Mesoporous TiO₂/TiC@C Composite Membranes with Stable TiO₂-C Interface for Robust Lithium Storage

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Transition metal oxide/carbon (TMOs/C) composites are crucial for high-performance lithium-ion batteries (LIBs).
• Developing interface-stable TMOs/C composite anodes for robust lithium storage remains a significant challenge.

Purpose of the Study:

• To synthesize and characterize mesoporous TiO2/TiC@C composite membranes for enhanced lithium storage.
• To investigate the role of TiC nanodots in improving the electrochemical performance and structural stability of TMOs/C anodes.

Main Methods:

• In situ carbothermic reduction method for synthesizing mesoporous TiO2/TiC@C composite membranes.
• Finite element simulations to analyze stress distribution within the membranes during lithiation.
• Electrochemical testing of TiO2/TiC@C membranes as additives and binder-free electrodes in LIBs.

Main Results:

• TiC nanodots enhance electrical conductivity and structural stability at the TiO2-C interface.
• Simulations show TiO2/TiC@C membranes effectively alleviate lithiation-induced stress, enabling robust lithium storage.
• TiO2/TiC@C membranes exhibit excellent cycling capability, rate performance, and potential for flexible LIBs.

Conclusions:

• The developed TiO2/TiC@C composite membranes offer a promising strategy for interface-stable anodes in high-performance LIBs.
• This research opens new avenues for designing advanced composite structures for next-generation energy storage devices, including flexible electronics.