JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Yu Deng,Zhengquan Xiao,Dajin Liu,Shilin Wu,Jiahang Zou,Zhipeng Jiang,Yongtao Li
Aqueous zinc-iodine batteries (AZIBs) are considered a very promising way to store energy. However, inherent issues such as cathodic slow I₂/I⁻ redox kinetics and anodic zinc (Zn) dendrite growth, limit the practical application of AZIBs. Here, we used just a trace amount of the electrolyte additive cesium iodide (CsI) for homogeneous deposition of Zn 2+ and enhanced cathode kinetics in AZIBs. The introduction of Cs + produces electrostatic shielding layers that regulate the homogenization of Zn 2+ deposition. Besides, I - promotes cathodic kinetics to achieve the effect of increasing the battery capacity. Electrochemical tests show that by adding 5 mM trace CsI to the Zn-Zn symmetric cell, the cycling time was increased to 650 h, and the Zn-Cu half-cell's cycling time was increased to 3000 cycles under conditions of 5 mA cm −2 . More importantly, Zn-I 2 cells can stably cycle for 10000 cycles at 1 A g −1 and 10 A g −1 . The average capacity increased to 97.54 mAh g −1 after 100 cycles at 1 A g −1 and 74.57 mAh g −1 after 100 cycles at 10 A g −1 . After 100 cycles, the Zn-I 2 full cell's capacity retention rose from 2.41 % to 57.47 % under the conditions of 1 A g −1 and a 5.6 N/P ratio.
研究领域:
电化学
·
能源材料
·
储能技术
·
无机化学
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Chong-Yang Cui,Cai-Xia Li,Wen-Wu Liu,Yu-Cheng Liu,Sheng-Tao Niu,Zhi-Qiang Xu,Rong Zou,Wen-Jun Niu,Mao-Cheng Liu,Ming-Jin Liu,Bingni Gu,Kun Zhao,Na Liu,Chun-Jung Lin,You-Zhi Wu,Yu-Lun Chueh
Thermodynamically induced tensile stress in the perovskite film will lead to the formation of atomic vacancies, seriously destroying the photovoltaic efficiency stability of the perovskite solar cells (PSCs). Among them, cations and halide anions vacancies are unavoidable; these point vacancies are considered to be a major source of the ionic migration and perovskite degradation at the crystal boundary and surface of the perovskite films. Here, we use choline bromide to modify the perovskite film by occupying the atomic defects in the CsPbBr3 perovskite film. The results show that the zwitterion quaternary ammonium ions and bromide ions in choline bromide can simultaneously occupy the Cs+ cation and Br– anions vacancies in the perovskite film by the ionic bonding effect, for which the defect-state density on the surface of the perovskite film can be significantly reduced, leading to the effective enhancement of carrier lifetime. In addition, the residual stress at the crystal boundary can be effectively reduced by lowering the Young’s modulus in the CsPbBr3 perovskite film. As a result, the optimized device achieves a photoelectric conversion efficiency (PCE) of 9.06% with an increase of 41.1% compared to the control device with a PCE of 6.42%. Most importantly, the newborn thermal stress due to thermal expansion during heat working conditions can be transferred from the polycrystalline perovskite to the carbon layer by the matched Young’s modulus, thus resulting in improved stability perovskite film under environmental conditions. The work provides new insights for preparing high-quality perovskite films with low defect-state density and residual stress.
研究领域:
材料科学
·
光伏技术
·
物理化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Ze Wang,Jiantuo Gan,Xiaodong Liu,Hangbo Shi,Qi Wei,Qiugui Zeng,Liang Qiao,Yonghao Zheng
All-inorganic cesium lead halide perovskites (CsPbX 3 , X = Cl, I, Br) have attracted great attention for developing high-performance photovoltaics due to their superb thermal stability. However, the short electron-hole diffusion lengths ( L D s) in CsPbI 2 Br perovskite are the primary limiting factor for further improvement of the power conversion efficiencies (PCEs) of the CsPbI 2 Br solar cells. Herein, a simple yet effective method is reported to prolong the L D s in CsPbI 2 Br via codoping of Zn 2+ and acetate (Ac − ) ions (i.e., using Zn(Ac) 2 as dopant). It is demonstrated that Zn 2+ partially replaces Pb 2+ to form a more stable black phase, and Ac − coordinates with Pb 2+ to passivate the defects at the perovskite grain boundaries which reduces electron-hole recombination within the perovskite. As a result, the L D s of Zn(Ac) 2 doped CsPbI 2 Br are greater than 1 μm, which is the first report on all-inorganic perovskites. The champion PCE of the CsPbI 2 Br solar cells is drastically increased from 12.31% to 14.93% upon doping with Zn(Ac) 2 , stemming mainly from the increased open-circuit voltage and fill factor. Furthermore, the non-encapsulated devices with Zn(Ac) 2 doped CsPbI 2 Br show less than 10% efficiency loss after storage in dry air for 30 days.
