Thermal dynamic study of the gradual desolvation in submicropores for carbon-based supercapacitor at low temperature

Wu, Jianchun; Liu, Chao; Zhou, Haitao; Liu, Menghao; Zhang, Dong; Yu, Chongchen; Zhang, Xin; Gao, Hongquan; Yang, Jianhong

doi:10.1007/s11581-020-03575-9

Cited by 3 publications

(3 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As curves go from stage 1 to stage 2 and then to stage 3, the specific capacitance retentions suddenly increase and then suddenly decrease. These changes may be due to ion desolvation occurring, which allows ions to enter micropores to generate capacitance (Urita et al, 2014;Wu et al, 2020b), and then micropores are filled with ions and no capacitance is generated. Besides, all their specific capacitance retentions are larger than 92.0%, indicating that the cells corresponding to these nitrogen modified EP-based PCs can maintain excellent longcycle performance.…”

Section: Resultsmentioning

confidence: 99%

Preparation of High-Performance Enteromorpha Prolifera–Based Porous Carbons by Nitrogen Modification and Their Electrochemical Performance

Han

Teng

et al. 2021

Front. Energy Res.

View full text Add to dashboard Cite

This study presents a novel method to improve the electrochemical performance of porous carbons (PCs) by simply adjusting the elemental composition of their precursors with nitrogen-rich materials as additives. Nitrogen-modified enteromorpha prolifera–based (EP-based) PCs are prepared from EP and urea (or melamine). Overall, compared with the control PC without nitrogen modification, their pore structures and surface chemical properties present similar improvement. When used in supercapacitors, their specific capacitances increase by approximately 22% due to their significant development of mesopores at 2.5–7.0 nm, which increases the effective surface areas. With an appropriate amount of nitrogen-containing or oxygen-containing functional groups maintaining surface wettability, the notable increase of graphitized N improves their conductivity. Due to the higher graphitization degrees, their resistances are reduced. With more mesopores transporting ions, they exhibit excellent high-rate capacitive performance. Moreover, they show remarkable long cycle performance with the specific capacitance retention of larger than 92% after 10,000 cycles.

show abstract

Section: Resultsmentioning

confidence: 99%

Preparation of High-Performance Enteromorpha Prolifera–Based Porous Carbons by Nitrogen Modification and Their Electrochemical Performance

Han

Teng

et al. 2021

Front. Energy Res.

View full text Add to dashboard Cite

show abstract

“…The selection of the pore size becomes particularly important. Density functional theory (DFT) simulations were utilized by Wu et al [124] to research the TEABF 4 /ACN system and found that when there are four solvent molecules for ions, the maximum ion size is 1.3 nm. When samples of submicroporous carbon nano-sponge materials (>1.3 nm) are chosen, fully solvated ions can directly enter the pores without desolvation.…”

Section: Electrode-electrolyte Interfaces In Supercapacitorsmentioning

confidence: 99%

“…When choosing FAC750 with the coexistence of small micropores and submicropores, the submicropores are beneficial to the gradual shedding of the solvation layer at low temperatures. In the gradual desolvation process, each step needs to overcome the lower energy barrier of 0.19-0.31 eV, and finally can enter the small micropores of 0.6 nm, and the total gradual desolvation time is in the range of 10 −4 s [124]. Xu et al [114] proposed that this mechanism is temperature-dependent.…”

Section: Electrode-electrolyte Interfaces In Supercapacitorsmentioning

confidence: 99%

Low-temperature electrolytes for electrochemical energy storage devices: bulk and interfacial properties

Yang,

Chen,

et al. 2023

Flex. Print. Electron.

View full text Add to dashboard Cite

The optimization of electrochemical energy storage devices (EES) for low-temperature conditions is crucial in light of the growing demand for convenient living in such environments. Sluggish ion transport or the freezing of electrolytes at the electrode-electrolyte interface are the primary factors that limit the performance of EES under low temperatures, leading to fading of capacity and instability in device performance. This review provides a comprehensive overview of antifreeze strategies for various electrolytes (including aqueous electrolytes, organic electrolytes, and ionic liquids), and optimization methods for ion transport at the electrolyte-electrode. Additionally, the main challenges and forward-looking views are highlighted on the design and development of low-temperature electrolytes and EES devices.

show abstract

Amorphous carbon interweaved mesoporous all-carbon electrode for wide-temperature range supercapacitors

Qiu

Wang

Jin

et al. 2022

Electrochimica Acta

View full text Add to dashboard Cite

Thermal dynamic study of the gradual desolvation in submicropores for carbon-based supercapacitor at low temperature

Cited by 3 publications

References 32 publications

Preparation of High-Performance Enteromorpha Prolifera–Based Porous Carbons by Nitrogen Modification and Their Electrochemical Performance

Preparation of High-Performance Enteromorpha Prolifera–Based Porous Carbons by Nitrogen Modification and Their Electrochemical Performance

Low-temperature electrolytes for electrochemical energy storage devices: bulk and interfacial properties

Amorphous carbon interweaved mesoporous all-carbon electrode for wide-temperature range supercapacitors

Contact Info

Product

Resources

About