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Recent progress in carbon-based materials boosting electrochemical water splitting

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Chinese Chemical Letters 2022年第8期33卷 3623-3631页

作者： ziqi zhang Yin Lei Weimin Huang College of Chemistry Jilin UniversityChangchun 130012China Key Laboratory of Physics and Technology for Advanced Batteries of Ministry of Education Jilin UniversityChangchun 130012China School of Pharmaceutical Sciences Jilin UniversityChangchun 130012China

As environmental crises such as global warming become more and more serious due to the large amount of carbon dioxide emitted by the burning of fossil fuels,much attention has been paid to carbon ***,with zero carbon content,is a clean and renewable energy carrier having a large energy *** is considered as one of the most desirable alternatives to fossil *** water splitting,unlike the steam reforming process accelerating fossil fuels depletion and CO_(2) emissions,can produce H_(2) powered by renewable energy such as solar or *** a promising way to promote carbon neutralization,hydrogen production by electrolysis of water is meaningful both in terms of scientific research and practical *** order to drive electrochemical water splitting with low power consumption,efficient,durable and affordable electrocatalysts with low overpotentials are in urgent ***,this mini-review briefly introduces the current development status and mainstream obstacles of carbon-based materials used in electrochemical water splitting.

关键词： Carbon-based materials Water splitting Electrocatalysis Carbon neutrality Hydrogen evolution reaction Oxygen evolution reaction

Crustal thicknesses and Poisson's ratios beneath the Chuxiong-Simao Basin in the Southeast Margin of the Tibetan Plateau

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Earth and Planetary Physics 2019年第1期3卷 69-84页

作者： ziqi zhang Yuan Gao Key Laboratory of Earthquake Prediction Institute of Earthquake ForecastingChina Earthquake Administration Institute of Earthquake Forecasting China Earthquake Administration

In the Southeast Margin of the Tibetan Plateau, low-velocity sedimentary layers that would significantly affect the accuracy of the H-κ stacking of receiver functions are widely *** this study, we use teleseismic waveform data of 475 events from 97 temporary broadband seismometers deployed by ChinArray Phase I to obtain crustal thicknesses and Poisson's ratios within the Chuxiong-Simao Basin and adjacent area, employing an improved method in which the receiver functions are processed through a resonance-removal filter, and the H-κ stacking is *** show that the crustal thickness ranges from 30 to 55 km in the study area, reaching its thickest value in the northwest and thinning toward southwest, southeast and *** apparent variation of crustal thickness around the Red River Fault supports the view of southeastern escape of the Tibetan *** thin crustal thickness in the zone between Chuxiong City and the Red River Fault indicates possible uplift of mantle in this *** positive correlation between crustal thickness and Poisson's ratio is likely to be related to lower crust *** of results obtained from different methods shows that the improved method used in our study can effectively remove the reverberation effect of sedimentary layers.

关键词： receiver functions sedimentary layer southeast margin of the Tibetan Plateau crustal thickness Poisson's ratio Chuxiong-Simao Basin

Pitch-derived 3D amorphous carbon encapsulated sulfur-rich cathode for aqueous Zn-S batteries

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Science China Chemistry 2023年第9期66卷 2711-2718页

作者： Kangning Wang Jianwei Wang ziqi zhang Wenlin zhang Feng Fu Yaping Du School of Chemistry&Chemical Engineering Yan’an UniversityYan’an 716000China Tianjin Key Lab for Rare Earth Materials and Applications Center for Rare Earth and Inorganic Functional MaterialsHaihe Laboratory of Sustainable Chemical TransformationsSmart Sensing Interdisciplinary Science CenterSchool of Materials Science and EngineeringNational Institute for Advanced MaterialsNankai UniversityTianjin 300350China

Rechargeable aqueous zinc batteries have attracted much attention due to their high security, plentiful zinc resources, and environmental friendliness. However, it can only offer limited specific capacity and energy density based on ion insertion chemistry cathode. Herein, we design a low-cost and high-energy density aqueous Zn-S battery where the conversion cathode was fabricated by pitch-derived three-dimensional(3D) amorphous carbon encapsulated industrial-grade sulfur powder. The cost of the chemical substances for this aqueous Zn-S battery might be reduced to $9.38 per kW h based on the affordable cost of the raw ingredients. It is found that the PAC/S-60.33% cathode reveals excellent electrochemical performance, including a high reversible capacity(633.5 mAh g^(-1)at 0.5 A g^(-1)), high energy density(297.5 Wh kg^(-1)), an excellent rate capability(204.5 mAh g^(-1) at 5.5 A g^(-1)), as well as good cycling stability(180 mAh g^(-1)after 400 cycles at 5.0 A g^(-1)). Besides, the reaction mechanism of the cathode was investigated using ex-situ X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), and transmission electron microscope(TEM). It was demonstrated that the cathode undergoes a conversion reaction between S and Zn S. Furthermore, the discoveries also offer prospective possibilities to fabricate more secure and inexpensive battery systems.

