3D flower-like MOF-derived NiCo-LDH integrated with Ti3C2Tx for high-performance pseudosupercapacitors

Wang, Yanzhong; Shi, Chenjing; Chen, Yanjun; Li, Dan; Wu, Guangping; Wang, Chao; Guo, Li

doi:10.1016/j.electacta.2021.138040

Cited by 56 publications

(21 citation statements)

References 54 publications

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“…Moreover, the detailed capacity contribution at a given scan rate can be acquired with the formula of i(V) = k 1 v + k 2 v 1/2 , where i represents the current, k 1 v represents the capacitive contribution, and k 2 v represents a diffusion-controlled contribution. 51 Figure S3b displays the capacitive contribution at 20 mV s −1 , in which the capacitive contribution (red regions) accounted for 35% of the total capacity. Figure S3c illustrates the capacitive contribution at different sweep rates.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Design and Preparation of NiCoMn Ternary Layered Double Hydroxides with a Hollow Dodecahedral Structure for High-Performance Asymmetric Supercapacitors

Chen

Yang

et al. 2022

ACS Appl. Energy Mater.

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Layered double hydroxides (LDHs) are prospective cathode materials for supercapacitors because of their outstanding theoretical specific capacitance and unique layered structure. However, the finite electroactive sites and cation species confine their practical application in supercapacitors. In this work, a hollow polyhedral ternary metallic Ni2CoMn1-LDH is prepared using zeolitic imidazolate framework-67 (ZIF-67) as the template. It has been found that the hollow dodecahedral structure constructed by thin nanosheets endows the Ni2CoMn1-LDH sample with abundant specific area and more ion-/electron-transport channels, which facilitate ion/electron transfer. Meanwhile, Ni2CoMn1-LDH can achieve the maximum synergistic effect of the different transition metals due to its optimal composition and content, which is conducive to improving the electrochemical behavior of supercapacitors. Benefiting from the advantages of their structure and composition, the as-prepared Ni2CoMn1-LDH electrode presents an excellent capacitance performance of 1634.4 F g–1 at 0.5 A g–1. Moreover, an asymmetric supercapacitor fabricated with a Ni2CoMn1-LDH cathode and an activated carbon (AC) anode reveals a good specific capacitance of 123.4 F g–1 at 1 A g–1 and a maximum energy density of 43.9 Wh kg–1 at a power density of 800 W kg–1. Therefore, constructing ternary LDHs with a unique hollow structure and optimal element composition has a promising prospect in the industrial application of supercapacitors and large-scale energy-storage devices.

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Section: ■ Experimental Sectionmentioning

confidence: 99%

Design and Preparation of NiCoMn Ternary Layered Double Hydroxides with a Hollow Dodecahedral Structure for High-Performance Asymmetric Supercapacitors

Chen

Yang

et al. 2022

ACS Appl. Energy Mater.

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“…Surprisingly, CoFe-LDH/P2//AC delivers the high energy density of 75.9 Wh kg -1 at 1124 W kg -1 which is significantly improved performance as compared with previously reported values, such as NiCoFe-LDH/Ti 3 C 2 //rGO (54.4 Wh kg -1 @ 895.1 W kg -1 ), [53] MgCo 2 O 4 @CoFe-LDH/NF-3//AC (60.82 Wh kg -1 @ 725 W kg -1 ), [54] Ni 3 S 2 /CoFe@LDH/NF (47.31 Wh kg -1 @ 986 W kg -1 ), [55] MXene@Ni-Mn LDH//AC (44.7 Wh kg -1 @ 800 W kg -1 ), [56] Co(OH)@NiCo-LDH//RGO (49.34 Wh kg -1 @ 865 W kg -1 ), [57] Ni 1 Co 1 -LDH@ACF//AC (52.2 Wh kg -1 @ 800 W kg -1 ), Mn-Co LDH@CDs//AC (65 Wh kg -1 @ 666 W kg -1 ), [58] ZIF-67@LDH//AC (64.3 Wh kg -1 @ 373 W kg -1 ), [59] CoZnAl-LDH//AC (36 Wh kg -1 @ 400 W kg -1 ), [60] NiCo-LDH/Ti 3 C 2 T x //AC (44.6 Wh kg -1 @ 852.5 W kg -1 ). [61] The CoFe-LDH/P2//AC possesses high rate-performance by achieving a large power density of 11.5 kW kg -1 at 41 Wh kg -1 . Cycling stability is another imperative factor for practical rechargeable energy storage devices.…”

Section: Discussionmentioning

confidence: 99%

Unprecedented Dual Role of Polyaniline for Enhanced Pseudocapacitance of Cobalt–Iron Layered Double Hydroxide

Mahmood

Zhao

Javed

et al. 2022

Macromol. Rapid Commun.

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Creating nanosized pores in layered materials can increase the abundant active surface area and boost potential applications of energy storage devices. Herein, a unique synthetic strategy based on polyaniline (PANI) doped 2D cobalt-iron layered double hydroxide (CoFe-LDH/P) nanomaterials are designed, and the formation of pores at low temperature (80 °C) is developed. It is found that the optimized concentration of PANI creates the nanopores on the CoFe-LDH nanosheets among all other polymers. The well-ordered pores of CoFe-LDH/P allow the high accessibility of the redox-active sites and promote effective ion diffusion. The optimized CoFe-LDH/P2 cathode reveals a specific capacitance 1686 (1096 Cg −1 ) and 1200 Fg −1 (720 Cg −1 ) at 1 and 30 Ag −1 respectively, a high rate capability (71.2%), and a long cycle life (98% over 10 000 cycles) for supercapacitor applications. Charge storage analysis suggests that the CoFe-LDH/P2 electrode displays a capacitive-type storage mechanism (69% capacitive at 1 mV s −1 ). Moreover, an asymmetric aqueous supercapacitor (CoFe-LDH/P2//AC) is fabricated, delivering excellent energy density (75.9 Wh kg −1 at 1124 W kg −1 ) with outstanding stability (97.5%) over 10 000 cycles. This work opens a new avenue for designing porous 2D materials at low temperature for aqueous energy storage devices.

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“…Fortunately this situation can be partially overcome by transforming MOFs into other materials. The types of MOF-derived electrocatalysts include oxides, 89 sulfides, 90 phosphides, 91 nitrides, 92 layered double hydroxides (LDHs), 93 and monoatomic electrocatalysts. 94 These MOF-derived materials inherit the metal composition, large porosity, surface area and even the particular crystal morphology, while exhibiting a much diminished electrical resistance.…”

Section: Mof-derived Materialsmentioning

confidence: 99%

First-row transition metal-based materials derived from bimetallic metal–organic frameworks as highly efficient electrocatalysts for electrochemical water splitting

Sanati

Morsali

Garcı́a

2022

Energy Environ. Sci.

174

100

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3D flower-like MOF-derived NiCo-LDH integrated with Ti3C2Tx for high-performance pseudosupercapacitors

Cited by 56 publications

References 54 publications

Design and Preparation of NiCoMn Ternary Layered Double Hydroxides with a Hollow Dodecahedral Structure for High-Performance Asymmetric Supercapacitors

Design and Preparation of NiCoMn Ternary Layered Double Hydroxides with a Hollow Dodecahedral Structure for High-Performance Asymmetric Supercapacitors

Unprecedented Dual Role of Polyaniline for Enhanced Pseudocapacitance of Cobalt–Iron Layered Double Hydroxide

First-row transition metal-based materials derived from bimetallic metal–organic frameworks as highly efficient electrocatalysts for electrochemical water splitting

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