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SSRN 2023年

作者： Zhang, Qiuyitong Xu, Yuexin Lv, Ning Li, Hanyang Wei, Zijie Tiana, Tian Wang, Yadong Tang, Haolin State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen Valley Foshan528200 China

A simplified and greener procedure for in-situ obtaining polyimide anode materials for lithium-ion battery electrodes is developed. The combined polyimide material synthesis and electrode preparation reduces the number of processing steps and treatment duration and decreases the energy required for heat treatment, solvent evaporation, and organic solvent use. More importantly, polymerization in situ on the electrode surface render the polyimide particles a sea urchin-like structure, leading to fast electrochemical kinetics, and significant improvement in discharge capacity and cycling performance compared with materials obtained using traditional procedures. Specific capacities of 1870 mAh g-1 and 2277 mAh g-1 at 30℃ and 60℃, respectively, are obtained. A capacity of 1774 mAh g-1 is retained after 500 cycles at high current density of 1000 mA g-1 at 60℃. This new preparation process not only simplifies the preparation process and makes it greener, but also significantly improves the battery performance, providing new possibilities for the preparation of high-performance low-cost lithium-ion battery electrodes. © 2023, The Authors. All rights reserved.

关键词： Solvents

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Pulse-potential electrochemistry to boost real-life application of pseudocapacitive dual-doped polypyrrole

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SmartMat 2022年第4期3卷 644-656页

作者： Fang-Fang Sun Wen-Han Li Zi-Hang Huang Wenping Sun Yuhai Dou Ding Yuan Baohua Jia Tianyi Ma Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials Institute of Clean Energy ChemistryCollege of ChemistryLiaoning UniversityShenyangChina School of Science RMIT UniversityMelbourneVictoriaAustralia School of Materials Science and Engineering State Key Laboratory of Clean Energy UtilizationZhejiang UniversityHangzhouChina Shandong Institute of Advanced Technology JinanChina Institute for Superconducting&Electronic Materials University of WollongongWollongongAustralia

Polypyrrole(PPy)is a very promising pseudocapacitive electrode material for ***,the poor electrochemical performances and cycling stability caused by volumetric change and counterion drain severely limited its practical application and ***,we present a pulsepotential polymerization strategy for uniformly depositing a dual-doped PPy with ordered and shorter molecular structure by balancing the concentration *** a strategy ensures more homogeneous stress distribution of PPy during ultralong cycling tests and improves the cycle ***,the pulse-potential polymerized PPy with dual anion doping behavior induces enhanced protonation level and improved electrical conductivity,which boosting the charge transfer ***,the as-synthesized PPy exhibits a remarkable capacitance performance(7250 mF/cm^(2)@3 mA/cm^(2)),outstanding rate capability(3073 mF/cm^(2)@200 mA/cm^(2))and a long cycle *** assembled symmetric and asymmetric supercapacitors(ASC)exhibit good energy densities(0.8 mWh/cm^(2) for ASC and 0.5 mWh/cm^(2) for symmetric supercapacitor),and excellent durability with zero capacitive loss after 35,000 *** addition,we have fabricated small pouch devices,which can effectively operate a variety of electronic products(including the high-voltage 5 V smartphone,and tablet)and well withstand the external extreme tests during operation,demonstrating the quantitative investigation of the real-life application of aqueous supercapacitors.

关键词： dual-doping energy storage polypyrrole pouch-type device pseudocapacitive pulse-potential polymerization

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Elevating the d-Band Center of Ni3S2Nanosheets by Fe Incorporation to Boost the Oxygen Evolution Reaction

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Langmuir 2023年第15期39卷 5375-5383页

作者： Jie Ying Zhen-Zhao He Jiang-Bo Chen Yu-Xuan Xiao Xiao-Yu Yang School of Chemical Engineering and Technology Sun Yat-sen University Zhuhai 519082 China State Key Laboratory Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in Pilot National Laboratory for Marine Science and Technology (Qingdao) Wuhan University of Technology 122 Luoshi Road Wuhan 430070 China

Many attempts have been made to enhance the relatively poor electrochemical activity of Ni3S2 for the oxygen evolution reaction (OER) by elevating the d-band center. Unfortunately, only limited suc...

