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Nano Research 2023年第7期16卷 8773-8781页

作者： Yue Du Wenxue Chen Lina Zhou Rui Hu Shizhu Wang Xueqing Li Yunlong Xie Lun Yang Yisi Liu Zhenhui Liu Institute for Advanced Materials Hubei Normal UniversityHuangshi 435002China College of Material Science and Engineering Jiangsu Key Laboratory of Materials and Technology for Energy ConversionNanjing University of Aeronautics and AstronauticsNanjing 210016China

Transition metal nitrides and carbides have attracted intensive attentions in metal-air battery application due to their metallic electron transport behavior and high chemical stability toward the oxygen reduction reaction(ORR).Herein,the polyoxometalate@polyaniline composite derived WN-W_(2)C heterostructured composite(WN-W_(2)C@pDC)has been fabricated through an in situ nitriding-carbonization strategy,with WN-W_(2)C nanoparticles implanted on N doped carbon nanorods.Asfabricated WN-W_(2)C@pDC demonstrates prominent electrocatalytic performance towards ORR and excellent cycling stability in metal-air battery,which possesses positive half-wave potential and large diffusion limiting current density(0.81 V and 5.8 mA·cm^(-2)).Moreover,it demonstrates high peak power density of 157.4 mW·cm^(-2)as Al-air primary cathode and excellent stability at the discharge-charge test(>500 h)of Zn-air secondary battery.The excellent activity and durability of WNW_(2)C@pDC catalyst should be attributed to the combined effect of intimate WN-W_(2)C heterointerfaces,unique embedded nanoparticles structure,and excellent electrical media of N doped carbon,confirmed by a series of contrast experiments.

关键词： WN-W_(2)C heterojunctions polyoxometalate@polyaniline composite oxygen reduction reaction metal-air battery

Encapsulation of Fe-CoP with P,N-co-doped porous carbon matrix as a multifunctional catalyst for wide electrochemical applications

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Journal of Energy Chemistry 2022年第8期31卷 36-44,I0002页

作者： Yuelong Xu Ran Wang Jingyue Wang Yaru Zhang Tifeng Jiao State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004HebeiChina Hebei Key Laboratory of Applied Chemistry School of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004HebeiChina Hebei Engineering Research Center for Water Saving in Industry Shijiazhuang 050081HebeiChina nstitute of Energy Resources Hebei Academy of SciencesShijiazhuang 050081HebeiChina

Hydrogen evolution reaction(HER),oxygen evolution reaction(OER),and oxygen reduction reaction(ORR)serve as the most promising electrochemical processes for renewable energy.Developing multifunctional electrocatalysts with high performance for HER,OER and ORR still remains a challenge.Herein,we report a facile method to prepare P,N-co-doped porous carbon encapsulated Fe-CoP(A-FeCoP/CPN)electrocatalyst through freeze drying,carbonization,and KOH activation.The acquired A-FeCoP/CPN possesses abundant pores with large surface area,which provides sufficient defect-rich sites for HER,OER,and ORR,in alkaline or acidic electrolytes.The A-Fe-CoP/CPN shows low overpotential and good stability for HER and OER in alkaline electrolyte.Density functional theory(DFT)computations reveal that the addition of Fe greatly facilitates the rate-determining step and overall catalytic pathway for both HER and OER.A-Fe-CoP/CPN also exhibits low half-wave potential(E1/2)for ORR,which indicates an enhanced performance than that of the noble Pt/C catalyst.Zn-air battery equipped with the A-Fe-CoP/CPN catalyst exhibits a high energy density(849 m Ah g^(-1))and a long-time stability at 5 m A cm^(-2).This finding not only offers a facile strategy to prepare porous carbon materials with defect-rich sites,but also provides guidance for developing multifunctional electrocatalysts for wide electrochemical reactions.

