AC Hybrid Supercapacitor Research Articles

Stacked Lamellar Matrix Enabling Regulated Deposition and Superior Thermo‐Kinetics for Advanced Aqueous Zn‐Ion System under Practical Conditions

AbstractZinc anodes have attracted widespread attention for their intrinsic safety, low cost, and abundant resources, but still suffer from severe irreversibility due to spontaneous corrosion and nonplanar dendrite formation in aqueous electrolytes. In this work, a 3D stacked lamellar matrix (SLM) composed of ZnF2/Zn3(PO4)2/CFX is elaborately designed on a Zn substrate via simple chemical/electrochemical reactions, delivering enhanced thermodynamic stability and rapid zinc ions transport kinetics. The abundant ion conduction channels in SLM could also redistribute Zn2+ ions flux and further suppress the dendrite growth. With these synergetic effects, the SLM‐Zn anodes enable exceptional performance, including a high depth of discharge (90%) in a Zn|Zn symmetrical cell for 187 h, steady charge/discharge process (94.1% retention of SLM‐Zn|MnO2 full cell for 1000 cycles at a harsh rate of 15 C), and low negative/positive capacity ratio (≈3.3) in SLM‐Zn|AC hybrid supercapacitor with limited Zn anode (10 µm) and high‐load cathode (≈1.77 mA h cm−2), which greatly promotes the application of aqueous Zn‐ion energy system under practical conditions.

Ammonium vanadium oxide framework with stable NH4+ aqueous storage for flexible quasi-solid-state supercapacitor

Aqueous energy storage systems show great promise because of their merits of high safety, low cost and environmentally friendliness. Huge efforts, in recent years, have been focused on these systems employing metal cations as charge carriers. In aqueous rechargeable batteries, a paradigm shift has recently moved to nonmetal ions as charge carriers (e.g.: H+, NH4+). Herein, we report an ammonium vanadium oxide framework (NVO) displaying excellent NH4+ storages. The capacitance and cycle performance of NVO are greatly improved using NH4Cl/PVA gel electrolyte. In three-electrode configuration, at 0.5 A g−1, the NVO electrode delivers a specific capacitance of 339 F·g−1 (610 C·g−1, 169 mAh·g−1) in NH4Cl/PVA electrolyte, which is much higher than the value of 268 F·g−1 (483 C·g−1, 134 mAh·g−1) in NH4Cl electrolyte. It shows 71% capacitance retention after 14,000 cycles in NH4Cl/PVA electrolyte. The intercalation pseudocapacitance and double layer capacitance are contributed to the charge storage mechanism of NVO. The flexible quasi-solid-state NVO//AC hybrid supercapacitor is assembled and displays outstanding electrochemical performances with high capacitance, long lifespan and practical applications with good mechanical stability and flexibility in various bending states and excellent series and parallel performance. This work not only demonstrates that NVO has great potential for NH4+ storages, but also sheds a light on NH4Cl/PVA electrolyte for flexible aqueous NH4+-supercapacitors.

Fishbone-like Ni3S2/Co3S4 integrated with nickel MOF nanosheets for hybrid supercapacitors

It is still a challenge to improve the electronic conductivity and expose more active sites of metal-organic frameworks (MOFs). Herein, the fishbone-like Ni3S2/Co3S4 grown on nickel foam (NCS/NF) was employed as a conductive support for in-situ growing nickel MOF (NiMOF) nanosheets to enhance their electrochemical properties. The as-prepared NiMOF@Ni3S2/Co3S4/NF (NiMOF@NCS/NF) exhibited a high areal specific capacity of 8.7C cm−2 at 1 mA cm−2, and the capacity retention remains 65% at 50 mA cm−2. Furthermore, the assembled NiMOF@NCS/NF//AC hybrid supercapacitor achieves an intriguing energy density of 58.8 Wh kg−1 at the power density of 781.3 W kg−1, and the capacity retention remains 96.2% after 10,000 charge/discharge cycles. The prominent electrochemical performance of NiMOF@NCS/NF can be ascribed to the remarkable electronic conductivity and specific capacity of Ni3S2/Co3S4 composites coupled with their three-dimensional porous structure.

