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Tuning of interactions between cathode and lithium polysulfide in Li-S battery by rational halogenation

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Journal of Energy Chemistry 2020年第10期29卷 147-152页

作者： Samson O.Olanrele Zan Lian Chaowei Si Shuo Chen Bo Li Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016LiaoningChina School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016LiaoningChina Key Laboratory of Functional Inorganic Material Chemistry(Ministry of Education of China) School of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080HeilongjiangChina Chemical Sciences Department Mountain Top UniversityOgun StateNigeria

Li-S batteries have aroused intense interests as one of the most promising high-energy-density storage ***,the co.plex undesired shuttle effect induced by dissolution and diffusion of lithium polysulfide intermediates remains the major setback of this *** modification of carbon cathode through heteroatom-doping is widely accepted as an effective method to inhibit the shuttle effect in Li-S battery ***,using first principle calculations,we systematically examined the interaction between halogenated graphene and lithium polysulfide *** is found that the halogen dopants(F,Cl,Br,I)significantly modify the local electronic structure of adsorption site and further induce a polarization to trap the ***,a co.cave curve is observed from F to I for lithium polysulfide adsorption rather than a linear *** exceptions demonstrated from iodine dopant is carefully analyzed and attributed to its unique charge ***,boron as seco.d dopant further strengthens the interaction between halogenated graphene and polysulfide *** on halogenation strategy,lithium polysulfide/cathode interactions are tuned in a wide range,which can also be of great importance to accelerate redox reaction in Li-S ***,an effective method by halogenation is verified to regulate the adsorption of lithium polysulfide and also enhance the reaction kinetics of the Li-S battery system.

关键词： Li-S battery Halogenation Shuttle effect co.doping

Single ion co.ducting sodium ion batteries enabled by a sodium ion exchanged poly(bis(4-carbonyl benzene sulfonyl)imide-co.2,5–diamino benzesulfonic acid) polymer electrolyte

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Single ion conducting sodium ion batteries enabled by a sodi...

Inherent mass transfer engineering of a co.N co.doped carbon material towards oxygen reduction reaction

中国化学会第三届中国能源材料化学研讨会

作者： Qiyun Pan Institute of Advanced Materials Research Hubei key Laboratory of Pollutant Analysis & Reuse TechnologyHubei Normal University

A single ion co.ducting sodium ion battery was fabricated and its operability at 20 ℃ and 80 ℃ was successfully *** the battery device,sodium ion transport was mediated by a polymer electrolyte membrane based on a s...

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Journal of Energy Chemistry 2021年第7期30卷 391-396页

作者： Yanzhi Wang Bin Wang Haitao Yuan Zuozhong Liang Zhehao Huang Yuye Zhou Wei Zhang Haoquan Zheng Rui Cao Key Laboratory of Applied Surface and co.loid Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi’an 710119ShaanxiChina Department of Materials and Environmental Chemistry Stockholm UniversityStockholm SE-10691Sweden KTH Royal Institute of technology School of Engineering Sciences in ChemistryBiotechnology and HealthDepartment of ChemistryDivision of Applied Physical ChemistryAnalytical ChemistryStockholm SE-10044Sweden

Oxygen reduction reaction (ORR) is an important process for the co.version and utilization of a wide range of renewable energy sources, and is critical for the shape of future energy scenario [1–10]. However, ORR is a co.plex four-electron transfer process and is kinetically sluggish. It is urgent to develop high-efficient electrocatalysts to solve this problem [11–15]. Up to now, precious metal-based catalysts such as Pt-based electrocatalysts have been widely studied and found to be one of the most efficient electrocatalysts for ORR. However, the high price and the small reserves limit their large-scale co.mercialization [10,16–23]. Therefore, in order to fulfill needs for the practical applications, it is necessary to develop low-co.t electrocatalysts, also with high activity and great stability [19,24–28].

关键词： co.N co.doped porous carbon Electrocatalysis Oxygen reduction reaction Zn-air battery

co.structing bifunctional co.MoC@N-C catalyst via an in-situ encapsulation strategy for efficient oxygen electrocatalysis

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Journal of Energy Chemistry 2021年第8期30卷 538-546,I0011页

作者： Hui Huang Lingjun Kong Ming Liu Jie He Wei Shuang Yunhua Xu Xian-He Bu School of Materials Science and Engineering National Institute for Advanced MaterialsTKL of Metal and Molecule Based Material ChemistryNankai University300071 TianjinChina School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education)and Tianjin Key Laboratory of Composite and Functional MaterialsTianjin University300072 TianjinChina Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai University300071 TianjinChina

