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Homogenous coating of li+ conductive li5AlO4 on single-crystalline nonstoichiometric li1.04Ni0.92Al0.04O2 for rechargeable lithium-ion batteries

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Journal of Energy Chemistry 2024年第8期95卷 651-659页

作者： Guoyu Ding Shizhou Wang jinhan li Ziyan Wu Jiayu Chen Jiayong Du Xinhui Huang Kuiming liu Yudong Zhang Zhonghan Wu Yiyang Peng Qiancheng Zhao Meng Yu Fangyi Cheng Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Engineering Research Center of High-efficiency Energy Storage(Ministry of Education) College of Chemistry Nankai University State Key Laboratory of Advanced Chemical Power Sources Nankai University Haihe Laboratory of Sustainable Chemical Transformations

Cobalt-free,nickel-rich liNi1-xAlxO2（x ≤ 0.1） is an attractive cathode material because of high energy density and low cost but suffers from severe structural degradation and poor rate performance.In this study,we propose a molten salt-assisted synthesis in combination with a li-refeeding induced aluminum segregation strategy to prepare li5AlO4-coated single-crystalline slightly li-rich li1.04Ni0.92Al0.04O2.The symbiotic formation of li5AlO4from reaction between molten lithium hydroxide and doped aluminum in the bulk ensures a high lattice matching between the Ni-rich oxide and the homogenous conductive li5AlO4that permits high li+conductivity.Benefiting from mitigated undesirable side reactions and phase evolution,the li5AlO4-coated single-crystalline li1.04Ni0.92Al0.04O2delivers a high specific capacity of220.2 mA h g-1at 0.1 C and considerable rate capability(182.5 mA h g-1at 10 C).Besides,superior capacity retention of 90.8% is obtained at 1/3 C after 100 cycles in a 498.1 mA h pouch full cell.Furthermore,the particulate morphology of li1.04Ni0.92Al0.04O2remains intact after cycling at a cutoff voltage of 4.3 V,whereas slightly li-deficient li0.98Ni0.97Al0.05O2features intragranular cracks and irreversible lattice distortion.The results highlight the value of molten salt-assisted synthesis and li-refeeding induced elemental segregation strategy to upgrade Ni-based layered oxide cathode materials for advanced li-ion batteries.

关键词： Aluminum segregation Cathode materials Molten synthesis Nonstoichiometric oxides Surface coating

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Cell-nucleus structured electrolyte for low-temperature aqueous zinc batteries

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能源化学:英文版 2023年第8期83卷 324-332,I0010页

作者： Yang Dong Ning Zhang Zhaodong Wang jinhan li Youxuan Ni Honglu Hu Fangyi Cheng Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Engineering Research Center of High-efficiency Energy Storage(Ministry of Education)College of ChemistryNankai UniversityTianjin 300071China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China College of Chemistry and Materials Science Analytical Science and Technology of Hebei ProvinceHebei UniversityBaoding 071002HebeiChina

Rechargeable aqueous zinc(Zn) batteries hold great promise for large-scale energy storage,but their implementation is plagued by poor Zn reversibility and unsatisfactory low-temperature performance.Herein,we design a cell-nucleus structured electrolyte by introducing low-polarity 1,2-dimethoxyethane(DME) into dilute 1 M zinc trifluoromethanesulfonate(Zn(OTf)_(2)) aqueous solution,which features an OTf--rich Zn2^(+)-primary solvation sheath(PSS,inner nucleus) and the DMEmodulated Zn^(2+)-outer solvation sheath(outer layer).We find that DME additives with a low dosage do not participate in the Zn2+-PSS but reinforce the Zn-OTf-coordination,which guarantees good reaction kinetics under ultralow temperatures.Moreover,DME breaks the original H-bonding network of H2O,depressing the freezing point of electrolyte to-52.4℃.Such a cell-nucleus-solvation structure suppresses the H_(2)O-induced side reactions and forms an anion-derived solid electrolyte interphase on Zn and can be readily extended to 1,2-diethoxyethane.The as-designed electrolyte enables the Zn electrode deep cycling stability over 3500 h with a high depth-of-discharge of 51.3% and endows the Zn‖V_(2)O_(5)full battery with stable cycling over 1000 cycles at 40℃.This work would inspire the solvation structure design for low-temperature aqueous batteries.