Boosting the energy density of iron-cobalt oxide based hybrid supercapacitors by redox-additive electrolytes

Due to the increasing requirement of small electronic devices for high energy output and long-term lifespan, hybrid supercapacitor device with ultrahigh energy density and long cycle stability has attracted great attention in recent decades. Herein, we constructed an aqueous FeCo2O4 needle-like array (NLA)/CC-based hybrid supercapacitor using K3[Fe(CN)6] as an electrolyte additive to enhance the pseudocapacitor performance. The extensive charge storage kinetics and the electron transport mechanism of the FeCo2O4-NLA in KOH+K3[Fe(CN)6] electrolyte are discussed. The FeCo2O4-NLA soaked in a 3 M KOH + 0.05 M K3[Fe(CN)6] mixed solution shows high specific capacitance (259.33 mA h g−1 at 2 A g−1), low charge transfer resistance and internal resistance, and long-term cycle stability (over 80.7% of capacitance retention at 10 A g−1 after 5000 cycles). An aqueous FeCo2O4-NLA//KOH+K3[Fe(CN)6]//AC hybrid supercapacitor device is assembled, which presents increased specific capacitance, long cycle stability (86.4% of the initial capacitance), and ultrahigh energy density (58.8 W h kg−1 @750.1 W kg−1). This work may provide a new approach to obtain high-performance energy storage devices.

Core−shell NiSe/Ni(OH)2 with NiSe nanorods and Ni(OH)2 nanosheets as battery-type electrode for hybrid supercapacitors

Novel core−shell nanostructure electrodes benefit from the excellent properties of their constituent materials, as well as the synergy between them. However, it is challenging to fabricate such structures efficiently. In this study, NiSe nanorods were fabricated using Ni foam as the conductive substrate and reactant via a one-step hydrothermal process, and Ni(OH)2 nanosheets were coated on the surface of the nanorods via one-step electrodeposition. The effect of the structure and morphology on the properties of the material was explored using scanning electron microscopy, x-ray diffraction, and electrochemical technology. The obtained core−shell NiSe/Ni(OH)2 exhibited an areal capacity of 1.89 mAh cm−2 at a current density of 5 mA cm−2. The assembled NiSe/Ni(OH)2//AC hybrid supercapacitor exhibited excellent energy and power densities, indicating that NiSe/Ni(OH)2 has great potential for use as a battery-type electrode in energy storage systems.

A high-energy, long cycle life aqueous hybrid supercapacitor enabled by efficient battery electrode and widened potential window

For the development of high-performance aqueous hybrid supercapacitor, the exploration of high-rate battery electrode and breakthrough of potential window are urgently needed. In this work, N-doped carbon coated LiMn2O4 nanoparticles (LMO@C) have been designed and successfully fabricated, and “water-in-salt” electrolyte is applied. The as-prepared LMO@C delivers a high specific capacitance of 688 F g−1 at the scan rate of 0.5 mV s−1 and retains 258 F g−1 at 50 mV s−1 as cathode in 5 M LiTFSI aqueous electrolyte. With an enlarged working potential of 2.5 V, LMO@C//AC hybrid supercapacitor shows a high energy density of 95.3 W kg−1, and 95% of initial capacitance retention after 15,000 cycles. The excellent electrochemical performance suggests that the carbon coated lithium manganate nanocomposite and high-concentration electrolyte could be potential candidates for practical aqueous hybrid energy storage devices.

