Lithium-ion battery for high temperature applications – HT-LiON

The objective of the present project is the study of lithium-ion batteries operating in unusual ranges of temperatures, impossible to reach with the present technology. Our objective is to fulfill the requirements of high temperature markets: such as [+20 à +150°C] for oil drilling, [-10 à +85°C] for tracking (geolocalization) and temperature above 100°C for the sterilization of medical tools. There is a high level technological challenge: present lithium-ion batteries age rapidly above 60°C. However, it is not an utopia: feasibility of an oil drilling product able to operate at 120°C has recently been demonstrated by the coordinator of the project. However, it is still necessary to progress in terms of calendar life. Feasibility at temperature higher than 120°C has not been demonstrated yet. This is an industrial oriented research project, requiring an important part of fundamental aspects to understand ageing mechanisms and to be able to give orientations towards progress. The use of secondary batteries instead of primary ones has always a positive environmental impact because fewer products are necessary for the same service. Moreover, recycling of lithium-ion battery are in place in Europe. Economical issues are also important. Targeted applications belong to technical markets with a high added value and a significant growth. This project is composed of three partners (one industrial and two national laboratories) with complementary competences. All of them have a long experience in Lithium-ion batteries (electrode materials, electrolytes, surface analysis, cell development and system,...). The first task of this project is to perform a precise analysis of ageing mechanisms at high temperature of a first prototype generation in order to highlight orientations for the improvement studies of task 2 (new electrode solutions) and task 3 (electrolyte optimizations). Results obtained will be progressively integrated in the conception of new prototypes. These new prototype generations will be prepared within the project and will be analysed in terms of performances and ageing at high temperature. Besides, a specific task will be devoted to feasibility of lithium-ion batteries working at 150°C, which will require both new electrolytes and materials. Results will be shared on a scientific level through both publications in international scientific journals and communications in appropriate congress. Economically, the industrial partner will develop prototypes for tests by potential customers.