Co-ZIF derived porous NiCo-LDH nanosheets/N doped carbon foam for high-performance supercapacitor

Liu, Yuexin; Wang, Yanzhong; Shi, Chenjing; Chen, Yanjun; Li, Dan; He, Zhenfeng; Wang, Chao; Guo, Li; Ma, Jianmin

doi:10.1016/j.carbon.2020.04.084

Cited by 224 publications

(80 citation statements)

References 60 publications

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“…As shown in Figure a, ZIF67 shows typically a group of sharp peaks, while the Ni‐etching and Co‐etching give rise to the broadened peaks locating at around 11.5°, 23.37°, 33.9°, and 60.0°, referring to the (003), (006), (009), and (110) facets, respectively, in good consistent with those in literatures. [ 17 ] This compositional variation confirms the successful preparation of LDH materials, which can be also reflected by the color change among the samples in Figure S3, Supporting Information. The parent ZIF67 shows a typical purple color, which turns into light green and light rose color after the Ni‐etching and Co‐etching, respectively.…”

Section: Resultssupporting

confidence: 64%

Hierarchical Micro‐Nanoclusters of Bimetallic Layered Hydroxide Polyhedrons as Advanced Sulfur Reservoir for High‐Performance Lithium–Sulfur Batteries

Qiu

Luo

et al. 2021

Advanced Science

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Rational construction of sulfur electrodes is essential in pursuit of practically viable lithium-sulfur (Li-S) batteries. Herein, bimetallic NiCo-layered double hydroxide (NiCo-LDH) with a unique hierarchical micro-nano architecture is developed as an advanced sulfur reservoir for Li-S batteries. Compared with the monometallic Co-layered double hydroxide (Co-LDH) counterpart, the bimetallic configuration realizes much enriched, miniaturized, and vertically aligned LDH nanosheets assembled in hollow polyhedral nanoarchitecture, which geometrically benefits the interface exposure for host-guest interactions. Beyond that, the introduction of secondary metal intensifies the chemical interactions between layered double hydroxide (LDH) and sulfur species, which implements strong sulfur immobilization and catalyzation for rapid and durable sulfur electrochemistry. Furthermore, the favorable NiCo-LDH is architecturally upgraded into closely packed micro-nano clusters with facilitated long-range electron/ion conduction and robust structural integrity. Due to these attributes, the corresponding Li-S cells realize excellent cyclability over 800 cycles with a minimum capacity fading of 0.04% per cycle and good rate capability up to 2 C. Moreover, highly reversible areal capacity of 4.3 mAh cm −2 can be achieved under a raised sulfur loading of 5.5 mg cm −2. This work provides not only an effective architectural design but also a deepened understanding on bimetallic LDH sulfur reservoir for high-performance Li-S batteries.

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Section: Resultssupporting

confidence: 64%

Hierarchical Micro‐Nanoclusters of Bimetallic Layered Hydroxide Polyhedrons as Advanced Sulfur Reservoir for High‐Performance Lithium–Sulfur Batteries

Qiu

Luo

et al. 2021

Advanced Science

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“…Even at a high-power density of 8000 W kg −1 , the energy density can maintain 65.4 W h kg −1 . This result is much better than the previously reported values in the literature, such as NiCo-LDH/10// CNT (36.1 W h kg −1 at 649 W kg −1 ), [44] NiCo-LDH@NCF//AC (41.5 W h kg −1 at 750 W kg −1 ), [30] CCCH@NiCo-LDH NWAs@ Au-CuO/Cu//VN/CFs (34.97 W h kg −1 at 1410 W kg −1 ), [34] NiCo-LDH//AC (79.6 W h kg −1 at 338 W kg −1 ), [45] CoNi 2 -OH/ L -Asn//N-rGO (64.9 W h kg −1 at 799.9 W kg −1 ), [46] Ni-Co-S/G// PCNS (43.2 W h kg −1 at 800 W kg −1 ), [43] and Ni-Co LDH/ NiMoS x //Fe 2 O 3 /rGO (25.3 W h kg −1 at 5357.6 W kg −1 ). [31] The long-term cycling stability test of the CoNi-BDC-0.02//AC HSC device at a current density of 5 A g −1 is shown in Figure 5i.…”

