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

Fangren Qian; Bing Zhao; Min Guo; Zhiqiang Qian; Zhijian Wu; Zhong Liu

Materials & Design (Sep 2020)

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

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

Affiliations

Fangren Qian: Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China; Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining 810008, China; University of Chinese Academy of Sciences, Beijing 100049, China
Bing Zhao: Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China; Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining 810008, China; University of Chinese Academy of Sciences, Beijing 100049, China
Min Guo: Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China; Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining 810008, China; Corresponding authors at: Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining 810008, China.
Zhiqiang Qian: Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China; Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining 810008, China
Zhijian Wu: Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China; Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining 810008, China
Zhong Liu: Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China; Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining 810008, China; Corresponding authors at: Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining 810008, China.

Journal volume & issue: Vol. 194
p. 108867

Abstract

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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.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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