关键词： HER OER ORR Multifunctional electrocatalyst metal-air battery

Advanced noble-metal-free bifunctional electrocatalysts for metal-air batteries

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Journal of Materiomics 2022年第2期8卷 454-474页

作者： Wenhao Tang Boya Li Kewei Teng Xiaodong Wang Ruiping Liu Mengwei Wu Lei Zhang Pengfei Ren Junqing Zhang Ming Feng Department of Materials Science and Engineering China University of Mining&Technology(Beijing)Beijing100083China Department of Mechanical Engineering University of Alaska FairbanksPO Box 755905FairbanksAK99775-5905United States Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education Jilin Normal UniversityChangchun130103China

The sluggish reaction kinetics at the oxygen cathode is one of the important issues hindering the commercialization of the metal-air batteries.Although the noble metal can be used as the high-efficiency electrocatalyst to solve the problems to some extent,the high cost and scarcity of these noble-metal catalysts have limited their application in electrocatalysis.In this review,we discussed the mecha-nisms of the ORR and OER,and proposed the principles for the bifunctional electrocatalysts firstly,and then the state-of-the-art bifunctional catalysts,including carbon-based materials and transition-metal-based materials.On the basis of that,the self-supporting 3D noble-metal-free bifunctional ORR/OER catalysts were also discussed.Finally,the perspectives for the bifunctional electrocatalysts were discussed.

关键词： Bifunctional electrocatalyst Noble-metal free Carbon Transition metal metal-air battery

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一种新型可充的水系铋-空气电池

Science China Materials 2023年第12期66卷 4615-4621页

作者：程翔然姜怡屈佳禾李传发张琨张延安王兵杰彭慧胜 State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science and Laboratory of Advanced MaterialsFudan UniversityShanghai 200438China

水系金属空气电池具有理论能量密度高、安全性高等优点,但受限于金属阳极(如锌、铁、铝、镁)的电化学不可逆性以及碱性电解质对大气中二氧化碳的化学不稳定性.本工作首次设计了一种可充电的铋-空气电池,该电池使用了非碱性的三氟甲磺酸... 详细信息

水系金属空气电池具有理论能量密度高、安全性高等优点,但受限于金属阳极(如锌、铁、铝、镁)的电化学不可逆性以及碱性电解质对大气中二氧化碳的化学不稳定性.本工作首次设计了一种可充电的铋-空气电池,该电池使用了非碱性的三氟甲磺酸铋(Bi(OTf)_(3))水系电解质.得益于三电子反应和相对于标准氢电极+0.32 V的高电位,铋金属负极具有383 mA h g^(−1)的高比容量和1000次循环的良好稳定性,以及99.6%高库仑效率.铋金属负极在Bi(OTf)_(3)电解液中无腐蚀、钝化和析氢等副反应.此外,非碱性的铋-空气电池通过三氧化二铋(Bi_(2)O_(3))的可逆形成/分解,在环境空气中实现了长期运行稳定性(>200 h).这项工作为探索新型水系金属空气电池作为安全稳定的电源系统提供了新思路.

关键词： metal-air battery bismuth anode non-alkaline electrolyte cycling stability

Surface/interface engineering of high-efficiency noble metal-free electrocatalysts for energy-related electrochemical reactions

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Journal of Energy Chemistry 2021年第3期30卷 89-104页

作者： Hui Zhao Zhong-Yong Yuan School of Materials Science and Engineering Liaocheng UniversityLiaocheng 252000ShandongChina Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) School of Materials Science and EngineeringNankai UniversityTianjin 3000350China

To date,much efforts have been devoted to the high-efficiency noble metal-free electrocatalysts for hydrogen-and oxygen-involving energy conversion reactions,due to their abundance,low cost and nultifunctionally.Surface/interface engineering is found to be effective in achieving novel physicochemical properties and synergistic effects in nanomaterials for electrocatalysis.Among various engineering strategies,heteroatom-doping has been regarded as a most promising method to improve the electrocatalytic performance via the regulation of electronic structure of catalysts,and numerous works were reported on the synthesis method and mechanism investigation of heteroatom-doping electrocatalysts,though the heteroatom-doping can only provide limited active sites.Engineering of other defects such as vacancies and edge sites and construction of heterostructure have shown to open up a potential avenue for the development of noble metal-free electrocatalysts.In addition,surface functionalization can attach various molecules onto the surface of materials to easily modify their physical or chemical properties,being as a promising complement or substitute for offering materials with catalytic properties.This paper gives the insights into the diverse strategies of surface/interface engineering of the highefficiency noble metal-free electrocatalysts for energy-related electrochemical reactions.The significant advances are summarized.The unique advantages and mechanisms for specific applications are highlighted.The current challenges and outlook of this growing field are also discussed.

