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Enhancing micro-scale SiOx anode durability:Electro-mechanical strengthening of binder networks via anchoring carbon nanotubes with carboxymethyl cellulose

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Journal of Energy Chemistry 2025年第2期101卷 23-33页

作者： Chaeyeon Ha Jin Kyo Koo Jun Myoung Sheem Young-Jun Kim SKKU Advanced Institute of nano technology (SAINT) Sungkyunkwan University Department of nano Science and technology Sungkyunkwan University Advanced center for Convergence Energy Storage System Sungkyunkwan University SKKU Institute of Energy Science and technology (SIEST) Sungkyunkwan University

With the increasing prevalence of lithium-ion batteries（LIBs） applications,the demand for high-capacity next-generation materials has also *** currently considered a promising anode material due to its exceptionally high capacity for ***,the significant volumetric changes of SiOxduring cycling and its initial Coulombic efficiency（ICE） complicate its use,whether alone or in combination with graphite *** this study,a three-dimensional conductive binder network with high electronic conductivity and robust elasticity for graphite/SiOxblended anodes was proposed by chemically anchoring carbon nanotubes and carboxymethyl cellulose binders using tannic acid as a chemical *** addition,a dehydrogenation-based prelithiation strategy employing lithium hydride was utilized to enhance the ICE of *** combination of these two strategies increased the CE of SiOxfrom 74% to87% and effectively mitigated its volume expansion in the graphite/SiOxblended electrode,resulting in an efficient electron-conductive binder *** led to a remarkable capacity retention of 94% after30 cycles,even under challenging conditions,with a high capacity of 550 mA h g-1and a current density of 4 mA ***,to validate the feasibility of utilizing prelithiated SiOxanode materials and the conductive binder network in LIBs,a full cell incorporating these materials and a single-crystalline Ni-rich cathode was *** cell demonstrated a～27.3% increase in discharge capacity of the first cycle(～185.7 mA h g-1) and exhibited a cycling stability of 300 ***,this study reports a simple,feasible,and insightful method for designing high-performance LIB electrodes.

关键词： Lithium-ion batteries SiO x anode Blended anode Carbon nanotubes Carboxymethyl cellulose Conductive binder network

Highly efficient catalytic transfer hydrogenation for the conversion of nitrobenzene to aniline over PdO/TiO_(2):The key role of in situ switching from PdO to Pd

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Journal of Environmental Sciences 2025年第2期148卷 515-528页

作者： Anqi Lu Xiaokang Xiang Ming Lei Shuangshuang Huang Bingbing Liang Siyu Zhao Lihua Zhu Heqing Tang College of Resources and Environmental Science South-Central Minzu UniversityWuhan 430074China School of Chemistry and Chemical Engineering Huazhong University of Science and TechnologyWuhan 430074China School of Physics and technology Center for Electron MicroscopyMOE Key Laboratory of Artificial Micro-and Nano-Structuresand Institute for Advance StudiesWuhan UniversityWuhan 430072China

The reduction of nitrobenzene to aniline is very important for both pollution control and chemical ***,difficulties still remain in developing a catalytic system having high efficiency and selectivity for the production of ***,it was found that PdO nanoparticles highly dispersed on TiO_(2)support(PdO/TiO_(2))functioned as a highly efficient catalyst for the reduction of nitrobenzene in the presence of *** favorable conditions,95%of the added nitrobenzene(1 mmol/L)was reduced within 1 min with an ultra-low apparent activation energy of 10.8 kJ/mol by using 0.5%PdO/TiO_(2)as catalysts and 2 mmol/L of NaBH4 as reductants,and the selectivity to aniline even reached up to 98%.The active hydrogen specieswere perceived as dominant species during the hydrogenation of nitrobenzene by the results of isotope labeling experiments and ESR spectroscopic.A mechanismwas proposed as follows:PdO activates the nitro groups and leads to in-situ generation of Pd,and the generated Pd acts as the reduction sites to produce active hydrogen *** this catalytic system,nitrobenzene prefers to be adsorbed on the PdO nanoparticles of the PdO/TiO_(2)***,the addition of NaBH4 results in in-situ generation of a Pd/PdO/TiO_(2)composite from the PdO/TiO_(2)composite,and the Pd nanoclusters would activate NaBH4 to generate active hydrogen species to attack the adsorbed nitro *** work will open up a new approach for the catalytic transfer hydrogenation of nitrobenzene to aniline in green chemistry.

