A sodium perchlorate-based hybrid electrolyte with high salt-to-water molar ratio for safe 2.5 V carbon-based supercapacitor

Dou, Qingyun; Lu, Yuqin; Su, Lijun; Zhang, Xu; Lei, Shulai; Bu, Xudong; Liu, Lingyang; Xiao, Di; Chen, Jiangtao; Shi, Siqi; Yan, Xingbin

doi:10.1016/j.ensm.2019.03.016

Cited by 120 publications

(97 citation statements)

References 56 publications

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“…169 The low ionic conductivity is generally considered to be the main disadvantage of WIS electrolytes due to the strong coordination between Li + and water molecules, leading to unsatisfactory rate/power capabilities of CSs. [174][175][176][177] More recently, introducing extra ions with weak/ inert interactions into the WIS electrolytes has further boosted the salt/water ratio to an unprecedented level, and these waterin-bisalt electrolytes with upgraded operational potential still maintain competitive conductivities and viscosities in contrast to typical organic electrolytes (Fig. 12).…”

Section: Wis Electrolytesmentioning

confidence: 99%

Recent advances in carbon-based supercapacitors

et al. 2020

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Section: Wis Electrolytesmentioning

confidence: 99%

Recent advances in carbon-based supercapacitors

et al. 2020

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“…Accordingly, by combining 8 M NaClO 4 with ACN solvent, the voltage window of the aqueous SCs with NaClO 4 /(H 2 O) 1.5 /(ACN) 2.4 WIS electrolyte reaching 2.5 V was reported by Yan and co-workers. [51] In general, WIS electrolyte as a novel electrolyte can provide an ultrahigh voltage window comparable to commercial organic electrolyte even when utilizing conventional materials electrode. The typical WIS electrolytes (LiTFSI) suffer from their low ionic conductivity and high viscosity, which can be ameliorated by introducing a small quantity of organic solution (ACN).…”

Section: "Water In Salt" Electrolytementioning

confidence: 99%

Aqueous Supercapacitor with Ultrahigh Voltage Window Beyond 2.0 Volt

Liu

Huang

2020

Small Structures

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Her research focuses on the design, synthesis, and evaluation of electrode materials for advanced energy storage systems. Tian-Yi Ma received his Ph.D. in physical chemistry in 2013 from Nankai University, China. He then worked as a postdoctoral research fellow from 2013 to 2014 at University of Adelaide, Australia. He is currently a senior lecturer in discipline of chemistry at University of Newcastle, leading an independent research group focusing on energy materials and catalysis.

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“…Therefore, adjusting the properties of aqueous electrolytes is a key scientific issue for achieving high‐performance aqueous energy‐storage devices. [ 11,12 ]…”

Section: Figurementioning

confidence: 99%

A Universal Approach to Aqueous Energy Storage via Ultralow‐Cost Electrolyte with Super‐Concentrated Sugar as Hydrogen‐Bond‐Regulated Solute

et al. 2020

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Compared with the organic, ionic liquid, and solid-state electrolytes, aqueous electrolytes have the advantages of good security, environmental friendliness, high ionic conductivity, low cost, and high operability in ordinary environments. [1][2][3][4][5] Therefore, aqueous secondary ion batteries/capacitors are more attractive in large-scale energy storage, and have greater application prospects. [6][7][8][9] However, even so, there still exists several disadvantages as follows: 1) The thermodynamic electrochemical stability window (ESW) of water is as narrow as 1.23 V. Even considering the existence of overpotential, the ESWs of conventional aqueous electrolytes are not higher than 2 V. 2) Usually, the electrode materials cannot form stable interface in water, so it is difficult to ensure the cycling stability. 3) Dissolution and even decomposition of electrode materials and discharge/charge products limit the choice of electrode materials. [10] These factors have limited the improvement of key electrochemical performance indicators such as energy density, output voltage, and cycle life of aqueous energy-storage devices Aqueous energy-storage systems have attracted wide attention due to their advantages such as high security, low cost, and environmental friendliness. However, the specific chemical properties of water induce the problems of narrow electrochemical stability window, low stability of water-electrode interface reactions, and dissolution of electrode materials and intermediate products. Therefore, new low-cost aqueous electrolytes with different water chemistry are required. The nature of water depends largely on its hydroxylbased hydrogen bonding structure. Therefore, the super-concentrated hydroxyl-rich sugar solutions are designed to change the original hydrogen bonding structure of water. The super-concentrated sugars can reduce the free water molecules and destroy the tetrahedral structure, thus lowering the binding degree of water molecules by breaking the hydrogen bonds. The ionic electrolytes based on super-concentrated sugars have the expanded electrochemical stability window (up to 2.812 V), wide temperature adaptability (-50 to 80 °C), and fair ionic conductivity (8.536 mS cm −1 ). Aqueous lithium-, sodium-, potassium-ion batteries and supercapacitors using super-concentrated sugar-based electrolytes demonstrate an excellent electrochemical performance. The advantages of ultralow cost and high universality enable a great practical application potential of the superconcentrated sugar-based aqueous electrolytes, which can also provide great experimental and theoretical assistance for further research in water chemistry.

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A sodium perchlorate-based hybrid electrolyte with high salt-to-water molar ratio for safe 2.5 V carbon-based supercapacitor

Cited by 120 publications

References 56 publications

Recent advances in carbon-based supercapacitors

Recent advances in carbon-based supercapacitors

Aqueous Supercapacitor with Ultrahigh Voltage Window Beyond 2.0 Volt

A Universal Approach to Aqueous Energy Storage via Ultralow‐Cost Electrolyte with Super‐Concentrated Sugar as Hydrogen‐Bond‐Regulated Solute

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A sodium perchlorate-based hybrid electrolyte with high salt-to-water molar ratio for safe 2.5 V carbon-based supercapacitor

Cited by 120 publications

References 56 publications

Recent advances in carbon-based supercapacitors

Recent advances in carbon-based supercapacitors

Aqueous Supercapacitor with Ultrahigh Voltage Window Beyond 2.0 Volt

A Universal Approach to Aqueous Energy Storage via Ultralow‐Cost Electrolyte with Super‐Concentrated Sugar as Hydrogen‐Bond‐Regulated Solute

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Product

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A sodium perchlorate-based hybrid electrolyte with high salt-to-water molar ratio for safe 2.5 V carbon-based supercapacitor