Research progress on electrolyte key salts for sodium-ion batteries

Zhao, weimin; Wang, Miao; Lin, Haichen; Kim, Kangwoon; He, Rongkai; Feng, Shijie; Liu, Haodong

doi:10.1016/j.pnsc.2024.03.003

Progress in Natural Science: Materials International

2024

DOI: 10.1016/j.pnsc.2024.03.003

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Research progress on electrolyte key salts for sodium-ion batteries

weimin Zhao,

Miao Wang,

Haichen Lin

et al.

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2024

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Cited by 2 publications

References 89 publications

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Key Issues of Salt Cavern Flow Battery

Huang,

Li,

Shi

et al. 2024

Energies

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Salt cavern flow batteries (SCFBs) are an energy storage technology that utilize salt caverns to store electrolytes of flow batteries with a saturated NaCl solution as the supporting electrolyte. However, the geological characteristics of salt caverns differ significantly from above-ground storage tanks, leading to complex issues in storing electrolytes within salt caverns. Therefore, investigating and summarizing these issues is crucial for the advancement of SCFB technology. This paper’s innovation lies in its comprehensive review of the current state and development trends in SCFBs both domestically and internationally. First, the current development status of SCFB energy storage technology both domestically and internationally is summarized. Then, eight main issues are proposed from the perspectives of salt cavern geological characteristics (tightness, conductivity, ions, and temperature) and electrolyte properties (selection, permeability, corrosion, and concentration). Finally, a novel SCFB system is proposed to address the most critical issue, which is the low concentration and uneven distribution of active materials in the current SCFB system. The review in this paper not only comprehensively summarizes the development status of SCFBs both domestically and internationally, but also points out the direction for the future research focussing on SCFBs.

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Key Issues of Salt Cavern Flow Battery

Huang,

Li,

Shi

et al. 2024

Energies

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Interface Issues of Layered Transition Metal Oxide Cathodes for Sodium-Ion Batteries: Current Status, Recent Advances, Strategies, and Prospects

Kuang,

Wu,

Zhang

et al. 2024

Molecules

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Sodium-ion batteries (SIBs) hold significant promise in energy storage devices due to their low cost and abundant resources. Layered transition metal oxide cathodes (NaxTMO2, TM = Ni, Mn, Fe, etc.), owing to their high theoretical capacities and straightforward synthesis procedures, are emerging as the most promising cathode materials for SIBs. However, the practical application of the NaxTMO2 cathode is hindered by an unstable interface, causing rapid capacity decay. This work reviewed the critical factors affecting the interfacial stability and degradation mechanisms of NaxTMO2, including air sensitivity and the migration and dissolution of TM ions, which are compounded by the loss of lattice oxygen. Furthermore, the mainstream interface modification approaches for improving electrochemical performance are summarized, including element doping, surface engineering, electrolyte optimization, and so on. Finally, the future developmental directions of these layered NaxTMO2 cathodes are concluded. This review is meant to shed light on the design of superior cathodes for high-performance SIBs.

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Research progress on electrolyte key salts for sodium-ion batteries

Cited by 2 publications

References 89 publications

Key Issues of Salt Cavern Flow Battery

Key Issues of Salt Cavern Flow Battery

Interface Issues of Layered Transition Metal Oxide Cathodes for Sodium-Ion Batteries: Current Status, Recent Advances, Strategies, and Prospects

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