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Boosting bidirectional sulfur conversion enabled by introducing boron-doped atoms and phosphorus vacancies in Ni_(2)P for lithium-sulfur batteries

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Journal of Energy Chemistry 2025年第1期100卷 760-769页

作者： Lin Peng Yu Bai Hang Li Meixiu Qu Zhenhua Wang Kening Sun Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China beijing key laboratory of chemical power source and green catalysis School of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China

Lithium-sulfur (Li-S) batteries have gained great attention due to the high theoretical energy density and low cost,yet their further commercialization has been obstructed by the notorious shuttle effect and sluggish redox ***,we supply a strategy to optimize the electron structure of Ni_(2)P by concurrently introducing B-doped atoms and P vacancies in Ni_(2)P (Vp-B-Ni_(2)P),thereby enhancing the bidirectional sulfur *** study indicates that the simultaneous introduction of B-doped atoms and P vacancies in Ni_(2)P causes the redistribution of electron around Ni atoms,bringing about the upward shift of d-band center of Ni atoms and effective d-p orbital hybridization between Ni atoms and sulfur species,thus strengthening the chemical anchoring for lithium polysulfides (LiPSs) as well as expediting the bidirectional conversion kinetics of sulfur ***,theoretical calculations reveal that the incorporation of B-doped atoms and P vacancies in Ni_(2)P selectively promotes Li2S dissolution and nucleation ***,the Li-S batteries with Vp-B-Ni_(2)P-separators present outstanding rate ability of 777 m A h g^(-1)at 5 C and high areal capacity of 8.03 mA h cm^(-2)under E/S of 5μL mg^(-1)and sulfur loading of 7.20 mg cm^(-2).This work elucidates that introducing heteroatom and vacancy in metal phosphide collaboratively regulates the electron structure to accelerate bidirectional sulfur conversion.

关键词： B-doped atoms P vacancies Nickel phosphide Bidirectional sulfur conversion Lithium-sulfur batteries

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Sc-doped strontium iron molybdenum cathode for high-efficiency CO_(2)electrolysis in solid oxide electrolysis cell

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燃料化学学报(中英文) 2025年第2期53卷 272-281页

作者： LIU Zhen ZHANG Lihong XU Chunming WANG Zhenhua QIAO Jinshuo SUN Wang SUN Kening beijing key laboratory of chemical power source and green catalysis School of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China Shaanxi key laboratory of catalysis School of Chemistry and Environment ScienceShaanxi University of TechnologyHanzhong 723001China

Solid oxide electrolysis cells(SOECs)can effectively convert CO_(2)into high value-added CO *** this paper,Sc-doped Sr_(2)Fe_(1.5)Mo_(0.3)Sc_(0.2)O_(6−δ)(SFMSc)perovskite oxide material is synthesized via solid-phase method as the cathode for CO_(2)electrolysis by *** confirms that SFMSc exhibits a stable cubic phase crystal *** experimental results of TPD,TG,EPR,CO_(2)-TPD further demonstrate that Sc-doping increases the concentration of oxygen vacancy in the material and the chemical adsorption capacity of CO_(2)*** tests reveal that SFMSc single cell achieves a current density of 2.26 A/cm^(2) and a lower polarization impedance of 0.32Ω·cm^(2) at 800°C under the applied voltage of 1.8 *** no significant performance attenuation or carbon deposition is observed after 80 h continuous long-term stability *** study provides a favorable support for the development of SOEC cathode materials with good electro-catalytic performance and stability.

关键词： solid oxide electrolysis cells cathode perovskite electro-catalysis element doping

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Copper-catalyzed C–C bond cleavage coupling with C≡N bond formation toward mild synthesis of lignin-based benzonitriles

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Journal of Environmental Sciences 2025年第5期151卷 505-515页

作者： Qi Luo Shenglong Tian Qian Qiang Fei song Wentao Su Haiyan He Qingda An Changzhi Li Liaoning key Lab of Lignocellulose Chemistry and BioMaterials Liaoning Collaborative Innovation Center for Lignocellulosic BiorefinerySchool of Light Industry and Chemical EngineeringDalian Polytechnic UniversityDalian 116034China CAS key laboratory of Science and Technology on Applied catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Science Beijing 100049China

N-participated lignin depolymerization is of great importance for the transformation of waste lignin into value-added *** vast majority of developed strategies employ organic amines as nitrogen source,and considerablemethods rely on excessive use of strong base,which suffers severe environmental ***,benzonitrile derivatives are synthesized from oxidized ligninβ-O-4 model compounds in the presence of solid nitrogen source(NH_(4))_(2)CO_(3)under mild,base-free conditions over commercially available copper *** studies suggest the transformation undergoes a one-pot,highly coupled cascade reaction path involving oxidative C-C bond cleavage and in-situ formation of C≡N *** which,Cu(OAc)2 catalyzes the transfer of hydrogen from C_(β)(C_(β)-H)to C_(α),leading to the cleavage of C_(α)-C_(β)bonds to offer benzaldehyde derivative,this intermediate then reacts in-situ with(NH_(4))_(2)CO_(3)to afford the targeted aromatic nitrile *** iodide(TBAI),acting as a promoter,plays a key role in breaking the C_(α)-C_(β)bonds to form the intermediate benzaldehyde *** this protocol,the feasibility of the production of value-added syringonitrile from birchwood lignin has been *** transformation provides a sustainable approach to benzonitrile chemicals from renewable source of lignin.

