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Green Energy & Environment 2020年第1期5卷 69-75页

作者： Zhiwei Lu Xiaochao Xu Yujuan Chen Xiaohui Wang Li Sun Kelei Zhuo Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals Key Laboratory of Green Chemical Media and ReactionsMinistry of Education School of Chemistry and Chemical Engineering Henan Normal University

Supercapacitors with unique performance have been widely utilized in many fields. Herein, we report a nitrogen and sulfur co-doped graphene aerogel(N/S-GA-2) prepared using a low toxic precursor for high-performance supercapacitors. The as-obtained material possesses a hierarchically porous structure and a large number of electrochemical active sites. At a current density of 1 Ag^-1, the specific capacitance of the N/S-GA-2 for supercapacitors with the ionic liquid as the electrolyte is 169.4 Fg^-1, and the corresponding energy density is 84.5 Wh kg^-*** a power density of 8.9 k W kg^-1, the energy density can reach up to 75.7 Wh kg^-1, showing that the N/S-GA-2 has an excellent electrochemical performance. Consequently, the N/S-GA-2 can be used as a promising candidate of electrode materials for supercapacitors with high power density and high energy density.

关键词： Graphene aerogel hierarchically porous structure Supercapacitor Ionic liquid

Boosting ethanol oxidation over nickel oxide through construction of quasi-one-dimensional morphology and hierarchically porous structure

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Transactions of Nonferrous Metals Society of China 2020年第6期30卷 1615-1624页

作者： Jing ZHAN Ze-lin MIAO Meng CAI Qi-hou LI School of Metallurgy and Environment Central South UniversityChangsha 410083China National Engineering Laboratory for High Efficiency Recovery of Refractory Nonferrous Metals Resources Changsha 410083China

Quasi-one-dimensional NiO with a hierarchically porous structure was synthesized through a facile coordination−precipitation method with the coupling effect of ammonia and a post-calcination *** electrocatalytic properties of NiO fibers for the oxidation of ethanol were compared with those of NiO *** results show that the fibrous NiO possesses a larger specific surface area of 140.153 m2/g and a lower electrical resistivity of 4.5×105Ω·m,leading to an impressively superior electrocatalytic activity to spherical NiO for ethanol oxidation in alkaline *** current decay on fibrous NiO at 0.6 V in 100−900 s was 0.00003%,which is much lower than that of spherical NiO,indicating its better *** unique morphology and hierarchically porous structure give the fibrous NiO great potential to be used as an anodic electrocatalyst for direct ethanol fuel cells.

关键词： hierarchically porous structure nickel oxide ethanol oxidation quasi-one-dimensional morphology

A Facile Post-Process Method to Enhance Crystallization Quality and Electrochemical Properties of SnO2/Graphene Composites with Three-Dimensional hierarchically porous structure

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A Facile Post-Process Method to Enhance Crystallization Qual...

Hierarchical porous hard carbon enables integral solid electrolyte interphase as robust anode for sodium-ion batteries

河南省化学会2016年学术年会

作者： Fei Tian Xiaobing Wang Zhenyu Chen Yuming Guo Huijun Liang Zhansheng Lu Dong Wang Kui Wang Xiangdong Lou Bibo Cai Lin Yang Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals Key Laboratory of Green Chemical Media and Reactions Ministry of Education School of Chemistry and Chemical Engineering Henan Normal University

Although many studies have confirmed that SnO/graphene(SnO/r GO) composites could be facile synthesized by SnCl·HO and graphene oxide, the as-prepared SnO/r GO remained highly resistive and volume expansion, and limiting its applications in lithium ion batteries. In this work, three SnO/r GO composites with three-dimensional hierarchically porous structure were synthesized via freeze drying and different calcinating temperature in air atmosphere. The results showed that the electrical conductivity of SnO/r GO composites and the crystallization quality of SnO and r GO could be enhanced by a calcinating process at 120 ℃ in air atmosphere. During the charge/discharge process, the volume expansion of SnO nanoparticles could be prevented through enhancing crystallization quality of ultra-small nanoparticles size(about 3.2 nm). In addition, the XPS results showed that SnO nanoparticles were anchored on the surface of r GO via Sn-O-C bonds. The cycling performances of as-prepared SnO/r GO composites showed that the sample of 120 ℃ was the best. Its initial discharge capacity is 1610 m A h g at current densities of 0.5 *** 100 cycles, the specific discharge capacity is 429 mA h g. This might pave the way for the commercial production of the SnO/r GO electrode because these post-processing technologies are more easily implemented in industrial production.

