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16.48% Efficient solution-processed CIGS solar cells with crystal growth and defects engineering enabled by Ag doping strategy

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Journal of Energy Chemistry 2025年第1期100卷 59-65页

作者： Mengyu Xu Shaocong Yan Ting Liang Jia Jia Shengjie Yuan Dongxing Kou Zhengji Zhou Wenhui Zhou Yafang Qi Yuena Meng Litao Han Sixin Wu Key Laboratory for Special Functional Materials of MOE National&Local Joint Engineering Research Centre for High-efficiency Display and Lighting TechnologySchool of Nanoscience and Materials EngineeringHenan UniversityKaifeng 475004HenanChina

Solution-processed Cu(In,Ga)Se_(2)(CIGS) solar cells suffer from serious carrier recombination and power conversion efficiency(PCE) loss because of the poor film properties and easy formation of ***, we propose Ag&Se co-selenization strategy to enhance the crystallization and passivate harmful defects of the CIGS films. The formation of Ag-Se phase during the selenization process enables the formation of large grains and suppresses the deep level defects. It is found that Ag doping can enlarge the depletion region width, lower the Urbach energy and prolong the carrier lifetime. As a result, a champion solution-processed CIGS solar cell presents a high efficiency of 16.48% with the highly improved opencircuit voltage(VOC) of 662 m V and fill factor(FF) of 75.8%. This work provides an efficient strategy to prepare high quality solution-processed CIGS films for high-performance CIGS solar cells.

关键词： CIGS solarcells Solution-processedmethod Ag doping Crystal growth Defects engineering

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Improving structure stability of single-crystalline Ni-rich cathode at high voltage by element gradient doping and interfacial modifcation

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Journal of Energy Chemistry 2025年第2期101卷 630-640,I0013页

作者： Ruijuan Wang Yixu Zhang Zhi Li Lei Wu Jiarui Chen Xiaolin Liu Hui Hu Hao Ding Shuang Cao Qiliang Wei Xianyou Wang National Base for International Science&Technology Cooperation of New Energy Equipment Energy Storage Materials and DevicesNational Local Joint Engineering Laboratory for Key Materials of New Energy Storage BatteryHunan Province Key Laboratory of Electrochemical Energy Storage&ConversionSchool of ChemistryXiangtan UniversityXiangtan 411105HunanChina Institute of Micro/Nano Materials and Devices Ningbo University of TechnologyNingbo 315211ZhejiangChina

Single-crystalline Ni-rich cathodes can provide high energy density and capacity retention rates for lithium-ion batteries(LIBs).However,single-crystalline Ni-rich cathodes experience severe transition metal dissolution,irreversible phase transitions,and reduced structural stability during prolonged cycling at high voltage,which will significantly hinder their practical ***,a Li4TeO5surface coating along with bulk Te-gradient doping strategy is proposed and developed to solve these issues for single-crystalline Ni-rich LiNi_(0.90)Co_(0.05)Mn_(0.05)O_(2)cathode(LTeO-1.0).It has been found that the bulk Te^(6+)gradient doping can lead to the formation of robust Te-O bonds that effectively inhibit H_(2)-H3 phase transformations and reinforce the lattice framework,and the in-situ Li4TeO5coating layer can act as a protective layer that suppresses the parasitic reactions and grain ***,the modified material exhibits a higher Young's modulus,which will be conducive to maintaining significant structural and electrochemical stability under high-voltage conditions,Especially,the LTeO-1.0 electrode shows the improved Li^(+)diffusion kinetics and thermodynamic stability as well as high capacity retention of 95.83%and 82.12%after 200 cycles at the cut-off voltage of 4.3 and 4,5 ***,the efficacious dualmodification strategy will definitely contribute to enhancing the structural and electrochemical stability of single-crystalline Ni-rich cathodes and developing their application in LIBs.

关键词： Single-crystalline Ni-rich cathode High cut-off voltage Material fragmentation Li_(4)TeO_(5)coating layer Te^(6+)doping

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Dual-stage carbonization strategy for synthesizing biomass derived hard carbon with enhanced sodium-ion storage performances

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Journal of Industrial and engineering Chemistry 2025年 148卷 830-837页

作者： Tang, Yi Peng, Jiao Yang, Juan Liu, Peng He, Li Zhou, Kangjie Qiu, Wang Xie, Zheng Liu, Min Wang, Xianyou National Base for International Science & Technology Cooperation National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery Hunan Province Key Laboratory of Electrochemical Energy Storage & Conversion School of Chemistry Xiangtan University Hunan Xiangtan411105 China College of New Energy Ningbo University of Technology Zhejiang Ningbo315336 China

