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Nitrogen-doped porous carbon nanosheets as both anode and cathode for advanced potassium-ion hybrid capacitors

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Green Energy & Environment 2023年第2期8卷 579-588页

作者： Quanzhou Du Yuhua Zhao Yujuan Chen Jianming Liu Huanhuan Li Guangyue Bai Kelei Zhuo Jianji Wang Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals Key Laboratory of Green Chemical Media and ReactionsMinistry of EducationSchool of Chemistry and Chemical EngineeringHenan Normal UniversityXinxiangHenan453007China

Potassium-ion hybrid capacitors(PIHCs)as a burgeoning research hotspot are an ideal replacement for lithium-ion hybrid capacitors(LIHCs).Here,we report nitrogen-doped porous carbon nanosheets(NPCNs)with enlarged interlayer spacing,abundant defects,and favorable mesoporous *** structural changes of NPCNs in potassiation and depotassiation processes are analyzed by using Raman spectroscopy and transmission electron *** to the unique structure of NPCNs,the PIHC device assembled using NPCNs as both the anode and cathode material(double-functional self-matching material)exhibits a superior energy density of 128 Wh kg^(-1)with a capacity retention of 90.8%after 9000 *** research can promote the development of double-functional self-matching materials for hybrid energy storage devices with ultra-high performance.

关键词： Potassium-ion porous carbon Hybrid capacitor Energy storage Nitrogen-doping

Boron-doped lamellar porous carbon supported copper catalyst for dimethyl oxalate hydrogenation

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Chinese Journal of Chemical Engineering 2023年第3期55卷 222-229页

作者： Peipei Ai Li Zhang Jinchi Niu Huiqing Jin Wei Huang State Key Laboratory of Clean and Efficient Coal Utilization Taiyuan University of TechnologyTaiyuan 030024China

Doping heteroatoms on carbon materials could bring some special advantages for using as catalyst *** this work, a boron doped lamellar porous carbon(B-LPC) was prepared facilely and utilized as carbonbased support to construct Cu/B-LPC catalyst for dimethyl oxalate(DMO) hydrogenation. Doping boron could make the B-LPC own more defects on surface and bigger pore size than B-free LPC, which were beneficial to disperse and anchor Cu nanoparticles. Moreover, the interaction between Cu species and B-LPC could be strengthened by the doped B, which not only stabilized the Cu nanoparticles, but also tuned the valence of Cu species to maintain more Cu^(+). Therefore, the B-doped Cu/B-LPC catalyst exhibited stronger hydrogenation ability and obtained higher alcohols selectivity than Cu/LPC, as well as high stability without decrease of DMO conversion and ethylene glycol selectivity even after 300 h of reaction at 240℃.

关键词： Hydrogenation Cu-based catalyst Boron doping porous carbon Catalyst support Alcohol

Binary doping of nitrogen and phosphorus into porous carbon: A novel di-functional material for enhancing CO_(2) capture and super-capacitance

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Journal of Materials Science & Technology 2022年第4期99卷 73-81页

作者： Yuan Wang Jianfei Xiao Hanzhi Wang Tian C.Zhang Shaojun Yuan Low-carbon Technology&Chemical Reaction Engineering Lab College of Chemical EngineeringSichuan UniversityChengdu 610065China Civil&Environmental Engineering Department University of Nebraska-LincolnOmahaNE 68182-0178USA

Designing of hetero-atomic doped carbon-based systems through pyrolysis of abundant element organic precursors is a novel approach to construct rational porous carbon ***,a highly-cross-linked triazine polymer is employed to fabricate N,P co-doped porous carbon(A-TDP-12)with tunable active nitrogen in the carbon framework for simultaneous enhancement of CO_(2) capture capability and Supercapacitance(SC).The synthesized A-TDP-12 possesses a typical hierarchically porous framework(micro-pores and meso-pores)with a large surface area(1332 m^(2) g^(-1))and a rich content of N(7.89 at.%)and P(0.74 at.%).It delivers a CO_(2) adsorption capacity of 1.52 and 5.68 mmol g^(-1) at 1 and 5 bar,respectively,with almost no decay after successive 8 *** 6 M KOH aqueous electrolyte,A-TDP-12 exhibits a superior specific capacitance of 172.7 F g^(-1) at a current density of 1 A g^(-1).Even at a high current density of 10 A g^(-1),80%of its initial capacity still *** work not only offers a novel strategy for fabricating promising adsorbents and electrodes for CO_(2) uptake and SCs,but also provides new insights into design of porous carbon material for related applications.