关键词： Aqueous zinc batteries Low temperature Cell-nucleus solvation structure Zn metal anode Solid electrolyte interphase

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Photocatalytic fuel cell for simultaneous antibiotic wastewater treatment and electricity production by anatase TiO_(2) nanoparticles anchored on Ni foam

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Chinese Chemical Letters 2023年第2期34卷 311-316页

作者： jinhan li Xicheng li Shaobin Yu Shuai Gao Yang Zhang Yan li Changzheng Wang Qiang Wang Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation Beijing University of Civil Engineering and ArchitectureBeijing 100044China College of Chemistry Beijing Normal UniversityBeijing 100875China Laboratory for Micro-sized Functional Materials&College of Elementary Education Capital Normal UniversityBeijing 100048China

Photocatalytic fuel cell (PFC) holds great potential for the sustainable production of electricity and degradation of organic pollutants for solving global energy and environmental problems.However,the efficient photodegradation of organic dyes and antibiotic drugs,such as ciprofloxacin (CIP) and methylene blue(MB),remains challenging.Aiming at improving the separation efficiency of hole and electron for electricity generation in the PFC system,TiO_(2)-NPs@NF-x photoanode was fabricated by a cost-effective and laborsaving hydrothermal approach.The as-fabricated photoanode demonstrated abundant active sites,enhanced light harvesting capacity and photogenerated charge carrier separation.At a CIP-HCl concentration of 10 mg/L and p H value of about 7,85%of CIP-HCl can be efficiently removed after 3 h irradiation by 300 W Xe lamp.TiO_(2)-NPs@NF-20 photoelectrode based PFC system exhibited an impressed ability to simultaneously degrade ciprofloxacin and generate electricity under light irradiation with an open circuit voltage of 1.021 V,short circuit current density and maximum power density of 2.4 mA/cm^(2),0.357 mW/cm^(2),respectively.This work provided a cost-effective method for the treatment of organic waste and generation of electrical power.

关键词： Photocatalytic fuel cell TiO_(2) Ni foam Electricity production Antibiotic wastewater treatment

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Dual modulation of morphology and electronic structures of VN@C electrocatalyst by W doping for boosting hydrogen evolution reaction

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Chinese Chemical Letters 2022年第11期33卷 4781-4785页

作者： Danyang He liyun Cao liangliang Feng Shuainan li Yongqiang Feng Guodong li Yifei Zhang jinhan li Jianfeng Huang School of Materials Science&Engineering International S&T Cooperation Foundation of Shaanxi ProvinceXi'an Key Laboratory of Green Manufacture of Ceramic MaterialsShaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic MaterialsKey Laboratory of Auxiliary Chemistry and Technology for Chemical IndustryMinistry of EducationShaanxi University of Science&TechnologyShaanxi 710021China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China

Developing high-efficiency and robust durability electrocatalyst for hydrogen evolution reaction(HER)in water electrolysis functions as a crucial role for the construction of green hydrogen economy,herein,ultrafine W-doped vanadium nitride nanoparticles anchored on N-doped graphitic carbon framework(WVN@NGC)are synthesized through a one-step simple pyrolysis protocol.Owing to the enlarged catalytically active sites,enhanced electrical conductivity and optimized electronic structure,the resultant VN/WN@NGC delivered the prominent HER performance with overpotentials of 143 mV and 158 mV at10 mA/cm^(2) in acid and alkaline media,respectively,accompanied by the long-term stability for at least50 h.This work highlights a novel strategy for a metal-triggered modulation of nitride-based HER electrocatalyst for sustainable energy conversion device.

关键词： Tungsten doping Vanadium nitride Graphitic carbon Electronic structure Hydrogen evolution

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Anionic formulation of electrolyte additive towards stable electrocatalytic oxygen evolution in seawater splitting

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Journal of Energy Chemistry 2022年第9期31卷 361-369,I0010页

作者： Meng Yu jinhan li Fangming liu Jiuding liu Wence Xu Honglu Hu Xijie Chen Weichao Wang Fangyi Cheng Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Engineering Research Center on High-Efficiency Energy Storage(Ministry of Education)Renewable Energy Conversion and Storage CenterCollege of ChemistryNankai UniversityTianjin 300071China Integrated Circuits and Smart System Lab.(Shenzhen) Renewable Energy Conversion and Storage CenterTianjin Key Laboratory of Photo-Electronic Thin Film Device and TechnologyCollege of Electronic Information and Optical EngineeringNankai UniversityTianjin 300071China

