ISOBEL · In Situ Observation of Batteries for Extending Lifetime
„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“
- Период
- 2021-08-01 → 2023-07-31
- Финансиране от ЕС
- 212 934 €
- Участници
- 1
- Схема
- MSCA-IF
Линиите свързват координатора с партньорите.
Накратко на български
Литиево-йонните батерии с високо съдържание на никел се анализират чрез рентгенови техники, за да се разберат химичните реакции, които ги развалят. Това помага за удължаване на живота на батериите и подобряване на начина, по който се рециклират материалите в тях.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Резултати накратко
In Situ Observation of Batteries for Extending Lifetime
For the transition of society from being dependent on fossil fuels towards increased use of renewable energy sources, lithium-ion batteries are a key enabling technology. Despite being already widely used in portable electronics and the quickly growing market of plugin-hybrid and full-electric vehicles, further spreading of the technology requires batteries with longer life-time, lower prices, as well as higher energy densities. A considerable portion of the chemical reactions leading to degradation and eventual failure of the cells take place at the interfaces between the electrolyte and the electrodes. It has been found that especially nickel-rich cathode materials are more severely affected by the unwanted reactions with the electrolyte. However detecting these species are difficult due to the very reactive nature of these interfaces, where the surface can react with impurities even in Ar-filled gloveboxes. This project therefore targets developing x-ray based spectroscopic techniques to measure these interfaces without disassembling the cell exposing it to contaminants. Due to the presence of rare elements inside the batteries as well as the energetic processes required to make batteries from raw materials it is especially important to find new ways to recycle batteries where the active material can be recovered and restored to its pristine state before being used in new batteries. The overall objectives of this project are to: -Find out why the unwanted side reactions become more severe for higher nickel content electrodes. -Develop in situ/operando techniques using x-rays to identify the species formed on the battery electrodes. -Improve the recycling of the nickel-rich cathode material.
Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз
Цел на проекта
Lithium-ion batteries (LIBs) are a key technology in enabling the transition from a dependence on fossil fuels towards renewable energy sources. However, increased energy density, cycle life, and recyclability are still needed. The different degradation processes in the LIBs are hard to disentangle from post-mortem measurements alone, as intermediate species cannot be detected and changes may occur during cell disassembly. This project aims to apply novel in situ techniques to directly observe the processes involved in transition metal (TM) dissolution, how this affects electrolyte decomposition at the cathode and anode, and the effect on the stability of the solid electrolyte interphase layer. This will be achieved via novel in-situ X-ray photoelectron spectroscopy (XPS) and x-ray absorption spectroscopy (XAS) measurements that allow electrodes and electrolyte to be simultaneously observed during cycling. This understanding will be used to develop solutions to mitigate TM-dissolution and its impact on cycle life. The focus will be LiNixMn(1-x)/2Co(1-x)/2O2 (NMC) electrodes used in many commercial LIBs, where larger energy densities can be achieved by increasing the nickel content. However, this is accompanied by higher levels of side-reactions from the more reactive surfaces. The electrolyte degradation products coming from NMC materials with different nickel content will be identified and prevented from reaching the graphite electrode by using lithium-ion conducting glass to separate the electrodes. This will help finding out how Ni-rich NMC materials can be stabilized and the extent to which cross talk products contribute to ageing. The project will also investigate new ways to recycling aged NMC to enable their re-use in new cells, decreasing the energy consumption in the recycling and avoiding the disposal of costly and toxic elements. This will include developing heat treatment protocols for replenishing lithium content and restoring the initial structure.
Оригинален текст от CORDIS (на английски).
Участници
- THE CHANCELLOR, MASTERS AND SCHOLARS OF THE UNIVERSITY OF OXFORD · OxfordКоординаторОбединеното кралство
Връзки
Данни: CORDIS, © Европейски съюз