Micro-nano structured Ni-MOFs as high-performance cathode catalyst for rechargeable Li-O2 batteries

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題名:	Micro-nano structured Ni-MOFs as high-performance cathode catalyst for rechargeable Li-O2 batteries
作者:	鄭芳怡;Hu, Xiaofei;Zhu, Zhiqiang;Cheng, Fangyi;Tao, Zhanliang;Chen, Jun
貢獻者:	地球科學學院大氣科學學系
日期:	2015-07-28
上傳時間:	2026-04-21 14:06:38 (UTC+8)
出版者:	Royal Society of Chemistry
摘要:	摘要： Rechargeable Li-O 2 batteries with high theoretical energy density urgently require efficient cathode catalysts to improve their electrochemical performance. Here we first demonstrated the application of Ni-based organic frameworks of Ni(4,4′-bipy)(H3BTC) (4,4′-bipy = 4,4′-bipyridine; H3BTC = 1,3,5-benzenetricarboxylic acid) (Ni-MOFs) as high-performance cathode catalysts for rechargeable Li-O 2 batteries. It is found that Ni-MOFs with a three-dimensional (3D) micro-nano structure, open catalytic sites and large specific surface area can guarantee the free transfer of O 2 and effective contact between the electrolyte and the catalytic sites. Preliminary testing of Ni-MOFs showed that they possess an extremely high capacity of 9000 mA h g −1 , a high round-trip efficiency of 80%, and a respectable cycling of 170 cycles without obvious voltage drop. Furthermore, plastic rechargeable Li-O 2 batteries with Ni-MOFs as the cathode catalyst have been assembled, displaying an energy density of 478 Wh kg −1 . This study leads to both fundamental and technological advances of Ni-MOFs as the cathode for rechargeable Li-O 2 batteries. The operation of a rechargeable Li-O 2 battery with long cycling life, high rate capability, and large capacity is possible at room temperature by using a Ni-MOFs cathode catalyst, which possesses open metal sites, large specific surface area, and uniform 3D micro-nano structures. 出版日期： 2015-07-09 識別號： ISSN: 2040-3364 識別號： EISSN: 2040-3372 識別號： DOI: 10.1039/c5nr02487k
顯示於類別:	[大氣科學學系] 期刊論文

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