关键词： N,P co-doping porous carbon CO_(2)capture Super-capacitors Bi-function

Pyridinic nitrogen enriched porous carbon derived from bimetal organic frameworks for high capacity zinc ion hybrid capacitors with remarkable rate capability

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Journal of Energy Chemistry 2021年第5期30卷 404-411页

作者： Yao Li Pengfei Lu Ping Shang Lisha Wu Xiao Wang Yanfeng Dong Ronghuan He Zhong-Shuai Wu Department of Chemistry College of SciencesNortheastern UniversityShenyang 110819LiaoningChina State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina State Key Lab of Fine Chemicals Dalian University of TechnologyDalian 116024LiaoningChina CAS Key Laboratory of carbon Materials Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001ShanxiChina Dalian National Laboratory for Clean Energy Chinese Academy of SciencesDalian 116023LiaoningChina

Aqueous zinc ion hybrid capacitors(ZIHCs)hold great potential for large-scale energy storage applications owing to their high safety and low cost,but suffer from low capacity and energy ***,pyridinic nitrogen enriched porous carbon(nPC)was successfully synthesized via the growth,subsequent annealing and acid etching of bimetal organic frameworks for high capacity and safe ZIHCs with exceptional rate *** from the mesopores for easy ion diffusion,high electrical conductivity enabled by in-situ grown carbon nanotubes matrix and residual metal Co nanoparticles for fast electron transfer,sufficient micropores and high N content(8.9 at%)with dominated pyridinic N(54%)for enhanced zinc ion storage,the resulting nPC cathodes for ZIHCs achieved high capacities of 302 and137 m Ah g^(-1) at 1 and 18 A g^(-1),outperforming most reported carbon based *** results further disclosed that pyridinic N possessed larger binding energy of-4.99 eV to chemically coordinate with Zn2+than other N ***,quasi-solid-state ZIHCs with gelatin based gel electrolytes exhibited high energy density of 157.6 Wh kg^(-1) at 0.69 kW kg^(-1),high safety and mechanical flexibility to withstand mechanical deformation and *** strategy of developing pyridinic nitrogen enriched porous carbon will pave a new avenue to construct safe ZIHCs with high energy densities.

关键词： Zinc ion hybrid capacitors Nitrogen doping porous carbon Metal organic frameworks High capacity

Synthesis of micro/meso porous carbon for ultrahigh hydrogen adsorption using cross-linked polyaspartic acid

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Frontiers of Chemical Science and Engineering 2020年第5期14卷 857-867页

作者： Jun Wei Jianbo Zhao Di Cai Wenqiang Ren Hui Cao Tianwei Tan National Energy Research and Development Center for Biorefinery Beijing University of Chemical TechnologyBejing 100029China Engineering Laboratory of Chemical Resources Utilization in South Xinjiang of Xinjiang Production and Construction Corps College of Life SciencesTarim UniversityAlar 843300China Research Center for Eco-Environmental Sciences Chinese Academy of ScienceBejing 100085China

In addition to the specific surface area,surface topography and characteristics such as the pore size,pore size distribution,and micro/mesopores ratio are factors that determine the performance of porous carbons(PCs)in the fields of energy,catalysis,and *** on the mechanism of weight loss of polyaspartic acid at high temperatures,this study provided a new method for adjusting the surface morphology of PCs by changing the cross-linking ratio of the precursor,where cross-linked polyaspartic acid was used as precursor without additional activating agents.N2 adsorption analysis indicated that the specific surface area of the obtained PCs was as high as 1458 m2·g-1,of which I 200 m2·g-1was the contribution of the microporous area and the highest pore volume was 1.13 cm3·g-1,of which the micropore volume was 0.636cm3·*** thermogravimetric analysis results of the precursor,and also the scanning electron microscopy and Brunauer-Emmet-Teller analysis results of the carboniza-tion product confirmed that the prepared PCs presented multilevel pore structure,and the diameters of most pores were 0.78 and 3.97 nm;moreover,the pore size distribution was relatively *** conferred the PCs the ultrahigh hydrogen adsorption capacity of up to 4.52 wt-%at 77 K and 1.13 bar,in addition to their great energy storage and catalytic potental.

