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Sun K, Fu Y, Sekine T, Mabuchi H, Hossain S, Zhang Q, Liu D, Das S, He D, Negishi Y. Metal Nanoclusters as a Superior Polysulfides Immobilizer toward Highly Stable Lithium-Sulfur Batteries. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2304210. [PMID: 37626458 DOI: 10.1002/smll.202304210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 06/16/2023] [Indexed: 08/27/2023]
Abstract
Due to their high designability, unique geometric and electronic structures, and surface coordination chemistry, atomically precise metal nanoclusters are an emerging class of functional nanomaterials at the forefront of materials research. However, the current research on metal nanoclusters is mainly fundamental, and their practical applications are still uncharted. The surface binding properties and redox activity of Au24 Pt(PET)18 (PET: phenylethanethiolate, SCH2 CH2 Ph) nanoclusters are herein harnessed as an high-efficiency electrocatalyst for the anchoring and rapid conversion of lithium polysulfides in lithium-sulfur batteries (LSBs). Au24 Pt(PET)18 @G composites are prepared by using the large specific surface area, high porosity, and conductive network of graphene (G) for the construction of battery separator that can inhibit polysulfide shuttle and accelerate electrochemical kinetics. Resultantly, the LSB using a Au24 Pt(PET)18 @G-based separator presents a high reversible specific capacity of 1535.4 mA h g-1 for the first cycle at 0.2 A g-1 and a rate capability of 887 mA h g-1 at 5 A g-1 . After 1000 cycles at 5 A g-1 , the capacity is 558.5 mA h g-1 . This study is a significant step toward the application of metal nanoclusters as optimal electrocatalysts for LSBs and other sustainable energy storage systems.
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Affiliation(s)
- Kai Sun
- School of Materials and Energy, and LONGi, Institute of Future Technology, Lanzhou University, Lanzhou, 730000, China
| | - Yujun Fu
- School of Materials and Energy, and LONGi, Institute of Future Technology, Lanzhou University, Lanzhou, 730000, China
| | - Taishu Sekine
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
| | - Haruna Mabuchi
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
| | - Sakiat Hossain
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
| | - Qiang Zhang
- School of Materials and Energy, and LONGi, Institute of Future Technology, Lanzhou University, Lanzhou, 730000, China
| | - Dequan Liu
- School of Materials and Energy, and LONGi, Institute of Future Technology, Lanzhou University, Lanzhou, 730000, China
| | - Saikat Das
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
| | - Deyan He
- School of Materials and Energy, and LONGi, Institute of Future Technology, Lanzhou University, Lanzhou, 730000, China
| | - Yuichi Negishi
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
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Zhao Q, Bao X, Meng L, Dong S, Zhang Y, Qing C, Zhu T, Wang HE. Nitrogen-Doped Hollow Carbon@Tin Disulfide as A Bipolar Dynamic Host for Lithium-Sulfur Batteries with Enhanced Kinetics and Cyclability. J Colloid Interface Sci 2023; 644:546-555. [PMID: 37012112 DOI: 10.1016/j.jcis.2023.03.169] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 03/19/2023] [Accepted: 03/25/2023] [Indexed: 03/31/2023]
Abstract
Lithium-sulfur batteries (LSBs) are promising next-generation electrochemical energy storage systems owing to high theoretical specific capacity (1675 mAh/g) and low cost. However, the shuttling effect of soluble polysulfides with slow conversion kinetics has deferred their commercial applications. The feasible design and synthesis of composite cathode hosts offer a promise solution to improving their electrochemical performances. In this work, tin disulfide (SnS2) nanosheets were anchored on nitrogen-doped hollow carbon with mesoporous shells, forming a bipolar dynamic host ("SnS2@NHCS"). It can efficiently confine the polysulfides and promote their conversion during (dis)charge. The as-assembled LSBs delivered a high capacity, superior rate and cyclability. This work presents a new view on the exploration of novel composite electrode materials for various rechargeable batteries with emerging applications.
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