关键词： Noble metal-free electrocatalysts Electrocatalysis Surface/interface engineering metal-air battery Overall water splitting

Magnesium alloys as anodes for neutral aqueous magnesium-air batteries

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Journal of Magnesium and Alloys 2021年第6期9卷 1861-1883页

作者： Fanglei Tong Shanghai Wei Xize Chen Wei Gao Department of Chemical and Materials Engineering Faculty of EngineeringThe University of AucklandAuckland 1010New Zealand

Magnesium(Mg)is abundant,green and low-cost element.Magnesium-air(Mg-air)battery has been used as disposable lighting power supply,emergency and reserve batteries.It is also one of the potential electrical energy storage devices for future electric vehicles(EVs)and portable electronic devices,because of its high theoretical energy density(6.8 k Wh·kg^(-1))and environmental-friendliness.However,the practical application of Mg-air batteries is limited due to the low anodic efficiency of Mg metal anode and sluggish oxygen reduction reaction of air cathode.Mg metal as an anode material is facing two main challenges:high self-corrosion rate and formation of a passivation layer Mg(OH)_(2)which reduces the active surface area.In last decades,a number of Mg alloys,including Mg-Ca,Mg-Zn,commercial Mg-Al-Zn,Mg-Al-Mn,and Mg-Al-Pb alloys,have been studied as anode materials for Mg-air batteries.This article reviews the effect of alloying elements on the battery discharge properties of Mg alloy anodes.The challenges of Mg-air batteries are also discussed,aiming to provide a depth understanding for the theoretical and practical development of high-performance Mg-air batteries.

关键词： metal-air battery Mg anode Mg alloy battery performance

Facile Route to Constructing Ternary Nanoalloy Bifunctional Oxyegn Cathode for metal-air Batteries

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Chemical Research in Chinese Universities 2020年第6期36卷 1153-1160页

作者： WANG Huanfeng LI Junfeng LI Fei LI Jingjing XU Jijing College of Chemical and Food Zhengzhou University of TechnologyZhengzhou 450044P.R.China State Key Laboratory of Inorganic Synthesis&Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012P.R.China International Center of Future Science Jilin UniversityChangchun 130012P.R.China

Highly stable and efficient bifunctional air cathode catalyst is crucial to rechargeable metal-air batteries.Herein,a ternary nanoalloy layer composed of noble and base metal coated on a three-dimensional porous Ni sponge as the bifunctional cathode is synthesized through in-situ anchoring strategy,which can effectively keep the multimetal nanoparticles from agglomeration and improve the density of active sites and catalytic activity.The prepared catalyst displays an excellent catalytic performance with lower overpotential and long-term stability.The Zn-air batteries with the as-prepared cathodes possess a large power density of 170 mW/cm2,long cycling stability up to 230 cycles,and a high specific capacity of 771 mA h/g.Furthermore,the corresponding Li-air batteries deliver a discharge capacity of 22429 mA h/g.These superior properties of the metal-air batteries can be attributed to the combined influence of design and composition of electrode,which is of great significance to improve the electrochemical catalytic activity,providing great potential of wide application in expanded rechargeable energy systems.

关键词： metal-air battery Bifunctional cathode Self-standing Nanosheet Electrochemical performance

An overview of non-noble metal electrocatalysts and their associated air cathodes for Mg-air batteries

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Materials Reports(Energy) 2021年第1期1卷 88-100页

作者： Lei Zhang Qinsi Shao Jiujun Zhang Institute for Sustainable Energy College of SciencesShanghai UniversityShanghai200444China Energy Mining&EnvironmentNational Research Council of CanadaVancouverV6T 1W5Canada

Although metal-air batteries(MABs)including Mg-air batteries possess high theoretical energy densities and are promising in energy storage systems,the poor performances and high cost of corresponding electrocatalysts and air cathodes significantly limit practical application.Based on this,the present review gives a summary of the recent progress in the development of cost effective non-noble metal electrocatalysts and their associated air cathodes for MABs,with a particular focus on Mg-air batteries including the aspects of corresponding catalyst synthesis and characterization,catalyzed oxygen reduction reaction(ORR)mechanism,air cathode fabrication and performance validation.The paper also provides an analysis on the issues that challenge the development of advanced electrocatalysts and the associated air cathodes for Mg-air batteries,as well as a discussion of potential research directions that may help resolve these issues and facilitate the practical application of Mg-air batteries.

关键词： metal-air battery Magnesium-air battery Primary battery Electrocatalyst Cathode Oxygen reduction Electrolyte