科学研究

活动主题：氢气传感器：科学基础、知识产权及科研转化现状研究

活动类型：学术交流

举办单位：碳中和国际研究中心

活动时间：2025-06-06 15:00—16:00

活动地点：会议中心2001

面向群体：全院师生

主讲嘉宾：

Professor Jung-Sik Kim at Beihang University is an internationally renowned scientist with proven research track record in energy materials and their applicable systems.  He has led research of international standing in Built-in Electric Field (BIEF) to realise superconductivity of ions for energy devices and embedded thermal sensing to realise the theoretical efficiency of energy devices against their thermodynamic efficiency.  Responsible for establishing a new research activity at universities, like Imperial College London, Loughborough (UK)/KAIST (Korea)/Beihang (China), and built up an international profile and a team of six research workers whose skills span materials, chemical and mechanical engineering.  Nurtures a group ethos to carry concepts through to demonstrations that support research-informed teaching.  Prof Kim is passionate about bringing the new energy technologies into the mainstream of UG/PG teaching.  Using own invention of embedded micro-/nano-temperature measurement, Thermono©, has paved a new way to understanding fundamental charge creation/diffusion at material interfaces and their thermally driven electro-mechano-chemical behaviour to produce clean fuels (H2) and chemicals from renewable energy sources (e-Fuel).  Hence, excellent & unique tools to demonstrate ultimately efficient electrochemical systems for energy conversion and storage towards C-neutralisation are proposed.

内容摘要：

In high temperature SOFCs (Solid Oxide Fuel Cells), the performance of the cell can be altered by the variation in the temperature distribution throughout the cell/stack. Conventional thermocouples can provide limited information depending on its location in the system. The investigation utilised multi-junction thermal array (MCTA) sensor, Thermono©, to read out the true temperature of the SOFCs whilst working. In this work, the sensitivity of MCTA sensor is assessed. It is directly attached to the cathode surface of the anode-supported SOFC to monitor the temperature of the electrode during temperature ramping, OCV（Open Circuit Voltage） changes during anode reduction. MCTA sensor based readings reveal an area-selected reduction process as well as the effects of direct oxidation on cell’s local temperature.

Beyond this point to exploit the sensor attached SOC(Solid Oxide Cells), it is developed an electrochemical fuel cell based gas composition sensor for monitoring hydrogen purity, within a hydrogen-natural (H2/NG) gas mixture to determine the calorific value. This device traces the hydrogen content within the (predominantly methane) stream, and provides an output current reading which correlates to the level of hydrogen in the stream. Present systems for inspecting gas composition to a necessary accuracy (eg. chromatography) are expensive due to their complexity and are not suitable for use in the field, which impedes their wider adoption. Kim and his group are looking to demonstrate an economical, robust and compact sensing platform which consists of H2 sensing and temperature sensing that can be deployed in point-of-use environments.

联系人：碳中和国际研究中心，陈磊