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Interfacial growth of N,s-codoped mesoporous carbon onto biomass-derived carbon for superior potassium-ion storage

Nano Research 2024年第4期17卷 2619-2627页

作者： Na Huang Cheng Tang Hao Jiang Jie sun Aijun Du Haijiao Zhang Institute of Nanochemistry and Nanobiology School of Environmental and Chemical EngineeringShanghai UniversityShanghai 200444China school of Chemistry and Physics and Centre for Materials science Queensland University of TechnologyBrisbaneQLD 4001Australia shanghai Engineering Research Center of Hierarchical Nanomaterials Frontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China

Carbonaceous materials have been recognized as one of the most promising anode materials for potassium-ion batteries(PIBs)due to their abundant raw materials,controllable structure,superior conductivity,and good chemical ***,the large radius of K ions and the low potassium content of intercalation compounds result in the sluggish storage kinetics and low reversible capacity of carbon *** this work,we present a unique heteroatom-doped carbon composite(denoted as Ns-MC/sC)through a facile interfacial assembly route and simple heat-treatment process,where Ns-MC is well grafted onto the biomass-derived spore carbon(sC).This unique structural design endows it with abundant mesoporous channels,expanded layer spacing,and highly doped N and *** these merits,the Ns-MC/sC anode in PIBs exhibits a high reversible capacity of 350.4 mAh·g^(-1) at 100 mA·g^(-1) after 300 cycles,and an outstanding cycling ***,in-situ Raman spectra further verify the high reversibility of K ions insertion/***,theoretical simulations also reveal that the N,s dual-doping is an efficient approach for improving the potassium-ion storage performance of Ns-MC/sC.

关键词： mesoporous carbon(MC) biomass-derived carbon(BC) N s co-doping interfacial assembly potassium-ion batteries(PIBs)

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Ultralong nitrogen/sulfur co-doped carbon nano-hollowsphere chains with encapsulated cobalt nanoparticles for highly efficient oxygen electrocatalysis

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Carbon Energy 2023年第8期5卷 15-30页

作者： Wei Zhang Xingmei Guo cong Li Jiang-Yan Xue Wan-Ying Xu Zheng Niu Hongwei Gu Carl Redshaw Jian-Ping Lang college of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhouChina state Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghaiChina college of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiangChina Department of Chemistry University of HullHullUK

The development of simple and effective strategies to prepare electrocatalysts,which possess unique and stable structures comprised of metal/nonmetallic atoms for oxygen reduction reaction(ORR)and oxygen evolution reaction(OER),is currently an urgent ***,an efficient bifunctional electrocatalyst featured by ultralong N,s-doped carbon nano-hollow-sphere chains about 1300 nm with encapsulated co nanoparticles(co-CNHsCs)is *** multifunctional catalytic properties of co together with the heteroatom-induced charge redistribution(i.e.,modulating the electronic structure of the active site)result in superior catalytic activities toward OER and ORR in alkaline *** optimized catalyst co-CNHsC-3 displays an outstanding electrocatalytic ability for ORR and OER,a high specific capacity of 1023.6 mAh gZn^(-1),and excellent reversibility after 80 h at 10mA cm^(-2)in a Zn-air battery *** work presents a new strategy for the design and synthesis of efficient multifunctional carbon-based catalysts for energy storage and conversion devices.

关键词： co nanoparticles N s co-doping oxygen electrocatalysts rechargeable Zn-air batteries ultralong carbon nano-hollow-sphere chains

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self-assembly fabrication of lignin-derived carbon with dual heteroatoms doping for high-performance supercapacitor

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collagen and Leather 2023年第3期5卷 93-105页

作者： Zehong Chen Haihong Lai Hao Zhuo Yu Lin Zhong Linxin Zhong Xinwen Peng state Key Laboratory of Pulp and Paper Engineering South China University of Technology381 Wushan RoadTianhe DistrictGuangzhou 510641People's Republic of China Department of Mechanical Engineering National University of Singapore3 Engineering Drive 2Singapore 117576Singapore Queensland Micro-and Nanotechnology Centre School of Environment and ScienceGriffith UniversityNathanQLD 4111Australia

Renewable and low-cost biomass is an ideal sustainable alternative to petroleum-based resources,but producing biomass-based carbon electrode with high performances remains a ***,we propose a facile self-assembly strategy to fabricate a biomass-derived N,s co-doping carbon electrode from lignosulfonate without any activation or template *** advantage of the coordination between Fe ions and lignosulfonate,the resultant carbon exhibits a spherical structure with abundant graphitized nanosheets,leading to a high specific surface area with rational pore structure,which are beneficial to the electron/ion transport and *** high contents of doping N(8.47 wt%)and s(2.56 wt%)significantly boost the electrochemical *** a supercapacitor electrode,the carbon material displays high specific capacitance of 390 F g^(-1),excellent cycling stability and high energy density of 14.7 W h kg^(-1)at a power density of 450 W kg^(-1).This study provides a potential strategy for synthesizing cost-effective heteroatom-doped carbon materials from biomass with abundant functional groups and heteroatom sources,such as chitosan,collagen,and gelatin.

关键词： Biomass Lignosulfonate N s co-doping self-assembly supercapacitor

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