High-rate, long-term performance of LTO-pillared silicon/carbon composites for lithium-ion batteries anode under high temperature

To address the shortcomings on high-rate and long-term existing in recent silicon/carbon materials as anode of Li-ion batteries, we have synthesized the silicon-cored particles wrapped with multiscale flexible carbon shell pillared by lithium titanate (assigned as Si@LTO@C). With a self-adaptive shell layer effectively against volume expansion of silicon upon lithiation/delithiation, Si@LTO@C renders a reversible capacity of 848 mA h g(-1) at a large current density of 15 A g(-1) after 1000 cycles under a high-temperature of 80 degrees C. Excellent electrochemical performance could be ascribed to a superiorly stable designed 3-demension structure and enhanced kinetics, which has been particular discussed. These conspicuous features undoubtedly enable Si@LTO@C composite to be a promising anode material for high-performance lithium-ion battery under harsh environment. (C) 2019 Elsevier B.V. All rights reserved.