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Methylsulfonylmethane-Based Deep Eutectic Solvent as a New Type of Green Electrolyte for a High-Energy-Density Aqueous Lithium-Ion Battery AITranslate

Ping Jiang; Liang Chen; Hezhu Shao; Shaohua Huang; Qiushi Wang; Yuebin Su; Xiaoshuang Yan; Xinmiao Liang; Jiujun Zhang; Jiwen Feng; Zhaoping Liu;
P. R. China|University of Chinese Academy of Sciences; Ningbo Institute of Materials Technology and Engineering; Ningbo Institute of Materials Technology and Engineering; Ningbo University; Ningbo Institute of Materials Technology and Engineering; Ningbo Institute of Materials Technology and Engineering;Wuhan Institute of Physics and Mathematics;Wuhan Institute of Physics and Mathematics; Shanghai University;Wuhan Institute of Physics and Mathematics; Ningbo Institute of Materials Technology and Engineering
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Abstract AITranslate

Currently used aqueous electrolytes for lithium-ion batteries suffer from narrow potential windows of <1.5 V. In this paper, we are the first to discover the new deep eutectic solvent (DES) electrolyte of the methylsulfonylmethane–lithium perchlorate–water system, which is a safe, environmentally friendly, and low-cost “water-in-salt” aqueous electrolyte. It is found that the lithium ion can coordinate with the oxygen atom in the S═O double bond, perchlorate, and water molecule, retaining fluidity at room temperature when the molar ratios of MSM:LiClO4:H2O are 1.8:1:z (z > 0.3). This DES electrolyte performs with a satisfying electrochemical stability window (∼3.5 V), which enables the LiMn2O4/Li4Ti5O12 aqueous lithium-ion battery with both high energy density (>160 W h kg–1) and high capacity retention (72.2% after 1000 cycles). Overall, our study of this new deep DES electrolyte can enrich room-temperature “water-in-salt” aqueous electrolyte and offers new insights into exploring green aqueous electrolyte systems for lithium-ion batteries.

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DOI：https://doi.org/10.1021/acsenergylett.9b00968

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Citation Information:

Currently used aqueous electrolytes for lithium-ion batteries suffer from narrow potential windows of <1.5 V. In this paper, we are the first to discover the new deep eutectic solvent (DES) electrolyte of the methylsulfonylmethane–lithium perchlorate–water system, which is a safe, environmentally friendly, and low-cost “water-in-salt” aqueous electrolyte. It is found that the lithium ion can coordinate with the oxygen atom in the S═O double bond, perchlorate, and water molecule, retaining fluidity at room temperature when the molar ratios of MSM:LiClO4:H2O are 1.8:1:z (z > 0.3). This DES electrolyte performs with a satisfying electrochemical stability window (∼3.5 V), which enables the LiMn2O4/Li4Ti5O12 aqueous lithium-ion battery with both high energy density (>160 W h kg–1) and high capacity retention (72.2% after 1000 cycles). Overall, our study of this new deep DES electrolyte can enrich room-temperature “water-in-salt” aqueous electrolyte and offers new insights into exploring green aqueous electrolyte systems for lithium-ion batteries.

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GB/T 7714-2015 [1] Ping Jiang, Liang Chen, Hezhu Shao, et al. ACS Energy Letters, 2019(4). DOI:10.1021/acsenergylett.9b00968.
MLA [1] Ping Jiang, et al., ACS Energy Letters, no. 4, 2019, https://doi.org/10.1021/acsenergylett.9b00968.
APA [1] Ping Jiang, Liang Chen, Hezhu Shao, Shaohua Huang, Qiushi Wang, Yuebin Su, Xiaoshuang Yan, Xinmiao Liang, Jiujun Zhang, Jiwen Feng, & Zhaoping Liu. (2019). ACS Energy Letters(4). https://doi.org/10.1021/acsenergylett.9b00968
IEEE [1] Ping Jiang, Liang Chen, Hezhu Shao, Shaohua Huang, Qiushi Wang, Yuebin Su, Xiaoshuang Yan, Xinmiao Liang, Jiujun Zhang, Jiwen Feng, and Zhaoping Liu, ACS Energy Letters, no. 4, 2019, doi: 10.1021/acsenergylett.9b00968.