关键词： porous carbon multilevel pores polyaspartic acid cross-linking hydrogen adsorption

Multi-heteroatom doped porous carbon derived from insect feces for capacitance-enhanced sodium-ion storage

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Journal of Energy Chemistry 2021年第3期30卷 482-492页

作者： Chen Chen Ying Huang Zhuoyue Meng Zhipeng Xu Panbo Liu Tiehu Li MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072ShaanxiChina College of Chemistry&Chemical Engineering Xi’an University of Science and TechnologyXi’an 710072ShaanxiChina Shaanxi Joint Laboratory of Graphene Northwestern Polytechnical UniversityXi’an 710072ShaanxiChina

The large-scale application of sodium ion batteries(SIBs)is limited by economic and environmental ***,we prepare multi-heteroatom self-doped hierarchical porous carbon(HHPC)with a honeycomb-like structure by one-step carbonization method using high-yield and low-cost biomass silkworm excrement as a *** an anode for SIB,HHPC-1100 exhibits a capacity of 331.7 mA h g^(-1) at 20 mA g^(-1),while it also reveals remarkable rate performance and stable long cycle capability due to its abundant pore structure and proper amount of hetero atom ***,the synergistic effect of O,N,S,P co-doping in carbon materials on sodium ion adsorption is verified by the first-principles study,which provide a theoretical basis for the prominent electrochemical performance of the material.

关键词： Heteroatom doped Anode Biomass Sodium storage porous carbon

Graphene-templated synthesis of sandwich-like porous carbon nanosheets for efficient oxygen reduction reaction in both alkaline and acidic media

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Science China Materials 2018年第7期61卷 915-925页

作者： Tao Wang Jianyu Wang Xu Wang Jia Yang Jianguo Liu Hangxun Xu CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and Engineering University of Science and Technology of ChinaHefei 230026 China National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China

Developing low-cost, high-performance elec- trocatalysts for the oxygen reduction reaction （ORR） is crucial for implementation of fuel cells and metal-air batteries into practical applications. Graphene-based catalysts have been extensively investigated for ORR in alkaline electrolytes. However, their performance in acidic electrolytes still requires further improvement compared to the Pt/C catalyst. Here we report a self-templating approach to prepare graphene-based sandwich-like porous carbon nanosheets for efficient ORR in both alkaline and acidic electrolytes. Graphene oxides were first used to adsorb m-phenylenediamine molecules which can form a nitrogen-rich polymer network after oxidative poly- merization. Then iron （Fe） salt was introduced into the polymer network and transformed into ORR active Fe-N-C sites along with Fe, FeS, and FEN0.05 nanopartides after pyr- olysis, generating ORR active sandwich-like carbon na- nosheets. Due to the presence of multiple ORR active sites. The as-obtained catalyst exhibited prominent ORR activity with a half-wave potential -30 mV more positive than Pt/C in 0.1 mol L-1 KOH, while the half-wave potential of the catalyst was only -40 mV lower than that of commercial Pt/C in 0.1 mol L-1 HClO4. The unique planar sandwich-like structure could expose abundant active sites for ORR. Meanwhile, the graphene layer and porous structure could simultaneously enhance electrical conductivity and facilitate mass transport. The prominent electrocatalytic activity and durability in both alkaline and acidic electrolytes indicate that these carbon na- nosheets hold great potential as alternatives to precious metal- based catalysts, as demonstrated in zinc-air batteries and proton exchange membrane fuel cells.

