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。锂离子电池的可靠和安全运行至关重要，这需要实时温度监测。目前的电池热传感主要集中在沿着电池表面的战略位置放置传感器，缺乏空间分辨率来提供完整的热图。因此，每个电池内部的原位温度传感对于电池的安全性和效率至关重要。这种技术解决方案备受追捧，以减少故障和提高安全性，量子传感技术因其尺寸，超快响应和分辨率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）资助旨在启动一个国际合作伙伴关系，探索锂离子电池中基于石墨烯的量子点传感器的可行性，以实现高分辨率和高精度的温度传感。石墨烯量子点（GQDs）是单层或多层石墨烯，具有独特而迷人的物理特性，如强量子约束和边缘相关的电学特性，因为电子输运被限制在所有三个空间维度中。修改它们的尺寸、形状和缺陷使研究人员能够为特定的传感应用定制GQDs的电学和热性能。通过优化其性能，我们建议开发一种新型的基于gqd的柔性，高分辨率和高精度温度传感器，可以在电池单元内保形安装。这一成果将通过对量子科学、材料和量子传感领域高素质人才的全面培训，使加拿大量子学术界和工业界受益，从而有助于加强加拿大在量子技术方面的技能。提出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的资金以在传感技术上取得突破奠定坚实的基础，从而直接协助加拿大量子学术和产业。

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.