Journal of Energy Chemistry
·
2022
·
IF 13.599
Tonghui Guo,Zhi Fang,Zequn Zhang,Zhiqiang Deng,Rui Zhao,Jing Zhang,Minghui Shang,Xiaohui Liu,Ziyang Hu,Yuejin Zhu,Liyuan Han
Inorganic NiO x based inverted structure perovskite solar cells (PSCs) is reported to be more stable than that with the organic hole transport materials. In this work, NiO x /MAPbI 3 interface chemical reaction induced instability of perovskite is unveiled: Ni 3+ and I − exhibit redox reactions and deprotonation of MA + happens, which result in interface defects and perovskite lattice deformation. Thus the defective interface accelerates the degradation of perovskite by defect pathways from the bottom interface to the perovskite surface contacting H 2 O/O 2 . Self-assembled interlayer of NH 2 − end silane on NiO x separates the reactive NiO x and MAPbI 3 , tunes the interface energy states by –NH 2 end group. As a result, the PSC based on the silane treated NiO x achieves enhanced PCE of 20.1% with decent stability under environmental and extreme conditions (high temperature, high humidity, light infiltration). Our work highlights the interface chemical problem induced PSC instability and a simple interface modification to achieve the stable PSCs.
研究领域:
材料科学
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能源技术
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化学工程
✓ 已验证
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2024
·
IF 2.9
Lei Guo,Lei Zhu,Yue Huang,Yan Tan,Alessandra Gilda Ritacca,Xingwen Zheng,Senlin Leng,Baoguo Wang
Alkaline Al-air batteries (AABs) are gaining increasing attention for large-scale energy storage systems due to their attractive intrinsic safety and cost-effectiveness. Nonetheless, future development of AABs is substantially hampered by water-induced self-corrosion processes on the Al anode. In this work, we introduce an amino acid derivative, namely Nα-Boc-N1-formyl-L-tryptophan (NBLT), into 4 M NaOH electrolyte to construct a unique layer that can effectively regulate the surface microstructure of Al anode. The findings of the experiments show that NBLT can be used as a reliable corrosion inhibitor. The effectiveness of the inhibitor increases with NBLT concentration, reaching a maximum of 73.9% at 1.5 mM. In comparison to the pristine condition, there is a significant increase in anode utilization from 31.8% to 82.9%, capacity density from 947.9 to 2469.1 mAh g−1, and energy density from 1261.6 to 3384.6 Wh kg−1. Theoretical calculations indicate that the carboxyl moieties present in the NBLT molecule establish coordination bonds with the Al atoms, thereby exerting a dominant role on the formation of the self-assembled barrier. The present investigation paves an effective strategy to inhibit reactions between anodes and electrolytes for advanced AABs.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2024
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IF 6.7
Jinlei Fan,Zhongchen Xu,Pan Qi,Cunlan Guo
Charge transport in molecular junctions provides an excellent way to investigate the response of molecules to intrinsic changes and external stimuli, exhibiting powerful potential for developing sensors. However, achieving multianalyte recognition remains a challenge. Herein, we innovatively developed an electrical array sensor based on peptide self-assembled layers for discriminating various heavy metal ions. Three peptide sequences were designed as sensing units with varying binding affinities for different metal ions. Electrical measurements demonstrated that different metal ions diversely affect the charge transport of peptide junctions. By using principal component analysis, a clear discrimination between the five kinds of heavy metal ions can be achieved. In the analysis of real samples, the array sensor showed a reliable anti-interference capability. The array sensor offers possibilities for large-area molecular junctions to construct functional molecular sensing devices.