关键词： oxygen reduction reaction porous carbon na-nosheets fuel cells zinc-air batteries

Embedding amorphous MoS_(x)within hierarchical porous carbon by facile one-pot synthesis for superior sodium ion storage

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Journal of Energy Chemistry 2022年第12期75卷 240-249,I0006页

作者： Jalal Rahmatinejad Xudong Liu Ximeng Zhang Bahareh Raisi Zhibin Ye Department of Chemical and Materials Engineering Concordia UniversityMontrealQuebec H3G 1M8Canada

The design of anode materials with a high specific capacity,high cyclic stability,and superior rate performance is required for the practical applications of sodium-ion batteries(SIBs).In this regard,we introduce in this work a facile,low-cost and scalable method for the synthesis of nanocomposites of amorphous molybdenum sulfide(a-MoS_(x))and hierarchical porous carbon and have systematically investigated their performance for sodium ion *** the synthesis,ammonium molybdate tetrahydrate and thioacetamide are used as molybdenum and sulfur sources,respectively,with abundant corn starch as the carbon source and KOH as an activation agent.A simple pyrolysis of their mixtures leads to the formation of nanocomposites with a-MoS_(x)embedded within a hierarchical porous carbon(MoS_(x)@HPC),which are featured with a high surface area of up to 518.4 m^(2) g^(-1)and hierarchical pores ranging from micropores to *** has also been shown that the annealing of MoS_(x)@HPC results in the formation of crystalline MoS_(2)nanosheets anchored in the hierarchical porous carbon matrix(MoS_(2)@HPC).The as-prepared nanocomposite MoS_(x)@HPC1 at an optimum carbon content of 32 wt%delivers a high specific sodium storage capacity of 599 mAh g^(-1)at 0.2 A g^(-1)and a high-rate performa nce with a retained capacity of 289 mAh g^(-1)at 5 A g^(-1).A comparison of the electrochemical performances of MoS_(x)@HPC and MoS_(2)@HPC demonstrates the superior specific capacity,rate performance,and charge transfer kinetics of the former,highlighting the unique advantageous role of amorphous MoS_(x)relative to crystalline MoS_(2).

关键词： MoS_(x) Anode Sodium-ion battery porous carbon Sodium ion storage

Precise tuning of low-crystalline Sb@Sb_(2)O_(3) confined in 3D porous carbon network for fast and stable potassium ion storage

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Journal of Materials Science & Technology 2021年第35期94卷 123-129页

作者： Qun Ma Lida Song Yuan Wan Kangze Dong Zhiyuan Wang Dan Wang Hongyu Sun Shaohua Luo Yanguo Liu School of Materials Science and Engineering Northeastern UniversityShenyang 110819China School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao 066004China Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province Qinhuangdao 066004China

Metal antimony(Sb)is a promising anode material of potassium-ion batteries(PIBs)for its high theoretical capacity but limited by its inferior cycle stability due to the serious volume expansion during ***,we design and construct a kind of low-crystalline Sb nanoparticles coated with amorphous Sb2O3 and dispersed into three-dimensional porous carbon via a strategy involving NaCl template-assisted insitu pyrolysis and subsequent low-temperature heat-treated in ***,the crystallinity and ratio of Sb/Sb_(2)O_(3) have been precisely tuned and controlled,and the optimized sample of HTSb@Sb_(2)O_(3)@C-4 displays a high reversible specific capacity of 543.9 m Ah g^(-1) at 0.1 A g^(-1),superior rate capability and excellent cycle stability(~273 m Ah g^(-1) at 2 A g^(-1) after 2000 cycles)as an anode of *** outstanding potassium-ion storage performance can be ascribed to the appropriate crystallinity and the multiplebuffer-matrix structure comprising an interconnected porous conductive carbon to relieve the volume changes and suppress the aggregation of Sb,a Sb nanoparticle core to shorten the ion transport pathways and decrease the mechanical stress,and a low-crystalline Sb_(2)O_(3) as the shell to consolidate the interface between Sb and carbon as well as facilitate the rapid electron *** dynamic analysis shows that the composite is mainly controlled by pseudocapacitance *** work provides a novel thought to design high-performance composite electrode in energy storage devices.

关键词： Potassium-ion batteries Anode porous carbon Antimony Antimony oxide