journal article·2022-02-16

Intercalation of Zinc Monochloride Cations by Deep Eutectic Solvents for High-Performance Rechargeable Non-aqueous Zinc Ion Batteries

Shu-Chi Wu, Meng-Che Tsa, Hsiang-Ju Liao, Teng-Yu Su, Shin-Yi Tang, Chia-Wei Chen, Heng-An Lo, Tzu-Yi Yang, Kuangye Wang, Yuanfei Ai, Yu-Ze Chen, Ling Lee, Jyh-Fu Lee, Chun-Jung Lin, Bing Joe Hwang, Yu-Lun Chueh

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Abstract

Zinc ion batteries have been extensively studied with an aqueous electrolyte system. However, the batteries suffer from a limited potential window, gas evolution, cathode dissolution, and dendrite formation on the anode. Considering these limitations, we developed an alternative electrolyte system based on deep eutectic solvents (DESs) because of their low cost, high stability, biodegradability, and non-flammability, making them optimal candidates for sustainable batteries. The DES electrolyte enables reversible Zn plating/stripping and effectively suppresses zinc dendrite formation. Furthermore, in-depth characterizations reveal that the energy storage mechanism can be attributed to [ZnCl]+ ion intercalation and the intermediate complex ion plays a pivotal role in electrochemical reactions, which deliver a high reversible capacity of 310 mAh g–1 at 0.1 A g–1and long-term stability (167 mAh g–1 at a current density of 0.3 A g–1 after 300 cycles, Coulombic efficiency: ∼98%). Overall, this work represents our new finding in rechargeable batteries with the DES electrolyte.
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Research context

OpenAlex topics: Advanced battery technologies research · Ionic liquids properties and applications · Electrocatalysts for Energy Conversion

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Materials Science and Engineering, National Tsing-Hua University, Hsinchu 30013, Taiwan

Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan

Department of Physics, National Sun Yet-Sun University, Kaohsiung 80424, Taiwan

Nano Electrochemistry Laboratory, Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan

Department of Materials Science and Engineering, National Cheng Kung University, Tainan 701401, Taiwan

National Synchrotron Radiation Research Center, Hsin-Chu 30076, Taiwan

NanoElectrochemistry Laboratory, Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan

Funding

Ministry of Science and Technology

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