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A general synthetic strategy for N, P co-doped graphene supported metal-rich noble metal phosphides for hydrogen generation

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Green Energy & Environment 2024年第1期9卷 152-162页

作者： Jingwen Ma Xiang Li Guangyu Lei Jun Wang Juan Wang Jian Liu Ming Ke Yang Li chunwen sun School of Chemical and Environmental Engineering China University of Mining and Technology(Beijing)Beijing100083China State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing102249China Lab of Advanced Nano-structures&Transfer Processes Department of Chemical EngineeringTianjin UniversityTianjin300354China PetroChina Planning and Engineering Institute Beijing100083China

The exploitation of electrocatalysts with high activity and durability for HER is desirable for future energy systems,but it is still a *** have attracted increasing attentions,but the preparation process often needs toxic regents or dangerous reaction ***,we develop a general green method to fabricate metal-rich NMPs anchored on NPG through pyrolyzing DNA cross-linked *** obtained Ru_(2) P-NPG exhibits an ultrasmall overpotential of 7 mV at 10 mA cm^(2) and ultralow Tafel slope of 33 mV dec^(-1) in 1.0 mol L?1 KOH,even better than that of commercial Pt/*** addition,Ru 2 P-NPG also shows low overpotentials of 29 and 78 mV in 0.5 mol L^(-1) H_(2)SO_(4) and 1.0 mol L^(-1) PBS,*** superior activity can be attributed to the ultrafine dispersion of Ru 2 P nanoparticles for more accessible sites,more defects formed for abundant active sites,the two-dimensional plane structure for accelerated electron transfer and mass transport,as well as the regulation of electron distribution of the ***,the synthetic method can also be applied to prepare other metal-rich noble metal phosphides(Pd_(3)P-NPG and Rh_(2)P-NPG),which also exhibits high activity for *** work provides an effective strategy for designing NMP-based electrocatalysts.

关键词： Noble metal phosphides Electrocatalyst Deoxyribonucleic acid Hydrogen evolution pH universal

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碳基固体氧化物燃料电池研究进展

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洁净煤技术 2024年第1期30卷 239-264页

作者：张伟魏嘉璐 JOSE Antonio Alonso 孙春文中国矿业大学(北京)化学与环境工程学院北京100083 Instituto de Ciencia de los Materiales de Madrid CSICCantoblanco-Madrid 28049Spain

随着人们对绿色能源和环境友好型社会需求的日益增长,先进能量转换装置或系统的研发亟待加速,而燃料电池系统被认为是最有希望的未来发电装置。在不同种类的燃料电池中,固体氧化物燃料电池(SOFCs)是一种清洁环保的发电装置,因其独特的... 详细信息

随着人们对绿色能源和环境友好型社会需求的日益增长,先进能量转换装置或系统的研发亟待加速,而燃料电池系统被认为是最有希望的未来发电装置。在不同种类的燃料电池中,固体氧化物燃料电池(SOFCs)是一种清洁环保的发电装置,因其独特的多燃料运行能力及能量转化效率高等优点而前景广阔。然而,传统使用镍-金属陶瓷阳极的SOFCs,在碳氢化合物燃料下运行时,由于燃料的不完全氧化会使阳极产生积碳,从而导致电池性能下降。讨论了碳基SOFC中碳沉积机理和解决阳极积碳的策略,重点介绍了目前广泛研究的具有混合离子-电子导体的双金属-金属陶瓷材料的种类以及研究进展,并总结了双金属-金属陶瓷材料的抗积碳机理,主要表现为降低阳极表面的碳沉积速率以及加速积碳的去除。还介绍了在还原性气氛中,钙钛矿材料中纳米粒子原位偏析的原理,并讨论了原位偏析所形成的纳米颗粒以及其与钙钛矿主体所形成的金属氧化物异质结构在抗积碳阳极中的应用。此外,还探究了多层阳极和单原子催化剂阳极在中温SOFCs中的应用。在燃料电池技术巨大进步的推动下,人们对可用于固定式发电的集成煤气化的燃料电池发电系统(IGFCs)产生了新的兴趣,该系统对于实现煤炭的清洁高效利用具有重要意义,该技术的关键依托于SOFCs的成熟度。最后,总结并指出了碳基SOFCs未来的一些研究方向。

