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Atomic layer deposition of ZnO/TiO nanolaminates as ultra-long life anode material for lithium-ion batteries. | LitMetric

Atomic layer deposition of ZnO/TiO nanolaminates as ultra-long life anode material for lithium-ion batteries.

Sci Rep

National Laboratory of Solid State Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Materials Science and Engineering Department, College of Engineering and Applied Sciences, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China.

Published: August 2019

AI Article Synopsis

Article Abstract

In this work, we designed ZnO/TiO nanolaminates by atomic layer deposition (ALD) as anode material for lithium ion batteries. ZnO/TiO nanolaminates were fabricated on copper foil by depositing unit of 26 cycles ZnO/26 cycles TiO repeatedly using ALD. ZnO/TiO nanolaminates are much more stable than pristine ZnO films during electrochemical cycling process. Therefore, ZnO/TiO nanolaminates exhibit excellent lithium storage performance with an improved cycling performance and superior rate capability compared to pristine ZnO films. Moreover, coulombic efficiency (CE) of ZnO/TiO nanolaminates is above 99%, which is much higher than the value of pristine ZnO films. Excellent ultralong-life performance is gained for ZnO/TiO nanolaminates, retaining a reversible capacity of ~667 mAh g within cut-off voltage of 0.05-2.5 V after 1200 cycles of charge-discharge at 500 mA g. Constructing nanolaminates structures via ALD might open up new opportunities for improving the performance of anode materials with large volume expansion in lithium ion batteries.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6687889PMC
http://dx.doi.org/10.1038/s41598-019-48088-2DOI Listing

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