The large-scale application of Zn-air battery requires the development of efficient,low-co.t,and stable bifunctional electrocatalysts for the oxygen evolution reaction(OER)and oxygen reduction reaction(ORR).Herein,an electrocatalyst of a co.Mo C-nanoparticles embedded N-doped carbon(co.Mo C@N-C)was prepared via the in-situ encapsulation of co.(2)(co._(8)and Mo(co.6 in ZIF-8 using ball-milling,followed by pyrolysis under an Ar *** used as a bifunctional electrocatalyst,the as-prepared co.Mo C@N-C showed an ORR half-wave potential of 0.824 V in an alkaline medium and an overpotential of only 290 m V for the OER at 10 m A cm^(-2),which was 70 m V lower than Ru O_(2).The co.Mo C@N-C was also evaluated as a cathode in a solid-state Zn-air battery and delivered a higher peak discharge power density and better cycling stability(over 1600 min)than Pt/C-Ru O_(2).Most importantly,our work provides a new strategy to prepare bifunctional catalysts and promotes their applications in the energy co.version field.

关键词： In-situ ZIF-8 Bifunctional electrocatalyst New strategy

co.tamination co.trol-Enabler for Fuel Cell technology

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Contamination Control-Enabler for Fuel Cell Technology

A new kind of lithium ion battery withenhanced electrochemical performances

2018中国汽车工程学会年会

作者： Harenbrock Michael Ising Robin Wildermuth Andreas Diersch Stefan Hallbauer Eva MANN+HUMMEL GmbH MANN+HUMMEL Innenraumfilter GmbH&co.KG

Automotive fuel cell systems are often called the "Ultimate Zero Emission Powertrain".Their application in passenger cars,buses or trucks offers opportunities to co.er use cases in which battery Electric Vehicles（BEV） reach their limits due to charging needs and driving range requirements in co.bination with high vehicle *** reach the fuel cell system’s expected life-time,co.taminants from co.lants and especially cathode air have to be removed *** investigations reveal that gases co.taining S-or Natoms will poison the fuel cell *** and ions in the co.ling liquid will lead to electric shorts and wear,leading to increased degradation *** paper describes co.tamination co.trol solutions for Low Temperature Proton Exchange Membrane（LT PEM） fuel cells.

关键词： fuel cell system degradation co.tamination cathode air filter ion exchange filter co.lant particle filter

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A new kind of lithium ion battery withenhanced electrochemic...

Reinforced cathode-garnet interface for high-capacity all-solid-state batteries

第一届全国储能科学与技术大会

作者：张卫新 MA Guo LU Jianbo YANG Zeheng School of Chemistry and Chemical Engineering Hefei University of Technology Anhui Key Laboratory of co.trollable Chemical Reaction & Material Chemical Engineering

To meet the demand in electric vehicles and energy storage applications,it is necessary for next generation lithium-ion batteries to have high energy density and fast charge and discharge *** manuscript demonstrates the preparation of transition metal oxide micro/nanostructured arrays on metal substrates as anode and high energy hierarchical cathode materials towards fabricating new lithium-ion batteries with enhanced electrochemical *** one hand,a bulk aqueous solution-based process and a microemulsion-mediated process have been developed respectively to co.trol the kinetic and thermodynamic processes for the transition metal oxide micro/nanostructured arrays grownon metal substrates as anode *** the other hand,aseries of hierarchical cathode materials,including spinel LiNiMnO,layered LiNico.nO,and lithium-richlayered 0.5LiMnO.0.5LiNiMnco.,have been successfully prepared by a co.trollable stepwise co.precipitation *** match design for the full cells not only takes advantages of the high specific capacity,high rate capability,good safety and other features related with the anode and cathode materials,but also simplifies the assembly procedures of full cells.

关键词： lithium-ion battery fabrication transition metal oxide micro/nanostructured arrays hierarchical cathode materials

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Materials Futures 2022年第4期1卷 144-153页

作者： Chenxi Zheng Shijun Tang Fangmei Wen Jinxue Peng Wu Yang Zhongwei Lv Yongmin Wu Weiping Tang Zhengliang Gong Yong Yang co.lege of Energy Xiamen UniversityXiamen 361102People’s Republic of China State Key Laboratory of Space Power-Sources technology Shanghai Institute of Space Power-SourcesShanghai 200245People’s Republic of China State Key Laboratory for Physical Chemistry of Solid Surface Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005People’s Republic of China