关键词：固体氧化物燃料电池阳极材料碳氢燃料碳沉积整体煤气化燃料电池

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Recent Progress in and Perspectives on Emerging Halide Superionic Conductors for All‑Solid‑State Batteries

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Electrochemical Energy Reviews 2023年第1期6卷 234-279页

作者： Kaiyong Tuo chunwen sun Shuqin Liu School of Chemical and Environmental Engineering China University of Mining&Technology(Beijing)Beijing 100083China 21C Innovation Laboratory Contemporary Amperex Technology Ltd.(21C LAB)Ningde 352100FujianChina

Rechargeable all-solid-state batteries(ASSBs)are considered to be the next generation of devices for electrochemical energy *** development of solid-state electrolytes(SSEs)is one of the most crucial subjects in the field of energy storage *** newly emerging halide SSEs have recently been intensively studied for application in ASSBs due to their favorable combination of high ionic conductivity,exceptional chemical and electrochemical stability,and superior mechanical *** this review,a critical overview of the development,synthesis,chemical stability and remaining challenges of halide SSEs is *** design strategies for optimizing the ionic conductivity of halide SSEs,such as element substitution and crystal structure design,are summarized in ***,the associated chemical stability issues in terms of solvent compatibility,humid air stability and corresponding degradation mechanisms are *** particular,advanced in situ/operando characterization techniques applied to halide-based ASSBs are *** addition,a comprehensive understanding of the interface issues,cost issues,and scalable processing challenges faced by halide-based ASSBs for practical application is ***,future perspectives on how to design high-performance electrode/electrolyte materials are given,which are instructive for guiding the development of halide-based ASSBs for energy conversion and storage.

关键词： Halide solid-state electrolytes Synthesis Ionic conductivity Chemical stability In situ/operando characterization All-solid-state batteries

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Elucidating the diffusion pathway of lithium ions in superionic halide solid electrolytes Li_(2+x)Hf_(1-x)In_(x)Cl_(6) for all-solid-state lithium-metal based batteries

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Journal of Energy Chemistry 2023年第12期87卷 12-23,I0002页

作者： Kaiyong Tuo Fusheng Yin Fanghui Mi chunwen sun School of Chemical&Environmental Engineering China University of Mining and Technology-BeijingBeijing 100083China

All-solid-state batteries(ASSBs) with inorganic solid-state-electrolytes(SSEs) have been regarded as the promising candidate for next-generation energy storage due to their high energy density and outstanding safety ***,the representative oxide and sulfide electrolytes suffer from low ionic conductivity and poor(electro)chemical stability,***,we report a series of new halide superionic conductors Li_(2+x)Hf_(1-x)In_(x)Cl_(6) with high ionic conductivity up to 1.05 mS cm^(-1) at 30 ℃ that are simultaneously stable to high *** means of the characterization techniques and bond-valence site energy(BVSE) calculation,insights into the effect of the phase transformation and underlying ionic transport mechanism by In substitution for Hf in Li_(2)HfCl_(6) are ***,with the increased amount of aliovalent substitution in Li_(2+x)Hf_(1-x)In_(x)Cl_(6) microcrystal framework,a gradual structure evolution from trigonal to monoclinic phase has been observed,which is accompanied by the redistribution of Li-ions to generate two dimensionally(2D) preferable diffusion pathways through octahedral-tetrahe dral-octahedral sites in In^(3+)-substituted Li_(2)HfCl_(6).Additionally,due to the oxidative stability of Insubstituted Li_(2)HfCl_(6),the bulk-type ASSBs with bare LiCoO_(2) deliver distinguished electrochemical performance.

