Synthesis and Low‐Temperature Capacitive Performances of Ternary Active Site CoNiFe Hydroxides

L, Su; Song, Zuwei; Guo, Jialiang; Li, Jiujiang

doi:10.1002/slct.201700071

Cited by 9 publications

(5 citation statements)

References 35 publications

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“…Compared with CoNiFe-LDH, CNTs/CoNiFe-LDH composite had a higher capacity and superior rate retention, which could be attributed to the large surface area of CNTs/CoNiFe-LDH and the synergistic effect of carbon material and CoNiFe-LDH. The excellent rate retention of CNTs/CoNiFe-LDH composite was also superior to the reported CoNiFe-LDH [ 21 , 23 , 24 , 25 ] and CNTs/Ni Co LDH composites (58% from 1 to 20 A g −1 ) [ 32 ] and the Ce-NiCo-LDH/CNT electrode (67.9% from 1 to 10 A g −1 ) [ 31 ] ( Table S1 ). Energy efficiency (η E ) is an important parameter to evaluate electrode materials, which can be determined from the GCD curves using the relation: η E = E int/D /E int/C , where E int/D and E int/C refer to the discharge and charge energy of the electrode or device [ 47 , 48 ].…”

Section: Resultsmentioning

confidence: 89%

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Synthesis of CNTs/CoNiFe-LDH Nanocomposite with High Specific Surface Area for Asymmetric Supercapacitor

et al. 2021

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Ternary layered double hydroxide (LDH) materials have shown promising application in hybrid supercapacitors. However, the low electrical conductivity of LDHs is still a restriction to their performance. Herein, carbon nanotubes/cobalt–nickel–iron LDH (CNTs/CoNiFe-LDH) hybrid material was prepared by a one-step hydrothermal approach for the first time. The presence of CNTs improved the conductivity and surface area of the electrode, leading to an enhanced electrochemical performance. The CNTs/CoNiFe-LDH hybrid electrode exhibited high specific capacity 170.6 mAh g−1 at a current density of 1 A g−1, with a capacity retention of 75% at 10 A g−1. CNTs/CoNiFe-LDH//AC asymmetric supercapacitor (ASC) was also assembled, which had high specific capacitance (96.1 F g−1 at the current density of 1 A g−1), good cycling stability (85.0% after 3000 cycles at 15 A g−1) and high energy density (29.9 W h kg−1 at the power density of 750.5 W kg−1). Therefore, the CNTs/CoNiFe-LDH material could be used for hybrid supercapacitor electrodes.

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Section: Resultsmentioning

confidence: 89%

“…The capacitance of NiCoFe-LDH is 903 F g −1 at 1 A g −1 [ 24 ]. Su et al prepared NiCoFe-LDH materials and investigated their electrochemical performance in low temperature [ 25 ]. Even though high specific capacity of NiCoFe-LDH was reported, the performances of asymmetric supercapacitor devices have not been studied.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of CNTs/CoNiFe-LDH Nanocomposite with High Specific Surface Area for Asymmetric Supercapacitor

et al. 2021

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“…As a result, the operating temperature of EES devices using conventional aqueous electrolytes is generally above −20 °C. [40][41][42][43] To enable the EES devices to operate at lower temperatures, the first task is to ensure that the aqueous electrolytes do not freeze. In this context, various strategies have been developed to depress the freezing point of aqueous electrolytes.…”

Section: Aqueous Electrolytesmentioning

confidence: 99%

Ions Transport in Electrochemical Energy Storage Devices at Low Temperatures

Sun

Liu

et al. 2021

Adv Funct Materials

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The operation of electrochemical energy storage (EES) devices at low temperatures as normal as at room temperature is of great significance for their lowtemperature environment application. However, such operation is plagued by the sluggish ions transport kinetics, which leads to the severe capacity decay or even failure of devices at low-temperature conditions. In this review, the difficulties of ions transport in electrolyte, electrolyte/electrode interface, and electrode material at low temperatures are discussed in depth, and the reported strategies to solve the corresponding problems are surveyed subsequently. Finally, the views on how to build high-performance low-temperatureavailable EES devices as well as their development directions are put forward.

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“…At present, a great deal of research focuses on developing low-temperature electrolytes. − Qamar Abbas et al prepared a 5 mol kg –1 binary mixture of cholinium chloride (HO–CH 2 –CH 2 –N(CH 3 ) 3+ Cl – )/H 2 O, which can operate at −40 °C . However, the high freezing point of water and low decomposition voltage make the voltage window and operating temperature of water-based electrolytes undesirable. − Shi et al used propylene carbonate as a solvent and salt spiro-(1,1′)-bipyrrolidine difluorosulfonimide as the electrolyte to prepare an organic low-temperature electrolyte. The electrolyte window can reach 2.7 V, but the working temperature can only reach −40 °C .…”

Section: Introductionmentioning

confidence: 99%

Effect of Pore Structure on the Low-Temperature Performance of Activated Carbon-Based Supercapacitors

Ding,

Zhu,

Hou

et al. 2024

ACS Appl. Energy Mater.

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Electrochemical double-layer capacitors (EDLCs) have attracted considerable attention due to their high power density and long cycle life. However, the wide temperature range performance of EDLC, especially the ultralow-temperature performance, cannot meet the increasing market demand. The pore structure of the electrode material activated carbon (AC) is a key factor affecting the performance of EDLC in ultralowtemperature environments. In this work, we screened four ACs with different pore structures for EDLC at low temperatures. MAC-2 exhibits optimal low-temperature electrochemical performance compared to the other materials (YP-50F, CMK-3, and MAC-1), which is attributed to the high effective pore volume (0.778 cm 3 g −1 in the 0.8−4.0 nm range) and the hierarchical pore structure, with the 0.8−2.0 nm pore volume accounting for 76.33% of the micropore volume and the 2.0−4.0 nm pore volume accounting for 35.99% of the mesopore volume. The EDLC based on MAC-2 provides a high specific capacitance of 30.94 F g −1 at 0.5 A g −1 at −60 °C and an excellent capacitance retention rate of 91.3% at −35 °C after 10,000 cycles at 1.0 A g −1 . This screening provides guidance for the design direction of electrode materials for EDLC at low temperatures.

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Synthesis and Low‐Temperature Capacitive Performances of Ternary Active Site CoNiFe Hydroxides

Cited by 9 publications

References 35 publications

Synthesis of CNTs/CoNiFe-LDH Nanocomposite with High Specific Surface Area for Asymmetric Supercapacitor

Synthesis of CNTs/CoNiFe-LDH Nanocomposite with High Specific Surface Area for Asymmetric Supercapacitor

Ions Transport in Electrochemical Energy Storage Devices at Low Temperatures

Effect of Pore Structure on the Low-Temperature Performance of Activated Carbon-Based Supercapacitors

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