Screening the deep eutectic electrolytes for supercapacitors with alleviated self-discharge

Huang, Wenxia; Yan, Xiaohui; Xiong, Yige; Guo, Qihui; Zhang, Xin; Huang, Fengyu; Shi, Houqiang; Ge, Xiang

doi:10.1039/d3ya00390f

Energy Adv.

2023

DOI: 10.1039/d3ya00390f

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Screening the deep eutectic electrolytes for supercapacitors with alleviated self-discharge

Wenxia Huang,

Xiaohui Yan,

Yige Xiong

et al.

Abstract: Self-discharge in supercapacitors is a major challenge and it’s mainly determined by the property of the electrolyte. The emergence of deep eutectic solvents (DESs) provides a promising research frontier, but...

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2024

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Recycling and Reutilization of Metals Aided by Deep Eutectic Solvents: from NMC Cathodes of Spent Li‐ion Batteries to Electrolytes for Supercapacitors

Xu,

Díez,

Sevilla

et al. 2024

ChemSusChem

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With the rapidly increasing demand for lithium ion batteries (LIBs), recycling the metals found in spent cathodes is mandatory to both alleviate shortages resulting from the mining of natural metal ores and manage the disposal of spent LIBs. The use of deep eutectic solvents (DESs) for metals recovery from spent cathodes of LIBs (e.g., LCO and NMC types) offers a sustainable yet efficient alternative to conventional hydrometallurgical processes. Nonetheless, further efforts are required to use milder temperatures and higher mass loadings, thus ensuring cost‐effectiveness. In this latter regard, addressing the reutilization of DESs in subsequent stages of metal extraction, and streamlining or eliminating the chemical procedures employed for metal separation, is even more crucial to guarantee the economic feasibility of the recycling process. Herein, we have prepared a DES that provides extraction efficiencies of ca. 100% for every metal of NMC cathodes even at mild experimental conditions (e.g., 60 °C) and for loadings as high as 70 mgNMC/gDES. Moreover, we have pioneered the direct use of leachates containing DESs and metals as electrolytes for supercapacitors. This approach enables the reintroduction of DESs and the recovered metals into the value chain with a minimal economic and environmental impact.

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Recycling and Reutilization of Metals Aided by Deep Eutectic Solvents: from NMC Cathodes of Spent Li‐ion Batteries to Electrolytes for Supercapacitors

Xu,

Díez,

Sevilla

et al. 2024

ChemSusChem

View full text Add to dashboard Cite

show abstract

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Screening the deep eutectic electrolytes for supercapacitors with alleviated self-discharge

Abstract: Self-discharge in supercapacitors is a major challenge and it’s mainly determined by the property of the electrolyte. The emergence of deep eutectic solvents (DESs) provides a promising research frontier, but...

Cited by 1 publication

References 61 publications

Recycling and Reutilization of Metals Aided by Deep Eutectic Solvents: from NMC Cathodes of Spent Li‐ion Batteries to Electrolytes for Supercapacitors

Recycling and Reutilization of Metals Aided by Deep Eutectic Solvents: from NMC Cathodes of Spent Li‐ion Batteries to Electrolytes for Supercapacitors

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