Hydrogen generation through seawater electrolysis provides a promising,attractive pathway towards the utilization of sustainable energy.However,the catalytic activity and stability of oxygen evolution anode are severely limited by the chloride-induced corrosion and competitive oxidation reactions.In this work,we demonstrate an anion-assisted performance improvement strategy by quick and universal screening of electrolyte additive via correlating Cl-repellency with the anionic properties.Particularly,the addition of phosphate ions is found to enable highly stable alkaline seawater splitting at industry-level current density(0.5 A cm^(-2))over 500 h using transition metal hydroxides as anodic electrocatalysts.In situ experiments and theoretical simulations further reveal that the dynamic anti-corrosion behaviors of surface-adsorbed phosphate ions are attributed to three factors including repelling Cl-ions without significantly blocking OH-diffusion,preventing transition metal dissolution and acting as a local pH buffer to compensate the fast OH-consumption under high current electrolysis.

关键词： Alkaline seawater splitting Oxygen evolution reaction Stability enhancement Chloride corrosion Phosphate

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铋系光电催化剂降解水中有机污染物的研究进展

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材料工程 2024年第6期52卷 92-108页

作者：李碧秋李希成熊俊夫李金韩贾博雅汪长征北京建筑大学城市雨水系统与水环境教育部重点实验室北京100044 北京市供水管理事务中心北京100195 河北省承德市自然资源和规划局河北承德067000

光电催化技术通过电场协助光催化,能有效抑制光生载流子复合,提高有机污染物的去除率,具有简便、高效、易操作等优点。光电极材料是光电催化技术的关键,相较于其他传统催化剂,铋系半导体具有独特的层状结构和适宜的禁带宽度,对光的利用... 详细信息

光电催化技术通过电场协助光催化,能有效抑制光生载流子复合,提高有机污染物的去除率,具有简便、高效、易操作等优点。光电极材料是光电催化技术的关键,相较于其他传统催化剂,铋系半导体具有独特的层状结构和适宜的禁带宽度,对光的利用率更高。层状结构使铋系材料能在层内诱导内部电场,促进光生电子和空穴分离,加速载流子转移,提升光催化性能。本文介绍了一元铋系化合物、二元铋系化合物、卤氧化铋系化合物和含氧酸型铋系化合物的制备、表征及性能,简述了铋系材料作为光电极材料的优势。综述了其对有机污染物降解的研究,对铋系材料应用于光电催化进行废水处理进行了总结,新型催化剂的开发和如何推进建立催化剂全生命周期内对环境产生的影响评价体系是后续研究的重点方向。

关键词：光电催化铋系材料废水处理复合电极

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Electrodeposition of Pt-Decorated Ni(OH)_(2)/CeO_(2) Hybrid as Superior Bifunctional Electrocatalyst for Water Splitting

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Research 2020年第1期2020卷 1698-1708页

作者： Huanhuan liu Zhenhua Yan Xiang Chen jinhan li Le Zhang Fangming liu Guilan Fan Fangyi Cheng Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Renewable Energy Conversion and Storage CenterCollege of ChemistryNankai UniversityTianjin 300071China

The facile synthesis of highly active and stable bifunctional electrocatalysts to catalyze water splitting is attractive but challenging.Herein,we report the electrodeposition of Pt-decorated Ni(OH)_(2)/CeO_(2)(PNC)hybrid as an efficient and robust bifunctional electrocatalyst.The graphite-supported PNC catalyst delivers superior hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)activities over the benchmark Pt/C and RuO_(2),respectively.For overall water electrolysis,the PNC hybrid only requires a cell voltage of 1.45V at 10mAcm-2 and sustains over 85 h at 1000mAcm^(-2).The remarkable HER/OER performances are attributed to the superhydrophilicity and multiple effects of PNC,in which Ni(OH)_(2)and CeO_(2)accelerate HER on Pt due to promoted water dissociation and strong electronic interaction,while the electron-pulling Ce cations facilitate the generation of high-valence Ni OER-active species.These results suggest the promising application of PNC for H2 production from water electrolysis.

