Compatibility Issues in Organics Electrode and Effective Prelithiation-Enabled SiC/Polyimide Full Cells

Organic electrode materials are a continuous research hotspot due to their diverse redox mechanisms, flexible application, and well-documented advantages in electrochemical performance. However, the reliable counter electrode is always the biggest obstacle in the way of their practical application, and the compatibility preference of organics adds more difficulty in the full cell fabrication. These issues are mostly obscured in experimental studies where highly excessive metal anode is usually employed. Targeting this sore point, nonmetal SiC anode is used as anode in this work. Through an in-depth investigation of electrode compatibility of the cathode and anode, the distinct electrolyte requirement is revealed. Effective prelithiation is proposed to tackle this. A robust solid electrolyte interphase is built with the assistance of dual film-forming reagents, enabling the SiC/polyimide full cell to achieve hundreds of stable cycles with over 85% capacity retention. Furthermore, subsequent electrolyte adjustments enhance temperature adaptability and fully utilize the low-temperature kinetic advantages of organic electrodes. Herein, it not only offers a solution for fabricating full cells with organic electrodes but also provides deeper insights into the interaction between electrolytes and organic materials, as well as the associated compatibility challenges.