Hard carbon has become one of the most prominent anode materials for sodium ion batteries (SIBs) owing to its cost-effective and high capacity. High-temperature carbonization is the most common method for synthesizing biomass-derived hard carbon, and optimizing the carbonization temperature is considered an effective strategy for improving initial Coulombic efficiency (ICE) and discharge specific capacity. However, it is challenging how to obtain hard carbon materials that simultaneously exhibit high ICE and high specific capacity. In this work, the initial carbonization temperature is slightly higher than the pyrolysis temperature, and then followed by high-temperature carbonization process. This method effectively both reduces the specific surface area and enhances structural order, which is conductive to achieving higher ICE and capacity. As a result, it exhibits a maximum ICE of 92 % and a reversible capacity of 308 mAh g−1 when current density is 30 mA g−1. Furthermore, it also presents excellent cycling performance and maintaining 91.5 % of its capacity subsequent to 500 cycles when the current density is 300 mA g−1. Therefore, this straightforward and cost-effective method provides a meaningful attempt for the synthesis of other biomass-derived hard carbon as anode materials of SIBs. © 2025 The Korean Society of Industrial and engineering Chemistry

关键词： Carbon capture and utilization

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Synergistic Microchannel Design and Oxygen Functionalization Electrode for High-Performance Vanadium Redox Flow Batteries

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Energy and Fuels 2025年第19期39卷 9170-9179页

作者： Zhang, Tao Deng, Junhai Huang, Zhifeng Xu, Ye Deng, Huafeng Zhou, Yefeng Long, Peng Liu, Li Wang, Xianyou National Base for International Science & Technology Cooperation National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery Hunan Province Key Laboratory of Electrochemical Energy Storage and Conversion Key Laboratory of Environmentally Friend Chemistry and Applications of Ministry of Education School of Chemistry Xiangtan University Xiangtan411105 China National & Local United Engineering Research Centre for Chemical Process Simulation and Intensification Chemical Process Simulation and Optimization Engineering Research Center of Ministry of Education Xiangtan University Xiangtan411105 China KBC Corporation Ltd Yiyang413000 China

Vanadium redox flow batteries (VRFBs) show significant potential for grid-scale energy storage, yet face challenges due to sluggish electrode kinetics and inefficient electrolyte transport. To address these limitations, we present a dual-functional graphite felt (K-GF) electrode that synergistically integrates engineered microflow channels with oxygen-containing functional groups. The K-GF electrode is synthesized through a sustainable thermal and water vapor activation process using polyacrylonitrile (PAN) fibers, which eliminates toxic chemical treatments and minimizes water waste, thus aligning with green manufacturing principles. The engineered microflow channels enhance electrolyte dynamics, while the functional groups improve electrocatalytic activity, collaboratively addressing the existing limitations. Consequently, VRFBs equipped with K-GF electrodes demonstrate an energy efficiency of 85% at 100 mA cm-2 and a power density of 495 mW cm-2. Additionally, the battery operates consistently for 600 cycles at 300 mA cm-2 with an impressive energy efficiency of 72%. Computational fluid dynamics (CFD) simulations validate that the microflow channels optimize electrolyte dynamics, ensuring uniform reactant distribution and maximizing active-site utilization. Therefore, this work provides a transformative pathway for VRFBs in practical grid storage. © 2025 American Chemical Society.

关键词： Flow batteries

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Phase Evolution Extension of Cu₂ZnSn(S,Se)₄ Absorber Boosting the Efficiency of Kesterite Solar Cells to 14.99%

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ACS Energy Letters 2025年 2761-2769页

作者： Yao, Ge Wu, Zucheng Kou, Dongxing Kong, Bingyin Wei, Hao Shao, Zhipeng Zhou, Wenhui Zhou, Zhengji Yuan, Shengjie Qi, Yafang Han, Litao Cui, Guanglei Wu, Sixin Key Lab for Special Functional Materials Ministry of Education National & Local Joint Engineering Research Center for High-Efficiency Display and Lighting Technology School of Nanoscience and Materials Engineering Collaborative Innovation Center of Nano Functional Materials and Applications Henan University Kaifeng 475004 China State Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy Qingdao New Energy Shandong Laboratory Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Science Qingdao 266101 China

The presence of secondary phases and a high concentration of deep-level defects led to a large open-circuit voltage deficit (Voc,deficit) for Cu2ZnSn(S,Se)4 (CZTSSe) solar cells. Here we regulate the phase evolution f...

