ADVANCED FUNCTIONAL MATERIALS
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2023
·
IF 19
Peng-Fang Zhang,Jia-Hui Li,Shao-Jian Zhang,Da-Cheng Li,Su-Yuan Zeng,Shu-Ling Xu,Qing-Xia Yao,Ling-Yang Liu,Lei Ding,Heng-Xiang Li,Yi-Yang Hu,Jun-Tao Li,Yao Zhou
Zn–iodine (I 2 ) battery, as a promising energy storage device, especially under high I 2 loading, is harassed by the shuttle effect of the soluble polyiodide intermediates. Herein, the bifunctional role of 2D carbon nanosponge with rich P-dopant (4.2 at%) and large specific surface area (1966 m 2 g −1 ) in anchoring I 2 /I x − ( x = 1, 3 or 5) and catalyzing their mutual conversion is reported. Both experiment and computational results reveal the transfer of electrons from the P-doped site to iodine species, showing strong interfacial interaction. When being used as a host, it possesses high specific capture capacity for I 2 (3.34 g iodine g −1 or 1.6 mg iodine m −2 ) and I x − (6.12 g triiodide g −1 or 3.1 mg triiodide m −2 ), which thus effectively suppresses the shuttle effect, supported by in situ UV–vis and Raman spectra. In addition to the strong interfacial interaction that favors iodine conversion, the P-doped sites can also catalyze the conversion of I 5 − to I 2 , which is the rate-determining step. Consequently, Zn–I 2 batteries under a high I 2 content (70 wt%) deliver high specific capacity (220.3 mAh g −1 ), superior Coulombic efficiency (>99%), and low self-discharge rate; moreover, they can also operate steadily at 2 A g −1 with ignorable capacity decay for 10 000 cycles.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Menghan Sun,Lishan Wei,Jinsong Peng,Gongyuan Zhao,Dengfeng Yu,Chunxia Chen
Aqueous Zn–I 2 batteries have garnered significant attention due to their high abundance and safety. However, the sluggish iodine redox kinetics and undesirable shuttle effect severely hindered their wider application. Herein, dual doping of B and N provides an effective strategy to modulates chemical properties and electron distributions of carbon hosts, resulting in high performance of Zn–I 2 batteries. The local electron redistribution enhances electron density at the Fermi level of the carbon host, thereby improving intrinsic conductivity. Additionally, combining experiments and DFT calculations reveal that N B center sites are benefited in suppressing shuttle effects, strengthened interactions with iodide species, and facilitated catalytic conversion kinetics. Notably, Zn–I 2 batteries fabricated with B and N co-doped porous carbon (BNAC) achieve an outstanding capacity (231.7 mAh g −1 at 0.1 A g −1 ) and excellent cycling stability (capacitance retention of 98 % after 4,500 cycles). This study not only provides valuable insights into the design of advanced carbon materials but also clarifies the active sites in B/N co-doped carbon materials, offering guidance for the rational design of carbon-based electrode materials for Zn–I 2 batteries.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2025
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IF 7.9
Junwei Ding,Jiaqi Han,Dongfang Ji,Lifeng Han,Kang Zhao,Hewei Luo,Shide Wu,Shiwen Wang,Shaoming Fang
Aqueous zinc-iodine batteries (AZIBs) have broad application prospects in large-scale energy storage due to their intrinsic safety, high energy/power density, and low cost. However, the iodine cathode still faces challenges such as shuttle effect and slow conversion kinetics. Herein, the tungsten-regulated metal-phase vanadium dioxide (W-VO 2 (M)) is proposed to improve the whole performance of AZIBs. First, a heat-treatment method is applied to achieve the phase transition to prepare W-VO 2 (M) from the precursor of the tungsten introduced B-phase vanadium dioxide. Via various characterizations, the successful tungsten introducing is confirmed by occupying the vanadium position and forming the tungsten-oxygen bond in the VO 2 (M) lattice. The obtained W-VO 2 (M) is used as the functional separator modifier of AZIBs, which deliver high capacity, superior rate performance, and long-cycling stability. Specifically, the capacity is 133.8 mAh g −1 after 500 cycles at 1 C. When at 3, 5, 7, 10 C, the corresponding capacities are 127.6, 115.9, 106.5, and 95.5 mAh g −1 , respectively. The battery can stably work 5000 cycles at 10 C. A series of analyses suggest that the W-VO 2 (M) can inhibit shuttle effect and accelerate the iodine conversion kinetics via the adsorbing and anchoring of iodine species. This research provides a new perspective for advanced AZIBs.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
高影响因子
Polymer Chemistry
·
2019
·Vol. 10
·期 29
·3996-4005
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IF 4.76
Feifei Li,Wanting Yang,Mengmeng Li,Lin Lei
A simple white light-emitting diode (LED) induced controlled radical polymerization (CRP) with an in situ bromine–iodine transformation was successfully conducted via organocatalysts. N,N,N′,N′′,N′-Pentamethyldiethylenetriamine (PMDETA), tributylamine (TBA), and hexamethylphosphoric triamide (HMPA) were employed as organocatalysts in this CRP system due to their green, inexpensive, easy-to-handle and highly reactive features. All the three organocatalysts exhibited high efficiency in this CRP system. The polymer molecular weight and distribution (Mw/Mn = 1.02–1.19) of poly(methyl methacrylate) were satisfactory up to fairly high conversions at room temperatures. Well-defined copolymers demonstrated living features of controlled radical polymerization which also indicated that functional methacrylates were also appropriate for this system. Various solvents were added in this CRP system which widely broadened the applicability. Notably, using PMDETA as an organocatalyst for both in situ bromine–iodine transformation CRP and ring-opening polymerization (ROP), poly(methyl methacrylate)-b-poly(L-lactide) (PMMA-b-PLLA) was successfully synthesized in “one-pot”.
