比较了 GIC 与电位以及浓度之间的关系。此外，还应用了不同表面性质的石墨材料来调整阴离子在石墨片内的溶解状态。
Hierarchical Intercalation of Solvated Tetrafluoroborate Anions into Graphite Electrodes: The Case Studies of Methyl Acetate and γ-Butyrolactone Solutions.
Intercalation of anions unlocks graphite as a positive material in energy storage devices, and the performance could be affected by solvents in solutions. In this context, it is vital to investigate the role of solvents in anion intercalation. Herein, a hierarchical intercalation phenomenon, in which different graphite intercalation compounds are generated in the same solution, is studied in lithium tetrafluoroborate (LiBF4) solutions of carboxylate ester solvents γ-butyrolactone (GBL) and methyl acetate (MA). The evolution modes of the graphite cathode structure during electrochemical intercalation and deintercalation are discussed via in situ X-ray diffraction (XRD) measurements. Based on this, the relationship between GICs and potentials, together with concentrations, is compared in detail. Furthermore, various graphite materials with different surface properties are applied to adjust the anions' solvation status inside graphite sheets.
期刊介绍：
Langmuir is an interdisciplinary journal publishing articles in the following subject categories:
Colloids: surfactants and self-assembly, dispersions, emulsions, foams
Interfaces: adsorption, reactions, films, forces
Biological Interfaces: biocolloids, biomolecular and biomimetic materials
Materials: nano- and mesostructured materials, polymers, gels, liquid crystals
Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry
Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals
However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do?
Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*.
This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).
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