关键词： SnO2 /graphene Low-temperature calcinating hierarchically porous structure Electrochemical property

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Rare Metals 2020年第9期39卷 1053-1062页

作者： Xu-Kun Wang Juan Shi Li-Wei Mi Yun-Pu Zhai Ji-Yu Zhang Xiang-Ming Feng Zi-Jie Wu Wei-Hua Chen Green Catalysis Center College of ChemistryZhengzhou UniversityZhengzhou 450001China Center of Advanced Materials Research Zhongyuan University of TechnologyZhengzhou 450007China Northwest Composites Center Department of MaterialsUniversity of ManchesterManchester M139PLUK

Hard carbon is the most promising anode for sodium-ion battery applications due to the wide availability and low work ***,it often delivers worse electrochemical performance in ester-based ***,a hierarchically porous loose sponge-like hard carbon with a highly disordered phase,prepared from the biomass of platanus bark,exhibits superior rate performance with a capacity of 165 mAh·g-1 at a high current of1 A·g-1,and high retention of 71.5%after 2000 cycles in an ester-based *** effect of the hierarchically porous loose sponge-like structure on the formation dynamics of solid electrolyte interphase(SEI),and related properties,was studied via cyclic voltammetry(CV),galvanostatic intermittent titration technique(GITT),X-ray photoelectron spectroscope(XPS),Fourier transform infrared spectroscopy(FTIR)and electrochemical impedance spectroscopy(EIS)*** results reveal that the hierarchically porous structure can construct continued connecting channels and accelerate the electrolyte transport,which is beneficial to the reaction kinetics of ***,the mesoporous structure is conducive to good contact between electrolyte and materials and shortens the Na+diffusion path,which in turn facilitates the charge transfer kinetics in the material.

关键词： Sodium-ion battery Hard carbon hierarchically porous structure SEI Ester-based electrolyte

The state-of-the-art synthetic strategies for SAPO-34 zeolite catalysts in methanol-to-olefin conversion

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National Science Review 2018年第4期5卷 542-558页

作者： Qiming Sun Zaiku Xie Jihong Yu State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University International Center of Future Science Jilin University SINOPEC Corporation Science and Technology Development Department

Methanol-to-olefin(MTO)conversion has proven to be one of the most successful non-petrochemical routes for producing light ***(SAPO)zeolite SAPO-34 is one of the best industrial catalysts for MTO conversion,but suffers from rapid deactivation due to the inherent diffusion bottleneck limited by the narrow eight-ring pore *** improve the MTO performance,considerable synthetic efforts have been devoted to decrease the crystal size of zeolites or introduce secondary larger pores in zeolite crystals to form hierarchical *** review mainly focuses on presenting the state-of-the-art synthetic strategies for nanosized and hierarchical SAPO-34 catalysts with excellent MTO ***,the industrialization of SAPO-34 catalysts for the MTO reaction,and some current problems and future prospects for the synthesis of SAPO-34 catalysts,are also pointed *** expect that this review can not only shed some light on the preparation of SAPO-34 catalysts,but also stimulate the future development of high-performance SAPO-34 catalysts to meet the increasing demands of the chemical industry.

关键词： methanol-to-olefin zeolites SAPO-34 hierarchically porous structure nanocrystals heterogeneous catalysis

Self-supporting and hierarchically porous Ni_(x)Fe-S/NiFe_(2)O_(4) heterostructure as a bifunctional electrocatalyst for fluctuating overall water splitting

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International Journal of Minerals,Metallurgy and Materials 2022年第5期29卷 1120-1131页

作者： Wenjing Yan Jintao Zhang Aijing Lü Songle Lu Yiwei Zhong Mingyong Wang State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory of Green Recovery and Extraction of Rare and Precious Metals University of Science and Technology BeijingBeijing 100083China