关键词： Aliovalent substitution Halide electrolytes lonic conductivity All-solid-state batteries

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Recent Advances in Single-Atom Electrocatalysts for Oxygen Reduction Reaction

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Research 2020年第1期2020卷 1847-1897页

作者： Junxing Han Juanjuan Bian chunwen sun CAS Center for Excellence in Nanoscience Beijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China

Oxygen reduction reaction(ORR)plays significant roles in electrochemical energy storage and conversion systems as well as clean synthesis of fine ***,the ORR process shows sluggish kinetics and requires platinum-group noble metal catalysts to accelerate the *** high cost,rare reservation,and unsatisfied durability significantly impede large-scale commercialization of platinum-based ***-atom electrocatalysts(SAECs)featuring with well-defined structure,high intrinsic activity,and maximum atom efficiency have emerged as a novel field in electrocatalytic science since it is promising to substitute expensive platinum-group noble metal ***,finely fabricating SAECs with uniform and highly dense active sites,fully maximizing the utilization efficiency of active sites,and maintaining the atomically isolated sites as single-atom centers under harsh electrocatalytic conditions remain urgent *** this review,we summarized recent advances of SAECs in synthesis,characterization,oxygen reduction reaction(ORR)performance,and applications in ORR-related H_(2)O_(2)production,metal-air batteries,and low-temperature fuel *** progress on tailoring the coordination structure of isolated metal centers by doping other metals or ligands,enriching the concentration of single-atom sites by increasing metal loadings,and engineering the porosity and electronic structure of the support by optimizing the mass and electron transport are also ***,general strategies to synthesize SAECs with high metal loadings on practical scale are highlighted,the deep learning algorithm for rational design of SAECs is introduced,and theoretical understanding of active-site structures of SAECs is discussed as *** on future directions and remaining challenges of SAECs are presented.

关键词： platinum Oxygen centers

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A High-performance Lithium Metal Battery with a Multilayer Hybrid Electrolyte

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Energy & Environmental Materials 2023年第1期6卷 309-316页

作者： Qiang Yi Wenqiang Zhang Tianyuan Wang Junxing Han chunwen sun School of Chemical and Environmental Engineering China University of Mining&Technology(Beijing)Beijing 100083China CAS Center for Excellence in Nanoscience Beijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China

Solid-state batteries have been considered as a good choice for substituting traditional batteries with liquid electrolytes because of their high energy density and safe ***,a little amount of flammable non-aqueous liquid electrolyte or polymer electrolyte is usually required to improve the interfacial contact,which is adverse to ***,a nonflammable gel is prepared by hydrogen-bond interaction and applied as an interfacial layer to improve the performance of solid-state *** prepared multilayer hybrid electrolyte(MHE)composed of gel and CPE shows a wide electrochemical window(5.3 V vs Li/Li+),high ionic transference number(0.57),and ionic conductivity(7.18×10^(−4) S cm^(−1))at room ***,the assembled Li symmetric cell with MHE can cycle over 650 h at 0.5 mA cm^(−2) with a lower overpotential of~61 *** LiFePO_(4)|MHE|Li cell exhibits a higher discharge capacity of 107.8 mAh g−1 even cycled at 5 *** also shows superior capacity retention of 96.4%after 1000 cycles at 0.5 *** work provides a promising strategy for designing high-performance solid-state batteries.

关键词： Battery electrolyte performance

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A High-Performance Solid-State Na–CO_(2)Battery with Poly(Vinylidene Fluoride-co-Hexafluoropropylene)−Na_(3.2)Zr_(1.9)Mg_(0.1)Si_(2)PO_(12)Electrolyte

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Energy & Environmental Materials 2023年第3期6卷 87-95页

