Tomšík Elena, Nosov Daniil R, Ivanko Iryna, Pokorný Václav, Konefał Magdalena, Černochová Zulfiya, Tadyszak Krzysztof, Schmidt Daniel F, Shaplov Alexander S
Institute of Macromolecular Chemistry AS CR, Heyrovského Nám. 2, Prague 6, 162 00 Prague, Czech Republic.
Luxembourg Institute of Science and Technology (LIST), 5 Avenue des Hauts-Fourneaux, L-4362 Esch-sur-Alzette, Luxembourg.
Polymers (Basel). 2023 May 29;15(11):2508. doi: 10.3390/polym15112508.
A new method for the preparation of polyaniline (PANI) films that have a 2D structure and can record high active mass loading (up to 30 mg cm) via acid-assisted polymerization in the presence of concentrated formic acid was developed. This new approach represents a simple reaction pathway that proceeds quickly at room temperature in quantitative isolated yield with the absence of any byproducts and leads to the formation of a stable suspension that can be stored for a prolonged time without sedimentation. The observed stability was explained by two factors: (a) the small size of the obtained rod-like particles (50 nm) and (b) the change of the surface of colloidal PANI particles to a positively charged form by protonation with concentrated formic acid. The films cast from the concentrated suspension were composed of amorphous PANI chains assembled into 2D structures with nanofibrillar morphology. Such PANI films demonstrated fast and efficient diffusion of the ions in liquid electrolyte and showed a pair of revisable oxidation and reduction peaks in cyclic voltammetry. Furthermore, owing to the high mass loading, specific morphology, and porosity, the synthesized polyaniline film was impregnated by a single-ion conducting polyelectrolyte-poly(LiM--PEGM) and characterized as a novel lightweight all-polymeric cathode material for solid-state Li batteries by cyclic voltammetry and electrochemical impedance spectroscopy techniques.
开发了一种制备具有二维结构且能通过在浓甲酸存在下的酸辅助聚合记录高活性质量负载（高达30 mg/cm）的聚苯胺（PANI）薄膜的新方法。这种新方法代表了一种简单的反应途径，在室温下能快速进行，以定量分离产率进行，且不存在任何副产物，并导致形成一种稳定的悬浮液，该悬浮液可长时间储存而不沉淀。观察到的稳定性由两个因素解释：（a）所获得的棒状颗粒尺寸小（50 nm），以及（b）通过用浓甲酸质子化，胶体聚苯胺颗粒表面转变为带正电的形式。由浓悬浮液浇铸而成的薄膜由组装成具有纳米纤维形态的二维结构的无定形聚苯胺链组成。这种聚苯胺薄膜在液体电解质中表现出离子的快速有效扩散，并且在循环伏安法中显示出一对可逆的氧化和还原峰。此外，由于高质量负载、特定形态和孔隙率，合成的聚苯胺薄膜被单离子导电聚电解质 - 聚（LiM - - PEGM）浸渍，并通过循环伏安法和电化学阻抗谱技术表征为一种用于固态锂电池的新型轻质全聚合物阴极材料。
