Quantitative Analysis of Cation Selectivity of the Electrodes in Multi-ion Electrolytes Based on 2H-Phase MoS2

Wang，Congcong1; Jiang，Zhiqiang1; Li，Jien1; Xu，Weina1; Wan，Jing1; Wang，Yanwei1; Gu，Xiao2; Rao Nulakani，Naga Venkateswara3; Huang，Li3; Hu，Chenguo1

2020-05-07

10.1021/acs.jpcc.0c00036

Journal of Physical Chemistry C   影响因子和分区

1932-7447

1932-7455

Multi-ion batteries and supercapacitors are promising as energy storage devices. However, the intercalation/deintercation of various cations on the electrodes in the hybrid electrolytes is not clearly understood. Herein, the selectivity of different cations (viz., K, Na, Li) in hybrid aqueous electrolytes based on hierarchical 2H-phase MoS is investigated by combining experimental and theoretical methods. A quantitative method based on first-principles calculations is proposed to enumerate the cation selectivity in hybrid aqueous electrolytes. It indicates that the eventual intercalation of various cations in the MoS interlayer space is mainly reliant on the competition reactions of the various cations in the hybrid electrolytes into the electrode. The chemical potentials related to the molar ratio and the binding energy of different cations into the electrode play a pivotal role in such selectivity of the cations. This mechanism is tested using the MoS@ACC (flower-like MoS grown on the active carbon cloth substrate) electrode, which is fabricated in one-step using the simple hydrothermal technique. The theoretical cation selectivity is also reinforced by the experimental results based on the 2H-MoS@ACC electrodes. Overall, this study provides a fundamental understanding of the electrochemical storage behavior between electrolytes and electrodes for multi-ion capacitors.

SCI ; EI

英语

其他

NSFC[51572040][51732005] ; Fundamental Research Funds for the Central Universities[CYFH201821][2019CDXZWL001]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000535175400005

AMER CHEMICAL SOC

20202108695956

Electrochemical electrodes ; Sulfur compounds ; Supercapacitor ; Calculations ; Layered semiconductors ; Molar ratio ; Binding energy ; Positive ions ; Electrolytes

Electric Batteries and Fuel Cells:702 ; Electric Components:704.1 ; Semiconducting Materials:712.1 ; Physical Chemistry:801.4 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Mathematics:921

2-s2.0-85084937690

Scopus

1.Department of Applied Physics,State Key Laboratory of Power Transmission Equipment and System Security and New Technology,Chongqing University,Chongqing,400044,China
2.School of Physical Science and Technology,Ningbo University,Ningbo,315211,China
3.Department of Physics,Southern University of Science and Technology,Shenzhen, Guangdong,518055,China

Wang，Congcong,Jiang，Zhiqiang,Li，Jien,et al. Quantitative Analysis of Cation Selectivity of the Electrodes in Multi-ion Electrolytes Based on 2H-Phase MoS2[J]. Journal of Physical Chemistry C,2020,124(18):9665-9672.

Wang，Congcong.,Jiang，Zhiqiang.,Li，Jien.,Xu，Weina.,Wan，Jing.,...&Hu，Chenguo.(2020).Quantitative Analysis of Cation Selectivity of the Electrodes in Multi-ion Electrolytes Based on 2H-Phase MoS2.Journal of Physical Chemistry C,124(18),9665-9672.

Wang，Congcong,et al."Quantitative Analysis of Cation Selectivity of the Electrodes in Multi-ion Electrolytes Based on 2H-Phase MoS2".Journal of Physical Chemistry C 124.18(2020):9665-9672.