Hybrid coating SnO2 for enhanced Li ions storage

Anode SnO2 in lithium-ion batteries suffers from volume expansion and agglomeration. Here, the SnO2 nanoparticles are hybrided with ZrO2 particles by the support of carbon nanotube networks. The ob-tained SnO2/C/ZrO2 composite shows improved electrochemical performances. Investigations reveal that the carbon nanotubes shorten the transmission path of electrons and Li+ ions. Ball milling with ZrO2 pro-motes the formation of nanosized SnO2 to weaken the internal strain change, being beneficial to buffering volume change during electrochemical cycling afterwards. High-resolution 6,7Li NMR investigations indi-cate that conversion and alloying reactions are stepwise involved for SnO2/C/ZrO2 anode. The strategy of designing SnO2/C/ZrO2 composite from the morphology-controlled metal-organic frameworks for energy storage widens the possibility to fabricate promising materials with enhanced performances.& COPY; 2023 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.