关键词： Catalytic transfer hydrogenation Reduction Pd Nitrobenzene Aniline

Improving performance of perovskite solar cells enabled by defects passivation and carrier transport dynamics regulation via organic additive

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Chinese Chemical Letters 2025年第2期36卷 551-556页

作者： Rongjun Zhao Tai Wu Yong Hua Yude Wang Department of Physics Center for Optoelectronics Engineering ResearchYunnan University Yunnan Key Laboratory for micro/nano Materials&technology International Joint Research Center for Optoelectronic and Energy MaterialsSchool of Materials and EnergyYunnan University Yunnan Key Laboratory of Carbon Neutrality and Green Low-carbon Technologies Yunnan University

Defects at the grain boundaries(GBs) of perovskite film highly restrict both the efficiency and stability of perovskite solar cells(PSCs). Herein, organic small molecules of butanedioic acid(BA) and acetylenedicarboxylic acid(AA), containing two carbonyl(C=O) groups and different core-units, were incorporated into perovskite as additives for PSCs application. Thanks to the strong coordination interaction between C=O group and under-coordinated Pb2+, the additives can effectively passivate film defects and regulate the perovskite crystallization, yielding high-quality perovskite films with lower defect densities. More importantly, the additives can efficiently regulate the charge transport behaviors in PSCs. Benefiting from the defects passivation and the regulation of charge carrier dynamics, the BA and AA-treaded PSCs show the power conversion efficiencies of 21.52% and 20.50%, which are higher than that of the control device(19.41%). Besides, the optimal devices exhibit a remarkable enhanced long-term stability and moisture tolerance compared to the pristine devices. Furthermore, the transient absorption spectrum reveals the mechanism of enhanced photovoltaic performances, attributing to the improvement of charge transport capability at the perovskite/Spiro-OMeTAD interfaces. This work affords a promising strategy to improve the efficiency and stability of PSCs through regulating the charge-carrier dynamic process in perovskite film.

关键词： Additives Carrier dynamics Defects passivation Perovskite solar cells Stability

Recent advances of cerium compounds in functional coatings:Principle,strategies and applications

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Journal of Rare Earths 2025年第2期43卷 227-245页

作者： Kai An Youqiang Wang Yi Sui Yongquan Qing Wei Tong Xuezhao Wang Changsheng Liu School of Mechanical and Automotive Engineering Qingdao University of Technology State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou Research Institute of Rare Earths School of Materials Science and Engineering Northeastern University center for nano and micro Mechanics Tsinghua University

Cerium(Ce) compounds have attracted considerable attention as key components in functional coatings due to their many outstanding *** work provides a comprehensive review of recent advances in the application of Ce in functional *** role of Ce in the improvement of functional properties such as corrosion-resistance,self-healing,superhydrophobicity,wear-resistance,and UV shielding is reviewed from the perspective of functional mechanism and applied ***,the strategies,processes,practical problems,and current challenges in the research of functional coatings containing Ce are summarized and *** objective is to highlight the great potential of Ce in functional coatings,and to explore new applications of Ce in the development of novel ***,this work aims to enhance the application value of Ce,solving the problem of unbalanced application of rare-earth elements.

关键词： Cerium Functional coatings Corrosion Superhydrophobicity UV resistance Rare earths

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Revealing the Role of Hydrogen in Highly Efficient Ag-Substituted CZTSSe Photovoltaic Devices:Photoelectric Properties Modulation and Defect Passivation

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nano-micro Letters 2025年第4期17卷 166-180页

作者： Xiaoyue Zhao Jingru Li Chenyang Hu Yafang Qi Zhengji Zhou Dongxing Kou Wenhui Zhou Shengjie Yuan Sixin Wu The Key Laboratory for Special Functional Materials of MOE School of Nanoscience and Materials EngineeringNational and Local Joint Engineering Research Center for High-Efficiency Display and Lighting TechnologyCollaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng 475004People’s Republic of China

