螺双吡咯烷阳离子与二甲基/丙烯碳酸盐石墨电极的互钙化行为

IF 3.7 2区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Langmuir Pub Date : 2024-11-19 Epub Date: 2024-11-05 DOI:10.1021/acs.langmuir.4c03435
Jiaxing Qi, Hongyu Wang, Guobao Xu
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引用次数: 0

摘要

季铵盐-石墨插层化合物(QA+-GICs)具有安全、低成本和环保等优点,是一种很有前途的双碳电池负极材料。然而,QA+ 在混合溶剂中插层到石墨电极的行为却从未被报道过。本文将溶解在二甲基/碳酸丙烯酯(DMC/PC)二元溶剂体系中的螺-(1,1')-联吡咯烷四氟硼酸盐用于石墨/活性碳(AC)电容器。螺-(1,1')-联吡咯烷阳离子在石墨中的存储行为与电解质溶液的溶剂成分密切相关。原位 X 射线衍射测试表明,石墨电极在循环过程中会形成不同的 QA+-GIC,这是影响石墨/交流电容器电化学性能的关键因素。此外,还研究了不同电解质的石墨/交流电容器在充放电过程中石墨厚度的可逆变化。这些发现为溶剂与阳离子的共掺杂提供了可靠的证据。
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Intercalation Behavior of a Spiro-bipyrrolidinium Cation into a Graphite Electrode from Dimethyl/Propylene Carbonates.

Quaternary ammonium-graphite intercalation compounds (QA+-GICs) are promising negative electrode materials in dual-carbon batteries by virtue of safety, low cost, and environmental friendliness. However, the intercalation behavior of QA+ into graphite electrodes in mixed solvents has never been reported. Herein, spiro-(1,1')-bipyrrolidinium tetrafluoroborate dissolved in a dimethyl/propylene carbonate (DMC/PC) binary solvent system was employed in graphite/activated carbon (AC) capacitors. The storage behavior of the spiro-(1,1')-bipyrrolidinium cation into graphite is very related to the solvent composition of the electrolyte solutions. In situ X-ray diffraction tests revealed that the graphite electrodes can form different QA+-GICs during cycling, which is a key factor influencing the electrochemical performance of graphite/AC capacitors. Besides, the reversible thickness change of graphite in graphite/AC capacitors with different electrolytes during the charge-discharge process was also addressed. These findings provide sound evidence for the co-intercalation of the solvent with the cation.

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来源期刊
Langmuir
Langmuir 化学-材料科学:综合
CiteScore
6.50
自引率
10.30%
发文量
1464
审稿时长
2.1 months
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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