High-performance ultra-low-carbon Geopolymer heat Battery for thermochemical energy storage in net-zero buildings (GeoBattery)

目前，空间供暖占英国能源消耗的25%，碳排放的17%。有效和高效地回收、储存和再利用废热，以及可再生能源，在建筑物供暖的脱碳方面发挥着不可或缺的作用。与相变储热材料和显热储能材料相比，热化学储能材料具有最高的体积能量密度。然而，热化学储能材料的设计和制造仍然面临着成本高、可持续性差、加热功率有限等挑战。对控制循环储能性能和结构稳定性的材料的性质也缺乏基本的了解。这些都给国内应用的热化学储能技术的优化和实施带来了巨大的挑战。该项目采用了土木工程材料的新研究方法，以应对发展热化学储能材料所面临的这些长期挑战。多功能高性能热电池材料将从可持续的低成本土木工程材料土聚合物中开发出来。将通过绿色合成路线开发具有增强热质传递性能和热化学储能能力的轻质土聚合物复合材料。在扩展的无机多孔建材化学机械盐损伤模型的基础上，提出了第一个用于预测热电池材料使用周期寿命的结构稳定性评估模型。该项目开发的材料制造技术和对降解机理的基本了解将被转移到多功能“盐基”TCES复合材料上。该项目开发的成果将极大地提高热能存储技术的可持续性和弹性，用于现有和新建建筑中供暖的脱碳。

Space heating currently accounts for 25% of the UK's energy consumption and 17% of its carbon emissions. The effective and efficient recovery, storage, and reuse of waste heat, together with renewable energy, play indispensable roles in decarbonisation of heating in buildings. The thermochemical energy storage materials possess the highest volumetric energy density comparing to phase change and sensible heat storage materials. However, the design and manufacture of thermochemical energy storage materials are still facing the challenges of high cost, low sustainability, and limited heating power. There also lacks fundamental understandings of the properties of materials that control the cyclic energy storage performances and structural stabilities. These have brought significant challenges to optimisation and implementation of the thermochemical energy storage techniques for domestic application. This project adopts novel research approaches for civil engineering materials to tackle these standing challenges faced by developing thermochemical energy storage materials. Versatile high-performance heat battery materials will be developed from sustainable low-cost civil engineering material geopolymers. Lightweight geopolymer composite materials with enhanced heat and mass transport properties and thermochemical energy storage capacity will be developed through green synthesis routes. The first structural stability assessment model for predicting the service cycle life of heat battery materials will be proposed from the extended chemo-mechanical salt damage model for inorganic porous building materials. The materials fabrication technology and fundamental understanding of the degradation mechanism developed in this project will be transferable to versatile "salt-in-matrix" TCES composites. The outcomes developed from this project will drastically improve the sustainability and resilience of thermal energy storage technologies, for decarbonisation of heating in existing and new-built buildings.