Ageing of an electrochromic device, especially of the electrolytic layer

电致变色器件的老化，特别是电解质层的老化

• 批准号: 397477553
• 负责人: Professor Dr.-Ing. Hans-Peter Heim
• 金额: --
• 依托单位: Fachgebiet Kunststofftechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/397477553?language=en
• 关键词: Ageing; electrochromic; device; especially; electrolytic

In this research project the ageing behaviour of chromogenic systems basing on polymers shall be investigated. Chromogenic systems (CS) are materials or multilayer systems able to change their colour or transparency by an outer stimulus, like light, voltage, temperature or pressure. A special group of CS are electrochromic devices (ECD), changing their optical properties when voltage is applied. Potential applications can be found everywhere, where panes or displays shall be actively switched. Only few systems are in use at present. All systems that are currently known from application or literature show weaknesses concerning their ageing behaviour.The design of the so-called battery type consists of two polymer substrate halves, both with an electrode layer and an additional counter or working electrode. These sheets are bonded by an ionic conducting, but electrically insulating electrolyte. In this case an appropriate modified PU functions as the electrolyte and laminates the two substrate halves. Compared to liquid or gel-like electrolytes, the curing PU system is advantageous regarding thermal resistance and dimensional stability during further processing like back-injection moulding or thermoforming, as shown in preliminary work of the applicant. Additionally, first investigations showed a much better ageing resistance, also due to fewer interactions with the other layers of the ECD. Because of this, in this project the ageing of this especially for plastic processing suitable ECD type shall be investigated. The research work includes extensive experimental activity, which will be analysed and rendered tangible by means of description with statistic models.

在本研究项目中，将研究基于聚合物的显色体系的老化行为。显色系统（CS）是能够通过外部刺激（如光、电压、温度或压力）改变其颜色或透明度的材料或多层系统。一组特殊的CS是电致变色器件（ECD），当施加电压时改变其光学特性。潜在的应用可以在任何地方找到，其中窗格或显示器应主动切换。目前只有少数系统在使用。所谓的电池类型的设计由两个聚合物半基板组成，两个半基板都具有电极层和附加的反电极或工作电极。这些片通过离子导电但电绝缘的电解质结合。在这种情况下，适当的改性PU用作电解质并层压两个基板半部。与液体或凝胶状电解质相比，固化PU体系在进一步加工（如背面注射成型或热成型）期间的耐热性和尺寸稳定性方面是有利的，如申请人的初步工作中所示。此外，第一次调查显示出更好的耐老化性，这也是由于与ECD的其他层的相互作用较少。因此，在本项目中，应调查其老化情况，尤其是塑料加工适用的ECD类型。研究工作包括广泛的实验活动，将通过统计模型的描述进行分析和呈现。