Stable non-noble metal bifunctional electrocatalysts are one of the challenges to the fluctuating overall water splitting driven by re-newable ***,a novel self-supporting hierarchically porous Ni_(x)Fe-S/NiFe_(2)O_(4) heterostructure as bifunctional electrocatalyst was constructed based on porous Ni-Fe electrodeposition on three-dimensional(3D)carbon fiber cloth,in situ oxidation,and chemical *** showed that the Ni_(x)Fe-S/NiFe_(2)O_(4) heterostructure with a large specific surface area exhibits good bifunctional activity and stability for both hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)because of the abundance of active sites,synergistic effect of the heterostructure,superhydrophilic surface,and stable,self-supporting *** results further confirmed that the Ni_(x)Fe-S phase in the heterostructure is transformed into metal oxides/hydroxides and Ni_(3)S_(2) during *** with the commercial 20wt%Pt/C||IrO_(2)-Ta_(2)O_(5) electrolyzer,the self-supporting Ni1/5Fe-S/NiFe_(2)O_(4)||Ni1/2Fe-S/NiFe_(2)O_(4) electrolyzer exhibits better stability and lower cell voltage in the fluctu-ating current density range of 10-500 mA/cm^(2).Particularly,the cell voltage of Ni1/5Fe-S/NiFe_(2)O_(4)||Ni1/2Fe-S/NiFe_(2)O_(4) is only approximately 3.91 V at an industrial current density of 500 mA/cm^(2),which is lower than that of the 20wt%Pt/C||IrO_(2)-Ta_(2)O_(5) electrolyzer(i.e.,approximately 4.79 V).This work provides a promising strategy to develop excellent bifunctional electrocatalysts for fluctuating overall water splitting.

关键词： self-supporting hierarchically porous structure heterostructure bifunctional catalyst overall water splitting

hierarchically porous Co@N-doped carbon fiber assembled by MOF-derived hollow polyhedrons enables effective electronic/mass transport:An advanced 1D oxygen reduction catalyst for Zn-air battery

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Journal of Energy Chemistry 2023年第1期76卷 117-126,I0004页

作者： Yifei Zhang Quanfeng He Zihao Chen Yuqing Chi Junwei Sun Ding Yuan Lixue Zhang Industrial Research Institute of Nonwovens&Technical Textiles College of Textiles&ClothingQingdao UniversityQingdao 266071ShandongChina College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071ShandongChina College of Chemistry and Chemical Engineering Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM)Xiamen UniversityXiamen 361005FujianChina

Developing advanced oxygen reduction reaction(ORR)electrocatalysts with rapid mass/electron transport as well as conducting relevant kinetics investigations is essential for energy technologies,but both still face ongoing ***,a facile approach was reported for achieving the highly dispersed Co nanoparticles anchored hierarchically porous N-doped carbon fibers(Co@N-HPCFs),which were assembled by core-shell MOFs-derived hollow ***,the unique one-dimensional(1D)carbon fibers with hierarchical porosity can effectively improve the exposure of active sites and facilitate the electron transfer and mass transfer,resulting in the enhanced reaction *** a result,the ORR performance of the optimal Co@N-HPCF catalysts remarkably outperforms that of commercial Pt/C in alkaline solution,reaching a limited diffusion current density(J)of 5.85 m A cm^(-2)and a half-wave potential(E_(1/2))of 0.831 ***,the prepared Co@N-HPCF catalysts can be used as an excellent air-cathode for liquid/solid-state Zn-air batteries,exhibiting great potentiality in portable/wearable energy ***,the reaction kinetic during ORR process is deeply explored by finite element simulation,so as to intuitively grasp the kinetic control region,diffusion control region,and mixing control region of the ORR process,and accurately obtain the relevant kinetic *** work offers an effective strategy and a reliable theoretical basis for the engineering of first-class ORR electrocatalysts with fast electronic/mass transport.

关键词： Oxygen reduction catalyst Metal-organic frameworks Carbon nanofiber hierarchically porous structure Diffusion kinetics Zn-air battery

Ultrafast Joule heating synthesis of hierarchically porous graphene-based Co-N-C single-atom monoliths

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Nano Research 2022年第5期15卷 3913-3919页

作者： Lingli Xing Rui Liu Zhichao Gong Jingjing Liu Jianbin Liu Haisheng Gong Kang Huang Huilong Fei Advanced Catalytic Engineering Research Center of the Ministry of Education State Key Laboratory for Chemo/Biosensing and Chemometricsand College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China

