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Li J, Shi Y, Wang J, Liu Q, Luan L, Li Q, Cao Q, Zhang T, Sun H. Cobalt-doped tin disulfide catalysts for high-capacity lithium-air batteries with high lifetime. Phys Chem Chem Phys 2023; 25:26885-26893. [PMID: 37782482 DOI: 10.1039/d3cp02474a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
Dual electrolyte lithium-air batteries have received widespread attention for their ultra-high energy density. However, the low internal redox efficiency of these batteries results in a relatively short operating life. SnS2 is widely used in Li-S batteries, Li-ion batteries, photocatalysis, and other fields due to the high discharge capacity in batteries. However, SnS2 suffers from low electrical conductivity and slow redox kinetics. In this study, Co-doped SnS2 is prepared by hydrothermal method for application in dual-electrolyte lithium-air batteries to study its electrochemical performance and its catalytic reaction process by DFT theory. Conductivity tests show that the Co doping enhances the electrical conductivity of the material and high transmission electron microscopy (HRTEM) results demonstrate that the Co doping of SnS2 increases the grain plane spacing and the material indicates that defects are created on the surface of the material, which is more beneficial to the electrochemical performance of the cell. Co-doped SnS2 exhibits excellent good cycling stability and high discharge capacity in a dual electrolyte lithium-air battery, maintaining a 0.7 V overpotential for 120 h at a current density of 0.1 mA cm-2, with a cell life of over 500 h and an initial discharge capacity showing excellent results up to 16 065 mA h g-1. In addition, this study explores the catalytic activity of Co-doped SnS2 based on density flooding theory (DFT). The results show that Co atoms have a synergistic effect with Sn atoms to perturb the lattice parameters. The calculations show that the catalytic activity is enhanced with the increasing of Co doping content and 3Co-Sn exhibits minimal overpotential.
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Affiliation(s)
- Jie Li
- School of Mechanical Engineering, Shenyang Jianzhu University, No. 25 Middle Road Hunnan, Shenyang, 110168, China.
| | - Yuzhi Shi
- School of Mechanical Engineering, Shenyang Jianzhu University, No. 25 Middle Road Hunnan, Shenyang, 110168, China.
| | - Junhai Wang
- School of Mechanical Engineering, Shenyang Jianzhu University, No. 25 Middle Road Hunnan, Shenyang, 110168, China.
| | - Qianhe Liu
- Human Resources Department, Shenyang Jianzhu University, No. 25 Middle Road Hunnan, Shenyang, 110168, China
| | - Lihua Luan
- School of Mechanical Engineering, Shenyang Jianzhu University, No. 25 Middle Road Hunnan, Shenyang, 110168, China.
| | - Qiang Li
- School of Mechanical Engineering, Shenyang Jianzhu University, No. 25 Middle Road Hunnan, Shenyang, 110168, China.
| | - Qinghao Cao
- School of Mechanical Engineering, Shenyang Jianzhu University, No. 25 Middle Road Hunnan, Shenyang, 110168, China.
| | - Tianyu Zhang
- School of Mechanical Engineering, Shenyang Jianzhu University, No. 25 Middle Road Hunnan, Shenyang, 110168, China.
| | - Hong Sun
- School of Mechanical Engineering, Shenyang Jianzhu University, No. 25 Middle Road Hunnan, Shenyang, 110168, China.
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Huang Y, Ding S, Xu S, Ma ZF, Yuan X. Binder-free SnS2 sheet array with high sulfur vacancy concentration for enhanced lithium storage performance. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.139979] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Ding S, Liu S, Li J, Wu L, Ma ZF, Yuan X. Multifunctional Catalyst CuS for Nonaqueous Rechargeable Lithium-Oxygen Batteries. ACS APPLIED MATERIALS & INTERFACES 2021; 13:50065-50075. [PMID: 34643393 DOI: 10.1021/acsami.1c16231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Copper sulfide with flower-like (f-CuS) and carambola-like (c-CuS) morphologies was successfully synthesized by a facile one-step solvothermal route with different surfactants. When employed as cathode catalysts for lithium-oxygen batteries (LOBs), f-CuS outperforms c-CuS in terms of oxygen electrochemistry, judging from the faster kinetics and the higher reversibility of oxygen reduction/oxidation reactions, as well as the better LOB performance. Moreover, an abnormal high-potential discharge plateau was observed in the discharge profile of the LOB. To understand the different performances of f-CuS and c-CuS and the abnormal high-potential plateau, theoretical calculations were conducted, based on which a mechanism was proposed and verified with experiments. On the whole, CuS can work as a multifunctional catalyst for promoting LOB performance, which means that the dissolved CuS in LiTFSI/TEGDME electrolyte can serve as a liquid catalyst by the redox couples of Cu(TFSI)2/Cu(TFSI)2-/Cu(TFSI)22-, in addition to the function as a traditional solid catalyst in the cathode.
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Affiliation(s)
- Shengqi Ding
- Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Shuang Liu
- Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jingjuan Li
- Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Liang Wu
- Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zi-Feng Ma
- Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xianxia Yuan
- Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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Significant Constraints of SnO
2
, SnS
2
, and SnS
2
/SnO
2
Heterostructures on Mitigating Polysulfide Shuttle Effects in Lithium‐Sulfur Batteries. ChemElectroChem 2021. [DOI: 10.1002/celc.202100138] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Fan X, Huang Y, Wang H, Zheng F, Tan C, Li Y, Lu X, Ma Z, Li Q. Efficacious nitrogen introduction into MoS2 as bifunctional electrocatalysts for long-life Li-O2 batteries. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2020.137653] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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