Facile synthesis of Ni-Co layered double hydroxide with nitrates as interlayer anions via an oxidation-induced anion intercalation process for hybrid supercapacitors

Ni-Co layered double hydroxide (NCLDH) with nitrate anions as interlayer counter ions was obtained via an oxidation-induced anion intercalation process. The optimization on the tunable proportion between divalent and trivalent metal cations in NCLDH host layers is realized in the dependence on the regulation of the additive amount of hydrogen peroxide as an oxidizing agent. The increase of trivalent metal cations facilitates the intercalation of nitrate anions into the interlamellar region between NCLDH host layers. Importantly, the electrostatic interaction between NCLDH host layers and interlayer anions results in the formation of hierarchical flower-like morphologies towards the enhancement of specific surface areas. Moreover, the increase in number of interlayer nitrate anions expands effectively interplanar spacing between NCLDH host layers. Remarkably, this unique structure not only accelerates the diffusion process of active hydroxide anions in the bulk phase of LDH, but also strengthens the stability of the hierarchical structure during electrochemical reactions. The electrochemical evaluation shows that NCLDH-16 achieves a superior specific capacity of 802 C g−1 at a current density of 1 A g−1 with a capacity retention of 86.7% as the increase of current densities to 10 A g−1. The NCLDH-16//AC hybrid supercapacitor delivers a maximum energy density of 37.6 Wh kg−1 at a power density of 800 W kg−1 as well as still retains 87.4% of the initial capacitance after 10 000 cycles, suggesting great potential in practical energy storage devices.

Hierarchical Ni2P@Ni(OH)2 architectures supported on carbon cloth as battery-type electrodes for hybrid supercapacitors with boosting specific capacitance and cycle stability

In this work, a novel binder-free electrode, in which three-dimensional porous Ni2P@Ni(OH)2 nanosheet arrays were in situ grown on carbon cloth (CC), is rationally designed for supercapacitor applications. In comparison with Ni2P@CC, the Ni2P@Ni(OH)2@CC electrode represents superior electrochemical characteristics: the gravimetric capacitance and areal capacitance are boosted to be 632 C g−1 and 0.73 C cm−2 at 1 mA cm−2, about 2 and 2.7 times larger than those of Ni2P@CC (321 C g−1 and 0.27 C cm−2), respectively; the rate capability is improved to be 63.3% from 1 to 10 mA cm−2, about 1.5 times larger than Ni2P@CC (42.9%); the cycle stability is enhanced to be 81.4% after 1000 cycles, about 1.6 times larger than Ni2P/CC (51.8%). The assembly Ni2P@Ni(OH)2@CC//AC hybrid supercapacitor device shows high energy density of 23.5 Wh kg−1 at a power density of 1158.0 W kg−1 and good cycling stability of 75.2% maintenance after 5000 cycles. Benefiting from the combined advantages of high electronic conductivity and large specific capacitance of Ni2P, superior anion exchanging/intercalating capacity of Ni(OH)2, excellent flexibility of carbon cloth, and special hierarchical architecture with large surface area, the Ni2P@Ni(OH)2@CC electrode is promised to be a good candidate for supercapacitors.

Nano-sized flexible hollow carbon buffer layer improves capacitance of micro-nano NiS2/C electrode in supercapacitors

Surface modification of electrode materials is considered as an effect method to improve the charge-discharge performances base on the conductivity and structure stability. In this paper, the surfaces of synthetic micro-nano NiS2/C particles were rebuilt by the nano-sized flexible hollow carbon buffer layer (FHCBL). The NiS2/C@FHCBL exhibits excellent capacitances and cycle stability in supercapacitor. The largest specific capacitance of 1872 F g−1 was obtained under density of 1 A g−1, excellent rate performance of 79.1 % retention at 10 A g−1 and cycle performance with 92 % retention after 5000 cycles, which was apparently higher than that of micro-nano NiS2/C electrodes. The fabricated liquid-state NiS2/C@FHCBL||AC hybrid supercapacitor also shows high specific energy and excellent cycling stability with keeping 87.85 % retention after 5000 cycles. Further research shows that the nano-sized flexible hollow carbon buffer layer could not only reveal porous carbon effect, and increase the performances of supercapacitor, but also solve the difficult fill, low active materials mass of porous carbon composites. This research indicates a large kind of materials for potential application in energy storage systems.

