Decomposing lithium carbonate with a mobile catalyst

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2017专题

	Decomposing lithium carbonate with a mobile catalyst
	Li, Hong; Liu, Zixuan; Zhang, Yantao; Jia, Chuankun; Wan, Hao; Peng, Zhe; Bi, Yujing; Liu, Yang; Peng, Zhangquan; Wang, Qing
刊名	NANO ENERGY
	2017
卷号	36 页码:390-397
ISSN号	2211-2855
英文摘要	The accumulation of insulating lithium carbonate (Li2CO3) in the air cathode is one of the major obstacles hindering the long-term operation of Li-air batteries. Here two redox mediators (RMs), mononuclear and binuclear cobalt phthalocyanine (mono-CoPc and bi-CoPc), are investigated as mobile catalysts to facilitate decomposition of Li2CO3. Although both RMs possess suitable redox couples at certain potentials, only bi-CoPc significantly accelerates Li2CO3 oxidation by 2.88 times, which probably requires two electrons donated to one RM molecule rather than tandem electron transfer with different molecules. The excellent catalytic effect of bi-CoPc relies on the relatively lower potential of its second active redox couple, similar to 3.82 V vs. Li/Li+, while that of mono-CoPc (4.31 V vs. Li/Li+) is beyond the electrolyte's stability window. The addition of bi-CoPc improves the cathode's cyclability by 8 times to 171 cycles under CO2/O-2 (2: 1, v/v) and 6 times to 211 cycles under N-2/O-2 (78: 22, v/v) with cut-off capacity of 500 mA h g(-1). The results clearly demonstrate that Li2CO3 could be efficiently removed with appropriate mobile catalysts via 2-electron transfer. These mobile catalysts also shed light on the new approaches for further development of viable air cathode enabling long-term rechargeability of Li-air batteries.
公开日期	2017-12-25
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/13798]
专题	2017专题
推荐引用方式 GB/T 7714	Li, Hong,Liu, Zixuan,Zhang, Yantao,et al. Decomposing lithium carbonate with a mobile catalyst[J]. NANO ENERGY,2017,36:390-397.
APA	Li, Hong.,Liu, Zixuan.,Zhang, Yantao.,Jia, Chuankun.,Wan, Hao.,...&Zhang, Ji-Guang.(2017).Decomposing lithium carbonate with a mobile catalyst.NANO ENERGY,36,390-397.
MLA	Li, Hong,et al."Decomposing lithium carbonate with a mobile catalyst".NANO ENERGY 36(2017):390-397.