ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Xiaofei Miao,Qi Chen,Yongchuan Liu,Xiangxin Zhang,Yuanqiang Chen,Junhong Lin,Sujing Chen,Yining Zhang
At present, Zinc-iodine (Zn//I) batteries have attracted much attention due to their high safety and capacity. However, how to suppress the shuttling of polyiodide ions generated during charging processes is still a tricky problem. Herein, polyaniline (PANI) and polypyrrole (PPy) are electro-polymerized on carbon felt (CF) by constant current and used as cathodes for zinc-iodine (Zn//I) batteries. Electrochemical tests of the PANI@CF and PPy@CF electrodes prove that the PANI@CF electrode has a higher capacity, a stronger ability to suppress shuttling of polyiodine ions, and more excellent cyclic stability than the PPy@CF electrode. According to the material characterizations, the differences of both electrodes in electrochemical performances are mainly caused by the microstructures of PANI and PPy in both electrodes. The PANI has a micro-nano porous structure while the PPy is very dense. The porous PANI not only has more channels for the infiltration of electrolyte, but also can provide more active adsorption sites to minimize the shuttling of polyiodide ions to anode, ensuring the excellent performances of the PANI@CF. However, dense PPy seriously hinders the electrolyte diffusion and triggers the formation of an insulating dense iodine film, bringing poor performances to the PPy@CF. Ultimately, the PANI@CF electrodes achieves the most specific capacity of 235.9 mAh g −1 at 0.35 A g −1 (∼1.7 C) and performs out long cycle life with high stability (75.7% capacitiy rention after 10,000 cycles) at 3.5 A g −1 (∼17 C) in Zn//I battery , manifesting the porous PANI@CF electrode is a greatly promising candidate as cathode for Zn//I batteries in actual application.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Yemiao Gao,Shuhan Gao,Xinyang Pang,Dongdong Chu,Weixia Zhu,Jiajia Huang
Zinc-iodine batteries (ZIBs) still suffer from severe shuttle effects and sluggish reaction kinetics of the iodine species, which result in inferior cycle life and unsatisfactory rate performance. Although physical immobilization and chemical adsorption had been used to confine iodine species, the redox kinetics of iodine in ZIBs still needed to be improved. Herein, cobalt (II) phthalocyanines (CoPc) were loaded on actived carbon fiber (ACF) uniformly via π-π interaction and served as I 2 support to fabricate CoPc-ACF/I 2 cathodes materials of ZIBs. Actived carbon fiber (ACF) as effective catalyst support can achieve high dispersion of cobalt phthalocyanine (CoPc) while maintaining high conductivity of composite, and its favorable porous structure is also conducive to iodine loading. The electrocatalytic effect of CoPc can significantly reduce energy barriers and simultaneously accelerate charge transfer to achieve a faster reaction kinetic process for iodine reduction reactions. In particular, the CoPc-ACF matrix shows a remarkably lower Tafel slope (253.4 mV dec −1 ) and lower energy barrier (18.04 kJ mol −1 ) compared with the ACF matrix (395.69 mV dec −1 and 36.25 kJ mol −1 ) for the iodine redox reaction. Consequently, the CoPc-ACF/I 2 cathode delivers a specific capacity of 203.6 mAh g −1 at 0.5 A g −1 , an excellent rate capability with 151.4 mAh g −1 achieved even at 15 A g −1 , and ultra-stable cycle life over 8000 cycles with 89.2% capacity retention. This work provides fresh insight into the design and development for achieving ZIBs with high performance.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Yang Yang,Yunlong Zhou,Peng Ji,Pingping Yang,Jianxiong Xu,Na Li
Zinc-ion hybrid capacitors (ZIHCs) with high energy density is commercial need as energy storing devices, but facile preparation is still a challenge. Herein, we proposed a combined strategy for preparation of ZIHCs with high performance. For this purpose, a nanoemulsion assembly approach with Pluronic F127 as structure-directing agent, 1, 3, 5-trimethylbenzene as pore-expanding agent, polydopamine as carbon and nitrogen source, was used to synthesize hierarchically N-doped porous carbon spheres (N-HNCSs). The optimized sample of N-HNCS-1 exhibited uniform size of 150 nm, hierarchically porous structure, large surface area (705.46 m 2 g −1 ), and N-doping amount of 6.51 %. These properties were beneficial for the transportation of the electrolyte ions resulted in that the N-HNCS-1 electrode displayed superior electrochemical performance with specific capacity of 142 mAh g −1 . Furthermore, the Zn//ZnSO 4 + ZnI 2 //N-HNCS-1 ZIHCs achieves an exceptionally high energy density of 347.7 Wh kg −1 , which is 3-fold higher than that of Zn//ZnSO 4 //N-HNCS-1 ZIHCs. To elucidate this outstanding performance, we investigate the mechanisms involved, including Zn 2+ deposition/stripping, SO 4 2- /I - adsorption/desorption, Zn 4 SO 4 (OH) 6 ⋅0.5 H 2 O precipitation/dissolution, and redox reactions relating to iodine ions . The incorporation of ZnI 2 redox-electrolyte significantly enhanced the energy density by providing prominent pseudocapacitance via the faradaic reaction. Therefore, the high performance of Zn//ZnSO 4 + ZnI 2 //N-HNCS-1 ZIHCs is attributed to the introduction of nitrogen (N) species, advantageous 3D carbonaceous framework, and redox reactions triggered by adding zinc iodide (ZnI 2 ) into the aqueous zinc sulfate (ZnSO 4 ) electrolyte. This groundbreaking research opens up possibilities for the development of high-energy ZIHCs, and advancements in energy storage technology.