MoS2/Ni(OH)2 composites derived from in situ grown Ni-MOF coating MoS2 as electrode materials for supercapacitor and electrochemical sensor

A nickel-based metal-organic framework (Ni-MOF) layer was in situ grown on the surface of the sheet MoS2 to synthesize MoS2@Ni-MOF as a precursor. In order to improve the properties of the precursor material, the final MoS2/Ni(OH)2 material was obtained by alkalizing the precursor material. Supercapacitors and electrochemical sensors were prepared by MoS2/Ni(OH)2 composite material. The test indicates that alkaline treatment of Ni-MOF materials is helpful to improve electrochemical performance. MoS2/Ni(OH)2 material used as supercapacitor electrode has a high specific capacitance of 2192 F g−1 and excellent cyclic stability (the capacitance retention rate remains 85.19% after 10,000 charge/discharge cycles). The hybrid supercapacitor (HSC) was assembled with MoS2/Ni(OH)2 as the positive electrode and activated carbon as the negative electrode. The MoS2/Ni(OH)2//AC HSC device shows an excellent energy density of 50.58 Wh kg−1 at the power density of 800 W·Kg−1. In addition, the MoS2/Ni(OH)2 modified GCE electrode is an excellent electrochemical sensor for the simultaneous determination of hydroquinone (HQ) and catechol (CC). The modified electrode provides wide linear ranges of 1 ∼ 500 and 2 ∼ 400 μM and low detection limits of 0.43 and 0.48 μM for HQ and CC, respectively (S/N=3). The MoS2/Ni(OH)2 material can be applied to supercapacitors and electrochemical sensors, indicating that the material has great potential application value in energy storage and biosensing.

Well-connected NiMoS4 nanosheets and Ni foam skeleton bonded through conductive reduced graphene oxide for highly efficient hybrid supercapacitor

Considering the connected function, high conductivity and electrochemical double layer capacitance properties of reduced graphene oxide (RGO), the NiMoS4 nanosheets were anchored on RGO coated Ni foam by a facile hydrothermal method to obtain the NiMoS4@RGO/Ni foam self-supporting electrode without the extra binders. Surprisingly, the prepared NiMoS4@RGO/Ni foam with unique hierarchical lamellar structure can exhibit the high specific capacity of 408 mAh/g at 0.5 A/g, which can be compared with all relevant NiMoS4 reports. In view of the good supercapacitor performances and practical application feasibility of NiMoS4@RGO/Ni foam, the NiMoS4@RGO/Ni foam//AC hybrid supercapacitor device also can show the comparable energy density of 67.4 Wh/kg at 562.5 W/kg to that of all NiMoS4 based hybrid supercapacitors, as well as the good cycle stability. This work can indeed improve the supercapcaitor properties of NiMoS4 based materials, and be also treated as an important attempt of NiMoS4 based materials for supercapacitors.

Venus flytrap-like hierarchical NiCoMn–O@NiMoO4@C nanosheet arrays as free-standing core-shell electrode material for hybrid supercapacitor with high electrochemical performance

In order to improve the sluggish kinetics of the redox reactions occurring at the battery-type electrodes of hybrid supercapacitors, a Venus flytrap-like hierarchical NiCoMn–O@NiMoO4@C nanosheet arrays electrode material are developed based on three aspects of considerations: 1. The developed NiCoMn-based trimetallic (NiCoMn–O) oxides has better electrical conductivity than any of its bimetallic or monometallic counterparts and the self-decorated nanoneedles on its surface can create more electroactive sites for electrolyte to access. 2 NiMoO4 layer is one of the important redox active materials in this composite since its high electrochemical activity in alkaline solution. 3. Carbon protection shell cannot only enhance the rate capability by shorting the electron transport pathway of the composite but also improve its cycling stability via buffering the volume change during the charge/discharge processes. Consequently, the obtained NiCoMn–O@NiMoO4@C electrode can provide a maximum specific capacitance of 2189.5 F/g (at 0.25 A/g) and 81.6% of its initial specific capacitance can be maintained after 1500 cycles GCD tests (at 6 A/g). The prepared NiCoMn–O@NiMoO4@C//AC hybrid supercapacitor exhibits the maximum energy density of 59.9 Wh/kg (at 0.25 A/g) and its specific capacitance can maintain 88.3% of its initial value after 3000 cycles GCD tests (at 6 A/g).