Herein,we develop a transient heating-quenching strategy triggered by Joule heating for the synthesis of single-atom cobalt-and nitrogen-doped graphene materials with three-dimensional porous monolithic architecture(denoted as CoNG-JH).The ultrafast Joule heating procedure simultaneously enables the reduction of graphene oxide and the incorporation of metal and nitrogen atoms into the graphene matrix within 2-second ***,the transient quenching avoids the extended heating-induced atom aggregation,ensuring the rapid and stable dispersion of atomic-scale CoNx active sites in ***,the interconnected macropores and nanopores formed by the self-assembly of graphene sheets facilitate the unimpeded ion and gas transport during the catalytic *** used as an electrode for the hydrogen evolution reaction(HER),the fabricated free-standing CoNG-JH exhibits high catalytic activity and durability with a low overpotential of 106 mV at 10 mA·cm^(-2) and a small Tafel slope of 66 mV·dec^(-1) in 0.5 M H_(2)SO_(4) *** presented synthesis and design strategy open up a rapid and facile route for the manufacturing of single atom catalysts.

关键词： Joule heating single atom catalysts hierarchically porous structure self-supporting film hydrogen evolution reaction

Cocoon Silk-Derived, hierarchically porous Carbon as Anode for Highly Robust Potassium-Ion Hybrid Capacitors

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Nano-Micro Letters 2020年第9期12卷 83-95页

作者： Haiyan Luo Maoxin Chen Jinhui Cao Meng Zhang Shan Tan Lei Wang Jiang Zhong Hongli Deng Jian Zhu Bingan Lu State Key Laboratory for Chemo/Biosensing and Chemometrics Hunan UniversityChangsha 410082People’s Republic of China College of Chemistry and Chemical Engineering Hunan Key Laboratory of Two‑Dimensional MaterialsHunan UniversityChangsha 410082People’s Republic of China

Potassium-ion hybrid capacitors(KIHCs) have attracted increasing research interest because of the virtues of potassium-ion batteries and *** development of KIHCs is subject to the investigation of applicable K+storage materials which are able to accommodate the relatively large size and high activity of ***,we report a cocoon silk chemistry strategy to synthesize a hierarchically porous nitrogen-doped carbon(SHPNC).The as-prepared SHPNC with high surface area and rich N-doping not only offers highly efficient channels for the fast transport of electrons and K ions during cycling,but also provides sufficient void space to relieve volume expansion of electrode and improves its ***,KIHCs with SHPNC anode and activated carbon cathode afford high energy of 135 Wh kg-1(calculated based on the total mass of anode and cathode),long lifespan,and ultrafast charge/slow discharge *** study defines that the KIHCs show great application prospect in the field of high-performance energy storage devices.

关键词： Potassium-ion hybrid capacitors Biomimetic materials engineering N-doped carbon hierarchically porous structure High energy density

A High Capacity and Working Voltage Potassium-Based Dual Ion Batteries

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Energy & Environmental Materials 2021年第3期4卷 413-420页

作者： Meng Zhang Jiang Zhong Weiqing Kong Lei Wang Tao Wang Huilong Fei Haiyan Luo Jian Zhu Jiawen Hu Bingan Lu School of Chemistry and Chemical Engineering State Key Laboratory for Chemo/Biosensing and Chemometricsand College of ChemistryHunan UniversityChangsha 410082China School of Physics and Electronics Hunan UniversityChangsha 410082China

Potassium-based dual ion batteries(KDIBs)have attracted significant attention owing to high working voltage,high safety,low processing cost,and environmental ***,one great challenge for practical KDIBs is to develop suitable anode materials with high specific ***,we report an architecture of hierarchically porous antimony nanoparticles/carbon nanofibers(HPSb CNFs)as flexible,free-standing anode for high-performance *** HPSb CNFs with hierarchically porous structure,and high-content nitrogen doping,not only offer sufficient free space to tolerate the repetitive volume expansion of Sb nanoparticles during long-term cycling,but also greatly facilitate the transport of electrons and ions within electrode,ensuring high material utilization ***,the KDIBs,constituted by HPSb CNFs-700(calcined at 700°C)anode and graphite cathode,exhibited a high reversible capacity of 440 m Ah g^(-1)with high discharge medium voltage of 4.5 V at a specific current of 200 m A g^(-1)(the highest capacity for all KDIBs normalized by the mass of the anode),and excellent cyclic *** electrochemical reversibility of the KDIBs was further demonstrated by ex situ XRD,ex situ Raman spectrum,and *** results suggest the as-designed HPSb CNFs-700 with highcapacity and long-term cycling stability is a promising anode material for high-performance KDIBs.

关键词： antimony nanoparticles hierarchically porous structure high working voltage potassium dual ion batteries ultra-high capacity