关键词： pitch 3D amorphous carbon sulfur-rich aqueous Zn-S batteries

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Situation Awareness and Sensitivity Analysis for Absorption of Grid-connected Renewable Energy Power Generation Integrating Robust Optimization and Radial Basis Function Neural Network

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Journal of Modern Power Systems and Clean Energy 2023年第6期11卷 1795-1803页

作者： ziqi zhang Zhong Chen Qi Zhao Yi Wang Jiang Tian School of Electrical Engineering Southeast UniversityNanjingChina Suzhou Power Supply Branch of the State Grid Jiangsu Electric Power Company SuzhouChina NARI Group Corporation Ltd. (State Grid Electric Power Research Institute Ltd.)NanjingChina

The significance of situation awareness(SA) in power systems has increased to enhance the utilization of gridconnected renewable energy power generation(REPG). This paper proposes a real-time calculation architecture based on the integration of robust optimization(RO) and artificial intelligence. First, the time-series simulation of the REPG consumption capacity is carried out under the current grid operating conditions. RO is employed in this simulation, given the randomness of the REPG output and the grid load. Then, the radial basis function neural network(RBFNN) is trained with the results under different parameters using the artificial fish swarm algorithm(AFSA), enabling the neural network(NN) to be the replacement for the time-series simulation model. The trained NN can quickly perceive the REPG absorption situation within the predefined grid structure and period. Moreover, the Sobol' method is adopted to conduct the global sensitivity analysis for different parameters based on the input-output samples obtained by the trained NN. Finally, the simulation experiments based on the modified IEEE 14-bus system prove the real-time performance and accuracy of the proposed SA architecture.

关键词： Renewable energy radial basis function neural network robust optimization sensitivity analysis situation awareness

Theoretical prediction and experimental realization of transition metal doped rutiles as diluted magnetic semiconductors

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Rare Metals 2006年第5期25卷 420-426页

作者： GU Yousong LI Jianmin ZHAN Xiaoyuan zhang Xiaomei FENG ziqi zhang Yue Department of Material Physics and Chemistry University of Science and Technology Beijing Beijing 100083 China

First principle calculations have been performed to study the electron structures and magnetic properties of transition metal doped ruilles in order to predict room temperature diluted magnetic semiconductors. Different doping configurailons have been calculated to find the preferred doping site. The ground state energies of both FM and AFM states have been calculated to study the magnetic coupling between the dopants. The calculation results show the Co doped mutile has a Curie temperature of 1438 K. Co doped mille films have been prepared on Si substrate by magnetron sputtering. X-ray diffraction results show that the deposited film is ruille. Hysteresis loop curves measured by vibration sample magnetization show that the film is ferromagnetic at root temperature.

关键词： diluted magnetic semiconductor titanium oxide fast principle calculation magnetron sputtering

Electrochemical synthesis of trimetallic nickel-iron-copper nanoparticles via potential-cycling for high current density anion exchange membrane water-splitting applications

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Journal of Energy Chemistry 2024年第2期89卷 535-542,I0012页

作者： ziqi zhang Sheng Wan Hanbo Wang Jinghan He Ruige zhang Yuhang Qi Haiyan Lu State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012JilinChina

Hydrogen is known for its elevated energy density and environmental compatibility and is a promising alternative to fossil *** water electrolysis utilizing renewable energy sources has emerged as a means to obtain high-purity ***,electrocatalysts used in the process are fabricated using conventional wet chemical synthesis methods,such as sol-gel,hydrothermal,or surfactantassisted approaches,which often necessitate intricate pretreatment procedures and are vulnerable to post-treatment ***,this study introduces a streamlined and environmentally conscious one-step potential-cycling approach to generate a highly efficient trimetallic nickel-iron-copper electrocatalyst in situ on nickel *** synthesized material exhibited remarkable performance,requiring a mere 476 mV to drive electrochemical water splitting at 100 mA cm^(-2)current density in alkaline ***,this material was integrated into an anion exchange membrane watersplitting device and achieved an exceptionally high current density of 1 A cm^(-2)at a low cell voltage of2.13 V,outperforming the noble-metal benchmark(2.51 V).Additionally,ex situ characterizations were employed to detect transformations in the active sites during the catalytic process,revealing the structural transformations and providing inspiration for further design of electrocatalysts.