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Surface-assembled highly flexible Na_(3)(VOPO_(4))_(2)F nanocube cathode for high-rate binder-free Na-ion batteries

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Chinese Chemical Letters 2021年第2期32卷 826-829页

作者： Bohua Deng Ning Yue Haoyang Dong Qiuyue Gui Liang Xiao Jinping Liu School of Chemistry Chemical Engineering and Life ScienceWuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology.Wuhan 430070China Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of EducationSchool of Physics and Electronic EngineeringHarbin Normal UniversityHarbin 150025China

Flexible Na-ion storage cathodes are still very few due to the challenge in achieving both reliable mechanical flexibility and excellent electrochemical ***,a new type of flexible Na_(3)(VOPO_(4))_(2)F cathode with nanocubes tightly assembled on carbon cloth is fabricated by a facile solvothe rmal method for the first *** cathode is able to exhibit superior rate capability and stable cycling performa nce up to 1000 cycles,due to the surface-assembling of crystalline nanocubes on carbon *** addition,it shows good mechanical flexibility,nearly no capacity decay is observed after continuous bending of 500 *** this novel cathode and a directly-grown Na_(2)Ti_(2)O_(5) anode,a fully binde r-free Na-ion battery is *** can deliver a high wo rking voltage and increased gravimetric energy/power densities(maximum values:220.2 Wh/kg;5674,7 W/kg),and can power a LED indicator at bending angles fro m 0° to 180°.

关键词： Flexible cathode Na_(3)(VOPO_(4))_(2)F Nanocube Surface-assembling Sodium-ion battery

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Boosting the Antioxidant Efficiency of Ce(Iii)-Based Organometallic Complexes Via Ion-Limited Domain and Electronic Structure Modulation Towards Robust Proton Exchange Membrane Fuel Cells

SSRN

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SSRN 2023年

作者： Zhao, Shengqiu Liao, Yucong Wang, Rui Li, Hao Zhang, Haining Tang, Haolin State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory The Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen Valley Foshan528200 China

Ce-based radical scavengers, including free Ce3+, are highly efficient radical scavengers with rapid and regenerative redox properties that can enhance the chemical durability of prton exchange membranes (PEMs). However, during the proton exchange membrane fuel cell (PEMFC) operation, water-soluble free Ce3+ ions in PEMs irreversibly migrate away and poison the proton-conducting ion clusters, leading to a decline in PEMFC output power. Herein, organometallic complexes of Ce3+ ions (Ce/HMCRE) derived by Ce3+ ions coordinating with 2-hydroxymethyl-15-crown-5 ether (HMCRE) ligands were utilized as FRS for improving the stability of PEMs. Owing to the coordination between the crown ether oxygen atom of the ligand and the Ce3+, the migration of Ce3+ and the adverse interactions among Ce3+ ions with the sulfonic group of PEM was inhibited. Meanwhile, the formation of coordination bonds allows the central Ce3+ ion to accept electrons on the ligand oxygen atom, thus enhancing the antioxidant efficiency of Ce/HMCRE. Gratifyingly, the hydrogen bonding between the hydroxymethyl group of the HMCRE ligand and the ether oxygen atom on the side chain of the perfluorosulfonic acid (PFSA) matrix also contributes to anchoring the Ce/HMCRE complex and mitigating its interference with ion clusters of PEM. Consequently, the Ce/HMCRE-based hybrid PEMs demonstrated an OCV decay rate of 0.45 mV h-1, a maximum power density of 1.07 W cm-2, an H2 crossover value of 2.41 mA cm-2, a thickness retention of 92% after 150 hours of accelerated degradation testing. © 2023, The Authors. All rights reserved.

关键词： Ligands

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Polyphenol Synergistic Cerium Oxide Surface Engineering Constructed Core-Shell Nanostructures as Antioxidants for Durable and High-Performance Proton Exchange Membrane Fuel Cells

SSRN

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SSRN 2023年

作者： Tang, Haolin Zhao, Shengqiu Liao, Yucong Wang, Rui Liu, Guoliang Zhang, Haining State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory The Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen Valley Foshan528200 China

