Jump to main content
Jump to site search


Close-spaced thermal evaporated 3D Sb2Se3 film for high-rate and high-capacity lithium-ion storage

Abstract

As a key factor for fast-charging lithium-ion batteries (LIBs), high-rate anode materials that can recharge in a few minutes have aroused increasing attention. However, high-rate performance is always accompanied by low theoretical capacities, such as the wildly known high-rate electrode of Li4Ti5O12 (175 mA h g-1), which severely limits its large-scale implementation in the development of high power-density LIBs. Here, we report a modified close-spaced thermal evaporation process to deposit 3D-structured Sb2Se3 films (3D-SSF) with tunable morphology as additive-free anode for LIBs. After a high-rate activation process, 3D-SSF exhibits a flatter discharge plateau than reported results and could deliver a high capacity of 471 mA h g-1 at an ultrahigh current density of 21440 mA g-1, which is superior to the widely known high-rate Li4Ti5O12 anode (over 150 mA h g-1 at 8750 mA g-1). Moreover, we reveal a current-regulated Li-ion storage mechanism that 3D-SFF undergoes a co-functioned conversion and alloying reaction at low current densities while an alloying reaction dominated process at high rates. Beyond that, full-batteries with excellent rate performance were successfully assembled by pairing with the homemade LiFePO4 (LFP) as the cathode.

Back to tab navigation

Article information


Accepted
22 Mar 2021
First published
08 Apr 2021

Nanoscale, 2021, Accepted Manuscript
Article type
Paper

Close-spaced thermal evaporated 3D Sb2Se3 film for high-rate and high-capacity lithium-ion storage

W. Li, L. Deng, X. Wang, J. Cao, Y. Xie, Q. Zhang, H. Zhang, H. Deng and S. Cheng, Nanoscale, 2021, Accepted Manuscript , DOI: 10.1039/D1NR01585K

Social activity

Search articles by author

Spotlight

Advertisements