研究领域:
生物化学
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传感技术
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 96
·78519-78525
·
IF 3.84
Lei Zhao,Xianglu Peng,Shenghong Yang,Yuan Zhang,Jing Wu,Xuan Wei,Fengyun Li,Qiaosheng Pu
Self-assemblies of polyelectrolytes have been widely used to tailor surface charges, but their stability varies significantly due to the diverse properties of both polyelectrolytes and surfaces. Fast and reliable evaluation of the stability of the assembled layers is essential to optimize the assembling processes and select the proper working conditions. In this work, the applicability of the pulsed streaming potential measurement for real-time evaluation of stability of assembled layers was demonstrated. Polyethyleneimine (PEI) with a molecular weight of 1800 was selected as the model polyelectrolyte and the results confirmed the dependence of the stability of the assembled layers on the assembling conditions. A parameter SR, which is defined as the relative zeta potential change rate, was adopted to reflect the difference of the positively charged layer. Effect of assembling conditions, including pH, polyelectrolyte concentration and contact time, on the change of the streaming potential were evaluated based on SR values. The feasibility of the technique for the evaluation of the stability of adsorbed proteins, oligonucleotides and cells onto the formed PEI layer was also investigated and its reliability was confirmed by capillary electrophoresis.
研究领域:
材料科学
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表面化学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
He Du,Quan Ji,Yacheng Xing,Xiaomei Ma,Yanzhi Xia
To promote the application extension of curdlan from food industry- dominant to advanced flexible biomaterials, a novel group of purely natural curdlan gels with noticeable performance was developed through a simple heating-cooling approach, i.e., heating the dispersion of pristine curdlan in mixed acidic natural deep eutectic solvents (NADESs) and water at 60–90 °C, and cooling at ambient temperature. The NADESs employed are composed of choline chloride and natural organic acids (lactic acid as the representative). The as-developed gels (called eutectohydrogels) are not only compressible and stretchable but conductive, which traditional curdlan hydrogels are not attainable. The compressive stress at 90 % strain exceeds 2.00 ± 0.03 MPa, the tensile strength and fracture elongation reach 0.131 ± 0.002 MPa and 300 ± 9 % respectively, attributed to the distinctive, reciprocally linked self-assembled layer-by-layer network structure formed during gelation . An electric conductivity up to 2.22 ± 0.04 S‧m −1 is achieved. The excellent mechanics and conductivity confer them good strain-sensing behavior. Additionally, the eutectohydrogels display high antibacterial activity against S. aureus (a model Gram-positive bacterium) and E. coli (a model Gram-negative bacterium). The outstanding comprehensive performance together with the purely natural attribute makes them broad application prospects in biomedical fields like flexible bioelectronics.
研究领域:
材料科学
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生物材料
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生物医学工程
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2025
·
IF 5.5
Hui Peng,Kaifa Dong,Xin Wang,Danyang Wang,Ying Tang,Yue Li,Guofu Ma,Ziqiang Lei
Comprehensive Summary Aqueous Zn ion capacitors (AZICs) have the features of low-cost, safety, sustainability and high energy density compared to other mainstream energy storage devices. However, the inevitable dendrite growth and side reactions severely limit the cycle life. Herein, the highly polar organic molecule triethylamine (TEA) is employed as a multifunctional electrolyte additive to enhance the stability of the Zn anode. The highly electronegative tertiary amine nitrogen within the TEA molecule preferentially coordinates with Zn ions (Zn 2+ ), reorganizing the solvated sheath structure and reconfiguring the hydrogen bonding network. In addition, theoretical calculations and experimental results show that TEA can effectively mitigate the parasitic reaction triggered by water activity by spontaneously adsorbing on the Zn surface to form a self-assembled interfacial shielding layer, which inhibits the construction of micro electric field and the evolution of Zn dendrites. The Zn//Zn cell based on ZnSO 4 +TEA electrolyte achieves 3,900 h of stable cycling at 2 mA·cm –2 , a more than 19-fold improvement over the ZnSO 4 electrolyte (less than 200 h). Moreover, AZIC assembled with the ZnSO 4 +TEA electrolyte maintains 80% capacity retention and nearly 100% Coulombic efficiency after 30,000 cycles at a high current density of 4 A·g –1 .
研究领域:
储能
·
电化学
·
材料科学
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化学工程
·
纳米技术
✓ 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）