关键词： Lignin β-O-4 model compounds Benzonitrile derivatives Copper catalyst Mild conditions

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Enantio-divergent C–H borylation with two different ligands from a single chiral source

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Science China Chemistry 2025年第1期68卷 226-232页

作者： Rongrong Du Senmiao Xu State key laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China College of Material Chemistry and chemical Engineering Key Laboratory of Organosilicon Chemistry and Material TechnologyMinistry of EducationHangzhou Normal UniversityHangzhou 311121China University of Chinese Academy of Sciences Beijing 100049China

Reported here is an iridium-catalyzed enantio-divergent C(sp^(3))–H borylation ofα-gem-dimethyl groups of trifluoromethyl ketone-derived hydrazones to construct a series of acyclic all-carbon quaternary stereocenters with a high level of chiral *** different chiral bidentate boryl ligands from a common chiral source not only can switch the enantioselectivity but also are complementary in terms of the substrate scope.

关键词： asymmetric catalysis C–H borylation all-carbon quaternary stereocenters synthetic methods

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Recent progress and perspectives on highly-safe and energy-dense solid-state Li-CO_(2) batteries

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Science Bulletin 2025年第2期70卷 135-139页

作者： Yunyun Xu Zichen Xu Sang-Young Lee Zhong-Shuai Wu State key laboratory of catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Department of chemical and Biomolecular Engineering Yonsei UniversitySeoul 03722Republic of Korea Dalian National laboratory for Clean Energy Chinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China

Li-CO_(2)batteries are highly anticipated as promising candidates for advanced electrochemical energy storage systems owing to their high theoretical specific energy of 1876 Wh kg^(-1),based on the discharge products of Li_(2)CO_(3)and C,their environmentally benign CO_(2)utilization [1].Since CO_(2)is the main component of the atmosphere on Mars,Li-CO_(2)batteries can serve as an excellent power source for Mars exploration ***,several key issues remain unresolved,such as the slow kinetics of CO_(2)reduction reaction(CRR) and CO_(2)evolution reaction(CER),the severe side reaction between Li with CO_(2),and the risk of the electrolyte combustion due to thermal runaway,all of which hinder the practical application of Li-CO_(2)batteries.

关键词： energy hinder electrolyte

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Direct seawater splitting for hydrogen production:Recent advances in materials synthesis and technological innovation

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green Energy & Environment 2025年第1期10卷 11-33页

作者： Yilin Zhao Zhipeng Yu Aimin Ge Lujia Liu Joaquim Luis Faria Guiyin Xu Meifang Zhu State key laboratory for Modification of chemical Fibers and Polymer Materials Center for Advanced Low-dimension MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai201620China International Iberian Nanotechnology laboratory(INL) Avenida Mestre Jose VeigaBraga4715-330Portugal The MacDiarmid Institute for Advanced Materials and Nanotechnology School of Chemical and Physical SciencesVictoria University of WellingtonWellington6012New Zealand LSRE-LCM-laboratory of Separation and Reaction Engineering-laboratory of catalysis and Materials Faculty of EngineeringUniversity of PortoRua Dr.Roberto Frias s/nPorto4200-465Portugal ALiCE-Associate laboratory in chemical Engineering Faculty of EngineeringUniversity of PortoRua Dr.Roberto Frias s/nPorto4200-465Portugal

Direct seawater splitting has emerged as a popular and promising research direction for synthesising clean,green,non-polluting,and sustainable hydrogen energy without depending on high-purity water in the face of the world’s shortage of fossil ***,efficient seawater splitting is hindered by slow kinetics caused by the ultra-low conductivity and the presence of bacteria,microorganisms,and stray ions in ***,producing hydrogen on an industrial scale is challenging due to the high production *** present review addresses these challenges from the catalyst point of view,namely,that designing catalysts with high catalytic activity and stability can directly affect the rate and effect of seawater *** the ion transfer perspective,designing membranes can block harmful ions,improving the stability of seawater *** the energy point of view,mixed seawater systems and self-powered systems also provide new and low-energy research systems for seawater ***,ideas and directions for further research on direct seawater splitting in the future are pointed out,with the aim of achieving low-cost and high-efficiency hydrogen production.

