In RETRIEVE we aim to combine PV upstream value chain organizations with beyond state-of-the-art recycling processes and techniques to improve circularity within the PV sector. RETRIEVE targets the upcycling of the components of the End of Life (EoL) solar panels, enhancing the material quality to meet current requirements for re-introduction into the PV value chain. RETRIEVE will increase the circularity and minimize the environmental impact of the PV industry by developing and demonstrating cost effective recycling technologies for the different components of a solar module; recycle glass to current PV specifications, purify production waste and EoL silicon to solar grade quality, recover silver and heavy metals, and polymer valorization with carbon capture. The final goal is to demonstrate a closed-loop recycling process where recycled glass as well as silicon is re-used in state-of-the-art solar module production, turning the EoL PV panels into sources of new raw materials for the PV manufacture industry. In addition, future PV waste streams for EoL and production waste will be forecasted, and the market potential will be evaluated. By lowering the financial burden of material recovery and increasing the value after recovery, RETRIEVE makes the overall module recycling process more profitable, and the project opens new paths for commercialization. Business cases and market introduction strategies will be developed for a selection of the processes and products.

The core concept of the SALAMANDER project is to develop and integrate embedded sensors and self-healing functionality in Li-ion batteries (LIB) to enhance their quality, reliability, and lifetime. This is achieved by demonstrating “smart” aspects in the battery which analyze indicators of its own degradation and independently respond with external stimuli to trigger on-demand self-healing. To achieve this goal, the project proposes 3 types of sensors with 2 types of self-healing mechanisms to counteract the most threatening and damaging reactions that occur in a typical LIB. On the anode, a resistance sensor array will be printed onto its surface to sense the degree of electrode fracture in the silicon/carbon composite anode. The anode will be embedded with a self-healing polymer network which upon thermal activation helps re-bind the silicon nanoparticles. For the cathode, an electrochemical sensor array is printed onto the separator to sense the dissolution of Mn from the LiNiMnCoO2 (NMC) cathode. To prevent Mn ions from critically degrading the cell, the cathode will be embedded with heat-activated scavenging species which remove these ions. Lastly, an internal temperature sensor helps control the degree of thermal activation. In each degradation scenario, the sensors communicate with the battery management system (BMS), which uses a physics-based model to trigger controlled heating to activate self-healing. Additionally, a life cycle assessment will be conducted to validate the recyclability of the SALAMANDER battery and quantify how the environmental impact of manufacturing is offset by longer-lasting batteries. Thus, although the project’s technology is anticipated to be disruptive at the cell and BMS levels, its design would remain compatible with existing manufacturing and recycling processes. These outcomes thereby help meet the goal of BATTERY 2030+ for a competitive, sustainable European battery value chain and a more circular economy.