The presence of SnZn-related defects in Cu_(2)ZnSn(S,Se)_(4)(CZTSSe)absorber results in large irreversible energy loss and extra irreversible electron-hole non-radiative recombination,thus hindering the efficiency enhancement of CZTSSe *** the incorporation of Ag in CZTSSe can effectively suppress the SnZn-related defects and significantly improve the resulting cell performance,an excellent efficiency has not been achieved to date primarily owing to the poor electrical-conductivity and the low carrier density of the CZTSSe film induced by Ag ***,this study exquisitely devises an Ag/H co-doping strategy in CZTSSe absorber via Ag substitution programs followed by hydrogen-plasma treatment procedure to suppress SnZn defects for achieving efficient CZTSSe ***-depth investigation results demonstrate that the incorporation of H in Ag-based CZTSSe absorber is expected to improve the poor electrical-conductivity and the low carrier density caused by Ag ***,the C=O and O-H functional groups induced by hydrogen incorporation,serving as an electron donor,can interact with under-coordinated cations in CZTSSe material,effectively passivating the SnZn-related ***,the incorporation of an appropriate amount of Ag/H in CZTSSe mitigates carrier non-radiative recombination,prolongs minority carrier lifetime,and thus yields a champion efficiency of 14.74%,showing its promising application in kesterite-based CZTSSe devices.

关键词： CZTSSe Ag/H co-doping Photoelectric properties modulation Defect passivation Non-radiative recombination

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A dry-electrode enabled ECG-on-Chip with arrhythmia-aware data transmission

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Science China(Information Sciences) 2025年第2期68卷 338-353页

作者： Xinzi XU Yanxing SUO Yang ZHAO Peiyi ZHOU Xiao HAN Qiao CAI Min WANG Jiajun YUAN Liebin ZHAO Yongfu LI Guoxing WANG Yong LIAN Department of micro-nano Electronics and MoE Key Lab of Artificial Intelligence Shanghai Jiao Tong University Pediatric AI Clinical Application and Research center Shanghai Engineering Research Center of Intelligence Pediatrics (SERCIP)Child Health Advocacy InstituteShanghai Children's Medical CenterSchool of MedicineShanghai Jiao Tong University Shanghai Engineering Research center of Intelligence Pediatrics (SERCIP) Xin Hua Hospital Affiliate to Shanghai Jiao Tong University School of Medicine

Early detection and treatment of cardiovascular diseases(CVDs) can be significantly enhanced through the use of flexible wearable electrocardiogram(ECG) sensors, potentially reducing CVD-related mortality. This paper introduces an ECG-on-Chip(EoC) solution tailored for flexible ECG sensors, incorporating novel features to address common challenges in wearable ECG technology. The EoC integrates a chopper-stabilized capacitively-coupled instrumentation amplifier(CS-CCIA),ensuring a high common-mode rejection ratio(CMRR) and low noise performance. Performance is further boosted via a positive feedback loop(PFL) and a programmable gain amplifier(PGA) with shared on-chip calibration logic, which enhances input impedance and minimizes gain variability to ensure consistent algorithm performance. Additionally, a secondary chopping technique is employed to further reduce noise, achieving an input-referred noise level of 454 nVrms. The embedded algorithm within the EoC is designed to extract clinically meaningful features, facilitating robust real-time arrhythmia analysis. Fabricated using a 0.18 μm CMOS process, the EoC consumes 14.9 μW with a supply voltage of 1.2 V. The algorithm's efficacy has been validated over 0.4 million heartbeats, demonstrating a sensitivity of over 99.7% for R-peak detection and 98.3% for arrhythmia analysis. To demonstrate practical application, the EoC has been integrated with a commercial Bluetooth low energy(BLE)transceiver, forming a wireless arrhythmia monitoring sensor equipped with dry electrodes. This system consumes 292.04 μW in arrhythmia-aware transmission mode, supporting 13 days of operation with a 30 mAh thin-film battery.