The presence of secondary phases and a high concentration of deep-level defects led to a large open-circuit voltage deficit (V_oc,deficit) for Cu₂ZnSn(S,Se)₄ (CZTSSe) solar cells. Here we regulate the phase evolution from CZTS to CZTSSe in the initial selenization stage to obtain high-quality absorber with minimal defects and secondary phases. By adding the bidentate chelation structured mercaptopropionic acid (MPA) into the air-prepared 2-methoxyethanol (MOE) precursor solution, large CZTS colloidal particles and dense precursor films are prepared. During the initial selenization stage, the reduced nucleation sites can decrease selenium-molecule interactions and extend the phase evolution process. This extension makes the heterogeneous nucleation more controllable, fostering uniform element distribution and enhanced growth of permeating the large-grain layer. These benefits demonstrate a substantial increase in device efficiency up to 14.99% (certified at 14.38%) with a reduced V_oc,deficit of 281.18 mV. The findings are of great significance for further efficiency leaps of kesterite solar cells. © 2025 American Chemical Society.

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Transition metal-based cathode catalysts for Li-CO_(2)batteries

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Journal of Energy Chemistry 2025年第5期104卷 225-253页

作者： Wenqing Ma Mingjuan Gao Jianping Ma Siyu Liu Lishan Yang Yahui Yang Xiangping Chen Tianzhen Jian Institute for Advanced Interdisciplinary Research(iAIR) Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of ShandongSchool of Chemistry and Chemical EngineeringUniversity of JinanJinan 250022ShandongChina Key Laboratory of Chemical Biology&Traditional Chinese Medicine Research(Ministry of Education of China) National and Local Joint Engineering Laboratory for New Petrochemical Materials and Fine Utilization of ResourcesKey Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan ProvinceKey Laboratory of Light Energy Conversion Materials of Hunan Province CollegeHunan Normal UniversityChangsha 410081HunanChina Nano-Science Center&Department of Chemistry University of CopenhagenCopenhagen 2100Denmark Jinan Preschool Education College Jinan 250307ShandongChina State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100ShandongChina Shandong Sacred Sun Power Sources Co.Ltd. Qufu 273100ShandongChina

The Li-CO_(2)battery has been highly rated as an intriguing technique for balancing the carbon cycle for years,but it is still significantly challenged by the obstacles such as limited reversibility,sluggish kinetics,and poor energy ***,the design and development of advance catalysts that can enhance the kinetics and reversibility of the CO_(2)electrochemical cycling reactions are considered the imperative *** metal-based catalysts are widely considered appealing owing to their unfilled dorbitals,rich and adjustable valences,as well as *** this review,the working mechanism and the key issues of the CO_(2)electrochemical cycling reaction are discussed *** the strategies for composition and structure design of different type of transition metal-based catalysts are highlighted,including their benefits,limitations,and the ways to implement these ***,based on the pioneering research,the perspectives on the challenges and key points for the future development of cathode catalyst are proposed.

关键词： Li-CO_(2)battery Transition metal Cathode catalyst Catalytic mechanism

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An Enclosed Encapsulation Strategy toward Stable Perovskite Quantum Dots: Structure, Lead Immobilization, and Backlight Display Applications

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Inorganic Chemistry 2025年 2025 May 15页

作者： Yu, Haoduo Liu, Yueliang Han, Dandan Wang, Xicheng Wang, Yuhua School of Materials and Energy Lanzhou University Lanzhou 730000 China National and Local Joint Engineering Laboratory for Optical Conversion Materials and Technology Key Laboratory for Special Function Materials and Structural Design the Ministry of the Education Lanzhou University Lanzhou 730000 China

Lead halide perovskite quantum dots have drawn great attention in the wide-color gamut display area. However, their poor stability restricts their practical application as well as the leakage of a toxic lead element. In this study, an enclosed encapsulation strategy is adopted to form CsPbBr₃ quantum dots embedded in the channels of molecular sieve SBA-15 with SiO₂ outer layer as enclosing protection (denoted as CsPbBr₃@SBA-15@SiO₂), which is achieved through a facile solid-state sintering method with post-treatment. The stability of perovskite quantum dots is enhanced remarkably, of which the emission intently after immersion in water for two months can remain over 95% of the initial value. Efficient lead leakage is achieved simultaneously. The improvement mechanisms were elucidated via the micro- and spectral viewpoints. A wide color gamut of 114% NTSC is demonstrated based on the obtained green emitter. This study could provide new insights into designing stable and environmentally sustainable perovskite quantum dots and promote their applications. © 2025 American Chemical Society.

关键词： Semiconductor quantum dots

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A terbium activated multicolour photoluminescent phosphor for luminescent anticounterfeiting

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Journal of Rare Earths 2020年第10期38卷 1039-1043,I0001页

作者： Jun Ma Yumiao Li Weishan Hu Wenxiang Wang Jiachi Zhang Jianhong Yang Yuhua Wang National&Local Joint Engineering Laboratory for Optical Conversion Materials and Technology Lanzhou UniversityLanzhou 730000China

The multicolor photoluminescence(PL) of a Tb3+singly activated NaYGeO4 phosphor is prepared by solid state *** the first time,it is reported that the PL color of Tb3+in NaYGeO4 phosphor can be tuned from green to blue and,finally,to red by controlling the Tb3+*** optimal tricolor phosphors are NaYGeO4:0.01 mol% Tb3+(red),NaYGeO4:0.5 mol% Tb3+(blue) and NaYGeO4:5 mol% Tb3+(green),*** PL properties of the NaYGeO4:Tb3+ phosphor were studied in *** results reveal that the PL color modulations of the NaYGeO4:Tb3+phosphor are essentially due to the cross-relaxation effect of Tb3+,and a possible mechanism on the cross-relaxation is *** to these unique features,a multicolor PL image was fabricated based on the NaYGeO4:Tb3+ phosphor for potential applications in luminescent anticounterfeiting.

