Lithiation MXene Derivative Skeletons for Wide-Temperature Lithium Metal Anodes
KAUST DepartmentPhysical Science and Engineering (PSE) Division
Embargo End Date2022-03-18
Permanent link to this recordhttp://hdl.handle.net/10754/668148
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AbstractLithium (Li) metal, as an appealing candidate for the next-generation of high-energy-density batteries, is plagued by its safety issue mainly caused by uncontrolled dendrite growth and infinite volume expansion. Developing new materials that can improve the performance of Li-metal anode is one of the urgent tasks. Herein, a new MXene derivative containing pure rutile TiO2 and N-doped carbon prepared by heat-treating MXene under a mixing gas, exhibiting high chemical activity in molten Li, is reported. The lithiation MXene derivative with a hybrid of LiTiO2-Li3N-C and Li offers outstanding electrochemical properties. The symmetrical cell assembling lithiation MXene derivative hybrid anode exhibits an ultra-long cycle lifespan of 2000 h with an overpotential of ≈30 mV at 1 mA cm−2, which overwhelms Li-based anodes reported so far. Additionally, long-term operations of 34, 350, and 500 h at 10 mA cm−2 can be achieved in symmetrical cells at temperatures of −10, 25, and 50 °C, respectively. Both experimental tests and density functional theory calculations confirm that the LiTiO2-Li3N-C skeleton serves as a promising host for Li infusion by alleviating volume variation. Simultaneously, the superlithiophilic interphase of Li3N guides Li deposition along the LiTiO2-Li3N-C skeleton to avoid dendrite growth.
CitationWang, J., Yang, M., Zou, G., Liu, D., & Peng, Q. (2021). Lithiation MXene Derivative Skeletons for Wide-Temperature Lithium Metal Anodes. Advanced Functional Materials, 2101180. doi:10.1002/adfm.202101180
SponsorsThe authors greatly acknowledge the financial support from National Natural Science Foundation-Outstanding Youth Foundation (51771162, 51971194) and Hebei Province Talent project (A201910002). They would like to express their gratitude to Ministry of Education Yangtze River scholar professor Program.
JournalAdvanced Functional Materials