Electrospun NiO nanofibers as high performance anode material for Li-ion batteries

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• 作者：Vanchiappan Aravindan^a ; ¹ ; ^{aravind_van@yahoo.com} ; Palaniswamy Suresh Kumar^a ; ¹ ; Jayaraman Sundaramurthy^a ; Wong Chui Ling^a ; Seeram Ramakrishna^b ; ^{seeram@nus.edu.sg} ; Srinivasan Madhavi^a ; ^c ; ^{Madhavi@ntu.edu.sg}
• 关键词：Electrospinning ; Nickel oxide nanofibers ; Conversion reaction ; Lithium-ion battery
• 刊名：Journal of Power Sources
• 出版年：2013
• 出版时间：1 April, 2013
• 年：2013
• 卷：227
• 期：Complete
• 页码：284-290
• 全文大小：1805 K

文摘

We report the synthesis and electrochemical performance of one dimensional NiO nanofibers by simple electrospinning technique and subsequently heat treated at 800?¡ãC to yield single phase material. After the heat treatment, thickness and crystal size electrospun NiO is found ¡«1?¦Ìm and 100?nm, respectively. The electrospun nanofibers are subjected to various characterizations such as X-ray diffraction with Rietveld refinement, scanning electron microscopy and transmission electron microscopy (TEM). Half-cell assembly is used to evaluate the Li-uptake properties and found maximum reversible capacity of ¡«784?mA?h?g^?1 at current density of 80?mA?g^?1 with operating potential of ¡«1.27?V vs. Li. The test cell rendered good cycleability and exhibits capacity retention of over 75 % of reversible capacity after 100 cycles. The conversion mechanism of metallic nanoparticles (Ni⁰) are validated though ex-situ TEM measurements. Rate performance studies are also conducted and delivered good cycling properties under such high current studies.