研究领域:
高分子化学
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材料科学
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产品关联
DOI
高影响因子
Matter
·
2023
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IF 18.9
Wenda Li,Lingyan Huang,Hongyi Zhang,Yong Wu,Facai Wei,Tingting Zhang,Jianwei Fu,Chengbin Jing,Jiangong Cheng,Shaohua Liu
Construction of covalent organic frameworks (COFs) with fine-tuning pore structures and crystalline orientations at the nano-/meso-scale is vital for their potential applications, but common synthesis routes for COFs always result in the unpredictable nucleation growth and aggregation of small crystals with arbitrary orientations and geometries. Here, we develop a supramolecular mineralization strategy for controllable fabrication of semiconducting COF nanoarchitectures by pre-assembly and subsequent in situ covalent locking of supramolecules. This strategy allows us to change the dynamic covalent chemistry reaction path by reducing the entropy of the system, thus facilitating control over the growth and crystallization of COFs on demand (including 1D, 2D, etc.). The tailor-made COF can effectively suppress the shuttle effect and accelerate the conversion of polyiodide through strong intrinsic electron-pair induce interactions, thereby delivering an outstanding performance in zinc-iodine batteries. The studies create a link between supramolecular chemistry and polymer science for the controllable construction of COF and supramolecular materials.
研究领域:
材料化学
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纳米科学
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电化学
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能源存储
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高分子科学
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超分子化学
✓ 已验证
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2023
·
IF 6
Shusu Ren,Xiang Xu,Jiyuan Sun,Haitao Zhao,Weiwei He,Lifen Zhang,Zhenping Cheng
Antimicrobial resistance is still a major clinical challenge worldwide today and the development of novel antimicrobial agents with high antimicrobial activity and low bacterial resistance is of great importance. In this work, quaternized 2-(dimethylamino) ethylmethacrylates iodonium salt-type monomers with different lengths of pendent alkyl (qDMAEMA(C x ), x = 3, 6 and 8) are synthesized for preparation of a series of cationic porphyrin-based star-shaped (co)polymers by photo-controlled bromine-iodine transformation reversible-deactivation radical polymerization (BIT-RDRP). Especially, qDMAEMA(C x ) not only acts as a monomer but also can be used as an intrinsic catalyst for the BIT-RDRP. In addition, effects of alkyl chain length (x), degree of polymerization and hydrophilic-hydrophobic balance ( H.L.B. ) on the antibacterial activity of the prepared (co)polymers are investigated. The resulting zinc ion coordinated copolymers [email protected] (qDMAEMA(C 8 ) 20 - co -PEGMA 35 ) (denoted as [email protected] ) exhibits good water solubility and is able to be absorbed effectively on the surfaces of bacteria, exhibiting excellent photodynamic inhibition activity against both S. aureus and E. coli under irradiation with 570 nm light source according to the coated plate experiments. The minimum bactericidal concentration (MBC) of [email protected] against S. aureus and E. coli are 1.5 and 2.0 μM, respectively, in the presence of light. Meanwhile, [email protected] shows quite low cytotoxicity and satisfying photolysis ability at working concentrations, displaying promising biological application prospects.
研究领域:
高分子化学
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材料科学
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生物医学工程
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微生物学
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产品关联
DOI
高影响因子
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