Waste to wealth: Defect-rich Ni-incorporated spent LiFePO4 for efficient oxygen evolution reaction

doi:10.1007/s40843-021-1682-0

	Waste to wealth: Defect-rich Ni-incorporated spent LiFePO4 for efficient oxygen evolution reaction
	Cui, Baihua 4; Liu, Chang 2; Zhang, Jinfeng 2; Lu, Jijun 1; Liu, Siliang 2; Chen, Fangshuai 2; Zhou, Wei 3; Qian, Guoyu 1; Wang, Zhi 1; Deng, Yida 2
刊名	SCIENCE CHINA-MATERIALS
	2021-06-01
页码	9
关键词	functional conversion spent cathode LiFePO4 oxygen evolution reaction DFT calculation
ISSN号	2095-8226
DOI	10.1007/s40843-021-1682-0
英文摘要	The development of efficient strategies to recycle lithium-ion battery (LIB) electrode materials is an important yet challenging goal for the sustainable management of battery waste. This work reports a facile and economically efficient method to convert spent cathode material, LiFePO4, into a high-performance NiFe oxy/hydroxide catalyst for the oxygen evolution reaction (OER). Herein, Ni-LiFePO4 is synthesized via the wetness impregnation method and further evolves into defect-rich NiFe oxy/hydroxide nanosheets during the OER. The introduction of the Ni promoter together with in situ evolution strengthens the electronic interactions among the metal sites and creates an abundance of defects. Experimentally, the evolved Ni-LiFePO4 delivers a low overpotential of 285 mV at 10 mA cm(-2) and a small Tafel slope of 45 mV dec(-1), outperforming pristine LiFePO4 and is even superior to the benchmark catalyst RuO2. Density functional theory (DFT) calculations reveal that the introduction of Ni effectively activates Fe sites by optimizing the free energy of the *OOH intermediate and that the abundance of oxygen defects facilitates the oxygen desorption step, synergistically enhancing the OER performance of LiFePO4. As a green and versatile method, this is a new opportunity for the scalable fabrication of excellent electrocatalysts based on spent cathode materials.
资助项目	National Natural Science Foundation of China[91963113]
WOS关键词	LI-ION BATTERIES ; SURFACE ; ELECTROCATALYSTS ; LITHIUM ; RECONSTRUCTION ; DELITHIATION ; GENERATION ; HYDROXIDES ; NANOSHEETS ; PHOSPHATE
WOS研究方向	Materials Science
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000657589000001
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/49004]
专题	中国科学院过程工程研究所
通讯作者	Zhou, Wei; Chen, Yanan; Hu, Wenbin
作者单位	1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China 2.Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300372, Peoples R China 3.Tianjin Univ, Sch Sci, Tianjin 300072, Peoples R China 4.Tianjin Univ, Joint Sch Natl Univ Singapore, Int Campus Tianjin Univ, Int Campus, Fuzhou 350207, Peoples R China
推荐引用方式 GB/T 7714	Cui, Baihua,Liu, Chang,Zhang, Jinfeng,et al. Waste to wealth: Defect-rich Ni-incorporated spent LiFePO4 for efficient oxygen evolution reaction[J]. SCIENCE CHINA-MATERIALS,2021:9.
APA	Cui, Baihua.,Liu, Chang.,Zhang, Jinfeng.,Lu, Jijun.,Liu, Siliang.,...&Hu, Wenbin.(2021).Waste to wealth: Defect-rich Ni-incorporated spent LiFePO4 for efficient oxygen evolution reaction.SCIENCE CHINA-MATERIALS,9.
MLA	Cui, Baihua,et al."Waste to wealth: Defect-rich Ni-incorporated spent LiFePO4 for efficient oxygen evolution reaction".SCIENCE CHINA-MATERIALS (2021):9.