Catalytic Boosting Bidirectional Polysulfide Redox using Co0.85Se/C Hollow Structure for High-Performance Lithium-Sulfur Batteries
Achieving effective adsorption and fast conversion of soluble polysulfides confined in the sulfur cathode is critical yet challenging for building high-performance lithium-sulfur batteries. Herein, we construct a unique hollow-structured Co0.85Se/C as a separator modifier (CSPP) to effectively suppress the polysulfide shuttle effect. The Co0.85Se/C demonstrates strong anchoring with polysulfide species and smooth bidirectional electrocatalysis. The unique mesoporous hollow architecture affords sufficient catalytic sites and Li+ diffusion channels for promoting the reaction kinetics. Benefiting from the merits, the CSPP-cell could yield a superior electrochemical utilization of active sulfur, excellent rate capability (679 mAh g−1 at 5 C), and stable cycling performance with an ultralow fading rate of 0.056 % per cycle over 500 cycles. The work highlights great promise of developing cobalt-based materials as kinetic regulators for highly stable lithium-sulfur batteries.
This is the peer reviewed version of the following article: Zhang, Xingyuan, Honghui Gu, Chao Shen, Bingqing Wei, and Jian‐Gan Wang. “Catalytic Boosting Bidirectional Polysulfide Redox Using Co0.85 Se/C Hollow Structure for High‐Performance Lithium‐Sulfur Batteries.” ChemElectroChem 9, no. 4 (February 17, 2022). https://doi.org/10.1002/celc.202101557., which has been published in final form at https://doi.org/10.1002/celc.202101557. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited. This article will be embargoed until 02/17/2023.
Co0.85Se, lithium-sulfur batteries, hollow structure, catalytic conversion, separators
Zhang, Xingyuan, Honghui Gu, Chao Shen, Bingqing Wei, and Jian‐Gan Wang. “Catalytic Boosting Bidirectional Polysulfide Redox Using Co0.85 Se/C Hollow Structure for High‐Performance Lithium‐Sulfur Batteries.” ChemElectroChem 9, no. 4 (February 17, 2022). https://doi.org/10.1002/celc.202101557.