Quantum dot-based sensing system for high accuracy and high-resolution temperature monitoring of EV batteries

可充电锂离子(Li-ion)电池是汽车电气化、移动通信和消费电子产品的重要组成部分。锂离子电池的可靠、安全运行至关重要，这就要求对电池温度进行实时监测。目前的电池热传感主要集中在沿电池表面放置在战略位置的传感器，这些传感器缺乏空间分辨率来提供完整的热图。因此，每个电池内部的现场温度传感对于电池的安全和效率至关重要。这样的技术解决方案在减少故障和提高安全性方面备受追捧，而量子传感技术由于其体积小、响应速度快和分辨率高而可以提供理想的解决方案。这项国际量子催化剂(量子传感和量子材料)赠款旨在发起一个国际合作伙伴关系，以探索基于石墨烯的量子点传感器在锂离子电池中用于高分辨率和高精度温度传感的可行性。石墨烯量子点(GQD)是单层或几层石墨烯，具有独特而迷人的物理性质，如强量子限制和边缘相关的电学性质，因为电子输运被限制在所有三个空间维度上。通过改变GQD的尺寸、形状和缺陷，研究人员可以为特定的传感应用定制GQD的电学和热学属性。通过优化它们的性能，我们建议开发一种新的基于GQD的灵活、高分辨率和高精度的温度传感器，可以共形安装在电池单元中。这一成果将通过全面培训量子科学、材料和量子传感领域的高素质人员，使加拿大的量子学者和行业受益，从而有助于加强加拿大在量子技术方面的技能。拟议的量子传感器创新和独特的培训预计将为加拿大团队寻求进一步资金以创造传感技术突破奠定坚实基础，从而直接帮助加拿大量子学术界和行业。

Rechargeable Lithium-ion (Li-ion) batteries are an essential part of automotive electrification, mobile communications, and consumer electronics. It is essential that Li-ion batteries operate reliably and safely, which requires real-time temperature monitoring. The current battery thermal sensing focuses on sensors placed at strategic locations along battery surfaces, which lack the spatial resolution to provide a complete thermal map. In situ temperature sensing inside each cell is therefore of paramount importance for the safety and efficiency of batteries. Such a technological solution is highly sought after to reduce failure and improve safety and quantum sensing technology can provide an ideal solution because of its size, ultrafast response, and resolution. This international quantum catalyst (quantum sensing and quantum materials) grant aims to initiate an international partnership to explore the viability of graphene-based quantum dot sensors in Li-ion batteries for high resolution and high accuracy temperature sensing. Graphene quantum dots (GQDs) are single or few layers of graphene that have unique and fascinating physical properties such as strong quantum confinement and edge-dependent electrical properties because the electronic transport is confined in all three spatial dimensions. Modifying their size, shape, and defects allows researchers to tailor the GQDs electrical and thermal properties for specific sensing applications. By optimizing their properties, we propose to develop a new class of GQD-based flexible, high-resolution, and highly precise temperature sensors that can be conformally fitted inside battery cells. The outcome will benefit Canadian quantum academics and industries through the comprehensive training of highly qualified personnel in the field of quantum science, materials, and quantum sensing thus contributing to strengthening Canadian skills in quantum technology. The proposed innovations and unique training in quantum sensors are expected to lay a solid foundation for the Canadian team to seek further funding to create a breakthrough in sensing technology and will thus directly assist the Canadian quantum academic and industry.