The chemical degradation of proton exchange membranes (PEMs) suffering from radical attack is a crucial issue in the development of proton exchange membrane fuel cells (PEMFCs), while incorporating cerium oxide (CeO2) nanoparticles (NPs) with regenerative redox properties to eliminate radicals could effectively alleviate degradation. However, the low stability and restricted activity of CeO2 in the PEMFC operating condition and the poor compatibility with PEM due to CeO2 agglomeration stimulate the urgency for structural modulation of CeO2. Herein, polyphenols surface functionalized CeO2 core-shell structure (CeO2@TP) were constructed via assembling oxidation-induced coupling tea polyphenols (TP) on CeO2 NPs. The TP oligomeric shell as a protective layer enhances the stability of CeO2, mitigating radical scavenging activity degradation and improving compatibility with PEMs. Gratifyingly, the phenolic hydroxyl-rich reductive TP oligomeric shell accelerates the regeneration of Ce(IV) to Ce(III), increasing the proportion of Ce(III) and oxygen vacancies on the CeO2 surface, thus boosting antioxidation efficiency. As a result, the CeO2@TP-based PEMs exhibited an OCV decay rate of 0.22 mV h-1, a maximum power density of 1.06 W cm-2, an H2 crossover value of 2.18 mA cm-2, thickness retention (91.1%), and negligible Ce migration after 404 hours of accelerated degradation testing. © 2023, The Authors. All rights reserved.

关键词： Oligomers

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Boosting oxygen evolution of LiCoO2 electrocatalysts via lithium defect

Materials Today Catalysis

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materials Today Catalysis 2025年 8卷

作者： Li, Huamei Li, Mengyuan Liao, Lingling Yang, Han Xiang, Kun Luo, Guoqiang Xie, Mingjiang School of Chemistry and Environmental Engineering Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education Wuhan Institute of Technology Wuhan430205 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Hubei Key Lab for Processing and Application of Catalytic Materials College of Chemical Engineering Huanggang Normal University Huanggang438000 China

The challenge of the complex oxygen evolution reaction (OER) currently impedes the efficient production of hydrogen via electrolytic water splitting. To address this issue, the development and improvement of effective electrocatalysts are required. LiCoO2, a key material in lithium-ion batteries, has shown promising potential as an electrocatalyst for electrochemical energy conversion. However, OER catalysts derived from LiCoO2 have faced obstacles such as high overpotential and a complicated preparation process. In this study, the preparation method is adjusted to optimize the synthesis of Li1-xCoO2 with a defective structure, resulting in an impressive overpotential of only 290 mV at a current density of 100 mA cm−2 and a remarkable Tafel slope of 15.2 mV dec−1. The exceptional catalytic activity of Li1-xCoO2 can be attributed to the absence of Li, which triggers oxidative alterations in the electronic structure of Co. Density functional theory (DFT) calculations reveal that Li defects can influence the d-band center of active Co sites, enhancing the adsorption capabilities of Co sites towards *OOH intermediates and increasing the conductivity of the electrocatalyst during the OER process. These alterations improve the velocity of the crucial step in the reaction, ultimately boosting the catalyst's overall performance and efficiency. © 2024 The Authors

关键词： Lithium-ion batteries

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Conductive ionic liquid/chitosan hydrogels for neuronal cell differentiation

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Engineered Regeneration 2022年第1期3卷 1-12页

作者： Wenwu Wang Likun Chang Yichun Shao Dan Yu Jayanti Parajuli Chao Xu Guoliang Ying Ali K.Yetisen Yixia Yin Nan Jiang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China College of Life Science and Technology Huazhong University of Science and Technology Wuhan 430074 China West China School of Basic Medical Sciences&Forensic Medicine Sichuan UniversityChengdu 610041China Department of Chemical Engineering Imperial College LondonLondon SW72AZUK

To regulate cell behaviors and promote nerve function recovery,three-dimensional(3D)conductive hydrogel can transmit intercellular electrical signals,and effectively provide the cell survival ***,produc-ing hydrogels with simultaneous high conductivity,favorable biocompatibility,and tissue-matching properties remains a challenge for spinal cord injury(SCI)***,a conductive,multifunctional,and biocompati-ble VPImBF4 ionic liquid(IL)with photosensitive chitosan-based hydrogel(pCM@IL)is *** pCM@IL hydrogel exhibits a 3D microporous structure that could maintain cell viability and improve cell ***-tic modulus,conductivity,and biodegradability of the pCM@IL hydrogels are investigated with tissue-matching mechanical *** pCM@IL conductive hydrogels synergistically enhance neuronal cell proliferation and promote neuronal cells differentiation via upregulates synapse gene(Tubulin𝛽3,GAP43,Synaptophysin)***,in vivo studies of the pCM@IL conductive hydrogels as implants demonstrate low-inflammation and neovascularize promotion and appropriate biodegradable *** developed pCM@IL conductive hydrogel is a promising therapeutic scaffold biomaterial for SCI repair.

