F127/PDA dual-assisted fabricating high dispersed Ge nanoparticles /N-doped porous carbon composites with efficient lithium storage
Nanocrystallization and carbon composite are effective methods to solve the mechanical instability and low conductivity of Ge-based anode materials. In this work, a meaningful phenomenon is discovered that F127 can effectively disperse GeO2 polycrystalline particles, which facilitates the formation...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-09-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423020483 |
| _version_ | 1797646685865771008 |
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| author | Haiwei Yu Mingyue Gao Ming Zhou Hui Gu Xiangjun Zheng Xingmei Guo Yuanjun Liu Fu Cao Qinghong Kong Junhao Zhang |
| author_facet | Haiwei Yu Mingyue Gao Ming Zhou Hui Gu Xiangjun Zheng Xingmei Guo Yuanjun Liu Fu Cao Qinghong Kong Junhao Zhang |
| author_sort | Haiwei Yu |
| collection | DOAJ |
| description | Nanocrystallization and carbon composite are effective methods to solve the mechanical instability and low conductivity of Ge-based anode materials. In this work, a meaningful phenomenon is discovered that F127 can effectively disperse GeO2 polycrystalline particles, which facilitates the formation of Ge nanoparticles embedded in N-doped carbon (Ge/N-C) composites. Polydopamine (PDA) has cross-linking effect, effectively alleviating the reaggregation of GeO2 nanoparticles, and its derived N-doped carbon ensures the uniform dispersion and independent structure of Ge nanoparticles. When assessed as anode material for lithium-ion batteries (LIBs), Ge/N-C composites exhibit a high discharge capacity of 1323 mA h g−1 in the second cycle at 0.2 A g−1 and 981 mA h g−1 after 100 cycles, with a capacity retention rate of 74%. Additionally, the composites show high-rate capability of 959 mA h g−1 at 2 A g−1. The excellent lithium storage performance is attributed to that the synergistic effect between three-dimensional carbon network structure and Ge nanoparticles, which provides stable mechanical structure and abundant redox sites, suppressing volume expansion and accelerating the electrochemical reaction kinetics. |
| first_indexed | 2024-03-11T15:06:17Z |
| format | Article |
| id | doaj.art-e07af0c714014eefbc250c86d4aa4eb4 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-11T15:06:17Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-e07af0c714014eefbc250c86d4aa4eb42023-10-30T06:03:56ZengElsevierJournal of Materials Research and Technology2238-78542023-09-012650555064F127/PDA dual-assisted fabricating high dispersed Ge nanoparticles /N-doped porous carbon composites with efficient lithium storageHaiwei Yu0Mingyue Gao1Ming Zhou2Hui Gu3Xiangjun Zheng4Xingmei Guo5Yuanjun Liu6Fu Cao7Qinghong Kong8Junhao Zhang9School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, ChinaSchool of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, ChinaSchool of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, ChinaSchool of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, ChinaSchool of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China; Corresponding author.School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, ChinaSchool of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, ChinaSchool of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, ChinaSchool of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, ChinaSchool of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China; Corresponding author.Nanocrystallization and carbon composite are effective methods to solve the mechanical instability and low conductivity of Ge-based anode materials. In this work, a meaningful phenomenon is discovered that F127 can effectively disperse GeO2 polycrystalline particles, which facilitates the formation of Ge nanoparticles embedded in N-doped carbon (Ge/N-C) composites. Polydopamine (PDA) has cross-linking effect, effectively alleviating the reaggregation of GeO2 nanoparticles, and its derived N-doped carbon ensures the uniform dispersion and independent structure of Ge nanoparticles. When assessed as anode material for lithium-ion batteries (LIBs), Ge/N-C composites exhibit a high discharge capacity of 1323 mA h g−1 in the second cycle at 0.2 A g−1 and 981 mA h g−1 after 100 cycles, with a capacity retention rate of 74%. Additionally, the composites show high-rate capability of 959 mA h g−1 at 2 A g−1. The excellent lithium storage performance is attributed to that the synergistic effect between three-dimensional carbon network structure and Ge nanoparticles, which provides stable mechanical structure and abundant redox sites, suppressing volume expansion and accelerating the electrochemical reaction kinetics.http://www.sciencedirect.com/science/article/pii/S2238785423020483F127/PDA dual-assisted strategyGe nanoparticlesNitrogen-doped porous carbonBuffering volume expandLithium-ion batteries |
| spellingShingle | Haiwei Yu Mingyue Gao Ming Zhou Hui Gu Xiangjun Zheng Xingmei Guo Yuanjun Liu Fu Cao Qinghong Kong Junhao Zhang F127/PDA dual-assisted fabricating high dispersed Ge nanoparticles /N-doped porous carbon composites with efficient lithium storage Journal of Materials Research and Technology F127/PDA dual-assisted strategy Ge nanoparticles Nitrogen-doped porous carbon Buffering volume expand Lithium-ion batteries |
| title | F127/PDA dual-assisted fabricating high dispersed Ge nanoparticles /N-doped porous carbon composites with efficient lithium storage |
| title_full | F127/PDA dual-assisted fabricating high dispersed Ge nanoparticles /N-doped porous carbon composites with efficient lithium storage |
| title_fullStr | F127/PDA dual-assisted fabricating high dispersed Ge nanoparticles /N-doped porous carbon composites with efficient lithium storage |
| title_full_unstemmed | F127/PDA dual-assisted fabricating high dispersed Ge nanoparticles /N-doped porous carbon composites with efficient lithium storage |
| title_short | F127/PDA dual-assisted fabricating high dispersed Ge nanoparticles /N-doped porous carbon composites with efficient lithium storage |
| title_sort | f127 pda dual assisted fabricating high dispersed ge nanoparticles n doped porous carbon composites with efficient lithium storage |
| topic | F127/PDA dual-assisted strategy Ge nanoparticles Nitrogen-doped porous carbon Buffering volume expand Lithium-ion batteries |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423020483 |
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