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CuS nanosheets as additives in the hole transport layers for stable p-i-n perovskite solar cells

NANO ENERGY 2025年 135卷

作者： Chen, Qiaoyun Asgarimoghaddam, Hatameh Ji, Wenxi Wu, Wenting Cao, Ji Wang, Rui Yu, Wei Nie, Xiaoting Zhou, Yi Song, Bo Musselman, Kevin P. Univ Waterloo Dept Mech & Mechatron Engn Waterloo ON N2L 3G1 Canada Univ Waterloo Waterloo Inst Nanotechnol Waterloo ON N2L 3G1 Canada Soochow Univ Coll Chem Chem Engn & Mat Sci Suzhou 215123 Peoples R China SINOPEC Beijing Res Inst Chem Ind Co Ltd Beijing 100013 Peoples R China Soochow Univ Coll Chem Chem Engn & Mat Sci Lab Adv Optoelect Mat Suzhou Key Lab Novel Semicond Mat & Devices Suzhou 215123 Peoples R China

Although poly[bis(4-phenyl) (2,4,6-trimethylphenyl) amine] (PTAA) is a widely used hole transport layer (HTL) in perovskite solar cells, its poor conductivity and the mismatched energy levels between PTAA and formamidinium-based perovskites increase interfacial carrier recombination and charge-transport resistance. To solve these problems, inorganic CuS nanosheets were synthesized and applied as additives in PTAA for the first time. After the addition of CuS, the conductivity of the HTL improves, and the energy levels are better aligned. In addition, perovskite growth is controlled through the interaction between CuS and PbI2, thus improving the quality of the perovskite films, which reduces nonradiative recombination. The addition of CuS into PTAA improved the power conversion efficiency from 21.99 % to 22.92 %. Moreover, both the thermal and humidity stability improved.

关键词： Perovskite solar cells Hole transport layer Copper sulfide Additive

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Chlorinated-Ti3C2TF as a dual-functional buried interface on SnO2 electron-transporting layers for 25.09% high-performance n-i-p perovskite solar cells

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ENERGY & ENVIRONMENTAL SCIENCE 2024年第10期17卷 3454-3469页

作者： Cao, Ji Chen, Qiaoyun Wu, Wenting Fu, Jianfei Zhang, Zelong Chen, Lei Wang, Rui Yu, Wei Wang, Lijie Nie, Xiaoting Zhang, Jing Zhou, Yi Song, Bo Li, Yongfang Soochow Univ Coll Chem Chem Engn & Mat Sci Suzhou 215123 Peoples R China Lab Adv Optoelect Mat Suzhou Key Lab Novel Semicond Optoelect Mat & Devi Suzhou Peoples R China NingboTech Univ Sch Mat Sci & Engn MSE Ningbo 315211 Peoples R China Changzhou Univ Natl Expt Demonstrat Ctr Mat Sci & Engn Sch Mat Sci & Engn Jiangsu Prov Cultivat Base State Key Lab Photovolt Changzhou 213164 Jiangsu Peoples R China Chinese Acad Sci Beijing Natl Lab Mol Sci CAS Key Lab Organ Solids Inst Chem Beijing 100190 Peoples R China

Fluorinated titanium carbide MXenes (Ti3C2TF) have been proven as interfacial materials for hole transport layers in perovskite solar cells (pero-SCs). The surface terminals of Ti3C2TF can be adjusted to regulate the work function (WF) of electron transport layers (ETLs). In this work, Ti3C2TF,OH,O was treated with HCl to obtain Cl-terminated Ti3C2TF (named Ti3C2TF,Cl). The resulting Ti3C2TF,Cl was employed as a buried interlayer between SnO2 and the perovskite, which provides the dual functions of reducing the WF of SnO2, leading to good ohmic contact between the ETL and the perovskite, and facilitating the growth of the perovskite and reducing lattice stress via alteration of the surface energy of the ETL and lattice matching with the perovskite. n-i-p pero-SCs based on FA(0.92)MA(0.08)PbI(3) achieved an excellent power conversion efficiency (PCE) of 25.09% with an open circuit voltage of 1.18 V. The optimized pero-SCs exhibit improved stability in N-2, light soaking conditions, and air with a relative humidity of 30-40%. Additionally, Ti3C2TF,Cl performs well in large-scale devices (1.1 cm(2)) with a PCE of 20.62%, and is adaptable to pero-SCs with different perovskite (FA0.85MA0.15PbI2.55Br0.45), which achieves an exceptional PCE of 24.05% and a high fill factor of 84.52%.

