期刊
BATTERIES & SUPERCAPS
卷 5, 期 12, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/batt.202200336
关键词
aqueous lithium-ion batteries; interfaces; layered compounds; mass spectrometry; water splitting
资金
- Swedish Energy Agency [50119-1]
- Knut and Alice Wallenberg (KAW) Foundation [2017.0204]
- Swedish Research Council [2016-04069]
- Stiftelsen for Strategisk Forskning (SSF) [FFL18-0269]
- StandUp for Energy
- Swedish Research Council [2016-04069] Funding Source: Swedish Research Council
This study explores the feasibility of cycling aqueous cells in dilute electrolytes and provides a comprehensive understanding of the complex interfacial chemistry in dilute electrolytes. Based on the findings, design strategies and research directions for sustainable aqueous batteries with dilute electrolytes using layered-type electrodes are recommended.
Aqueous rechargeable batteries are appealing alternatives for large-scale energy storage. Reversible cycling of high-energy aqueous batteries has been showcased using highly concentrated aqueous electrolytes, which lead to a significantly suppressed water activity and formation of a stable solid-electrolyte interphase (SEI). However, the high salt concentration inevitably raises the cost and compromises the environmental sustainability. Herein, we use layered TiS2 as a model anode to explore the feasibility of cycling aqueous cells in dilute electrolytes. By coupling three-electrode cycling data with online electrochemical mass spectrometry measurements, we depict the potential-dependent gas evolution from the cell in the absence of a stable SEI. We offer a comprehensive mechanistic understanding of the complex interfacial chemistry in dilute electrolytes, taking into account material reactivity and interfacial compatibility. Design strategies and research directions of layered-type electrodes for sustainable aqueous batteries with dilute electrolytes are recommended, based on the scientific discovery presented in this work.
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