Work

Trace doping by fluoride and sulfur to enhance adsorption capacity of manganese oxides for lithium recovery

Year: 2020

Type: article

Abstract: The H1.6Mn1.6O4 (HMO) derived from Li1.6Mn1.6O4 (LMO) has been aroused enormously attention due to high adsorption capacity. Through surface trace doping of F and S (LMO-R, R = F, S), the cycling stabilities and adsorption abilities of Li1.6Mn1.6O4 are improved. The adsorption uptakes are increased from 26.1 mg/g (before doping) to 33.4 and 27.9 mg/g at Li+ concentration of 12 mmol/L, respectively. In addition, first-principles calculations further confirm that F and S substitutes for O at 32e sites, leading to an improvement of the Li+ uptake rate. The Li+ adsorption capacities in the cycling process are enhanced by F and S doped, which may result from improving the charge density and offering more charge carriers that can participate in the ad/desorption reaction. The effect of the F and S substitution on adsorption capacity is discussed.

Source: Materials & Design

DOI: 10.1016/j.matdes.2020.108867

Authors: Fangren Qian, Bing Zhao, Min Guo, Zhiqiang Qian, Zhijian Wu, Zhong Liu

Institutions: Chinese Academy of Sciences, University of Chinese Academy of Sciences, Qinghai Institute of Salt Lakes

Language: English

Topic: Extraction and Separation Processes

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,000