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Synthesis of porous NiO nanocrystals with controllable surface area and their application as supercapacitor electrodes

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Synthesis of porous NiO nanocrystals with controllable surface area and their application as supercapacitor electrodes
นักวิจัย : Zhang, Xiaojun , Shi, Wenhui , Zhu, Jixin , Zhao, Weiyun , Ma, Jan , Subodh Gautam Mhaisalkar , Lim, Tuti Maria , Yang, Yanhui , Zhang, Hua , Hng, Huey Hoon , Yan, Qingyu
คำค้น : DRNTU::Engineering::Materials::Nanostructured materials.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2553
อ้างอิง : Zhang, X., Shi, W., Zhu, J., Zhao, W., Ma, J., Subodh, G. M., et al. (2010). Synthesis of porous NiO nanocrystals with controllable surface area and their application as supercapacitor electrodes. Nano research, 3(9), 643-652. , http://hdl.handle.net/10220/8088 , http://dx.doi.org/10.1007/s12274-010-0024-6
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Nano research
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

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 capacitances. The formation of controllable porosity is due to the dehydration and re-crystallization of β-Ni(OH)2 nanoplates synthesized by a hydrothermal process. Thermogravimetric analysis shows that the decomposition temperature of the β-Ni(OH)2 nanostructures is related to their morphology. In electrochemical tests, the porous NiO nanostructures show stable cycling performance with retention of specific capacitance over 1000 cycles. Interestingly, 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 nanoplates. Consequently, 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/g. This 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.

บรรณานุกรม :
Zhang, Xiaojun , Shi, Wenhui , Zhu, Jixin , Zhao, Weiyun , Ma, Jan , Subodh Gautam Mhaisalkar , Lim, Tuti Maria , Yang, Yanhui , Zhang, Hua , Hng, Huey Hoon , Yan, Qingyu . (2553). Synthesis of porous NiO nanocrystals with controllable surface area and their application as supercapacitor electrodes.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Zhang, Xiaojun , Shi, Wenhui , Zhu, Jixin , Zhao, Weiyun , Ma, Jan , Subodh Gautam Mhaisalkar , Lim, Tuti Maria , Yang, Yanhui , Zhang, Hua , Hng, Huey Hoon , Yan, Qingyu . 2553. "Synthesis of porous NiO nanocrystals with controllable surface area and their application as supercapacitor electrodes".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Zhang, Xiaojun , Shi, Wenhui , Zhu, Jixin , Zhao, Weiyun , Ma, Jan , Subodh Gautam Mhaisalkar , Lim, Tuti Maria , Yang, Yanhui , Zhang, Hua , Hng, Huey Hoon , Yan, Qingyu . "Synthesis of porous NiO nanocrystals with controllable surface area and their application as supercapacitor electrodes."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2553. Print.
Zhang, Xiaojun , Shi, Wenhui , Zhu, Jixin , Zhao, Weiyun , Ma, Jan , Subodh Gautam Mhaisalkar , Lim, Tuti Maria , Yang, Yanhui , Zhang, Hua , Hng, Huey Hoon , Yan, Qingyu . Synthesis of porous NiO nanocrystals with controllable surface area and their application as supercapacitor electrodes. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2553.