研究领域:
材料科学
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能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Zihan Chen,Yaohong Zhang,Zhi Li Teh,Jianfeng Yang,Lin Yuan,Gavin J. Conibeer,Robert J. Patterson,Qing Shen,Shujuan Huang,Zhilong Zhang
Quantum dots (QDs) have a wide range of applications in the field of optoelectronics. They have been playing multiple roles within the configuration of a device, by serving as the building blocks for both the active layer and the carrier transport layer. While the performance of various optoelectronic devices has been steadily improving via developments in passivating the QD active layer, the possible improvement via passivation of the QD-based carrier transport layer has been largely overlooked. Here, with lead sulfide QD photovoltaics as the platform of study, we demonstrate that the device performance can be significantly improved by passivating the QD hole transport layer (HTL) with zinc salt post-treatments. The power conversion efficiency is improved from 8.7% of the reference device to 10.2% and 9.5% for devices with zinc acetate (ZnAc)- and zinc iodide (ZnI2)-treated HTLs, respectively. Transient absorption spectroscopy confirms that both treatments effectively reduce band-tail states and increase carrier lifetime of the HTLs. Further elemental analysis shows that ZnAc provides a higher amount of Zn2+ for passivation while maintaining the function of HTL by allowing essential p-doping oxidation. In contrast, the additional I– passivation from ZnI2 inhibits p-doping oxidation and limits the function of HTL. This work demonstrates the potential of improving device performance by passivating the QD-based HTLs, and the method developed is likely applicable to other optoelectronic devices.
研究领域:
光电子学
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纳米材料
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光伏技术
·
半导体物理
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2024
·
IF 8.1
Shiwei Liu,Shiqiang Luo,Gehan A.J. Amaratunga,Pritesh Hiralal,Zanxiang Nie
Combining the strengths of supercapacitors and batteries onto a single device is a holy grail which would enable many applications to be covered by the same device. Here, we firstly develop a hybrid electrochemical device integrating chemical pathways of a zinc hybrid supercapacitor , an electrolytic MnO 2 -zinc battery and a zinc-iodide battery. The integrated hybrid devices demonstrate a capacity of 453.1 mAh/g (corresponding to an energy of 400.4 Wh/kg, based on weight of activated carbon) and a capacitance of 720.7 F/g at output power of 220.3 W/kg. The three different chemical pathways symbiotically work together, achieving improved cycling performance, shelf-life and Coulombic Efficiencies compared to any of its constituent systems individually.