关键词： Perovskite

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Emerging natural clay-based materials for stable and dendrite-free lithium metal anodes:A review

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Chinese Chemical Letters 2025年第2期36卷 133-144页

作者： Haobo Wang Fei Wang Yong Liu Zhongxiu Liu Yingjie Miao Wanhong Zhang Guangxin Wang Jiangtao Ji Qiaobao Zhang School of Materials Science and Engineering Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal new Materials and Advanced Processing TechnologyHenan University of Science and TechnologyLuoyang 471023China Faculty of Engineering Huanghe Science and Technology UniversityZhengzhou 450063China Henan Key Laboratory of Non-Ferrous Materials Science&Processing Technology Henan University of Science and TechnologyLuoyang 471023China College of Agricultural Equipment Engineering Henan University of Science and TechnologyLuoyang 471023China State Key Laboratory of Physical Chemistry of Solid Surfaces College of MaterialsXiamen UniversityXiamen 361005China

Lithium metal is one of the most promising anodes for lithium batteries because of their high theoretical specific capacity and the low electrochemical ***,the commercialization of lithium metal anodes(LMAs)is facing significant obstacles,such as uncontrolled lithium dendrite growth and unstable solid electrolyte interface,leading to inferior Coulombic efficiency,unsatisfactory cycling stability and even serious safety *** low-cost natural clay-based materials(NCBMs)in LMAs is deemed as one of the most effective methods to solve aforementioned *** NCBMs have received considerable attention for stabilizing LMAs due to their unique structure,large specific surface areas,abundant surface groups,high mechanical strength,excellent thermal stability,and environmental *** the rapidly growing research enthusiasm for this topic in the last several years,here,we review the recent progress on the application of NCBMs in stable and dendrite-free *** different structures and modification methods of natural clays are first *** addition,the relationship between their modification methods and nano/microstructures,as well as their impact on the electrochemical properties of LMAs are systematically ***,the current challenges and opportunities for application of NCBMs in stable LMAs are also proposed to facilitate their further development.

关键词： Natural clay-based materials Aolid-state electrolyte Surface modification Li metal anodes Rechargeable batteries

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Theoretical prediction and validation of mechanical properties and damage of 3D orthogonal woven composites with different parameters

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COMPOSITES SCIENCE AND technology 2024年 252卷

作者： Yang, Xue Yao, Tian-lei Li, Dian-sen Jiang, Lei Beihang Univ Sch Chem Key Lab Bioinspired Smart Interfacial Sci & Techno Minist Educ Beijing 100191 Peoples R China Beijing Univ Chem Technol State Key Lab Organ Inorgan Composites Beijing 100029 Peoples R China

In this work, microscopic models of three-dimensional orthogonal woven composites (3DOWCs) were developed according to the actual structural relationships of yarns. By introducing a bridging model for 3DOWCs, elastic constants, tensile, compression, and shear strength of 3DOWCs with varying yarn densities were predicted and discussed by means of the established stress-strain relationships. Meanwhile, the flexural properties were also examined employing finite element models derived from the results of the bridging model predictions. The anticipated results exhibited excellent agreement with the reported experimental data. The results demonstrated that the elastic modulus ( E ), tensile, and compression strength, and the shear strength in the XY- and XZdirections increased with yarn densities, while the shear modulus ( G ) and YZ-direction shear strength decreased. In comparison to 3DOWCs with D T / D Z = 2 yarn/cm and D W = 1.5 yarn/cm (small densities), the E z , E x , and E y of 3DOWCs with D T / D Z = 4 yarn/cm and D W = 3 yarn/cm (large densities) were enhanced by 42.3%, 193.2%, and 174.1%, respectively. Meanwhile, the tensile and compression strength of 3DOWCs with large densities were also higher than those of 3DOWCs with small densities. Additionally, the variation in flexural strength was similar to that of tensile and compression strength, which increased by 41.1%. Large densities 3DOWCs with higher fiber contents experienced minor cracking during flexural loading because of their ability to maintain structural integrity, whereas stress concentration in the contact region with the indenter was the primary damage to small densities 3DOWCs.

