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Precise synthesis of N-doped graphitic carbon via chemical vapor deposition to unravel the dopant functions on potassium storage toward practical K-ion batteries

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Nano Research 2021年第5期14卷 1413-1420页

作者： Yu Zhao Zhongti Sun Yuyang Yi Chen Lu Menglei Wang Zhou Xia Xueyu Lian Zhongfan Liu Jingyu Sun College of Energy Soochow Institute for Energy and Materials InnovationS(SIEMIS)Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou215006China Center for Nanochemistry(CNC) Beijing Science and Engineering Center for NanocarbonsCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing100871China

Nitrogen doped carbon is a burgeoning anode candidate for potassium-ion battery(PIBs)owing to its outstanding attributes.It is imperative to grasp further insight into specific effects of different nitrogen dopants in carbon anode toward advanced K-ion storage.However,the prevailing fabrication method is plagued by the fact that considerable variations in the total N-doping concentration occur in the course of regulating the type of nitrogen dopants,incapable of distinguishing the certain roles of them under similar conditions.Herein,throughout the precise preparation of high edge-N doped carbon(HENC)and high graphitic-N doped carbon(HGNC)harnessing basically identical N-doping levels(5.78 at.%for HENC;5.07 at.%for HGNC)via chemical vapor deposition route,the effects of edge-N and graphitic-N in the carbon anode on K-ion storage are revisited,offering guidance into the design of low-cost and high-performance PIB systems.

关键词： nitrogen doping carbon anode potassium storage adsorption voltage

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Determination of Coke,Pitch and Pores/Cracks in Green anode by Image Analysis

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Journal of Surface Engineered Materials and Advanced Technology 2013年第3期3卷 1-6页

作者： Dipankar Bhattacharyay Duygu Kocaefe Yasar Kocaefe Brigitte Morais University Research Center on Aluminum(CURAL) University of Quebec at ChicoutimiChicoutimiCanada Aluminerie Alouette Inc. Sept-IlesCanada

carbon anodes are an essential part of the primary aluminum production. They are made of coal tar pitch, calcined petroleum coke, recycled anodes and butts. As pitch acts as a binder for the anode, its proper distribution in a green anode has a great impact on the properties of the baked anode. Information on cracks in anodes is important for the quality of the baked anode. There is presently no reliable method available to analyze and quantify the amount of coke, pitch and pores/cracks in a green anode sample. In this article, an image analysis technique has been described, that can analyze as well as quantify the area percentage of pores/cracks and weight percentages of pitch and coke. The novelty of the method is its capacity to differentiate the different components of anode.

关键词： Image Analysis carbon anode Coke Pitch Pore Crack

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