Li2O-2B2O3 coating decorated Li4Ti5O12 anode for enhanced rate capability and cycling stability in lithium-ion batteries

Li2O-2B(2)O(3) (LBO) ionic conductor with high conductivity plays an important role in boosting the rate performance and cycling stability of Li4Ti5O12 (LTO) anode for lithium-ion batteries by preventing direct exposure of LTO to the electrolyte. Herein, the effect of LBO coating layer on lithium ion (Li+) storage performance is investigated in detail by adjusting the adding amount of LBO precursor dispersion. LTO coated with 2 wt% LBO achieves an optimum performance with a specific capacity of 172.9 mA h g(-1) at a current density of 0.1 A g(-1), an improved rate capability (specific capacity of 127.9 mA h g(-1) is maintained when the current density is 20 times than 0.1 A g(-1)) and a remarkable cycling stability (capacity retention of 94.2% after 4000 cycles at 2.0 A g(-1)). These LBO-LTO composites are competitive and promising candidates for electrochemical energy storage and other applications. (C) 2020 Elsevier Inc. All rights reserved.

Automated summary

This study investigated the effects of LBO coating on the lithium ion storage performance, finding that LTO coated with 2 wt% LBO exhibited optimal performance at a current density of 0.1 A g(-1), showing improved rate capability and cycling stability. The LBO-LTO composites are competitive and promising candidates for electrochemical energy storage applications.