关键词： catalyst attributed attractive

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Ni_(3)S_(2)@NiFePx electrode with dual-anion-modulated layer for efficient and stable oxygen evolution

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Chinese Chemical Letters 2023年第11期34卷 291-296页

作者： Xijie Chen Keqiang Xu jinhan li Xiao Wang Tete Zhao Fangming liu Meng Yu Fangyi Cheng Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Engineering Research Center of High-efficiency Energy Storage(Ministry of Education)College of ChemistryNankai UniversityTianjin 300071China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

The rational construction of high-performance and stable electrocatalyst for oxygen evolution reaction(OER)is a prerequisite for efficient water electrolysis.Herein,we develop a broccoli-like Ni_(3)S_(2)@NiFeP_(x)(Ni_(3)S_(2)@NFP)catalyst on nickel foam(NF)via a sequential two-step layer-by-layer assembly electrodeposition method.X-ray diffraction,in situ Raman and Fourier-transform infrared spectra have mutually validated the element segregation and phase refusion during OER condition.The reconstruction of double layer Ni_(3)S_(2)@NFP facilitates the formation of the active(oxy)hydroxides,which is modulated by the dual anionic layer with mixed sulfate and phosphate ions.As a result,the obtained Ni_(3)S_(2)@NFP electrode exhibits low overpotential(329 mV)and long-term durability(∼500 h)for OER at current density of 500mA/cm^(2).Moreover,the self-supported Ni_(3)S_(2)@NFP can act as an efficient and durable anode in alkaline anion exchange membrane water electrolysis device(AEMWE).This work provides a facile and scaled-up strategy to construct self-supported electrocatalyst and emphasizes the crucial role of anions in pre-catalyst reconstruction and enhancing OER performance.

关键词： Oxygen evolution reaction Anion-modulated layer Electrochemical reconstruction Phosphide Sulfide Membrane electrode assembly

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Contradictory effect of gold nanoparticle-decorated molybdenum sulfide nanocomposites on amyloid-β-40 aggregation

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Chinese Chemical Letters 2020年第12期31卷 3113-3116页

作者： Yaqin liu Yan Zheng Shaoyuan li jinhan li Xiaoyu Du Yanyun Ma Guofu liao Qing Wang Xiaohai Yang Kemin Wang State Key Laboratory of Chemo/Biosensing and Chemometrics College of Cchemistry and Chemical EnginerngKey Laboratory for Bio-Nanotchmrology and Molecular Engineering of Hunan ProvinceHunan UniversityChangsha 410082China

The effect of gold nanoparticle-decorated molybdenum sulfide(AuNP-MoS2)nanocomposites on amyloid-β-40(Aβ40)aggregation was investigated.The interesting discovery was that the effect of AuNPMoS2 nanocomposites on Aβ40 aggregation was contradictory.Low concentration of AuNP-MoS2 nanocomposites could enhance the nucleus formation of Aβ40 peptides and accelerate Aβ40 fibrils aggregation.However,although high concentration of AuNP-MoS2 nanocomposites could enhance the nucleus formation of Aβ40 peptides,it eventually inhibited Aβ40 aggregation process.It might be attributed to the interaction between AuNP-MoS2 nanocomposites and Aβ40 peptides.For low concentration of AuNP-MoS2 nanocomposites,it was acted as nuclei,resulting in the acceleration of the nucleation process.However,the structural flexibility of Aβ40 peptides was limited as the concentration of AuNP-MoS2 nanocomposites was increased,resulting in the inhibition of Aβ40aggregation.These findings suggested that AuNP-MoS2 nanocomposites might have a great potential to design new multifunctional material for future treatment of amyloid-related diseases.

关键词： Amyloid peptides Gold nanoparticle-decorated molybdenum sulfide Inhibition Acceleration Atomic force microscopy

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北京市农村供水规范化管理评价体系构建

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北京水务 2024年第3期 33-39页

作者：邱彦昭杜婷婷顾雅琪李金韩唐丽北京市水科学技术研究院北京100048 北京市供水管理事务中心北京101117 北京市水务局政务服务中心北京100071

针对北京市农村供水管理的现状,基于模糊综合评价法,通过设定评价指标及标准、确定权重系数,构建形成农村供水规范化管理评价体系,并对村庄供水规范化管理水平进行量化评估。探讨了完善管理制度、创新运维模式、明确经费来源及加强智慧... 详细信息

针对北京市农村供水管理的现状,基于模糊综合评价法,通过设定评价指标及标准、确定权重系数,构建形成农村供水规范化管理评价体系,并对村庄供水规范化管理水平进行量化评估。探讨了完善管理制度、创新运维模式、明确经费来源及加强智慧水务建设等方面的措施,以期提升农村供水智能化监管及服务水平。该评价体系的构建为北京市乃至其他地区农村供水规范化管理提供了有益参考,有助于推动农村供水事业的可持续发展。

关键词：农村供水规范化管理评价体系构建

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