Three Birds with One Stone: Multifunctional Separators Based on SnSe Nanosheets Enable High‐Performance Li‐, Na‐ and K‐Sulfur Batteries

Author:

Li Canhuang123,Yang Dawei12,Yu Jing24,Wang Jian5,Zhang Chaoqi26,Yang Tianxiang7,Huang Chen23,Nan Bingfei2,Li Junshan8,Arbiol Jordi49,Zhou Yingtang10,Zhang Qiaobao11,Cabot Andreu29ORCID

Affiliation:

1. Henan Province Key Laboratory of Photovoltaic Materials School of Future Technology Henan University Kaifeng 475004 P. R. China

2. Catalonia Institute for Energy Research‐IREC Sant Adrià de Besòs Barcelona 08930 Spain

3. Department of Chemistry Universitat de Barcelona Barcelona 08028 Spain

4. Catalan Institute of Nanoscience and Nanotechnology (ICN2) CSIC and BIST Campus UAB, Bellaterra Barcelona Catalonia 08193 Spain

5. Helmholtz Institute Ulm (HIU) D89081 Ulm Germany

6. College of Materials Science and Engineering Fuzhou University No.2, Xueyuan Road, Minhou County Fuzhou Fujian 350108 P. R. China

7. School of Environmental Engineering and Chemistry Luoyang Institute of Science and Technology Luoyang Henan 471023 P. R. China

8. Institute for Advanced Study Chengdu University Chengdu 610106 P. R. China

9. ICREA Pg. Lluis Companys Barcelona Catalonia 08010 Spain

10. National Engineering Research Center for Marine Aquaculture Marine Science and Technology College Zhejiang Ocean University Zhoushan Zhejiang 316004 China

11. State Key Laboratory of Physical Chemistry of Solid Surfaces College of Materials Xiamen University Xiamen Fujian 361005 P. R. China

Abstract

AbstractAlkali metal‐sulfur batteries (MSBs) are one of the most promising next‐generation energy storage technologies due to their high energy density and potential for low cost. They are nonetheless constrained by the sluggish conversion of metal polysulfides (MPS) during the charge/discharge process. Herein, a multifunctional separator able to trap the MPS and catalyze their conversion in the three main MSB chemistries, Li‐, Na‐, and K‐MSBs, is demonstrated. More in detail, SnSe nanosheets are introduced as additive into the cathode side of the glass microfiber (GF) separator of the MSB. Taking lithium‐sulfur batteries (LSBs) as an example, it is demonstrated that the GF‐SnSe separator (GF@SnSe) shows strong chemical affinity to lithium polysulfides (LiPS) and superior catalytic activity, inhibiting the transport of LiPSs to the anode and accelerating their conversion. Combining experimental and calculation results, the SnSe additive is shown to decrease the Li2S decomposition energy barrier. Overall, GF@SnSe separators provide significantly improved LSB rate performance and cycling stability with a 0.049% capacity decay per cycle. Besides, the GF@SnSe separator promotes the electrochemical performance of sodium‐sulfur and potassium‐sulfur batteries. Overall, this work presents a significant advancement in the development of multifunctional separators in LSBs as well as the emerging Na‐S and K‐S systems.

Funder

National Natural Science Foundation of China

Generalitat de Catalunya

United Way of Bay Area

Publisher

Wiley

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