关键词： A. Textile composites B. Strength C. Elastic properties C. Material modelling C. Finite element analysis (FEA)

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Flexible, transparent, and low-temperature usable electromagnetic shielding film based on orthogonally arranged silver nanowire network/ graphene oxide conductive network

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CHEMICAL PHYSICS LETTERS 2024年 857卷

作者： Wang, Yu-Xuan Ren, Jia-Yi Guo, Zhi-Jiang Li, Ning Liu, Xuan-Ji Hao, Long-Hui Deng, Wei Bai, Hao-Xuan Liang, Jian-Guo Chen, Zhan-Chun Taiyuan Univ Technol Coll Mech & Vehicle Engn Taiyuan 030024 Shanxi Peoples R China Beijing Univ Chem Technol Beijing 100029 Peoples R China

With the increasing diversification of application environments of new electronic products, demands are being placed on flexibility, transparency, and stable operation capability even under harsh conditions of electromagnetic shielding films. Aiming at the issue of high contact resistance of simple silver nanowire (AgNWs) conducting network, this work utilizes orthogonally arranged AgNWs and graphene oxide (GO) to establish unique AgNWs/GO conductive network, achieving more conductive nodes and enhancing the stability of the conductive network. The resulting AgNWs/GO film exhibits a reduced resistance of 9.8 Omega /sq, an impressive light transmittance of 85.7 % (lambda = 550 nm), and excellent electromagnetic interference shielding efficiency (EMI SE) reaching 30.3 dB in the X-band (8.2-12.4 GHz). Moreover, the AgNWs/GO film exhibits the potential for longterm operation in harsh environments. After undergoing numerous bending cycles (10,000 times), prolonged exposure (90 days), and repeated energization (800 times), the resistance of the AgNWs/GO film remains extremely stable. Furthermore, the film demonstrates remarkable electrothermal conversion capability in cold environments, rapidly heating to 73.3 degrees C under a 4 V voltage and maintaining stability thereafter. After 800 h of operation, there is negligible change in its electrothermal properties. The development of such a flexible electromagnetic shielding film holds significant implications for various applications.

关键词： AgNWs GO electromagnetic shielding Durability Electrothermal property

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Study on properties of MAO/PCL composite coating on ZK60 magnesium alloy

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INTERNATIONAL JOURNAL OF APPLIED CERAMIC technology 2025年第3期22卷

作者： Yang, Junwei Chen, Xiaowen Luo, Bin Tang, Song Xie, Wanlin Zhang, Defen Southwest Petr Univ State Key Lab Oil Gas Reservoir Geol & Exploitat Chengdu Sichuan Peoples R China Southwest Petr Univ Sch New Energy & Mat Chengdu 610500 Sichuan Peoples R China

Microarc oxidation technology enhances magnesium alloy surfaces but faces cracks and micropores. Adding C6H10CaO6 and Ca(OH)2 only partially solves this. This study used immersion pulling to create a microarc oxidation/polycaprolactone composite film, examining its properties and degradation. The film transitioned from smooth to porous with calcium and phosphorus deposits. After 56 days, the Ca/P ratio approached the ideal 1.67, matching the biological environment. The polycaprolactone layer thinned in corrosive media, with hydrogen bubbles and film detachment. Surface sediments included Ca2P2O7 and hydroxyapatite (HA), important for biocompatibility. Cell experiments showed superior adhesion and proliferation on the composite film compared to controls. A degradation model revealed the film's protective role during three stages. In summary, the composite film exhibits excellent surface morphology and composition, promotes cell growth, and protects the magnesium alloy substrate during degradation.

关键词： corrosion degradation microarc oxidation polycarbonate ZK60 magnesium alloy

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Microstructure and tribological behavior of Al-12Si-Nano graphene composite fabricated by laser metal deposition process

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JOURNAL OF MATERIALS RESEARCH AND technology-JMR&T 2023年 27卷 2311-2322页

作者： Yang, Zhilu Ma, Pan Zhang, Nan Yang, Dongye Gokuldoss, Prashanth Konda Jia, Yandong Shanghai Univ Engn Sci Sch Mat Sci & Engn Shanghai Peoples R China Harbin Inst Technol State Key Lab Adv Welding & Joining Harbin 150001 Peoples R China Tallinn Univ Technol Dept Mech & Ind Engn Ehitajate Tee 5 EE-19086 Tallinn Estonia Vellore Inst Technol Sch Mech Engn CBCMT Vellore 630014 Tamil Nadu India Shanghai Univ Inst Mat Lab Microstruct Shanghai 200444 Peoples R China

To improve the wear resistance of the Al-based alloys and extend its application spectrum, graphene nano-platelets (GNPs) reinforced Al-12Si matrix composites were fabricated by laser melting deposition (LMD) technology. The microstructure, wear morphologies and surface roughness were characterized by scanning electron microscopy (SEM), electron back-scattered diffraction (EBSD) setups and 3D confocal microscopy. The microhardness and high-speed reciprocating frictional properties both Al-12Si and GNPs/Al-12Si composites were evaluated. The addition of graphene significantly refines the microstructure and improves the wear resistance of the matrix. The formation of a relatively stable mechanically mixed layer (MML) reduces the contact area between the friction pair material and the wear surface, the wear rate and roughness of the Al-12Si - 0.5 wt% GNP reinforced composites decrease with the increase of sliding speed, and the wear mechanism changes from adhesive wear accompanied by abrasive wear to fatigue wear. Meanwhile, as the load increases, the wear rate and roughness increase. The wear mechanism of the composite changes from abrasive wear to a mixed mode (combination of both adhesive and abrasive). This research not only offers valuable information about the Al-Si-based composites but provides theoretical light on their industrial applications. (c) 2023 Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND

关键词： Nano graphene nano-platelets (GNPs) Al-12Si Laser melting deposition (LMD) Microstructure Wear resistance

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Ranked keyword Search Over Encrypted Cloud Data Through Machine Learning Method

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IEEE TRANSACTIONS ON SERVICES COMPUTING 2023年第1期16卷 525-536页

作者： Miao, Yinbin Zheng, Wei Jia, Xiaohua Liu, Ximeng Choo, Kim-Kwang Raymond Deng, Robert H. Xidian Univ Sch Cyber Engn Xian 710071 Peoples R China City Univ Hong Kong Hong Kong 999077 Peoples R China City Univ Hong Kong Dept Comp Sci Hong Kong 999077 Peoples R China Fuzhou Univ Coll Math & Comp Sci Key Lab Informat Secur Network Syst Fuzhou 350108 Peoples R China Univ Texas San Antonio Dept Informat Syst & Cyber Secur San Antonio TX 78249 USA Singapore Management Univ Sch Informat Syst Singapore 178902 Singapore

Ranked keyword search over encrypted data has been extensively studied in cloud computing as it enables data users to find the most relevant results quickly. However, existing ranked multi-keyword search solutions cannot achieve efficient ciphertext search and dynamic updates with forward security simultaneously. To solve the above problems, we first present a basic Machine Learning-based Ranked keyword Search (ML-RKS) scheme in the static setting by using the k-means clustering algorithm and a balanced binary tree. ML-RKS reduces the search complexity without sacrificing the search accuracy, but is still vulnerable to forward security threats when applied in the dynamic setting. Then, we propose an Enhanced ML-RKS (called ML-RKS$<^>{+}$+) scheme by introducing a permutation matrix. ML-RKS$<^>{+}$+ prevents cloud servers from making search queries over newly added files via previous tokens, thereby achieving forward security. The security analysis proves that our schemes protect the privacy of indexes, query tokens and keywords. Empirical experiments using the real-world dataset demonstrate that our schemes are efficient and feasible in practical applications.

关键词： Indexes keyword search Cryptography Security Binary trees Complexity theory Servers Ranked keyword search k-means clustering algorithm balanced binary tree permutation matrix forward security

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Experimental and numerical validation of high strain rate impact response and progressive damage of 3D orthogonal woven composites

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COMPOSITES SCIENCE AND technology 2024年 258卷

作者： Yang, Xue Li, Dian-sen Jia, Xiao-long Zuo, Hong-mei Jiang, Lei Lomov, Stepan V. Desplentere, Frederik Beihang Univ Sch Chem Minist Educ Key Lab Bioinspired Smart Interfacial Sci Technol Beijing 100191 Peoples R China Leuven KU Dept Mat Engn Leuven Belgium Beijing Univ Chem Technol State Key Lab Organ Inorgan Composites Beijing 100029 Peoples R China Anhui Polytech Univ Sch Text & Garment Adv Fiber Mat Engn Res Ctr Anhui Prov Wuhu 241000 Peoples R China

advanced three-dimensional (3D) woven composites for aerospace and automotive applications are commonly subjected to complex dynamic environments involving vibrations and impacts, resulting in examining their impact properties is extremely important. This paper first experimentally discussed the influences of strain rates, weft yarn densities and loading directions on the impact performances and failure mechanisms of 3D orthogonal woven composites (3DOWCs). Secondly, full-scale finite element models were developed to predict the stress distribution and interfacial damage evolution process. The predictions were well in agreement with the experimental results. This research revealed that the impact characteristics exhibited strain rate sensitivity. With increasing weft yarn densities, the high strain rate impact behaviors also improved. Particularly, the warp impact strength of 3DOWCs with a weft yarn density of 2 yarn/cm (W5-2) at 812 s(-1) was 17.4% and 24.0% higher than that of 3DOWCs with a weft yarn density of 1.5 yarn/cm (W5-1) at 822 s(-1). Meanwhile, warp impact strength consistently exceeded to that of the weft impact strength. Additionally, strain rates, weft yarn densities, and loading directions dramatically affected the stress distribution and interfacial damage evolution process of 3DOWCs. Significant warp yarns fracture and matrix cracking were the principal failure patterns in the warp impact, whereas the damage in the weft impact was dominated by localized fracture of weft yarns and interfacial debonding.

