检索结果-南通市图书馆

Incorporation of Ionic Conductive Polymers into Sulfide Electrolyte-Based Solid-State Batteries to Enhance Electrochemical Stability and Cycle Life

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

ENERGY & ENVIRONMENTAL matERIALS 2024年第6期7卷 4-12页

作者： Kim, Juhyoung Choi, Woonghee Hwang, Seong-Ju Kim, Dong Wook Korea res Inst Chem technol KRICT Adv Mat Div Daejeon 34114 South Korea Yonsei Univ Dept Mat Sci & Engn Seoul 03722 South Korea Seoul Natl Univ Dept Mat Sci & Engn Seoul 08826 South Korea Univ Sci & technol UST Adv Mat & Chem Engn Daejeon 34113 South Korea

Sulfide-based inorganic solid electrolytes are promising materials for high-performance safe solid-state batteries. The high ion conductivity, mechanical characteristics, and good processability of sulfide-based inorganic solid electrolytes are desirable properties for realizing high-performance safe solid-state batteries by replacing conventional liquid electrolytes. However, the low chemical and electrochemical stability of sulfide-based inorganic solid electrolytes hinder the commercialization of sulfide-based safe solid-state batteries. Particularly, the instability of sulfide-based inorganic solid electrolytes is intensified in the cathode, comprising various materials. In this study, carbonate-based ionic conductive polymers are introduced to the cathode to protect cathode materials and suppress the reactivity of sulfide electrolytes. Several instruments, including electrochemical spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscopy, confirm the chemical and electrochemical stability of the polymer electrolytes in contact with sulfide-based inorganic solid electrolytes. Sulfide-based solid-state cells show stable electrochemical performance over 100 cycles when the ionic conductive polymers were applied to the cathode. This study develops electrochemically stable poly(propylene carbonate) (PPC) ionic conductive polymer as an alternative to the commonly used coating or buffer materials, including inorganic materials, polymeric rubbers, and PEO ionic conductive polymers. The ionic conductive polymer enhances the long-term cycle stability of sulfide-based solid-state batteries by protecting the cathode materials and compensating for the volume change during the repeated cycling. image

关键词： composite cathode electrochemical stability ionic conductive polymer solid-state battery sulfide solid electrolyte INTERPHASE FORmatION KINETICS CATHODES GROWTH

Accelerating the Screening of Modified MA2Z4 Catalysts for Hydrogen Evolution Reaction by Deep Learning-Based Local Geometric Analysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

ENERGY & ENVIRONMENTAL matERIALS 2024年第6期7卷 290-302页

作者： Zheng, Jingnan Wang, Shibin Deng, Shengwei Yao, Zihao Hu, Junhua Wang, Jianguo Zhejiang Univ technol Inst Ind Catalysis Coll Chem Engn State Key Lab Breeding Base Green Chem Synth Techn Hangzhou 310032 Peoples R China Zhengzhou Univ Sch Mat Sci & Engn Zhengzhou 450001 Peoples R China Zhengzhou Univ State Ctr Int Cooperat Designer Low Carbon & Envir Sch Mat Sci & Engn Zhengzhou 450001 Peoples R China

Machine learning (ML) integrated with density functional theory (DFT) calculations have recently been used to accelerate the design and discovery of single-atom catalysts (SACs) by establishing deep structure-activity relationships. The traditional ML models are always difficult to identify the structural differences among the single-atom systems with different modification methods, leading to the limitation of the potential application range. Aiming to the structural properties of several typical two-dimensional MA(2)Z(4)-based single-atom systems (bare MA(2)Z(4) and metal single-atom doped/supported MA(2)Z(4)), an improved crystal graph convolutional neural network (CGCNN) classification model was employed, instead of the traditional machine learning regression model, to address the challenge of incompatibility in the studied systems. The CGCNN model was optimized using crystal graph representation in which the geometric configuration was divided into active layer, surface layer, and bulk layer (ASB-GCNN). Through ML and DFT calculations, five potential single-atom hydrogen evolution reaction (HER) catalysts were screened from chemical space of 600 MA(2)Z(4)-based materials, especially V-1/HfSn2N4(S) with high stability and activity (Delta G(H*) is 0.06 eV). Further projected density of states (pDOS) analysis in combination with the wave function analysis of the SAC-H bond revealed that the SAC-dz(2) orbital coincided with the H-s orbital around the energy level of -2.50 eV, and orbital analysis confirmed the formation of sigma bonds. This study provides an efficient multistep screening design framework of metal single-atom catalyst for HER systems with similar two-dimensional supports but different geometric configurations.

