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Synthesis of Porous NiO Nanocrystals with Controllable Surface Area and Their Application as Supercapacitor Electrodes

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Nano Research 2010年第9期3卷 643-652页

作者： Xiaojun Zhang Wenhui Shi Jixin Zhu Weiyun Zhao Jan Ma subodh mhaisalkar Tuti Lim Maria Yanhui Yang Hua Zhang Huey Hoon Hng Qingyu Yan School of Materials Science and Engineering Nanyang Technological University639798Singapore College of Chemistry and Materials Science Anhui Normal UniversityWuhu 241000China Energy Research Institute Nanyang Technological University637459Singapore School of Civil and Environmental Engineering Nanyang Technological University639798Singapore School of Life Sciences and Chemical Technology Ngee Ann Polytechnic535 Clementi RoadSingapore School of Chemical and Biomolecular Engineering Nanyang Technological University637459Singapore

We report a facile way to grow various porous NiO nanostructures including nanoslices,nanoplates,and nanocolumns,which show a structure-dependence in their specific charge *** formation of controllable porosity is due to the dehydration and re-crystallization of β-Ni(OH)_(2) nanoplates synthesized by a hydrothermal *** analysis shows that the decomposition temperature of the β-Ni(OH)_(2) nanostructures is related to their *** electrochemical tests,the porous NiO nanostructures show stable cycling performance with retention of specific capacitance over 1000 ***,the formation of nanocolumns by the stacking of β-Ni(OH)_(2) nanoslices/plates favors the creation of small pores in the NiO nanocrystals obtained after annealing,and the surface area is over five times larger than that of NiO nanoslices and ***,the specific capacitance of the porous NiO nanocolumns(390 F/g)is significantly higher than that of the nanoslices(176 F/g)or nanoplates(285 F/g)at a discharge current of 5 A/*** approach provides a clear illustration of the process-structure-property relationship in nanocrystal synthesis and potentially offers strategies to enhance the performance of supercapacitor electrodes.

关键词： Ni(OH)_(2) NiO porous nanocrystals supercapacitor

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Towards efficient and stable perovskite photovoltaics with F-contained phosphoric salt surface passivation

Towards efficient and stable perovskite photovoltaics with F...

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第六届新型太阳能电池材料科学与技术学术研讨会

作者： Guifang Han Teck Ming Koh Jia Li Benny Febriansyah Nur Fadilah Jamaludin subodh mhaisalkar Nripan Mathews Energy Research Institute NTU (ERI N) Nanyang Technological UniversityResearch Techno Plaza School of Materials Science and Engineering Nanyang Technological University

Surface passivation has been proved as an effective strategy to improve the efficiency and stability of perovskite solar cells. However there is no report on how to choose the passivator, whether it should form as strong or weak bond with perovskite beneath. Here we selectively choose two molecular, alkali carbon chain phosphoric

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