研究领域:
材料科学
·
光伏技术
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF PHYSICS-CONDENSED MATTER
·
2022
·Vol. 34
·期 30
·304002
·
IF 2.745
Xiaoqing Shi,Marko Kralj,Yang Zhang
The detection of drugs containing hydrochloric salt with conventional methods is time consuming and expensive. In this work, upon exposure to ciprofloxacin hydrochloride at different concentrations, the emission from CsPbBr3 NCs shifts to the blue from 513 nm to 442 nm. CsPbBr(3−x)Clx NCs are formed by the ion exchange and substitution of Br− and Cl− ions from surface to core of NCs. The first-principles calculations suggest that the substitution of Br− by Cl− ions plays a critical role in the tuning of the energy bandgap. The color of paper test strips changes immediately after exposure to different Ciproxan solutions. We propose that this rapid and portable method has a high potential application in other chloride salts for food safety.
研究领域:
分析化学
·
食品安全检测
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Fanju Zeng,Yuanyang Guo,Wei Hu,Yongqian Tan,Xiaomei Zhang,Jie Yang,Qiqi Lin,Yao Peng,Xiaosheng Tang,Zhengzheng Liu,Zhiqiang Yao,Juan Du
Metal halide perovskites have aroused extensive attention due to their excellent photoelectric properties . But the toxicity and instability of lead-based perovskite restrict their development severely. Recently, lead-free Cu-based perovskites have emerged as promising environmental friendly photoelectric materials on account of their low toxicity and equally excellent properties. Here, we report the highly uniform lead-free Cs 3 Cu 2 I 5 perovskite films with the long-term air-stability prepared by using methyl acetate as anti-solvent during the fabrication. The crystal structure, surface morphology , bandgap, and optical property of the Cs 3 Cu 2 I 5 perovskite films are investigated. Even though the Cs 3 Cu 2 I 5 perovskite films prepared with or without anti-solvent demonstrate the same crystal structure of the orthorhombic phase, by the anti-solvent approach, Cs 3 Cu 2 I 5 perovskite films exhibit an enhanced photoluminescence quantum efficiency (PLQY) from ~62% to ~76.0% and have a relatively smaller surface roughness ~17.5 nm. Most importantly, Cs 3 Cu 2 I 5 perovskite films exhibited long-term air-stability, and the PLQY could still reach 76.3% after storing for several months under an ambient atmosphere. All the results demonstrate the quality and the PLQY of Cs 3 Cu 2 I 5 perovskite films could be effectively improved by the anti-solvent assisted crystallization strategy, showing potential applications in the fabrication of photoelectric devices based on lead-free perovskites.
研究领域:
材料科学
·
光电材料
✓ 已验证
DOI
高影响因子
Nanoscale
·
2020
·Vol. 12
·期 11
·6522-6528
·
IF 6.895
Xuefeng Zhang,Long Gao,Min Zhao,Yanqin Miao,Zhiyuan Wang,Chengqiang Wang,Peizhi Liu,Bingshe Xu,Junjie Guo
Cesium lead halide perovskite nanocrystals (PNCs) have aroused tremendous research attention because of their excellent optoelectronic properties. Herein, we developed a facile and green low-temperature strategy free of organic solvents, in which only pure water was adopted as the solvent, to synthesize CsPbBr3 NCs. Intriguingly, although formed with the assistance of water, the obtained CsPbBr3 NCs present a cubic crystal structure, photoluminescence quantum yield (PLQY) of 75%, and narrow emission line width for bright green emission. Furthermore, both electroluminescence (EL) and photoluminescence (PL)-based light-emitting diodes (LEDs) present intrinsic green emission originating from the as-prepared CsPbBr3 NCs. Hence, this work offered a novel eco-friendly avenue for the preparation of perovskite NCs for their practical applications in LEDs.