关键词： graph convolutional neural network hydrogen evolution reaction modified MA(2)Z(4) substrate single atom catalyst MONOLAYER MACHINE

Novel photoactive material and fabrication techniques for solar cells application: nanocellulose-based graphene oxide CdS composite

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CLEAN ENERGY 2024年第2期8卷 189-216页

作者： Shoyiga, Hassan Oriyomi Akpasi, Stephen Okiemute Akpan, Joseph Amune, Ubani Oluwaseun Kiambi, Sammy Lewis North West Univ Chem Dept Mafikeng South Africa North West Univ Fac Nat & Agr Sci Mat Sci Innovat & Modelling MaSIM Res Focus Area Mafikeng Campus Mmabatho South Africa Durban Univ technol Chem Engn Dept Green Engn Res Grp Durban South Africa Durban Univ technol Ind Engn Dept Durban South Africa Edo State Univ Chem Engn Dept Uzairue Nigeria Vaal Univ technol Chem Engn Dept Vanderbijlpark South Africa

In recent times, solar energy has become one of the largest available sources of renewable energy at our disposal. However, the design of highly efficient solar cells is increasingly becoming crucial as there has been a surge for economically viable alternative energy sources with the lowest cost. Significant advances have been made through different routes to make photovoltaic (PV)/solar technologies economically viable, eco-friendly and consequently scalable. As a result, cellulose nanomaterials have become one of the emerging technologies in this regard because of the advantages of high-value bio-based nanostructured materials, such as their abundance and sustainability. Nanocellulose-based photoactive nanocomposite materials can be made by integrating conducting photoactive and electroconductive materials with hydrophilic biocompatible cellulose. Inorganic nanoparticles, such as graphene/reduced graphene oxide cadmium sulphide quantum dots, amongst others, can be introduced into the nanocellulose matrix and can be applied either as charge transporters or photoactive materials in different types of solar cells. Thus, in this review, we highlight the optoelectronic properties of different photoactive materials, particularly nanocellulose-based graphene nanocomposites; their efficiencies and drawbacks were X-rayed. The effect of doping each PV material on the PV performance is also discussed. It is anticipated that the novel material would result in a reduction in the cost of solar cells, jointly enhancing their efficacy in generating environmentally friendly electricity. Since the fabrication techniques and equipment play a crucial role in the development of solar cells, the fabrication techniques of bulk-heterojunction (BHJ) cells containing a nanocellulose-based graphene composite and case studies of already fabricated BHJ PV cells with nanocellulose-based graphene composite are discussed. The optoelectronic properties of different photoactive materials, particu

关键词： nanocellulose-based composite bulk heterojunction graphene composite photoactive materials fabrication techniques solar energy power conversion efficiency INTERNAL QUANTUM EFFICIENCY POLYMER PHOTOVOLTAIC CELLS OPEN-CIRCUIT VOLTAGE ONE-POT SEMICONDUCTING POLYMERS CONJUGATED POLYMERS EXCITON DIFFUSION FACILE SYNTHESIS green REDUCTION SMALL-MOLECULE

Constitutive model of viscoelastic dynamic damage for the material of gas obturator in modular-charge howitzer

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

DEFENCE technolOGY 2024年第9期39卷 203-216页

作者： Li, Zhonggang Chen, Longmiao Li, Yifan Jia, Yufeng Zhang, Quan Nanjing Univ Sci & technol Sch Mech Engn Nanjing 210094 Peoples R China Shanxi North Machine Bldg Co Ltd Technol Ctr Taiyuan 030009 Peoples R China Kelong New mat technol Co Ltd Res & Dev Dept Xianyang 712000 Peoples R China

In order to investigate the mechanical response behavior of the gas obturator of the breech mechanism, made of polychloroprene rubber (PCR), uniaxial compression experiments were carried out by using a universal testing machine and a split Hopkinson pressure bar (SHPB), obtaining stress-strain responses at different temperatures and strain rates. The results revealed that, in comparison to other polymers, the gas obturator material exhibited inconspicuous strain softening and hardening effects; meanwhile, the mechanical response was more affected by the strain rate than by temperature. Subsequently, a succinct viscoelastic damage constitutive model was developed based on the ZWT model, including ten undetermined parameters, formulated with incorporating three parallel components to capture the viscoelastic response at high strain rate and further enhanced by integrating a three-parameter Weibull function to describe the damage. Compared to the ZWT model, the modified model could effectively describe the mechanical response behavior of the gas obturator material at high strain rates. This research laid a theoretical foundation for further investigation into the influence of chamber sealing issues on artillery firing. (c) 2024 China Ordnance Society. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license (http://***/ licenses/by-nc-nd/4.0/).

