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Rajkumar P, Diwakar K, Subadevi R, Gnanamuthu RM, Wang FM, Liu WR, Sivakumar M. Graphene sheet-encased silica/sulfur composite cathode for improved cyclability of lithium-sulfur batteries. J Solid State Electrochem 2020. [DOI: 10.1007/s10008-020-04747-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Liu T, Zhang Y, Li CH, Marquez MD, Tran HV, Robles Hernández FC, Yao Y, Lee TR. Semihollow Core-Shell Nanoparticles with Porous SiO 2 Shells Encapsulating Elemental Sulfur for Lithium-Sulfur Batteries. ACS APPLIED MATERIALS & INTERFACES 2020; 12:47368-47376. [PMID: 32930564 DOI: 10.1021/acsami.0c10341] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Lithium-sulfur batteries have shown great promise as next-generation high energy density power sources, but their commercial applications are hindered by short battery cycle life arising from the dissolution and shuttling of polysulfides. To address this shortcoming, we prepared two types of semihollow core-shell nanoparticles in which (1) elemental sulfur is encapsulated within a porous silica shell (S@SiO2) and (2) elemental sulfur is encapsulated within a porous silica shell where the inner surface of the shell is decorated with small Au nanoparticles (S@Au@SiO2). These core-shell nanoparticles, both ∼300 nm in diameter, were generated from analogous zinc sulfide-based core-shell nanoparticles (ZnS@SiO2 and ZnS@Au@SiO2, respectively) by converting the ZnS cores to elemental sulfur upon treatment with Fe(NO3)3. With a high surface area and strong host-polysulfide interaction, the SiO2 shells effectively trap the polysulfides; moreover, the internal void space of these nanostructures accommodates the volume expansion of the sulfur core upon lithiation. By decorating ∼5-7 nm Au nanoparticles evenly on the inner surface of the porous SiO2 shells (i.e., S@Au@SiO2), electron transport is enhanced, with consequently enhanced sulfur conversion kinetics at high current rates. Studies of battery performance showed that the S@SiO2 cathode can deliver an initial capacity of 1153 mA h g-1 under 0.2 C and retain 816 mA h g-1 after 100 cycles. More importantly, the Au-decorated S@Au@SiO2 cathode can deliver a high capacity of 500 mA h g-1 under 5 C.
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Affiliation(s)
- Tingting Liu
- Department of Chemistry, University of Houston, Houston, Texas 77204, United States
- Texas Center for Superconductivity, University of Houston, Houston, Texas 77204, United States
| | - Ye Zhang
- Department of Electrical and Computer Engineering, University of Houston, Houston, Texas 77204, United States
- Texas Center for Superconductivity, University of Houston, Houston, Texas 77204, United States
| | - Chien-Hung Li
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Maria D Marquez
- Department of Chemistry, University of Houston, Houston, Texas 77204, United States
- Texas Center for Superconductivity, University of Houston, Houston, Texas 77204, United States
| | - Hung-Vu Tran
- Department of Chemistry, University of Houston, Houston, Texas 77204, United States
- Texas Center for Superconductivity, University of Houston, Houston, Texas 77204, United States
| | - Francisco C Robles Hernández
- Department of Electrical and Computer Engineering, University of Houston, Houston, Texas 77204, United States
- Department of Engineering Technology, and Materials Science and Engineering, University of Houston, Houston, Texas 77204, United States
| | - Yan Yao
- Department of Electrical and Computer Engineering, University of Houston, Houston, Texas 77204, United States
- Texas Center for Superconductivity, University of Houston, Houston, Texas 77204, United States
| | - T Randall Lee
- Department of Chemistry, University of Houston, Houston, Texas 77204, United States
- Texas Center for Superconductivity, University of Houston, Houston, Texas 77204, United States
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Wang Y, Luo S, Wang D, Hong X, Liu S. Facile synthesis of three dimensional porous cellular carbon as sulfur host for enhanced performance lithium sulfur batteries. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.07.141] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Li X, Guo G, Qin N, Deng Z, Lu Z, Shen D, Zhao X, Li Y, Su BL, Wang HE. SnS 2/TiO 2 nanohybrids chemically bonded on nitrogen-doped graphene for lithium-sulfur batteries: synergy of vacancy defects and heterostructures. NANOSCALE 2018; 10:15505-15512. [PMID: 30090890 DOI: 10.1039/c8nr04661a] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Despite their high-energy density, low cost and environmental friendliness, the commercial application of lithium-sulfur batteries (LSBs) has been plagued by their severe capacity decay during long-term cycling caused by polysulfide shuttling. Herein, we demonstrate a synergetic vacancy and heterostructure engineering strategy using a nitrogen-doped graphene/SnS2/TiO2 (denoted as NG/SnS2/TiO2) nanocomposite to enhance the electrochemical performance of LSBs. It is noted that plentiful sulfur vacancy (Vs) defects and nanosized heterojunctions are created on the NG/SnS2/TiO2 composite as proved using electron paramagnetic resonance, transmission electron microscopy and X-ray photoelectron spectroscopy, which can serve as strong adsorption and activation sites for polar polysulfide intermediates, prevent their dissolution/shuttling, and accelerate their redox reaction. The novel NG/SnS2/TiO2-S cathode delivers a high initial capacity of 1064 mA h g-1 at 0.5 C and a high capacity retention rate of 68% after 500 cycles at 0.5 C.
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Affiliation(s)
- Xuecheng Li
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China.
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