研究领域:
材料科学
·
纳米技术
·
光电
✓ 已验证
DOI
高影响因子
Energy Advances
·
2024
·
IF 3.2
Ruliang Liu,Wenli Feng,Liangzhou Fang,Huiping Deng,Ling Lin,MinChang Chen,Jun-Xing Zhong,Wei Yin
Developing an artificial solid electrolyte interphase (SEI) with high Li ion flux is vital to improve the cycling stability of lithium metal batteries, especially under a high rate. In this work, a novel artificial SEI film was prepared via in situ deposition of a lithium-doped cesium lead chloride perovskite (Li–CsPbCl3). Benefiting from its ultra-high thickness (0.45 μm), high mechanical modulus (5.9 GPa), high lithium-ion migration number (0.57), and unique highly oriented framework, the Li–CsPbCl3 SEI film could promote the rapid transport and uniform deposition of lithium ions, enhancing the stability of lithium deposition and stripping. As a result, Li/Li symmetric cells based on the Li–CsPbCl3 protective film could cycle stably for 1300 hours under high current density of 10 mA cm−2. In addition, the Li/LiFePO4 battery using the Li–CsPbCl3 SEI film showed an impressive cycling stability with a capacity retention rate of up to 91.4% after 230 cycles at a high current rate of 3C.
研究领域:
材料科学
·
电化学
·
能源存储技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2013
·
IF 3.473
Hang Long,Pingxiao Wu,Nengwu Zhu
In this study, the adsorption performance of ethylamine-modified montmorillonite (Ethyl-Mt) and calcium-saturated montmorillonite (Ca-Mt) were evaluated by Cs + adsorption experiments considering the influencing factors (initial solution pH, contact time, initial Cs + concentration, temperature and ionic strength). FTIR, BET, SEM, EDS and Zeta potential analysis were used to characterize the surface properties of Ethyl-Mt and Ca-Mt. Experimental results demonstrated that the equilibrium uptake of Cs + was highly pH-dependent. Pseudo-second-order model fitted well with the adsorption kinetic studies. The adsorption processes were described by Langmuir model with maximum adsorption capacity of 60.03 mg g −1 and 80.27 mg g −1 for Ca-Mt and Ethyl-Mt, respectively. Also, the thermodynamic studies showed that the adsorption of Cs + was spontaneous and exothermic in nature. The presence of cations such as Na + , K + , Ca 2+ astricted the adsorption of Cs + . The Cs + removal on Ca-Mt was mainly ion exchange, while that on Ethyl-Mt would also involve coordination and surface complexation. On the basis of our results, Ethyl-Mt with high adsorption capacity and good surface characteristics is beneficial to be used for removal of Cs + .
研究领域:
环境化学
·
吸附科学
·
黏土矿物材料
·
放射性污染治理
·
水处理技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jingwei Zhu,Yu Liu,Benlin He,Wenyu Zhang,Lifang Cui,Sudong Wang,Haiyan Chen,Yanyan Duan,Qunwei Tang
The back interface issues including numerous defects and imperfect contact, mismatched energy level are regarded as the key detrimental factors causing serious charge recombination and energy loss ( E loss ) and inferior charge extraction to achieve high efficiency Hole transport materials-free (HTMs-free) carbon-based Perovskite solar cells (PSCs). To address this drawback, an effective interface engineering via depositing N, N'-Dicyclohexylcarbodiimide (DCC) at PVSK/Carbon back interface is creatively implemented to passivate CsPbBr 3 surface defects through forming interaction between N atoms with lone pair electrons and uncoordinated ions (eg Pb 2+ and Cs + ions) to suppress the defect states induced non-radiative recombination and E loss . Concurrently, the smoothness and valence band of PVSK film with DCC modification are increased to improve the contact and band alignment at back interface, respectively, remarkably accelerating hole extraction and transportation and also reducing E loss as well as charge recombination. As a result, the comprehensive performance of DCC interface modified HTMs-free carbon-based CsPbBr 3 PSCs is significantly enhanced, especially the champion efficiency boosts to 10.16% from 6.60% of the control PSC. Furthermore, owing to the enhanced hydrophobicity and decreased imperfections of PVSK film with DCC modification, the optimized device without any encapsulation displays an excellent long-term stability under 85% RH air condition at 85 °C over 1200 h.