关键词： Electrocatalytic water splitting Hydrogen evolution reaction Oxygen evolution reaction Electrochemical synthesis Anion exchange membrane

High performance room temperature all-solid-state Na-SexS battery with Na3SbS4-coated cathode via aqueous solution

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Journal of Energy Chemistry 2020年第9期29卷 250-258,I0008页

作者： ziqi zhang Haonan Cao Meng Yang Xinlin Yan Chuang Yu Di Liu Long zhang Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004HebeiChina Institute of Solid State Physics Vienna University of TechnologyVienna 1040Austria Department of Mechanical and Materials Engineering University of Western OntarioLondon N6A 3K7OntarioCanada

All-solid-state(ASS)Na-S batteries are promising for large-scale energy storage because of the incombustible solid electrolyte and avoiding the dissolution of ***,the poor contact between the active material and the solid electrolyte in the positive electrode leads to poor electrochemical ***,we report an aqueous solution approach to fabricate Na3SbS4-coated SexS-based active materials for a Na-S battery working at room *** with the Na3SbS4 and SexS mixed cathode,the coated cathode achieves significantly improved Na-ion diffusion kinetics and reduced impedance ***,the nanoparticle coating sustains the volume expansion of the cathode during *** resulting batteries deliver an intensively enhanced specific capacity at various *** of the mass loading,the Na3SbS4-coated cathode maintains a decent reversible capacity for the long-term discharge/charge *** best battery achieves an initial discharge capacity of509 mAh g^-1 at a current density of 437.4 mA g^-1 and capacity retention of 98.9%for 100 *** the best of our knowledge,this is one of the best room temperature ASS Na-S battery so *** work demonstrates that Na3SbS4 is very promising for the cathode coating purpose for ASS Na-S batteries.

关键词： Solid electrolyte Coating SPAN All-solid-state battery Room temperature Na-S battery

Parent-offspring and inter-offspring responses to conspecific versus heterospecific distress calls in 2 sympatric birds

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Current Zoology 2022年第6期68卷 700-707页

作者： Yuxin JIANG Jingru HAN ziqi zhang Xiangyang CHEN Canchao YANG Ministry of Education Key Laboratory for Ecology of Tropical Islands College of Life SciencesHainan Normal UniversityHaikou 571158China

Distress calls,as a type of alarm call,play important roles in expressing bodily condition and conveying information concerning predation *** this study,we examined the communication via distress calls in parent–offspring and inter-offspring ***,we used playback of chick distress calls of 2 sympatric breeders,the vinous-throated parrotbill Sinosuthora webbiana and the oriental reed warbler Acrocephalus orientalis,to the adults/chicks of these 2 species,respectively,and measured the responses of conspecifics or *** playback-to-chicks experiment showed that both species of chicks reduced the number of begging calls and begging duration time as a response to conspecific/heterospecific distress calls compared with natural begging and background noise ***,reed warbler chicks also reduced beak opening frequency in the response to conspecific distress calls compared with other playback ***,the results of the playback-to-adults experiment showed that reed warbler adults could eavesdrop on distress calls of conspecific neighbors and sympatric ***,the nest-leaving behavior of reed warblers did not differ significantly when they heard the distress calls of conspecifics or ***,reed warbler adults responded to heterospecific distress calls more quickly than to conspecific distress calls,and parrotbill adults presented the same *** results supported the warnkin hypothesis and show that chick distress calls play an important role in conveying risk and the condition of chicks to enhance individual *** addition,we also found that eavesdropping on distress calls is a congenital behavior that begins in the chick stage.

关键词： acoustic communication call recognition chick-chick system eavesdropping parent-offspring system

Identification of High-Risk Scenarios for Cascading Failures in New Energy Power Grids Based on Deep Embedding Clustering Algorithms

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Energy Engineering 2023年第11期120卷 2517-2529页

作者： Xueting Cheng ziqi zhang Yueshuang Bao Huiping Zheng State Grid Shanxi Electric Power Research Institute State Grid Shanxi Electric Power Co.Ltd.Taiyuan030001China School of Electrical and Electronic Engineering North China Electric Power UniversityBeijing102206China

At present,the proportion of new energy in the power grid is increasing,and the random fluctuations in power output increase the risk of cascading failures in the power *** this paper,we propose a method for identifying high-risk scenarios of interlocking faults in new energy power grids based on a deep embedding clustering(DEC)algorithm and apply it in a risk assessment of cascading failures in different operating scenarios for new energy power ***,considering the real-time operation status and system structure of new energy power grids,the scenario cascading failure risk indicator is *** on this indicator,the risk of cascading failure is calculated for the scenario set,the scenarios are clustered based on the DEC algorithm,and the scenarios with the highest indicators are selected as the significant risk scenario *** results of simulations with an example power grid show that our method can effectively identify scenarios with a high risk of cascading failures from a large number of scenarios.

关键词： New energy power system deep embedding clustering algorithms cascading failures