Integrated Charge Transfer in Colloidal Cu鈥揗nO Heterostructures for High-Performance Lithium Ion Batteries

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• 作者：Hui Teng Tan ; Xianhong Rui ; Ziyang Lu ; Chen Xu ; Weiling Liu ; Huey Hoon Hng ; Qingyu Yan
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：August 7, 2014
• 年：2014
• 卷：118
• 期：31
• 页码：17452-17460
• 全文大小：547K
• ISSN：1932-7455

文摘

Nanodimensional monodispersed Cu鈥揗nO heterostructures were synthesized via a facile solution-based method. Cu鈥揗nO heterostructures with narrow size distribution were successfully achieved in the presence of organic surfactants to prevent agglomeration during the growth process. Furthermore, the unique architecture of carbon-coated Cu鈥揗nO (Cu鈥揗nO@C) core鈥搒hell heterostructures obtained after a thermal annealing process preserved the electrical integrity of the electrode via the conductive copper 鈥渘anobridge鈥?to provide an efficient electron transfer pathway between the active materials and the current collector. On the other hand, the amorphous carbonaceous shell evidently gives a protective layer to attain structural integrity throughout the electrochemical measurements. Enhancement in the electrochemical performance can be reflected by the excellent cycling stability and high rate capability of the Cu鈥揗nO@C heterostructures as compared to the MnO@C nanoparticles.