作者： Liang Lu chunwen sun Jian Hao Zelin Wang Sergio F.Mayer Maria Teresa Fernandez-Diıaz Jose Antonio Alonso Bingsuo Zou School of Chemical&Environmental Engineering China University of Mining and Technology-BeijingBeijing 100083China School of Physical Science and Technology Guangxi UniversityNanning 530004China State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering Ningxia UniversityYinchuan 750021China Instituto de Ciencia de los Materiales de Madrid CSICE-28049Cantoblanco-MadridSpain Institut Laue Langevin Grenoble F-38042France Guangxi Key Lab of Processing for Nonferrous Metals and Featured Materials and Key lab of new Processing Technology for Nonferrous Metals and Materials Ministry of EducationSchool of ResourcesEnvironments and MaterialsGuangxi UniversityNanning 530004China

The recovery and utilization of carbon dioxide(CO_(2))is the key to achieve the targets of peak carbon dioxide emissions and carbon *** Na-CO_(2)battery made with cheap alkali metal sodium and greenhouse gas CO_(2)is an effective strategy to consume CO_(2)and store clean renewable ***,the liquid electrolyte volatilization in the open battery system and inevitable dendrite growth restrict the application of Na-CO_(2)*** this work,magnesium-doped Na_(3)Zr_(2)Si_(2)PO_(12)(NZSP)was studied as a solid electrolyte for solid-state Na-CO_(2)*** ionic conductivity of Na_(3.2)Zr_(1.9)Mg_(0.1)Si_(2)PO_(12)reaches 1.16 mS cm^(−1)at room temperature by replacing Zr ions in Na_(3.2)Zr_(1.9)Mg_(0.1)Si_(2)PO_(12)with Mg ions,and the structural changes are analyzed by neutron powder *** composite electrolyte consisting of highly conductive Na_(3.2)Zr_(1.9)Mg_(0.1)Si_(2)PO_(12)and high processability poly(vinylidene fluoride-co-hexafluoropropylene)(PVDF-HFP)is utilized for the first time to assemble a solid-state Na-CO_(2)*** cell shows a full discharge capacity of 7720 mAh g^(−1)at 200 mA g^(−1).The middle gap voltage is lower than 2 V after 120 cycles at 200 mA g^(−1)and at a cut-off capacity of 500 mAh g^(−1).This work demonstrates a promising strategy to design high-performance solid-state Na-CO_(2)batteries.

关键词： cycling stability ion transport Mg-doped NZSP neutron powder diffraction solid-state Na-CO_(2)batteries

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Solid-state Li/Na Batteries and Self-powered Systems

Solid-state Li/Na Batteries and Self-powered Systems

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中国化学会第三届中国能源材料化学研讨会

作者： chunwen sun CAS Center for Excellence in Nanoscience Beijing Institute of Nanoenergy and NanosystemsChinese Academy of Sciences School of Nanoscience and Technology University of Chinese Academy of Sciences

＜正＞All-solid-state batteries contain nonflammable solid electrolytes that offer high safety compared to conventional SIBs with liquid ***-solid-state sodium batteries can increase cycle life,energy density and redu...

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锂离子电池的研究进展

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现代化工 1999年第6期19卷 12-14页

作者：孙春文天津大学应用化学系

介绍了锂离子电池的电化学反应原理、一般特性及电池正极材料、负极材料、电解质材料的研究进展，同时也介绍了目前存在的问题和发展前景。

关键词：锂离子电池进展电池材料

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基于XML的科学平台实验系统模型

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计算机工程 2001年第10期27卷 13-15页

作者：栗松涛李春文孙政顺清华大学自动化系北京100084

科学平台是一新型集成型网络知识载体,其提出是为了解决知识总量和信息总量爆炸性增长所带来的诸多问题。将可扩展标记语言引入科学平台这一高度集成的知识系统中,为科学平台系统建立了一个全新的技术模型,提供了进一步在网络知识库环... 详细信息

科学平台是一新型集成型网络知识载体,其提出是为了解决知识总量和信息总量爆炸性增长所带来的诸多问题。将可扩展标记语言引入科学平台这一高度集成的知识系统中,为科学平台系统建立了一个全新的技术模型,提供了进一步在网络知识库环境下开发科学平台系统的基本依据。

关键词：科学平台实验系统知识表示计算机网络科技知识

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