关键词： Ionic liquid Chitosan conductive hydrogels Neural differentiation Spinal cord injury

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Confined Tuning of the Charge Distribution of Pt Electrocatalyst for Reinforcing Anti-Poisoning Ability: Toward Efficient Separation of Hydrogen from Gases Containing Ammonia

SSRN

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SSRN 2023年

作者： Jin, Changqing Wu, Fanglin Tang, Haibo Pan, Hongfei Chen, Zhida Wang, Rui Meng, Zihan Li, Junsheng Tang, Haolin State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science Technology Guangdong Laboratory Xianhu Hydrogen Valley Foshan528200 China

The development of catalysts for hydrogen oxidation reaction (HOR) with enhanced resistance to ammonia poisoning is an important factor in the practical application of hydrogen electrochemical purification devices (HEPDs). This paper reports on the creation of a highly active and anti-ammonia HOR catalyst developed by tuning the charge distribution of the support material through nitrogen-doping of carbon. The nitrogen-doped carbon-supported platinum catalyst (Pt-N2/KB, 2.03 wt.% Pt) achieves a high mass activity and exchange current density of 2788 mA mgpt-1 and 1020 mA mgpt-1, respectively, which are 5.4 and 4.7 times higher than that of the comm. 20% Pt/C. The Pt-N2/KB catalyst also displays a lower percentage of current decay and enhanced electrochemical stability, indicating superior anti-ammonia toxicity in the tests with HEPD. Density functional theory (DFT) calculations reveal that the hydrogen adsorption free energy (ΔGH*) on the surface of Pt-N2/KB is close to zero and has a lower ammonia adsorption energy, thus accounting for its superior HOR activity and anti- ammonia poisoning ability. Consequently, this work facilitates the implementation of HOR catalysts for anti-ammonia poisoning in the HEPDs, thus accelerating the advancement of ammonia cracking for hydrogen production. © 2023, The Authors. All rights reserved.

关键词： Ammonia

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Manipulating micro-electric field and coordination-saturated site configuration boosted activity and safety of frustrated single-atom Cu/O Lewis pair for acetylene hydrochlorination

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Nano Research 2023年第7期16卷 9039-9049页

作者： Junchen Peng Dandan Dong Zongyuan Wang Hong Yang Dongyang Qiao Qinqin Wang Wei Sun Minmin Liu Jiajun Wang Mingyuan Zhu Bin Dai Fei He Chaofeng Huang School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering Shihezi UniversityShihezi 832000China School of Chemistry and Chemical Engineering Southeast UniversityNanjing 211189China School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China College of Chemistry&Chemical Engineering Yantai UniversityYantai 264010China School of Material Science and Engineering University of JinanJinan 250022China

Simultaneously boosting acetylene hydrochlorination activity and avoiding formation of explosive copper acetylide over Cu-based catalyst,which represented a promising alternative to Hg-based and noble metal catalysts,remained ***,we fabricated a frustrated single-atom Cu/O Lewis pair catalyst(Cu/O-FLP)by coupling epoxide group(C-O-C)with atomdispersed Cu-cis-N_(2)C_(2)Cl center to address this *** basic epoxy site modulated the electron-deficient state of Lewisacidic Cu center and paired with the Cu-cis-N_(2)C_(2)Cl moiety to preferentially break HCl into different electronegative Cu-Clδ-and C-O-H^(δ+)intermediates,which further induced both an extra localized electric field to polarize acetylene and a upshift of the dband center of catalyst,thereby promoting adsorption and enrichment of acetylene by enhancing the dipolar interaction between acetylene and active ***,the generated Cu-Clδ-and C-O-H^(δ+)drastically reduced the energy barrier of ratelimiting step and made vinyl chloride easier to desorb from the Lewis-basic oxygen-atom site rather than traditional Lewis-acidic Cu *** superiorities ensured a higher activity of Cu/O-FLP compared with its ***,preferential dissociation of HCl endowed single-atom Cu with the coordination-saturated configuration,which impeded formation of explosive copper acetylide by avoiding the direct interaction between Cu and acetylene,ensuring the intrinsic safety during catalysis.

关键词： acetylene hydrochlorination Lewis pair single-atom Cu site configuration electric field

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