Garnet-type solid-state electrolytes(SSEs)are particularly attractive in the co.struction of all-solid-state lithium(Li)batteries due to their high ionic co.ductivity,wide electrochemical window and remarkable(electro)chemical ***,the intractable issues of poor cathode/garnet interface and general low cathode loading hinder their practical ***,we demonstrate the co.struction of a reinforced cathode/garnet interface by spark plasma sintering,via co.sintering Li_(6.5)La_(3)Zr_(1.5)Ta_(0.5)O_(12)(LLZTO)electrolyte powder and Lico._(2)/LLZTO co.posite cathode powder directly into a dense dual-layer with 5 wt%Li_(3)BO_(3)as sintering *** bulk co.posite cathode with Lico._(2)/LLZTO cross-linked structure is firmly welded to the LLZTO layer,which optimizes both Li-ion and electron ***,the one-step integrated sintering process implements an ultra-low cathode/garnet interfacial resistance of 3.9Ωcm^(2)(100◦C)and a high cathode loading up to 2.02 mAh cm^(−2).Moreover,the Li_(3)BO_(3)reinforced Lico._(2)/LLZTO interface also effectively mitigates the strain/stress of Lico._(2),which facilitates the achieving of superior cycling *** bulk-type Li|LLZTO|Lico._(2)-LLZTO full cell with areal capacity of 0.73 mAh cm^(−2)delivers capacity retention of 81.7%after 50 cycles at 100μA cm^(−2).Furthermore,we reveal that non-uniform Li plating/stripping leads to the formation of gaps and finally results in the separation of Li and LLZTO electrolyte during long-term cycling,which beco.es the dominant capacity decay mechanism in high-capacity full *** work provides insight into the degradation of Li/SSE interface and a strategy to radically improve the electrochemical performance of garnet-based all-solid-state Li batteries.

关键词： garnet electrolyte all-solid-state battery high cathode loading interface evolution spark plasma sintering

N-掺杂碳纳米管包覆的co.i合金作为氧还原催化剂的活性位点研究

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Science China Materials 2021年第11期64卷 2719-2728页

作者：王颖佟苗苗王蕾刘旭田春贵付宏刚 Key Laboratory of Superlight Materials and Surface technology of Ministry of Education College of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education of ChinaHeilongjiang UniversityHarbin 150080China

过渡金属合金电催化剂引起了人们对氧还原反应(ORR)的强烈兴趣,但是对其活性位的研究尚不深入.本论文中,我们通过对普鲁士蓝类似物的热解,得到将co.i合金纳米粒子封装在竹节状N-掺杂碳纳米管中的复合物(co.i-NCT).通过密度泛函理论计算... 详细信息

过渡金属合金电催化剂引起了人们对氧还原反应(ORR)的强烈兴趣,但是对其活性位的研究尚不深入.本论文中,我们通过对普鲁士蓝类似物的热解,得到将co.i合金纳米粒子封装在竹节状N-掺杂碳纳米管中的复合物(co.i-NCT).通过密度泛函理论计算表明,氧分子更容易吸附在合金中的Ni位点上,而co.点有利于降低ORR过程中OOH中间体的形成势垒.此外,co.i合金与N掺杂的碳有利于电子转移,提高电催化活性.优化的co.i-NCT表现出卓越的ORR催化活性,半波电势为0.83 V,起始电位为0.97 V,并且具有优异的稳定性,性能优于商业Pt/C催化剂.作为空气正极组装的锌-空气电池,在10 mA cm^(-2)时充放电电压差为0.86 V,功率密度为167 mW cm^(-2),且具有良好的稳定性(可稳定运行900次).

关键词：密度泛函理论计算充放电电压竹节状氧分子电催化活性电催化剂 Pt/C催化剂电子转移

Operando surface science methodology reveals surface effect in charge storage electrodes

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National Science Review 2021年第3期8卷 70-77页

作者： Chao Wang Yanxiao Ning Haibo Huang Shiwen Li Chuanhai Xiao Qi Chen Li Peng Shuainan Guo Yifan Li co.ghui Liu Zhong-Shuai Wu Xianfeng Li Liwei Chen Chao Gao Chuan Wu Qiang Fu State Key Laboratory of Catalysis iChEMDalian Institute of Chemical PhysicsChinese Academy of Sciences University of Chinese Academy of Sciences Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science &Engineering Beijing Institute of Technology

Surface and interface play critical roles in energy storage devices,calling for operando characterization techniques to probe the electrified surfaces/*** this work,surface science methodology,including electron spectrosco.y and scanning probe microsco.y,has been successfully applied to visualize electrochemical processes at operating electrode surfaces in an Al/graphite model *** of anions together with cations is directly observed in the surface region of a graphite electrode with tens of nanometers thickness,the co.centration of which is one order higher than that in *** intercalation pseudocapacitance mechanism and a double specific capacity in the electrode surface region are expected based on the super-dense intercalants and anion/cation co.intercalation,which are in sharp co.trast to the battery-like mechanism in the electrode *** distinct electrochemical mechanism at the electrode surface is verified by performance tests of real battery devices,showing that a surface-dominant,nanometer-thick graphite cathode outperforms a bulk-dominant,micrometer-thick graphite *** findings highlight the important surface effect of working electrodes in charge storage systems.

关键词： surface science methodology aluminum ion battery operando characterization surface effect