Section: Resultscontrasting

confidence: 56%

“…The characteristic peaks situated at 531.8, 531.2, and 529.9 eV in Figure S10a, Supporting Information, are attributed to the oxygen of chemical adsorption, OH − in CoNi-LDH, and the metal oxide peaks (such as Co-O and Ni-O), respectively. [30][31] In addition, two new peaks situated at 533.1 and 532.4 eV in Figure S10b, Supporting Information, are attributed to C-O and CO, which verifies that the H 2 BDC has been successfully inserted in CoNi-LDH. [32] The pore structures of CoNi-LDH and CoNi-BDC-0.02 were tested with nitrogen adsorption-desorption isotherms.…”

Section: Resultsmentioning

confidence: 57%

Layered Double Hydroxide Hollowcages with Adjustable Layer Spacing for High Performance Hybrid Supercapacitor

Xia

Liang

et al. 2021

Small

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Layered double hydroxides (LDHs) have been considered as promising electrodes for supercapacitors due to their adjustable composition, designable function and superior high theoretic capacity. However, their experimental specific capacity is significantly lower than the theoretical value due to their small interlayer spacing. Therefore, obtaining large interlayer spacing through the intercalation of large‐sized anions is an important means to improve capacity performance. Herein, a metal organic framework derived cobalt‐nickel layered double hydroxide hollowcage intercalated with different concentrations of 1,4‐benzenedicarboxylic acid (H2BDC) through in‐situ cationic etching and organic ligand intercalation method is designed and fabricated. The superior specific capacity and excellent rate performance are benefit from the large specific surface area of the hollow structure and increasing interlayer spacing of LDH after H2BDC intercalation. The sample with the largest layer spacing displays a maximum specific capacity of 229 mA h g−1 at 1 A g−1. In addition, the hybrid supercapacitor assembled from the sample with the largest layer spacing and active carbon electrode has a maximum specific capacity of 158 mA h g−1 at 1 A g−1; the energy density is as high as 126.4 W h kg−1 at 800 W kg−1 and good cycle stability.

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“…The lattice with a spacing of 0.262 nm in Fig. 3 b-1 corresponds to the (012) crystal plane of NiCo-LDHs [ 45 ]. The observed circle points to the (107) crystal plane of NiCo-LDHs in high-resolution TEM images of S-4 (Fig.…”

Section: Resultsmentioning

confidence: 99%

Construction of 1D Heterostructure NiCo@C/ZnO Nanorod with Enhanced Microwave Absorption

et al. 2021

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Layered double hydroxides (LDHs) have a special structure and atom composition, which are expected to be an excellent electromagnetic wave (EMW) absorber. However, it is still a problem that obtaining excellent EMW-absorbing materials from LDHs. Herein, we designed heterostructure NiCo-LDHs@ZnO nanorod and then subsequent heat treating to derive NiCo@C/ZnO composites. Finally, with the synergy of excellent dielectric loss and magnetic loss, an outstanding absorption performance could be achieved with the reflection loss of − 60.97 dB at the matching thickness of 2.3 mm, and the widest absorption bandwidth of 6.08 GHz was realized at 2.0 mm. Moreover, this research work provides a reference for the development and utilization of LDHs materials in the field of microwave absorption materials and can also provide ideas for the design of layered structural absorbers.

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Co-ZIF derived porous NiCo-LDH nanosheets/N doped carbon foam for high-performance supercapacitor

Cited by 224 publications

References 60 publications

Hierarchical Micro‐Nanoclusters of Bimetallic Layered Hydroxide Polyhedrons as Advanced Sulfur Reservoir for High‐Performance Lithium–Sulfur Batteries

Hierarchical Micro‐Nanoclusters of Bimetallic Layered Hydroxide Polyhedrons as Advanced Sulfur Reservoir for High‐Performance Lithium–Sulfur Batteries

Layered Double Hydroxide Hollowcages with Adjustable Layer Spacing for High Performance Hybrid Supercapacitor

Construction of 1D Heterostructure NiCo@C/ZnO Nanorod with Enhanced Microwave Absorption

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