Atomic Sn–enabled high-utilization, large-capacity, and long-life Na anode

Xu F, Qu C, Lu Q, Meng J, Zhang X, Xu X, Qiu Y, Ding B, Yang J, Cao F, Yang P, Jiang G, Kaskel S, Ma J, Li L, Zhang X, Wang H (2022)

Publication Type: Journal article

Publication year: 2022


Book Volume: 8

Article Number: eabm7489

Journal Issue: 19

DOI: 10.1126/sciadv.abm7489


Constructing robust nucleation sites with an ultrafine size in a confined environment is essential toward simultaneously achieving superior utilization, high capacity, and long-term durability in Na metal-based energy storage, yet remains largely unexplored. Here, we report a previously unexplored design of spatially confined atomic Sn in hollow carbon spheres for homogeneous nucleation and dendrite-free growth. The designed architecture maximizes Sn utilization, prevents agglomeration, mitigates volume variation, and allows complete alloying-dealloying with high-affinity Sn as persistent nucleation sites, contrary to conventional spatially exposed large-size ones without dealloying. Thus, conformal deposition is achieved, rendering an exceptional capacity of 16 mAh cm−2 in half-cells and long cycling over 7000 hours in symmetric cells. Moreover, the well-known paradox is surmounted, delivering record-high Na utilization (e.g., 85%) and large capacity (e.g., 8 mAh cm−2) while maintaining extraordinary durability over 5000 hours, representing an important breakthrough for stabilizing Na anode.

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How to cite


Xu, F., Qu, C., Lu, Q., Meng, J., Zhang, X., Xu, X.,... Wang, H. (2022). Atomic Sn–enabled high-utilization, large-capacity, and long-life Na anode. Science Advances, 8(19).


Xu, Fei, et al. "Atomic Sn–enabled high-utilization, large-capacity, and long-life Na anode." Science Advances 8.19 (2022).

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