Ex‐Situ Raman Microscopic Investigation of the High‐Order Polysulfide Restriction of Encapsulated Sulfur Nanowires
Abstract Lithium‐sulfur (Li−S) batteries are attracting significant research attention because of their high theoretical energy density (2500 Wh kg−1) and excellent economic feasibility. However, commercialization has proven difficult owing to their low electronic conductivity and the dissolution of...
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2023-06-01
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| Series: | ChemElectroChem |
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| Online Access: | https://doi.org/10.1002/celc.202300019 |
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| author | Prof. Joo‐Hyung Kim Hye‐Ji Eun Prof. Jihyun Jang Suyoon Eom Prof. Jou‐Hyeon Ahn Dr. Mihye Wu Dr. Jungdon Suk Dr. San Moon |
| author_facet | Prof. Joo‐Hyung Kim Hye‐Ji Eun Prof. Jihyun Jang Suyoon Eom Prof. Jou‐Hyeon Ahn Dr. Mihye Wu Dr. Jungdon Suk Dr. San Moon |
| author_sort | Prof. Joo‐Hyung Kim |
| collection | DOAJ |
| description | Abstract Lithium‐sulfur (Li−S) batteries are attracting significant research attention because of their high theoretical energy density (2500 Wh kg−1) and excellent economic feasibility. However, commercialization has proven difficult owing to their low electronic conductivity and the dissolution of lithium polysulfide (Li2Sx; x=1–8). In particular, lithium polysulfide dissolution is known to be caused by high‐order polysulfide generated at the start of the discharge process. Thus, the control of this factor is important because it determines the electrochemical performance of the cell. In this study, three types of sulfur nanocomposites in the orthorhombic, amorphous, and monoclinic phases, were designed and successfully manufactured. The mechanism of polysulfide generation was confirmed to differ according to the location of sulfur on the carbon matrix (inner pores and surfaces) and allotropic form of sulfur (S4–S8) via electrochemical tests. Furthermore, the electrochemical reaction mechanism was identified by tracing the lithium polysulfide species according to the reaction region using ex‐situ Raman spectroscopy. In this research, suppression of the high‐order polysulfide generation reaction by controlling the monoclinic sulfur was represented by a single plateau galvanostatic curve, suggesting a clear strategy for maximizing cycle stability in next‐generation Li−S batteries |
| first_indexed | 2024-03-13T06:01:21Z |
| format | Article |
| id | doaj.art-9e876e2b90234ead916af75bc82b1c75 |
| institution | Directory Open Access Journal |
| issn | 2196-0216 |
| language | English |
| last_indexed | 2024-03-13T06:01:21Z |
| publishDate | 2023-06-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | ChemElectroChem |
| spelling | doaj.art-9e876e2b90234ead916af75bc82b1c752023-06-12T14:08:40ZengWiley-VCHChemElectroChem2196-02162023-06-011011n/an/a10.1002/celc.202300019Ex‐Situ Raman Microscopic Investigation of the High‐Order Polysulfide Restriction of Encapsulated Sulfur NanowiresProf. Joo‐Hyung Kim0Hye‐Ji Eun1Prof. Jihyun Jang2Suyoon Eom3Prof. Jou‐Hyeon Ahn4Dr. Mihye Wu5Dr. Jungdon Suk6Dr. San Moon7Department of Materials Engineering and Convergence Technology Gyeongsang National University Jinju 52828 (Republic of KoreaKorea Research Institute of Chemical Technology Energy Materials Research Center Daejeon, Korea Yuseong-gu Daejeon 34114 (Republic of KoreaDepartment of Chemistry Sogang University Seoul 04107 (Republic of KoreaSchool of Materials Science and Engineering Gyeongsang National University Jinju 52828 (Republic of KoreaDepartment of Materials Engineering and Convergence Technology Gyeongsang National University Jinju 52828 (Republic of KoreaKorea Research Institute of Chemical Technology Energy Materials Research Center Daejeon, Korea Yuseong-gu Daejeon 34114 (Republic of KoreaKorea Research Institute of Chemical Technology Energy Materials Research Center Daejeon, Korea Yuseong-gu Daejeon 34114 (Republic of KoreaKorea Research Institute of Chemical Technology Energy Materials Research Center Daejeon, Korea Yuseong-gu Daejeon 34114 (Republic of KoreaAbstract Lithium‐sulfur (Li−S) batteries are attracting significant research attention because of their high theoretical energy density (2500 Wh kg−1) and excellent economic feasibility. However, commercialization has proven difficult owing to their low electronic conductivity and the dissolution of lithium polysulfide (Li2Sx; x=1–8). In particular, lithium polysulfide dissolution is known to be caused by high‐order polysulfide generated at the start of the discharge process. Thus, the control of this factor is important because it determines the electrochemical performance of the cell. In this study, three types of sulfur nanocomposites in the orthorhombic, amorphous, and monoclinic phases, were designed and successfully manufactured. The mechanism of polysulfide generation was confirmed to differ according to the location of sulfur on the carbon matrix (inner pores and surfaces) and allotropic form of sulfur (S4–S8) via electrochemical tests. Furthermore, the electrochemical reaction mechanism was identified by tracing the lithium polysulfide species according to the reaction region using ex‐situ Raman spectroscopy. In this research, suppression of the high‐order polysulfide generation reaction by controlling the monoclinic sulfur was represented by a single plateau galvanostatic curve, suggesting a clear strategy for maximizing cycle stability in next‐generation Li−S batterieshttps://doi.org/10.1002/celc.202300019lithium-sulfur batterylithium polysulfidesorthorhombic sulfurmonoclinic sulfurRaman spectroscopy |
| spellingShingle | Prof. Joo‐Hyung Kim Hye‐Ji Eun Prof. Jihyun Jang Suyoon Eom Prof. Jou‐Hyeon Ahn Dr. Mihye Wu Dr. Jungdon Suk Dr. San Moon Ex‐Situ Raman Microscopic Investigation of the High‐Order Polysulfide Restriction of Encapsulated Sulfur Nanowires ChemElectroChem lithium-sulfur battery lithium polysulfides orthorhombic sulfur monoclinic sulfur Raman spectroscopy |
| title | Ex‐Situ Raman Microscopic Investigation of the High‐Order Polysulfide Restriction of Encapsulated Sulfur Nanowires |
| title_full | Ex‐Situ Raman Microscopic Investigation of the High‐Order Polysulfide Restriction of Encapsulated Sulfur Nanowires |
| title_fullStr | Ex‐Situ Raman Microscopic Investigation of the High‐Order Polysulfide Restriction of Encapsulated Sulfur Nanowires |
| title_full_unstemmed | Ex‐Situ Raman Microscopic Investigation of the High‐Order Polysulfide Restriction of Encapsulated Sulfur Nanowires |
| title_short | Ex‐Situ Raman Microscopic Investigation of the High‐Order Polysulfide Restriction of Encapsulated Sulfur Nanowires |
| title_sort | ex situ raman microscopic investigation of the high order polysulfide restriction of encapsulated sulfur nanowires |
| topic | lithium-sulfur battery lithium polysulfides orthorhombic sulfur monoclinic sulfur Raman spectroscopy |
| url | https://doi.org/10.1002/celc.202300019 |
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