研究领域:
材料科学
·
光伏技术
·
界面化学
✓ 已验证
DOI
高影响因子
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
·
2023
·Vol. 40
·期 8
·2300032
·
IF 2.7
Hao Jiang,Chenxi Zang,Yixiu Dong,Min Lai,Shuhong Xu,Jingkun Xu
CsPbX 3 (X = Cl, Br, I) nanocrystals (NCs) are competitive materials for a wide range of applications because of their outstanding optoelectronic properties. Ion doping has been demonstrated as one powerful method for improving the optical properties of CsPbX 3 NCs. However, the conventional ion-doping approaches are tedious, and generally performed under an inert atmosphere and high temperature. In this work, a one-step ultrasonic-assisted approach is demonstrated to prepare doped CsPbX 3 NCs. To demonstrate the universality of the ultrasonic-assisted ion-doping approach, three ion-doped perovskite NCs are prepared, which represent three common improvements effects of ion doping on perovskite NCs, namely improved stability, PL emission, and photoluminescence quantum yields (PLQYs) of perovskite NCs. Sr-doped CsPbI 3 NCs showed improved phase stability. Mn-doped CsPbCl 3 NCs showed dual-color emissions at 406 and 580 nm. The PLQYs of the as-prepared Ni-doped CsPbCl 3 NCs are greatly improved, from 10.1% to 71%. Such a simple and versatile ion-doping approach may promote the practical applications of all-inorganic perovskite NCs.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
无机化学
·
半导体材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Mengfeifei Jin,Weijie Zhou,Wenqiang Ma,Qin Wang,Xiaojuan Liang,Peiqing Zhang,Weidong Xiang
In the era of big data, the large amount of data generated every second requires modern and advanced data storage technologies. Femtosecond (fs) laser induced crystallization allow for the realization of fixed-point crystallization inside the CsPbBr 3 nanocrystals glasses (CPB), which can be applied in data storage. However, CPB is prone to self-crystallization prior to further heat treatment, interfering with fs-induced crystallization inside the glass and seriously hindering its application in data storage. Herein, we first propose the inhibition of CPB from self-crystallization by modulating the content of ZnO (4–20 mol%) using a melt-quenching method. ZnO was employed as a network modifier and was closely related to the glass network structure. When the content of ZnO was 4%, the CPB did not self-crystallize and was colorless. It was applied in the rewritable data storage by combining the 800 nm fs laser-induced crystallization, annealing (460 ℃/0.5 h) and fs laser erasing (20 mW). This work demonstrates a simple and efficient way to control the self-crystallization of CPBs, enhancing their potential practical application in high-capacity optical data storage with ultra-long working lifetimes.
研究领域:
材料科学
·
光学工程
·
信息存储技术
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Bo Gao,Hai-Rong Yu,Hui-Yao Zhang,Ting Liang,Chang-Jing Cheng
As the risk of radioactive waste generated in large quantities is emerging, rapid and selective removal and decontamination of cesium ions (Cs + ) from nuclear waste have become a significant issue for environmental protection and human health. Herein, a novel potassium copper hexacyanoferrate (KCuHCF)-embedded poly(acrylic acid)/laponite (PAAc/Lap-HCF) hydrogel has been developed by a facile and low-cost fabrication route for highly effective and selective Cs + adsorption. The diffusion-derived KCuHCF formation in the nanocomposite hydrogel via layer-by-layer (LBL) assembly can facilitate the preservation of the 3D-interconnected hydrogel structure and the dispersion of KCuHCF particles, which contribute to high-density immobilization of stable KCuHCF (~57.73 wt%) in the matrix. The adsorbent shows enhanced Cs + removal properties in terms of fast kinetics (>90% removal for 20 mg/L of Cs + within 1 h), stability (>115 mg/g in wide pH value of 2–11), high adsorption capacity (146.22 mg/g) and selectivity ( K d = 1.3 ×10 5 mL/g, 1 mg/L Cs + in highly competitive seawater). Such excellent characteristics with fast kinetics are mainly due to the high ion accessibility from the inherent nature of hydrogels and the highly loaded KCuHCF particles in the composites. The adsorption kinetics and isotherm obey the pseudo-second-order model and the dual-site Langmuir adsorption model, respectively. This nanocomposite hydrogel prepared in our work shows enhanced performance on removal of Cs + in aqueous solution, which has a good application prospect in treating radioactive wastewater .
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）