Ti3 C2 Tx MXene enhanced high-performance LiFePO4 cathode for all-solid-state lithium battery

All-solid-state lithium batteries (ASSLBs) are important for enhancing safety across various applications related to lithium-ion batteries (LIBs). Lithium iron phosphate (LiFePO4 ) is a widely utilized commercial cathode in LIBs, prized for its stable cycling performance, thermal stability, and low cost. However, low electronic conductivity and slow ion diffusion kinetics limit its application at high rates and low temperatures. Herein, Ti3 C2 Tx MXene nanosheets (NSs) are introduced into the LiFePO4 cathode. The continuous electron-conducting networks are constructed due to the high electrical conductivity of Ti3 C2 Tx NSs. Meanwhile, the coordination environment of lithium ions in the cathode is weakened by the oxygenated end groups of Ti3 C2 Tx NSs, and thus efficient ion-percolating networks are constructed. Therefore, the ionic and electronic conductivities of the modified cathode are significantly improved. Assembled allsolid-state LiFePO4 /Li full cells with poly(ethylene oxide) as electrolyte exhibits high initial discharged capacities of 91.5 mAh g-1 at 10 C, and capacities of 155.1 mAh g-1 after 10 0 0 cycles at 1 C with a retention rate of 93.8 %. Furthermore, the cells still deliver excellent performance at high loading, room temperature, and low temperature. This work offers a facile and scalable strategy for designing highperformance ASSLBs. (c) 2025 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.