关键词： ECG flexible dry electrodes analog front-end abnormality detection ASIC wireless transmission

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Regulating crystallization and retarding oxidation in Sn-Pb perovskite via 1D cation engineering for high performance all-perovskite tandem solar cells

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Journal of Energy Chemistry 2025年第1期100卷 646-652页

作者： Ranran Liu Xin Zheng Zaiwei Wang Miaomiao Zeng Chunxiang Lan Shaomin Yang Shangzhi Li Awen Wang Min Li Jing Guo Xuefei Weng Yaoguang Rong Xiong Li Michael Grätzel center for Mesoscopic Solar Cells Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan 430074HubeiChina Institute of technology for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055GuangdongChina School of Chemistry Chemical Engineering and Life SciencesState Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of Technology430070HubeiChina Suzhou Institute of nano-Tech and nano-Bionics(SInano) Chinese Academy of SciencesSuzhou 215123JiangsuChina School of Physics and Optoelectronic Engineering Hainan UniversityHaikou 570228HainanChina

All-perovskite tandem solar cells have the potential to surpass the theoretical efficiency limit of single junction solar cells by reducing thermalization ***,the challenges encompass the oxidation of Sn^(2+)to Sn^(4+)and uncontrolled crystallization kinetics in Sn-Pb perovskites,leading to nonradiative recombination and compositional heterogeneity to decrease photovoltaic efficiency and operational ***,we introduced an ionic liquid additive,1-ethyl-3-methylimidazolium iodide (EMIMI) into Sn-Pb perovskite precursor to form low-dimensional Sn-rich/pure-Sn perovskites at grain boundaries,which mitigates oxidation of Sn^(2+)to Sn^(4+)and regulates the film-forming dynamics of Sn/Pb-based perovskite *** optimized single-junction Sn-Pb perovskite devices incorporating EMIMI achieved a high efficiency of 22.87%.Furthermore,combined with wide-bandgap perovskite sub-cells in tandem device,we demonstrate 2-terminal all-perovskite tandem solar cells with a power conversion efficiency of 28.34%,achieving improved operational stability.

关键词： All-perovskite tandem solar cells Sn-Pb perovskite 1D Regulated crystallization Antioxidation

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Output Consensus of Heterogeneous Linear MASs via Adaptive Event-Triggered Feedback Combination Control

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IEEE/CAA Journal of Automatica Sinica 2025年第1期12卷 285-287页

作者： Shuo Yuan Chengpu Yu Jian Sun the School of Automation Beijing Institute of Technology the Beijing Institute of technology Chongqing Innovation center

Dear Editor,This letter studies output consensus problem of heterogeneous linear multiagent systems over directed graphs. A novel adaptive dynamic event-triggered controller is presented based only on the feedback combination of the agent's own state and neighbors' output,which can achieve exponential output consensus through intermittent communication. The controller is obtained by solving two linear matrix equations, and Zeno behavior is excluded.

关键词： Directed graphs

Status analysis on sputtering and erosion evaluation methods of ion optic systems

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Chinese Journal of Aeronautics 2025年第1期38卷 254-270页

作者： Long MIAO Tongxun YANG Zhengxi ZHU Chang LU Zhiwen WU Ningfei WANG School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China Chongqing Innovation center Beijing Institute of TechnologyChongqing 404100China Advanced Aerospace Power and Energy Research center Beijing Institute of TechnologyZhuhai 519088China

In the past few decades,ion engines have been widely used in deep-space propulsion and satellite *** aim of extending the thruster lifetime is still one of the most important parts during the design stage of ion *** one of the core components of ion engine,the grid assembly of ion optic systems may experience long-term ion sputtering in extreme electro-thermal environments,which will eventually lead to its structural and electron-backstreaming *** this paper,the current studies of the grid assembly erosion process are systematically analyzed from the aspects of sputtering damage process of grid materials,numerical simulations,and measurements of erosion characteristics of grid *** advantages and disadvantages of various erosion prediction models are highlighted,and the key factors and processes affecting the prediction accuracy of grid assembly erosion patterns are *** different types of experimental methods of grid assembly erosion patterns are *** analysis in this paper is of great importance for selecting the sputter-resistant grid materials,as well as establishing the erosion models and measurement methods to accurately determine the erosion rate and failure modes of grid ***,the working conditions and structure parameters of ion optic systems could be optimized based on erosion models to promote the ion engine lifetime.

关键词： Electric propulsion Ion optic systems Sputtering yield Erosion characteristics Erosion pattern measurement Lifetime evaluation