关键词： Breech mechanism Gas obturator Polychloroprene rubber Constitutive model Strain rate Damage STRAIN RATES WIDE-RANGE POLYMERS BEHAVIOR PresSURE

Boosting Li-ion storage kinetics via constructing layered TiO2 anode

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

PARTICUOLOGY 2024年第10期93卷 22-29页

作者： Hou, Jiyue Wang, Fei Zhang, Enfeng Wang, Ying Dong, Peng Wang, Yunxiao Zhang, Yiyong Li, Xue Zhang, Yingjie Kunming Univ Sci & technol Fac Met & Energy Engn Natl & Local Joint Engn Res Ctr Lithium ion Batter Kunming 650093 Peoples R China Panzhihua Univ Coll Elect Informat Engn Panzhihua 617000 Peoples R China Univ Wollongong Australian Inst Innovat Mat Inst Superconducting & Elect Mat Innovat Campus Squires Way Wollongong NSW 2500 Australia

Due to the typical intercalation-deintercalation mechanism, TiO 2 holds great promise as a sustainable anode for next-generation lithium -ion batteries (LIBs). However, commercial TiO 2 (C-TiO 2 ) is granular and shows slow ionic conductivity, which greatly hinders its development due to sluggish kinetics, leading to low reversible capacity and inferior rate capability. In this study, a two-dimensional layered TiO 2 (L-TiO 2 ) anode is prepared via a one-step calcination process, which can effectively shorten the lithium ions diffusion path and improve its lithium ions conductivity. We elucidated the enhanced electrochemical performance of L-TiO 2 as an anode in LIBs through pseudocapacitive acceleration of lithium ions intercalation and deintercalation using various characterization techniques, including different scan rate cyclic voltammetry tests, in situ electrochemical impedance spectroscopy, in situ Raman spectroscopy, and in situ X-ray diffraction. In comparison to C-TiO 2 material, L-TiO 2 material showcases remarkable electrochemical performance, achieving a capacity of 166 mAh/g after 100 cycles at 0.1 C. Additionally, the lithium -ion diffusion coef ficient calculated for the L-TiO 2 is two orders of magnitude greater, underscoring its potential as a negative electrode material for LIBs. (c) 2024 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

关键词： Lithium-ion batteries Anode MXene LayeredTiO2 ELEctrOCHEMICAL PROPERTIES ANATASE TIO2 LITHIUM NANOPARTICLE PERFORMANCE

Organic X-Ray Image Sensors Using a Medium Bandgap Polymer Donor with Low Dark Current

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

ENERGY & ENVIRONMENTAL matERIALS 2024年第6期7卷 230-237页

作者： Ha, Jong-Woon Eom, Seung Hun Cha, Bo Kyung Song, Seyeong Eun, Hyeong Ju Kim, Jong H. Park, Jong Mok Kim, Bongsoo Park, Byoungwook Ko, Seo-Jin Yoon, Sung Cheol Lee, Changjin Jung, In Hwan Hwang, Do-Hoon Pusan Natl Univ Chem Inst Funct Mat Dept Chem Busan 46241 South Korea Korea res Inst Chem technol KRICT Div Adv Energy Mat Res Ctr Daejeon 34114 South Korea Korea Electrotechnol res Inst KERI Electromed Device Res Ctr Ansan 15588 South Korea Ulsan Natl Inst Sci & technol UNIST Grad Sch Carbon Neutral Sch Energy & Chem Engn Ulsan 44919 South Korea Ajou Univ Dept Mol Sci & Technol Suwon 16449 South Korea Korea res Inst Chem technol Res Ctr Adv Specialty Chem Ulsan 44412 South Korea Ulsan Natl Inst Sci & technol UNIST Dept Chem Ulsan 44919 South Korea Hanyang Univ Dept Organ & Nano Engn Human Tech Convergence Program 222 Wangsimni Ro Seoul 04763 South Korea