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
产品关联
DOI
高影响因子
Catalysts
·
2024
·Vol. 14
·期 1
·41
·
IF 3.8
Huajun Wang,Jingjing Ma
A series of Zn salts were used as catalysts for the reaction of glycerol and urea to produce glycerol carbonate and it was found that ZnSO4showed the highest catalytic activity. Furthermore, the effects of reaction parameters on the glycerol conversion and glycerol carbonate yield were studied in detail. The results indicated that the glycerol conversion and glycerol carbonate yield were increased with the reaction temperature, reaction time, and catalyst amount while the optimal reaction conditions were 140 °C, 240 min, catalyst amount of 5 wt% (based on the glycerol weight), and urea-to-glycerol molar ratio of 1.1:1. During the reaction, the ZnSO4catalyst is transformed into Zn(NH3)2SO4at the initial stage of the reaction and then further transformed into Zn(C3H6O3). Zn(C3H6O3) and (NH4)2SO4may be the true active species for the activation of urea and glycerol, respectively. The reaction mechanism is proposed in this article. Based on the experimental results, a reaction kinetics model considering the change in volume of the reaction system was also established, and the model parameters were obtained by fitting the experimental data. The statistical results showed that the established kinetics model is accurate.Keywords:glycerol;urea;glycerol carbonate;zinc sulfate;reaction kinetics
研究领域:
化学工程
·
催化
·
有机化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Xiaobo Ding,Hailong Hu,Tailiang Guo,Fushan Li
InP quantum dots have received intensive attention due to their tunable emission wavelengths, narrow bandwidths, and high color purity. Nevertheless, InP quantum dots exhibit notable instability in a complex environment due to their highly oxidizable properties. In this study, we present a strategy for synthesizing InP@Al2O3 nanocomposites that have InP quantum dots evenly embedded in a hybrid substrate containing Al2O3 and coupling-interconnection layers of Si and Al. In addition, we used high-power UV irradiation to repair the defects generated during the synthesis process, leading to photoluminescence (PL) intensity increase of more than 10 times. InP@Al2O3 nanocomposites have demonstrated up to 9 h of laser stability, 30 days of water stability and acid stability and 20 days of alkali stability. It has far exceeded that of InP quantum dots and commercially available phosphors. Distal-type light-emitting diodes (LEDs) with stable and standard white emission can be realized by combining red and green InP@Al2O3 nanocomposites with blue LED chips.
研究领域:
材料科学
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光学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Minglong He,Junjie Shi,Anyu Zhang,Yuying Xu,Qing Wu,Li Wen,Qi Hong,Yang Yue,Siliang Wang
The plentiful and renewable nature of iodine confers metal-iodine batteries (MIBs) a benefit in the advancement of energy storage technology with high energy and power densities. However, dendrite growth and susceptibility to electrolyte corrosion not only result in low anode utilization but also severely affect battery stability. This paper introduces an ammonium-iodine batteries (AIBs) structure that leverages the inertness of organic materials to iodide ions, thereby avoiding the electrolyte corrosion issues commonly found in the metal anodes of traditional MIBs. Additionally, the use of a non-metallic anode eliminates the impact of dendrite growth on battery stability and increases the anode utilization rate. Because of these features, AIBs attain a high specific capacity of 242mAh g −1 and preserve an 80.7 % capacity retention rate following approximately 2000 cycles at a current density of 10 A g −1 . We have also developed micro batteries and pouch cells to verify the feasibility of the structure. This work provides an innovative strategy for iodine batteries energy storage system.
研究领域:
能源存储技术
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材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Peng Chen,Wenwen Wang,Ping Zhang,Yanyan Cui,Longfei Ruan,Xueling Chang
Lead halide perovskite nanocrystals (NCs) have become a promising emerging material with significant potential in the field of micro-optoelectronic devices for their excellent optical properties. However, their inherent poor stability and low carrier separation efficiency have seriously hindered their potential applications under certain circumstances. Constructing 3D/2D semiconductor heterostructures with comprehensive advantages offers an effective way to improve the performance of all inorganic lead halide perovskites. In this study, we synthesized a heterostructure nanomaterial about an island-like 3D CsPbBr3 NCs on 2D graphene nanosheets (GNS) using a chemical solution method with in situ controlled growth at room temperature. Using GNS as a substrate, we controlled the proportion of perovskite NCs and GNS, accurately regulated the area of isolated perovskite NCs on the surface of graphene, and regulated the photoelectric properties of the heterostructure nanomaterials. The carrier separation efficiency of the heterostructures was enhanced, and the optimal charge-transfer rate constant and energy-transfer efficiency were as high as 31.7 × 107 s–1 and 77.4% values, respectively. The 3D/2D perovskite/graphene heterostructures exhibited superior stability in polar solvents and at high temperatures. The heterostructure nanomaterials maintained good fluorescence stability at 160 °C and continue to emit even at 200 °C. Furthermore, the heterostructures also exhibited a steady photoelectric response, carrier transport, and cycle performance under similar extreme conditions, indicating broad applications for micro-optoelectronic devices.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYHEDRON
·
2024
·
IF 2.4
Zhengwei Wu,Jiawen Bao,Hongyang Zhang,Yingying Luo,Zhonglu You
Molecular nanoclusters comprising heterometallic Ni-Zn cores are an interesting class of compounds. In this paper, five novel Ni II -Zn II complexes [Ni 2 Zn 2 ClL 3 (HL) 3 ]·0·.25H 2 O ( 1 ), [Ni 2 Zn 2 BrL 3 (HL) 3 ]·0·.25H 2 O ( 2 ), [Ni 2 Zn 2 Br 2 L 2 (N 3 ) 2 (MeOH) 2 ]·2MeOH ( 3 ), [Ni 2 Zn 2 I 2 L 2 (N 3 ) 2 (MeOH) 2 ]·2MeOH ( 4 ), and [Ni 2 Zn 2 I 2 L 2 (N 3 ) 2 (DMF) 2 ] ( 5 ), were prepared from the Schiff base 2-(3-ethoxy-2-hydroxybenzylideneamino)-4-methylphenol (H 2 L). The complexes have been characterized by elemental analysis, IR, UV–Vis spectra. Molecular structures of the complexes have been determined by single crystal X-ray determination. In complexes 1 and 2 , three of the Schiff bases coordinate to the metal atoms via ether oxygen, imino nitrogen and two phenolate oxygen atoms, while the fourth one coordinates through ether oxygen, imino nitrogen and one phenolate oxygen atoms. In complexes 3 , 4 and 5 , all the donor atoms in the Schiff base ligands participate in coordination. The Ni and Zn atoms in the complexes are in octahedral and trigonal bipyramidal coordination, respectively. The anions of the metal salts and the azide anion, as well as methanol and DMF molecules furnish the coordination sphere. The compounds were evaluated for their antibacterial activities on Bacillus subtilis , Staphylococcus aureus , Escherichia coli and Pseudomonas fluorescens , and antifungal activities on Candida albicans and Aspergillus niger . Interestingly, the complexes have effective activities against Bacillus subtilis and Staphylococcus aureus .
研究领域:
无机化学
·
生物化学
·
药物化学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
·
IF 15.7
Li Shanlin,Chen Yingyu,Wang Zhen,Wang Mengmeng,Guo Xianglin,Tang Xueqing,Wang Xiaoyu,Lai Wende,Tong Meiyun,Wang Changhong,Cong Shan,Geng Fengxia,Chen Yong,Zhao Zhigang
Electrochromic materials were discovered in the 1960s when scientists observed reversible changes between the light and dark states in WO 3 thin films under different voltages. Since then, researchers have identified various electrochromic material systems, including transition metal oxides, polymer materials, and small molecules. However, the electrochromic phenomenon has rarely been observed in non-metallic elemental substances. Herein, we propose the development of non-metallic iodine electrodeposition-based electrochromic dynamic windows using a water-in-salt electrolyte containing iodine ions. The unique electrolyte environment and solvation structure of the water-in-salt electrolyte suppress the dissolution and shuttle effect of iodine, thereby achieving a different reaction pathway compared to traditional electrolytes. This pathway involves a reversible solid-liquid transition between solid iodine and solvated iodide ions. The iodine electrodeposition-based electrochromic dynamic window demonstrates a high optical contrast of 76.0% with near colour neutrality and excellent cycling stability. A practical 400 cm 2 complementary dynamic window is fabricated to demonstrate good electrochromic performance, including high optical contrast, a near colour-neutral opaque state, fast response time, uniform modulation, and polarity-switchable functionality.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Jianan Huang,Xianlin He,Ruqi Zhang,Zixuan Ding,Yanting Song,Haimei Yang
Accurate identification of multiple teas based on the difference in their contents and species of metal ions is vital in food inspection and public health. However, achieving accurate sensing from one material with various transduction signals and excellent anti-interference remains a challenge. Herein, a four-channel sensing platform was constructed by combining with four water-soluble InP/ZnS QDs with independent emission. The fluorescence intensities of the four water-soluble InP/ZnS QDs change in different degrees owing to the synergistic coordinative effect between metal ions and ligands. Interestingly, the multi-channel sensing platform allows the qualitative performance of metal ions with excellent anti-interference, high sensitivity, and high accuracy in binary and ternary mixtures. Moreover, the multi-channel fluorescent array exhibited a universality-powerful capability for identifying five teas with satisfactory results. The universal application for detecting Cr 6+ , Hg 2+ , and Cu 2+ in various tea drinks was demonstrated with excellent recovery, indicating a promising potential application in food safety.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）