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Xie F, Xu C, Song Y, Liang Q, Ji J, Wang S. 2D-2D heterostructure of ionic liquid-exfoliated MoS 2/MXene as lithium polysulfide barrier for Li-S batteries. J Colloid Interface Sci 2023; 636:528-536. [PMID: 36652828 DOI: 10.1016/j.jcis.2023.01.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/28/2022] [Accepted: 01/06/2023] [Indexed: 01/09/2023]
Abstract
Suppressing the dissolution and shuttling of lithium polysulfides (LiPSs) in electrolytes in lithium-sulfur batteries (LSBs) is the focus of researchers. Herein, functional liquid phase exfoliated MoS2 and MXene (IL-MoS2/MX) interlayer is proposed as the separator of LSBs. The unique alternating intercalation structure of the IL-MoS2/MX interlayer provides a channel for ion transport while achieving uniform Li+ deposition on the anode side. Moreover, IL-MoS2 achieves physical and chemical anchoring to LiPSs and lowers the energy barrier for battery reactions. As a result, the separator in the coin cell delivers an initial capacity of 764.4 mAh·g-1 at 1C and high retention of 58.7 % after 700 cycles, with a decay only 0.059 % per cycle. Simultaneously, the excellent stability is also verified under varying current densities. Beyond that, ionic conductivity and lithium-ion migration number are adopted to confirm unique ion transport channels and uniform deposition of lithium. X-ray photoelectron spectroscopy, S8 and Li2S decomposition and nucleation energy barrier analysis are performed to verify the adsorption and catalytic conversion mechanisms. The convenient preparation and excellent performance of IL-MoS2/MX provide a design strategy for functionalized interlayers for LSBs, and the possibility for commercialization.
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Affiliation(s)
- Fangwei Xie
- School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, PR China.
| | - Chunjie Xu
- School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, PR China
| | - Yaochen Song
- Yangtze Delta Region Institute (QuZhou), University of Electronic Science and Technology of China, Quzhou 313001, PR China
| | - Qi Liang
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science & Technology, Xi'an 710021, PR China
| | - Jinjie Ji
- School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, PR China
| | - Sizhe Wang
- Yangtze Delta Region Institute (QuZhou), University of Electronic Science and Technology of China, Quzhou 313001, PR China; School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science & Technology, Xi'an 710021, PR China.
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Liu Y, Wan Q, Gong J, Liu Z, Tao G, Zhao J, Chen L, Li W, Wei X, Ni L, Song Y. Confine, Defect, and Interface Manipulation of Fe 3 Se 4 /3D Graphene Targeting Fast and Stable Potassium-Ion Storage. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2206400. [PMID: 36504297 DOI: 10.1002/smll.202206400] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/25/2022] [Indexed: 06/17/2023]
Abstract
The fast electrochemical kinetics behavior and long cycling life have been the goals in developing anode materials for potassium ion batteries (PIBs). On account of high electron conductivity and theoretical capacity, transition metal selenides have been deemed as one of the promising anode materials for PIBs. Herein, a systematic structural manipulation strategy, pertaining to the confine of Fe3 Se4 particles by 3D graphene and the dual phosphorus (P) doping to the Fe3 Se4 /3DG (DP-Fe3 Se4 /3DG), has been proposed to fulfill the efficient potassium-ion (K-ion) evolution kinetics and thus boost the K-ion storage performance. The theoretical calculation results demonstrate that the well-designed dual P doping interface can effectively promote K-ion adsorption behavior and provide a low energy barrier for K-ion diffusion. The insertion-conversion and adsorption mechanism for multi potassium storage behavior in DP-Fe3 Se4 /3DG composite has been also deciphered by combining the in situ/ex situ X-ray diffraction and operando Raman spectra evidences. As expected, the DP-Fe3 Se4 /3DG anode exhibits superior rate capability (120.2 mA h g-1 at 10 A g-1 ) and outstanding cycling performance (157.9 mA h g-1 after 1000 cycles at 5 A g-1 ).
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Affiliation(s)
- Yu Liu
- State Key Laboratory of Environment-Friendly Energy Materials, Tianfu Institute of Research and Innovation, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, P. R. China
| | - Qi Wan
- State Key Laboratory of Environment-Friendly Energy Materials, Tianfu Institute of Research and Innovation, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, P. R. China
| | - Juan Gong
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, Sichuan, 621010, P. R. China
| | - Zhiwei Liu
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, P. R. China
| | - Gang Tao
- State Key Laboratory of Environment-Friendly Energy Materials, Tianfu Institute of Research and Innovation, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, P. R. China
| | - Jie Zhao
- State Key Laboratory of Environment-Friendly Energy Materials, Tianfu Institute of Research and Innovation, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, P. R. China
| | - Le Chen
- State Key Laboratory of Environment-Friendly Energy Materials, Tianfu Institute of Research and Innovation, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, P. R. China
| | - Wenshu Li
- State Key Laboratory of Environment-Friendly Energy Materials, Tianfu Institute of Research and Innovation, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, P. R. China
| | - Xijun Wei
- State Key Laboratory of Environment-Friendly Energy Materials, Tianfu Institute of Research and Innovation, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, P. R. China
| | - Ling Ni
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, P. R. China
| | - Yingze Song
- State Key Laboratory of Environment-Friendly Energy Materials, Tianfu Institute of Research and Innovation, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, P. R. China
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