Atomic layer deposited (ALD) SnO2 anodes with exceptional cycleability for Li-ion batteries

We first report the exceptional cycleability of SnO2 anodes by atomic layer deposition (ALD) over directly on stainless steel substrates without any capacity fade for 500 cycles. Perfect choice of cycling potential (5–800 mV vs. Li) and synthesis condition yielded such performance with reversible capacity of 646 mAh g−1 at current density of 5 μA cm−2. Further, SnO2 undergoes the conversion reaction along with alloying reaction enables higher capacity than alloying reaction, however, experiencing severe capacity fade during cycling. Obtained results on SnO2 anodes by ALD technique certainly influence the impact on the development of solid-state, thin film and 3D Li-ion batteries.

Atomic layer deposited (ALD) SnO2 anodes exhibited exceptional cycleability up to 500 cycles between 5 and 800 mV vs. Li in half-cell configuration and this is the best ever cycleability reported on such alloying anodes.Figure optionsDownload as PowerPoint slideHighlights
► Extraordinary cycleability is achieved for atomic layer deposited (ALD) SnO2 anodes for 500 cycles.
► Highly reversible capacity of 646 mAh g−1 is noted between 5 and 800 mV vs. Li testing potential window.
► Exceptional performance of such anode is due to the preparation of SnO2 by ALD and narrow potential window.