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  • 02월 19일 10시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제121회 대한화학회 학술발표회, 총회 및 기기전시회 안내 One-pot and Surfactant-free Assembly of Porous N-doped Carbon Hollow Spheres

2018년 2월 7일 16시 24분 40초
INOR.P-183 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 19일 (목요일) 11:00~12:30
Inorganic Chemistry
저자 및
DI LIU, Jaebeom Lee1,*
Nano Department, Pusan National University, Korea
1Optics and Mechatronics Engineering, Pusan National University, Korea
Porous carbon hollow spheres (PCHS) have wide applications, including catalysis, adsorption, and energy storage/conversion because of their fascinating properties of carbon itself such as cheap, nontoxic, superior chemical stability, and excellent electrical conductivity. Besides, their typical hierarchical structures of hollow porous cores with an ion-permeable porous shell could effectively increase the specific surface areas and enhance the diffusion of electrolytes, thus improving the electrochemical performances of the electrode materials. However, the pure PCHS possessed limited functional groups, which limited its electrical conductivity. Doping the heteroatoms (such as N) has been well demonstrated as a robust and versatile route to further boost their electronic conductivity and capacitance. Herein, we report a one-pot, surfactant-free synthesis of N-PCHS using four molecules: resorcinol, formaldehyde, tetrapropyl orthosilicatie (TPOS) and ethylenediamine (EDA). The co-condensation process between the in situ generated silica primary particles and the polymer oligomers is regulated, leading to monodispersed PCHS. The EDA is not only as the catalyst for the hydrolysis reaction of TPOS and resorcinol-formaldehyde, but also as the precursor of nitrogen. The resultant hollow N-doped PCHS shows monodispersed morphology (~200nm) and excellent performance for the Lithium-ion batteries.