关键词： Seawater splitting Catalyst Membranes Mixed seawater systems Self-powered systems

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A homogeneous and mechanically stable artificial diffusion layer using rigid-flexible hybrid polymer for high-performance lithium metal batteries

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Journal of Energy Chemistry 2023年第1期76卷 631-638,I0015页

作者： Zhenkang Lin Yuyan Ma Wei Wang Yu He Menghao Wang Jun Tang Cheng Fan Kening Sun beijing key laboratory for chemical power source and green catalysis School of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China

Artificial solid electrolyte interphase(SEI) is promising to inhibit uncontrollable lithium dendrites and enable long cycling stability for lithium metal batteries. However, the essential mechanical stability is limited since organic layers generally have low modulus whereas intrinsic brittleness for inorganic ones remains a great concern. Polymer-based SEIs with rigid and flexible chains in adequate mechanical properties are supposed to address this issue. Herein, a homogeneous and mechanically stable diffusion layer is achieved by blending rigid chains of polyphenylene sulfone(PPSU) with flexible chains of poly(vinylidene fluoride)(PVDF) in a hybrid membrane, enabling uniform diffusion and stabilizing the lithium metal anode. The Li||Cu cell with the protected electrode exhibits a long lifetime more than 450 cycles(0.5 m A cm^(-2), 1.0 m A h cm^(-2))(fourfold longer than the control group) with higher average Coulombic efficiency of 98.7%. Enhanced performances are also observed at Li||Li and full cell configurations. The improved performances are attributed to the controlled morphology and stable interphase, according to scanning electron microscopy(SEM) and electrochemical impedance. This research advances the idea of uniform lithium plating and provides a new insight on how to create a homogeneous and mechanically stable diffusion layer using rigid-flexible polymers.

关键词： Lithium metal battery Lithium dendrite Uniform diffusion Rigid-flexible artificial layer Electrochemical impedance

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Balancing particle properties for practical lithium-ion batteries

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Particuology 2022年第2期20卷 18-29页

作者： Jing Zhang Jinshuo Qiao Kening Sun Zhenhua Wang beijing key laboratory for chemical power source and green catalysis School of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China

As a state-of-the-art secondary battery,lithium-ion batteries(LIBs)have dominated the consumer electronics market since Sony unveiled the commercial secondary battery with LiCoO_(2) as the negative electrode material in the early *** key to the efficient operation of LIBs lies in the effective contact between the Li-ion-rich electrolyte and the active material particles in the *** particle properties of the electrode materials affect the lithium ion diffusion path,diffusion resistance,contact area with the active material,the electrochemical performance and the energy density of *** achieve satisfied comprehensive performance and of LIBs,it is not only necessary to focus on the modification of materials,but also to balance the properties of electrode material ***,in this review,we analyze the influence of particle properties on the battery performance from three perspectives:particle size,particle size distribution,and particle shape.A deep understanding of the effect and mechanism of particles on electrodes and batteries will help develop and manufacture practical LIBs.

关键词： Lithium-ion battery Particle properties Particle size Particle size distribution Particle shape

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Progress and challenges of carbon-fueled solid oxide fuel cells anode

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Journal of Energy Chemistry 2021年第5期30卷 209-222页

作者： Minjian Ma Xiaoxia Yang Jinshuo Qiao Wang Sun Zhenhua Wang Kening Sun beijing key laboratory for chemical power source and green catalysis School of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China

Carbon-fueled solid oxide fuel cells(CF-SOFCs)can electrochemically convert the chemical energy in carbon into electricity,which demonstrate both superior electrical efficiency and fuel utilisation compared to all other types of fuel ***,using solid carbon as the fuel of SOFCs also faces some challenges,the fluid mobility and reactive activity of carbon-based fuels are much lower than those of gaseous ***,the anode reaction kinetics plays a crucial role in determining the electrochemical performance of ***,the progress of various anodes in CF-SOFCs is reviewed from the perspective of material compositions,electrochemical performance and *** faced in developing high performance anodes for CF-SOFCs are also discussed.

关键词： Carbon Anodes Solid oxide fuel cells Energy conversion Reaction processes

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Nanoscale transition metal catalysts anchored on perovskite oxide enabling enhanced kinetics of lithium polysulfide redox in lithium-sulfur batteries

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Journal of Energy Chemistry 2023年第6期81卷 432-442,I0010页

作者： Wenshuo Hou Ruilong Li Zhenhua Wang Li Fang Zhe Bai Tan Wang Yu Bai Kening Sun beijing key laboratory of chemical power source and green catalysis School of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China

To obtain high-performance lithium-sulfur(Li-S)batteries,it is necessary to rationally design electrocatalytic materials that can promote efficient sulfur electrochemical ***,the robust heterostructured material of nanoscale transition metal anchored on perovskite oxide was designed for efficient catalytic kinetics of the oxidation and reduction reactions of lithium polysulphide(Li PSs),and verified by density functional theory(DFT)calculations and experimental *** to the strong interaction of nanoscale transition metals with Li PSs through chemical coupling,heterostructured materials(STO@M)(M=Fe,Ni,Cu)exhibit excellent catalytic activity for redox reactions of Li *** bifunctional heterostructure material STO@Fe exhibits good rate performance and cycling stability as the cathode host,realizing a high-performance Li-S battery that can maintain stable cycling under rapid charge-discharge *** study presents a novel approach to designing electrocatalytic materials for redox reactions of Li PSs,which promotes the development of fast charge-discharge Li-S batteries.

关键词： Nanoscale transition metal Lithium polysulfide Catalytic activity Redox reaction Lithium-sulfur battery

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