The development of portable X-ray detectors is necessary for diagnosing fractures in unconscious patients in emergency situations. However, this is quite challenging because of the heavy weight of the scintillator and silicon photodetectors. The weight and thickness of X-ray detectors can be reduced by replacing the silicon layer with an organic photodetectors. This study presents a novel bithienopyrroledione-based polymer donor that exhibits excellent photodetection properties even in a thick photoactive layer (similar to 700 nm), owing to the symmetric backbone and highly soluble molecular structure of bithienopyrroledione. The ability of bithienopyrroledione-based polymer donor to strongly suppress the dark current density (J(d) similar to 10(-10) A cm(-2)) at a negative bias (-2.0 V) while maintaining high responsivity (R = 0.29 A W-1) even at a thickness of 700 nm results in a maximum shot-noise-limited specific detectivity of D-sh* = 2.18 x 10(13) Jones in the organic photodetectors. Printed organic photodetectors are developed by slot-die coating for use in X-ray detectors, which exhibit D-sh* = 2.73 x 10(12) Jones with clear rising (0.26 s) and falling (0.29 s) response times upon X-ray irradiation. Detection reliability is also proven by linear response of the X-ray detector, and the X-ray detection limit is 3 mA.

关键词： low dark current low detection limit organic photodetector printable X-ray DETECTORS PHOTOCONDUCTORS SENSITIVITY

Particle size distribution in a multi-zone circulating fluidized bed polymerization reactor

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

PARTICUOLOGY 2024年第10期93卷 291-299页

作者： Hadadiyan, Mohammadhossein Mostou, Navid Marandi, Reza Univ Tehran Coll Engn Proc Design & Simulat Res Ctr Sch Chem Engn POB 11155-4563 Tehran Iran Natl Petrochem Co Petrochem Res & Technol Co Polymer Res Grp POB 14358-84711 Tehran Iran

This research focuses on modeling a multi-zone circulating reactor (MZCR) in the polypropylene production process. In these reactors, designed for polyolefin production, small catalyst particles (20-300 mm) initiate polymerization in the presence of monomer gas. The reactor consists of two main regions: the riser and the downer. The riser operates in the fast fluidization and the downer is in the moving bed regime. Employing the two-fluid model with the Eulerian-Eulerian approach, the dynamics of both solid and gas phases were modeled by applying Newton's laws of motion and assuming spherical particles. The population balance of particles within the reactor was also coupled with the equations of motion. The simultaneous solution of these equations provides valuable insights into particle and fluid behavior, revealing trends such as the growth of polymer particles. Furthermore, the impact of various operating conditions was explored. This study also examined the effects of design parameters (gas inlet velocity, average inlet diameter, and temperature) on the system performance. For instance, it was shown that in the case where the solid circulation flux is 30 kg/(m2 2 s) the velocity of particles in the bed increases from 0.4 at the inlet to 1.1 m/s in the fully developed zone, when it is 43 kg/(m2 2 s) the velocity of particles increases from 0.3 to 1.4 m/s, and when it is 55 kg/(m2 2 s), it is increased from 0.22 to 1.5 m/s. Additionally, trends in particle size distribution based on temperature adjustments were revealed. This study showed that higher temperatures accelerate the polymerization reaction rate, promoting faster growth kinetics and the formation of larger particles. (c) 2024 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

关键词： Fluidization Polymerization Gas-solid flow Multi-zone circulating reactor (MZCR) CFD-PBM Two-fluid model GAS-PHASE POLYMERIZATION CFD SIMULATION 2-FLUID MODEL HYDRODYNAMICS FLOW DYNAMICS SOLIDS PBM

Enhanced Electrical Properties of Bi2-xSbxTe3 Nanoflake Thin Films Through Interface Engineering

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

ENERGY & ENVIRONMENTAL matERIALS 2024年第6期7卷 359-366页

作者： Wu, Xudong Ding, Junjie Cui, Wenjun Lin, Weixiao Xue, Zefan Yang, Zhi Liu, Jiahui Nie, Xiaolei Zhu, Wanting Van Tendeloo, Gustaaf Sang, Xiahan Wuhan Univ technol State Key Lab Adv Technol Mat Synth & Proc Wuhan 430070 Peoples R China Wuhan Univ technol NRC Nanostruct Res Ctr Wuhan 430070 Peoples R China Univ Antwerp EMAT Electron Microscopy Mat Sci Groenenborgerlaan 171 B-2023 Antwerp Belgium