Tiny Ni0.85Se nanosheets modified by amorphous carbon and rGO with enhanced electrochemical performance toward hybrid supercapacitors

• Ni 0.85 Se@C/rGO composite was synthesized via programmed temperature controlling. • The dual carbon modified structure ensures the electric connection. • The combination of dual carbon provides confinement to inhibit disintegration. • The device exhibits high specific energy, specific power and long-term cycling stability. Considering that electrode materials for supercapacitors suffer poor cycling stability and low electrons transfer at high current density, combination with carbonaceous materialhas has been devoted to strengthen the conductivity and improve the specific power and specific energy. Herein, the Ni 0.85 Se@C/rGO composite with tiny Ni 0.85 Se nanosheeets anchoring on rGO and coated by amorphous carbon has been successfully synthesized via programmed temperature controlling. As combined with dual modified carbon, which not only can ensure the electric connection of all the tiny Ni 0.85 Se nanosheets, but also provide confinement to inhibit disintegration, the Ni 0.85 Se@C/rGO//AC supercapacitor device shows a thrilling specific energy of 45.6 Wh kg −1 and 31.4 Wh kg −1 at specific power of 463.5 W kg −1 and 9.4 kW kg −1 , respectively. With the dual carbon modification of amorphous carbon and rGO, Ni 0.85 Se@C/rGO//AC hybrid supercapacitor device shows satisfactory cycling stability and high specific energy and specific power

Boosting the energy storage performance of cobalt molybdate microspheres constructed from urotropin‐induced ultrathin nanosheets

The CoMoO4 microspheres constructed from ultrathin nanosheets were synthesized by means of a simple chemical precipitation using urotropin (C6H12N4) as a soft template, which were used as the electrode materials for supercapacitors. It was found that the CoMoO4 sample with 3 mmol of added urotropin (vs 1 mmol CoCl2) exhibits the uppermost specific capacity value of 89 mAh/g at a current density of 0.25 A/g due to its unique mesoporous structure and large specific surface area. In addition, a hybrid supercapacitor was established by the CoMoO4 microspheres (positive electrode) and activated carbon (AC, negative electrode). The obtained CoMoO4//AC hybrid supercapacitor possesses a specific energy value of 34 Wh/kg at 375 W/kg. Most importantly, this device owns excellent cycle stability with no capacity decay observed after 10 000 cycles. These good electrochemical properties of CoMoO4 microspheres are promising in the practical use fields.

In-situ growth of interconnected NiS2/MoS2 nanowires supported on Ni foam as binder-free electrode for hybrid supercapacitor

Transition metal sulfides are promising as electrode materials for high-performance supercapacitors. Here, an in-situ hydrothermal method is developed for synthesis of NiS2/MoS2 (NMS) nanowires supported on Ni foam that facilitate the transport of electrolyte ions and electrons. Owing to the structural and compositional benefits, the NiS2/MoS2 electrode exhibits a high areal capacitance of 4.46 F cm−2 at 5 mA cm−2 and excellent cycle stability. In addition, the NiS2/MoS2//AC hybrid supercapacitor was assembled, which delivers an energy density of 0.35 mWh cm−2 at a power density of 3.63 mW cm−2, and 92.4% capacitance retention after 3000 cycles. The work presents a facile in-situ hydrothermal method to synthesize high-performance binder-free electrode.