关键词： A. Textile composites B. Impact behaviour B. Stress/strain curves C. Damage mechanics C. Finite element analysis (FEA)

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Polynorepinephrine-regulated filler sulfonation toward interfacial reformation and conductive promotion of nanocomposite proton exchange membrane

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CHEMICAL engineering JOURNAL 2024年 484卷

作者： Huang, Tong Liu, Xin Ma, Ruibin Gao, Yangyang Xu, Xiaomin Yan, Chengrun Guo, Yuchen Li, Xiaoxu Qin, Yanzhou Liu, Lingling Xue, Jiandang Huang, Huadong Zhang, Xiyuan Yin, Xiaochun Zhai, Shaoxiong Zhao, Tianbao Chen, Jiechao Jia, Xiaoyang He, Shaojian Lin, Jun Zhang, Liqun Tianjin Univ Sch Mech Engn State Key Lab Engines Tianjin 300072 Peoples R China Sichuan Diwei Energy Technol Co Ltd Mianyang 621000 Peoples R China Nanjing Tech Univ Coll Chem Engn State Key Lab Mat Oriented Chem Engn Nanjing 211816 Peoples R China Chengdu Vehicle Environm Protect Technol Co Ltd Chengdu 610093 Peoples R China Beijing Univ Chem Technol State Key Lab Organ Inorgan Composites Beijing 100029 Peoples R China Zhejiang Univ State Key Lab Clean Energy Utilizat Hangzhou 310007 Peoples R China Sichuan Univ State Key Lab Polymer Mat Engn Chengdu 610065 Peoples R China Univ Tokyo Grad Sch Frontier Sci Chiba 2778561 Japan Hubei Univ Automot Technol Hubei key Lab Energy Storage & Power Battery Shiyan 442002 Peoples R China South China Univ Technol Guangdong Prov Key Lab Tech & Equipment Macromol A Guangzhou 510640 Peoples R China Beijing Inst Smart Energy Beijing 101499 Peoples R China Tsinghua Univ Key Lab Adv Mat Minist Educ Beijing 100084 Peoples R China Xihua Univ Sch Mat Sci & Engn Key Lab Mat & surface Technol Minist Educ Chengdu 610039 Peoples R China Dongguan Univ Technol Guangdong Prov Key Lab Distributed Energy Syst Dongguan 523808 Peoples R China North China Elect Power Univ State Key Lab Alternate Elect Power Syst Renewable Beijing 102206 Peoples R China

Interfacial compatibility between filler and matrix substantially affects the overall morphology and performance of nanocomposites. Compared with bare montmorillonite (MMT), surface modified product such as sulfonated MMT (SMMT) has been known to render optimized interfacial compatibility in composite proton exchange membranes (PEMs) for proton exchange membrane fuel cells (PEMFCs) and direct methanol fuel cells (DMFCs). Nevertheless, in-depth understanding and investigation on the sulfonation of MMT are seldom focused, such as uniformity and sufficiency. Herein, these broadly neglected issues are proposed and resolved using an exemplary polynorepinephrine (PNE)-regulated SMMT (SNMMT). Rather than direct sulfonation utilizing the inherent hydroxyl groups of MMT, a PNE coating with ample hydroxyl groups is deposited on MMT beforehand, which results in more homogeneous and sufficient sulfonation of SNMMT. Compared with normal SMMT, this alteration on surficial geography of filler functionalization brings significant benefits when composited with Nafion matrix, including harmonized filler-matrix compatibility, improved mechanical stability and enhanced proton conduction. Moreover, the antioxidative ability of PNE layer enables improved chemical stability of nanocomposite PEM. The Nafion/SNMMT composite PEM achieves 0.275 S cm-1 proton conductivity at 95 degrees C in water, evidently beyond any previously reported composite PEMs using normal SMMT. Equipped with this reformed nanocomposite PEM, both PEMFC and DMFC display competitive peak power densities (1.121 W cm-2 with H2/ O2 at 80 degrees C/100 % relative humidity (RH) for PEMFC, and 0.228 W cm-2 with 1.6 M methanol/100 % RH O2 for DMFC), and simultaneously show minor performance deteriorations in constant current density operation and RH cycle tests. It would be instructive the specific focus and reformation on the uniformity and sufficiency of filler modification may render significant interface and performance ad

关键词： Organic -inorganic nanocomposite Filler functionalization Interfacial compatibility Proton conduction Fuel cell

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