The structure-property relationship at interfaces is difficult to probe for thermoelectric materials with a complex interfacial microstructure. Designing thermoelectric materials with a simple, structurally-uniform interface provides a facile way to understand how these interfaces influence the transport properties. Here, we synthesized Bi2-xSbxTe3 (x = 0, 0.1, 0.2, 0.4) nanoflakes using a hydrothermal method, and prepared Bi2-xSbxTe3 thin films with predominantly (0001) interfaces by stacking the nanoflakes through spin coating. The influence of the annealing temperature and Sb content on the (0001) interface structure was systematically investigated at atomic scale using aberration-corrected scanning transmission electron microscopy. Annealing and Sb doping facilitate atom diffusion and migration between adjacent nanoflakes along the (0001) interface. As such it enhances interfacial connectivity and improves the electrical transport properties. Interfac reactions create new interfaces that increase the scattering and the Seebeck coefficient. Due to the simultaneous optimization of electrical conductivity and Seebeck coefficient, the maximum power factor of the Bi1.8Sb0.2Te3 nanoflake films reaches 1.72 mW m(-1) K-2, which is 43% higher than that of a pure Bi2Te3 thin film.

关键词： Bi2Te3 nanoflakes interface engineering scanning transmission electron microscopy thermoelectric thin film HIGH-THERMOELEctrIC PERFORMANCE POWER-GENERATION 2D matERIALS GROWTH BISMUTH TELLURIDE NANOPLATELETS MECHANISMS NANOSHEETS MAGNETISM

resist Thermal Shock Through Viscoelastic Interface Encapsulation in Perovskite Solar Cells

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

ENERGY & ENVIRONMENTAL matERIALS 2024年第6期7卷 238-245页

作者： Ma, Sai Tang, Jiahong Yuan, Guizhou Zhang, Ying Wang, Yan Wu, Yuetong Zhu, Cheng Wang, Yimiao Wu, Shengfang Lu, Yue Chi, Shumeng Song, Tinglu Zhou, Huanping Sui, Manling Li, Yujing Chen, Qi Beijing Inst technol Sch Mat Sci & Engn Beijing Key Lab Construct Tailorable Adv Funct Mat MIIT Key Lab Low Dimens Quantum Struct & DevicesE Beijing 100081 Peoples R China Beijing Univ technol Coll Mat Sci & Engn Beijing Key Lab Microstruct & Properties Solids Beijing 100124 Peoples R China Jiangnan Univ Anal & Testing Ctr Wuxi 214122 Peoples R China Peking Univ Sch Mat Sci & Engn Beijing 100871 Peoples R China

Enhancing the lifetime of perovskite solar cells (PSCs) is one of the essential challenges for their industrialization. Although the external encapsulation protects the perovskite device from the erosion of moisture and oxygen under various harsh conditions. However, the perovskite devices still undergo static and dynamic thermal stress during thermal and thermal cycling aging, respectively, resulting in irreversible damage to the morphology, component, and phase of stacked materials. Herein, the viscoelastic polymer polyvinyl butyral (PVB) material is designed onto the surface of perovskite films to form flexible interface encapsulation. After PVB interface encapsulation, the surface modulus of perovskite films decreases by nearly 50%, and the interface stress range under the dynamic temperature field (-40 to 85 degrees C) drops from -42.5 to 64.8 MPa to -14.8 to 5.0 MPa. Besides, PVB forms chemical interactions with FA+ cations and Pb2+, and the macroscopic residual stress is regulated and defects are reduced of the PVB encapsulated perovskite film. As a result, the optimized device's efficiency increases from 22.21% to 23.11%. Additionally, after 1500 h of thermal treatment (85 degrees C), 1000 h of damp heat test (85 degrees C & 85% RH), and 250 cycles of thermal cycling test (-40 to 85 degrees C), the devices maintain 92.6%, 85.8%, and 96.1% of their initial efficiencies, respectively. Viscoelastic PVB material is innovatively designed to form a flexible interface encapsulation. The Surface modulus and interface stress concentration zone are effectively alleviated. The stability breakthroughs in IEC 61215 (thermal treatment at 85 degrees C, damp heat test (85 degrees C & 85% RH), thermal cycling test (-40 to 85 degrees C)) has achieved through the systemic encapsulation by combining internal and external encapsulation. image

关键词： device stability perovskite solar cells stress field surface modulus thermal shock STABILITY