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Han Z, Li X, Li Q, Li H, Xu J, Li N, Zhao G, Wang X, Li H, Li S. Construction of the POMOF@Polypyrrole Composite with Enhanced Ion Diffusion and Capacitive Contribution for High-Performance Lithium-Ion Batteries. ACS APPLIED MATERIALS & INTERFACES 2021; 13:6265-6275. [PMID: 33502845 DOI: 10.1021/acsami.0c20721] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Polyoxometalate (POM) as an "electronic sponge" can store a great number of electrons; however, shortcomings of poor conductivity and solubility in electrolytes cause a significant decrease in specific capacity and poor rate capability. To address the aforementioned disadvantages, a dual strategy was proposed, including coating the conductive polypyrrole (PPy) and utilizing nitrogenous ligands (1,10-phenanthroline monohydrate = 1,10-phen) for metal-organic frameworks (MOFs) to fabricate a [Cu(1,10-phen)(H2O)2]2[Mo6O20]@PPy (Cu-POMOF@PPy) composite, effectively confining the POM in MOFs to avoid dissolution of POM in the electrolyte and improve electrochemical stability. Simultaneously, the PPy shell could improve the conductivity, contribute extra capacity, and alleviate volume variation of Cu-POMOF during cycling. Therefore, the final Cu-POMOF@PPy composite provides an excellent specific capacity of around 769 mA h g-1 at 0.1 A g-1 after 160 cycles and good rate performance, associated with great cycling stability (319 mA h g-1 at 2 A g-1 after 500 cycles). Moreover, the electrochemical reaction mechanism of Cu-POMOF@PPy was investigated by ex situ XPS measurements, indicating that storage of electrons results from the reduction/oxidation of Mo atoms (Mo6+ ↔ Mo4+) and Cu atoms (Cu2+ ↔ Cu0). As a consequence, this work not only proposes a novel method for preparing POM-based lithium-ion batteries but also expands the variety of anode materials.
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Affiliation(s)
- Zhiyuan Han
- College of Physics, University-Industry Joint Center for Ocean Observation and Broadband Communication, Qingdao University, Qingdao 266071, China
| | - Xueying Li
- College of Physics, University-Industry Joint Center for Ocean Observation and Broadband Communication, Qingdao University, Qingdao 266071, China
| | - Qiang Li
- College of Physics, University-Industry Joint Center for Ocean Observation and Broadband Communication, Qingdao University, Qingdao 266071, China
| | - Hongsen Li
- College of Physics, University-Industry Joint Center for Ocean Observation and Broadband Communication, Qingdao University, Qingdao 266071, China
| | - Jie Xu
- College of Physics, University-Industry Joint Center for Ocean Observation and Broadband Communication, Qingdao University, Qingdao 266071, China
| | - Na Li
- School of Sciences, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Guoxia Zhao
- College of Physics, University-Industry Joint Center for Ocean Observation and Broadband Communication, Qingdao University, Qingdao 266071, China
| | - Xia Wang
- College of Physics, University-Industry Joint Center for Ocean Observation and Broadband Communication, Qingdao University, Qingdao 266071, China
| | - Hongliang Li
- School of Materials Science and Engineering, Qingdao University, Qingdao 266071, China
| | - Shandong Li
- College of Physics, University-Industry Joint Center for Ocean Observation and Broadband Communication, Qingdao University, Qingdao 266071, China
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Kaczmarek AM, Van Deun R, Van Hecke K. Holmium, thulium and lutetium-octamolybdate [Mo 8O 28] 8- 1D chains: luminescence investigation of europium doped lutetium-octamolybdate. Dalton Trans 2019; 48:8186-8192. [PMID: 31090761 DOI: 10.1039/c9dt00695h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
In this work we report a novel lanthanide octamolybdate 1D chain type of structure formed with holmium, thulium and lutetium. This is a rare case of compounds built out of [Mo8O28]8- units. These compounds were prepared in a mild reaction synthesis starting from the commonly used heptamolybdate polyoxometalate (POM) [(NH4)6[Mo7O24]. Interestingly, in our previous study we have employed a very similar synthesis route for lanthanides with a larger ionic radius and obtained heptamolybdate clusters. For the lanthanides with a smaller ionic radius (Ho3+, Tm3+ and Lu3+) no crystals could be obtained under those conditions. Only when doubling the amount of the lanthanide salt, single crystals suitable for measurements were obtained. These crystals revealed yet a very different structure from those previously observed. Lanthanide octamolybdate 1D chains were formed. Doubling the amount of the salt for other lanthanide ions still yielded heptamolybdate compounds previously reported by us. The lutetium octamolybdate compound was doped with 1-7.5% of Eu3+ ions yielding emission colors ranging from blue to strong red. Additionally in these materials the excitation wavelength was varied, and it was observed that the materials emission color was excitation-wavelength dependent.
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Affiliation(s)
- Anna M Kaczmarek
- L3- Luminescent Lanthanide Lab, Department of Chemistry, Ghent University, Krijgslaan 281-S3, B-9000 Ghent, Belgium.
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Wang XL, Zhang R, Wang X, Lin HY, Liu GC, Zhang HX. Metal ion-tuned coordination polymers based on different isopolymolybdates grafted by in-situ ligand. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.06.033] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Wang XL, Zhang R, Wang X, Lin HY, Liu GC, Zhang HX. Three novel and various isopolymolybdate-based hybrids built from the carboxyl oxygen atoms of in situ ligands: substituent-tuned assembly, architectures and properties. Dalton Trans 2017; 46:1965-1974. [DOI: 10.1039/c6dt04185j] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three isopolyoxometalate-based hybrids assembled from in-situ generated ligands reveal that the N-donor groups of ligands may play key roles in the self-assembling process and various structures of the title compounds.
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Affiliation(s)
- Xiu-Li Wang
- Department of Chemistry
- Bohai University
- Jinzhou
- P. R. China
| | - Rui Zhang
- Department of Chemistry
- Bohai University
- Jinzhou
- P. R. China
| | - Xiang Wang
- Department of Chemistry
- Bohai University
- Jinzhou
- P. R. China
| | - Hong-Yan Lin
- Department of Chemistry
- Bohai University
- Jinzhou
- P. R. China
| | - Guo-Cheng Liu
- Department of Chemistry
- Bohai University
- Jinzhou
- P. R. China
| | - Hui-Xiu Zhang
- Department of Chemistry
- Bohai University
- Jinzhou
- P. R. China
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Wang HY, Shi T, Chen YG. Molybdenum-oxygen anionic chain grafted by Cu-phen complex. Synthesis, crystal structure and properties. INORG CHEM COMMUN 2016. [DOI: 10.1016/j.inoche.2016.06.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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