The effect of the ionic size of small quaternary ammonium BF4 salts on electrochemical double layer capacitors

Koh, Ah Reum; Hwang, Byunghyun; Roh, Kwang Chul; Kim, Ketack

doi:10.1039/c4cp00949e

Cited by 77 publications

(54 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…59,68 On the one hand, Please do not adjust margins Please do not adjust margins research has identified that the ionic size and type of different salts have great influences on the capacitance and power performance of EDLCs. [69][70][71] It was observed that quaternary ammonium salts with small cations could achieve a high EDLC specific capacitance. 69 Furthermore, the salt also plays an important role in affecting the electrochemical window of organic electrolytes.…”

Section: Supercapacitorsmentioning

confidence: 99%

“…[69][70][71] It was observed that quaternary ammonium salts with small cations could achieve a high EDLC specific capacitance. 69 Furthermore, the salt also plays an important role in affecting the electrochemical window of organic electrolytes. 63,72,73 The ionic liquid, N-butyl-Nmethylpyrrolidinium bis(trifluoromethanesulfonyl) imide (PYR14TFSI) was used to formulate the electrolyte, and EDLCs containing PYR14TFSI in PC exhibited a high operating voltage (up to 3.5 V) and excellent cycling stability.…”

Section: Supercapacitorsmentioning

confidence: 99%

See 1 more Smart Citation

Electrolytes for electrochemical energy storage

Xia

et al. 2017

Mater. Chem. Front.

234

116

View full text Add to dashboard Cite

A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription.For more information, please contact eprints@nottingham.ac.uk Journal NameThis journal is © The Royal Society of Chemistry 20xxJ. Name., 2013, 00, 1-3 | 1 Electrolyte is a key component of electrochemical energy storage (EES) devices and its properties greatly affect the energy capacity, rate performance, cyclability and safety of all EES devices. This article offers a critical review of recent progresses and challenges in electrolyte research and development particularly for supercapacitors and supercapatteries, recharegable batteries (such as lithium-ion and sodium-ion batteries), and redox flow batteries (including fuel cells in a broad sense). The review will focus on liquid electrolytes, particularly aqueous and organic electrolytes, ionic liquids and molten salts. Influences of electrolyte properties on the performances of different EES devices are discussed in detail.

show abstract

Section: Supercapacitorsmentioning

confidence: 99%

Section: Supercapacitorsmentioning

confidence: 99%

Electrolytes for electrochemical energy storage

Xia

et al. 2017

Mater. Chem. Front.

234

116

View full text Add to dashboard Cite

show abstract

“…The conductivity is affected by the size of the ion, the structure of the alkyl chain, and the viscosity of the electrolyte solution. We did not observe a relationship between the conductivity and capacitance [13,14] For example, the conductivity of C6 is 10% lower than that of C8, as shown in Fig. 2.…”

Section: Resultsmentioning

confidence: 71%

Effects of Cyclic Structure of Ammonium Ions on Capacitance in Electrochemical Double Layer Supercapacitors

Hong¹,

Hwang²,

Lee³

et al. 2017

Journal of Electrochemical Science and Technology

Self Cite

View full text Add to dashboard Cite

The conductivity of the electrolyte used plays a critical role in the optimization of the performance of electrochemical double layer capacitors. However, when the difference in the conductivities of different electrolytes is not significant (only 10-20%), the conductivity has little effect on the capacitance. On the other, unlike the conductivity and viscosity of the electrolyte, the cation size directly influences the capacitance. Cyclic ions have a smaller effective radius than that of the corresponding acyclic ions because the acyclic alkyl groups have a greater number of conformational degrees of freedom, such as the rotational, bending, and stretching modes. Consequently, because of the smaller effective size of the cyclic ions, cells containing electrolytes with such ions exhibit higher capacitances than do those with their acyclic counterparts.

show abstract

“…These electrolytes also responded rapidly during the discharge cycle, as evidenced by the high discharge currents in the early stages of the discharge cycle. This CV curve feature is characteristic of small and mobile cations [13]. The LSV curves obtained using the electrolytes (Fig.…”

Section: Resultsmentioning

confidence: 88%