Journal
ACS APPLIED NANO MATERIALS
Volume 5, Issue 11, Pages 16154-16163Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.2c03054
Keywords
Li-ion batteries; anode material; fast charging; boron nanosheets; long cycle life
Funding
- IIT Gandhinagar [EMR/2017/000730]
- Department of Science India
- Armament Research board [DST/INSPIRE/04/2014/001601]
- Dr. Dinesh O Shah Chair Fellowship
- [ARMREB/CDSW/2019/219]
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In this study, the Li-ion storage potential of a hierarchical nanosheet made from titanium diboride was experimentally investigated. The results showed that this nanostructure exhibits high-rate discharge capacity and long cycling stability, making it suitable for high-current applications.
Two-dimensional (2D) materials are enabling us to pursue several exciting avenues to enhance the performance of tures based on transition-metal diborides (TMDs) are theoretically predicted to possess an exceptionally high rate and long cycling stability for Li-ion storage owing to the intrinsic presence of boron honeycomb planes and multivalent transition-metal atoms. In this study, we present the first experimental investigation of the Li-ion storage potential of one such TMD-based nanostructure-titanium diboride (TiB2)-based hierarchical nanosheets (THNS). We demonstrate that THNS can be utilized as a high-rate anode material for Li-ion battery (LIB) and that a discharge capacity as high as similar to 380 mA h g-1 can be obtained at a current rate of 0.025 A g1-galvanostatic charge/discharge. Further, a discharge capacity of 174 mA h g-1 can be obtained at a current rate of 1 A g1-(charge time of similar to 10 min) with a capacity retention of 89.7% after 1000 cycles. We also demonstrate that the THNS-based LIB anode can sustain extremely high current rates (15 to 20 A g1-) allowing ultrafast charging in 9-14 s, and considerable discharge capacity (50 to 60 mA h g-1) with a capacity retention of over 80% after 10 000 cycles. We also present some insights into the charge-storage characteristics of THNS-based anodes using ex situ electrochemical field emission scanning electron microscopy and X-ray photoemission spectroscopy measurements.
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