Bifunctional Edge-Rich Nitrogen Doped Porous Carbon for Activating Oxygen and Sulfur

Mengmeng Liu; Xiaohang Zhu; Yujie SongGuanlin HuangJiamin WeiXiaokai SongQi XiaoTao ZhaoWan JiangXiaopeng LiWei Luo

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Bifunctional Edge-Rich Nitrogen Doped Porous Carbon for Activating Oxygen and Sulfur

机译：Bifunctional Edge-Rich Nitrogen Doped Porous Carbon for Activating Oxygen and Sulfur

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Oxygen reduction reaction (ORR) and sulfur reduction reaction (SRR) play keyroles in advanced batteries. However, they both suffer from sluggish reactionkinetics. Here, an interesting nitrogen doped porous carbon material that cansimultaneously activate oxygen and sulfur is reported. The carbon precursoris a nitrogen containing covalent organic framework (COF), constitutingperiodically stacked 2D sheets. The COF structure is well preserved uponpyrolysis, resulting in the formation of edge-rich porous carbon with structureresembling stacked holey graphene. The nitrogen containing groups in theCOF are decomposed into graphitic and pyridinic nitrogen during pyrolysis.These edge sites and uniform nitrogen doping endow the carbon productwith high intrinsic catalytic activities toward ORR and SRR. The COF derivedcarbon delivers outstanding performances when assembling as cathodes inthe Li-S and Li-O_2 batteries. Simultaneous activation of oxygen and sulfuralso enables a new battery chemistry. A proof-of-concept Li-S/O_2 hybridbattery is assembled, delivering a large specific capacity of 2,013 mAh g~(?1).This study may inspire novel battery designs based on oxygen and sulfurchemistry.

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来源
《Advanced functional materials》 |2023年第11期|2213395.1-2213395.10|共10页
作者
Mengmeng Liu; Xiaohang Zhu; Yujie SongGuanlin HuangJiamin WeiXiaokai SongQi XiaoTao ZhaoWan JiangXiaopeng LiWei Luo;
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作者单位

State Key Laboratory for Modification of ChemicalFibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620, P. R. China;

Institute of Advanced Functional Materials for EnergySchool of Chemistry and Chemical EngineeringJiangsu University of TechnologyChangzhou 213001, P. R. China;

State Key Laboratory for Modification of ChemicalFibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620, P. R. China Institute of Functional MaterialsDonghua UniversityShanghai 201620, P. R. China;

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正文语种英语
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bifunctional electrocatalyses; covalent organic frameworks; nitrogen doped carbons; oxygen reduction reactions; sulfur reduction reactions;

Bifunctional Edge-Rich Nitrogen Doped Porous Carbon for Activating Oxygen and Sulfur

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