关键词： Multicolour Luminescence Phosphor Rare earths

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Al-Cu-Li Co-doped P2-type Na0.5Mn0.95Ni0.05O2 microspheres as high-performance cathodes for sodium-ion batteries

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Journal of Energy Storage 2025年 125卷

作者： Ye, Zhongqiang Ren, Qiaochu Hu, Teli Huang, Zhifeng Hu, Hai Liu, Li National Base for International Science & Technology Cooperation National Local Joint Engineering Laboratory for Key materials of New Energy Storage Battery Hunan Province Key Laboratory of Electrochemical Energy Storage and Conversion School of Chemistry Xiangtan University Xiangtan411105 China

P2-type Na₀.₅Mn₀.₉₅Ni₀.₀₅O₂ (NMNO) is considered a promising candidate for use as a cathode material in sodium ion batteries because of its high theoretical specific capacity. However, it is limited by factors such as material conductivity, structural defects, and electrochemical reaction kinetics, resulting in a significant gap between the practical capacity and the theoretical value. Therefore, in this work, Al, Cu, and Li single-element doping, as well as Al-Cu-Li co-doping, were applied to NMNO via a solvothermal method to examine its impact on the crystal structure and electrochemical performance. The results demonstrate that the synergistic effect of Al-Cu-Li co-doping effectively facilitates Na+ insertion/extraction, enhances electronic conductivity, improves redox kinetics, mitigates electrode polarization, and suppresses the Jahn-Teller effect from Mn3+, thus significantly enhancing the specific capacity and cycling stability of the material. Within the voltage window of 2.0–4.0 V, AlCuLi-NMNO exhibits a specific capacity of 109.4 mAh g−1 after 100 cycles at 100 mA g−1, and maintains 75.5 mAh g−1 after 200 cycles at 1000 mA g−1, with capacity retention rates of 83.4 % and 90.5 %, respectively. Overall, this study presents a simple and efficient modification approach for improving the electrochemical performance of layered P2-type cathode materials used in sodium ion batteries. © 2025 Elsevier Ltd

关键词： Sodium-ion batteries

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Interface-driven D-band modulation for dual-function anchoring and catalytic conversion of polysulfides in lithium-sulfur batteries

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Journal of Energy Chemistry 2025年 107卷 919-928页

作者： Wenlong Xia Hengzhi Liu Hong Liu Qianqian Liang Lanhua Yi Manfang Chen Xianyou Wang Xingqiao Wu Hongbo Shu National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery Hunan Province Key Laboratory for Electrochemical Energy Storage and Conversion School of Chemistry Xiangtan University Xiangtan Hunan 411105 China Department of Chemistry Southern University of Science and Technology Shenzhen Guangdong 518055 China College of Chemistry and Materials Engineering Wenzhou University Wenzhou Zhejiang 325035 China

The polysulfide shuttle effect critically hinders lithium-sulfur (Li S) battery development, therefore, the design of heterogeneous interface engineering with “adsorption-catalysis” functions for polysulfide conversion has garnered considerable attention. However, the exploration of the intricate relationship between key electronic properties and catalytic activity at such interfaces remains a challenge. Additionally, a comprehensive understanding of the thermodynamic growth mechanisms for heterostructure materials is lacking. Herein, a Ni-based homologous structure was precisely constructed via thermodynamic control, with a specific focus on optimizing the interface design. The theoretical results show that the heterostructures with adjustable composition realize the appropriate upward shift to the D-band, improving the affinity towards polysulfide, and further reducing the reaction energy barrier. On this basis, the relationship between interface design and the D-band center, as well as catalytic performance, was established. Specifically, M-Ni 3 Fe/Ni 3 ZnC 0.7 accomplishes the electron enrichment at the interface, supporting the further diffusion of polysulfides, and lowering the Li S bond energy, performing the bidirectional catalytic transformation of polysulfides. As a result, the Li S batteries with the cathode of M-Ni 3 Fe/Ni 3 ZnC 0.7 /S deliver rate performances of discharge capacity of 514 mA h g −1 at 5.0 C. This understanding of the D-band and interfacial design provides a framework for Li S catalyst optimization.

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