HIPES: Lead-free ferroelectrics for high power energy storage in dielectrics

HIPES：用于电介质高功率储能的无铅铁电体

• 批准号: EP/Y027752/1
• 负责人: Haixue Yan
• 金额: $ 23.84万
• 依托单位: Queen Mary University of London
• 依托单位国家: 英国
• 项目类别: Fellowship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FY027752%2F1
• 关键词: HIPES; Lead; free; ferroelectrics; power

The energy crisis and environmental issues caused by the burning of fossil fuels are major challenges facing mankind. In recent years, energy storage materials have attracted increasing scientific and industrial attention, coupled with the development of green and renewable energy sources. Renewable energies must be transformed into electrical energy for practical uses. In this form, the energy is safe, clean, well-suited to long-distance transportation, and can easily be transformed into other types of energy. Various technologies have been used to store energy from renewable sources. Dielectrics play an important role in high-power energy storage applications, such as electromagnetic devices and hybrid electric vehicles, due to their fast charge-discharge capability (typically in the nanosecond range). However, the energy storage density of commercial dielectric capacitors is very low compared to batteries which have low power density. The energy density of dielectric capacitors is closely related to the electric field-induced transitions in the ferroelectrics. To date, the best ferroelectric materials are based on lead-containing oxides. However, toxicity and environmental concerns have prompted the search for lead-free alternatives. High-entropy materials represent a promising class of disordered multicomponent materials with tailorable properties and potentially unprecedented performances, including excellent dielectric properties. Here, considering the high entropy effect on structures and electrical properties of ferroelectrics, the compositions are designed according to the high entropy concept, and the strategies to improve the energy density in environmentally-friendly lead-free ferroelectrics are proposed to enable the development of these materials for high-power energy storage capacitors.

燃烧化石燃料引起的能源危机和环境问题是人类面临的主要挑战。近年来，储能材料吸引了越来越多的科学和工业关注，再加上绿色和可再生能源的发展。可再生能源必须转化为用于实际用途的电能。以这种形式，能量是安全，干净，非常适合长途运输的，并且可以轻松地转化为其他类型的能量。各种技术已用于从可再生能源中存储能源。介电器在高功率储能应用中起着重要作用，例如电磁设备和混合动力汽车，因为它们的快速充电功能（通常在纳米秒范围内）。但是，与具有低功率密度的电池相比，商用电介质电容器的能量存储密度非常低。介电电容器的能量密度与铁电的电场诱导的过渡密切相关。迄今为止，最好的铁电材料是基于含铅氧化物的。但是，毒性和环境问题促使人们寻求无铅替代方案。高渗透材料代表了具有可定制特性和潜在前所未有的性能，包括出色的介电特性的有前途的多组分材料。在这里，考虑到对铁电的结构和电性能的高熵效应，提出了根据高熵概念设计组成的作品，并提出了提高环境友好型铅铁电极的能量密度的策略，以促进这些材料的高功率储能储能能力的开发。