In Situ Electrochemical Synthesis of Rod-Like Ni-MOFs as Battery-Type Electrode for High Performance Hybrid Supercapacitor

Metal-organic frameworks (MOFs) have become a potential energy storage material due to its high specific surface area, adjustable structure and functionality. Nevertheless, an efficient and controllable method to synthesize MOFs is still highly desired. Herein, we develop a simple and efficient electrochemical synthesis method, in which the Ni2+ ions are provided by nickel foam (NF), and rod-like arrays of Ni-MOFs are obtained in-situ on NF. The obtained products need no additional treatments and can be directly used as a binder-free electrode material. As a result of that, it can significantly improve the rapid transport of electrons and ions near the surface of the electrode. Particularly, the rod-like array Ni-MOFs grown on NF could self-assembled to be flower shaped structural characteristic, which demonstrated high capacity performance (area specific capacity of 5.11 C/cm2 at a current density of 2 mA/cm2) and excellent rate performance. In addition, the as-assembled Ni-MOF-1 h//AC hybrid supercapacitor (HSC) reveals a high energy density of 586.7 mWh/cm2 at a power density of 3679 mW/cm2.

Self-assembled bimetallic cobalt–manganese metal–organic framework as a highly efficient, robust electrode for asymmetric supercapacitors

To obtain highly efficient supercapacitors with extraordinary capacitance, energy density, and cycle life, the design and development of new electrode materials having numerous active sites on the surface are essential. Not only the kind of material but also the surface morphology and microporous structure of the electrode plays an important role in the electrochemical performance of the supercapacitor. In the present work, a bimetallic Co/Mn-metal–organic framework (MOF) has been prepared using a simple hydrothermal method for supercapacitor application. This bimetallic MOF mainly produces a synergistic effect by connecting two kinds of metal ions through an organic ligand. The resulting bimetallic Co/Mn MOF electrode shows a high specific capacitance of 1176.59 F g−1 (2.76 F cm−2) at a current density of 3 mA cm−2 and excellent cycling stability over 5000 cycles. The constructed Co/Mn MOF//AC hybrid supercapacitor exhibits a specific energy of 57.2 Wh kg−1 at a specific power of 2000 W kg−1 and excellent capacity retention of 93.51% over 5000 cycles. These outstanding results are compared with those of similar devices in the literature, thus revealing that our approach is a desirable direction for future research on high-performance energy storage devices as well as hybrid supercapacitors.

Ruddlesden-Popper type La2NiO4+δ oxide coated by Ag nanoparticles as an outstanding anion intercalation cathode for hybrid supercapacitors

Electrode materials play the important role in electrochemical capacitors (ECs). Ruddlesden-Popper type La2NiO4+δ oxides were investigated as an anion intercalation cathode. It has a special crystal structure, which leads to an interesting oxygen transportation. Ag shows significant conductivity, fast rates of oxide ion dissociation and diffusion, a relatively low price, and high oxygen solubility. La2NiO4+δ oxide was synthesized by citrate method, and then was coated by Ag nanoparticles (La2NiO4+δ@Ag) to further improve the cycling stability and capacity. XRD, SEM, TEM and XPS were used to characterize the phase composition, microstructure and surface chemistry. The electrochemical performances in 1 M KOH electrolyte at room temperature were investigated by cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) tests. The capacity at 1 mV s−1 of La2NiO4+δ@Ag is 466.4 C g−1, and the average efficiency at 10 A g−1 approximates to 93% for 10,000 cycles, showing superior performance stability. Oxygen intercalation, migration and extrusion mechanisms of the La2NiO4+δ@Ag are related to oxygen transportation in the perovskite LaNiO3 layers and the rock salt LaO layers. The superior cycling stability and electrode performance can be ascribed to Ruddlesden-Popper structure of La2NiO4+δ, the role of Ag and the effective unitization of redox process. The assembled La2NiO4+δ@Ag//AC hybrid supercapacitor device shows an excellent energy density of 44.7 Wh kg−1 at a power density of 800 W kg−1.

Metal organic frameworks derived hierarchical hollow Ni0.85Se|P composites for high-performance hybrid supercapacitor and efficient hydrogen evolution

Hollow nano-/micromaterials with tunable shell architectures and compositions are becoming increasingly important and attractive for electrochemical energy conversion and storage. Here, we report carbon-incorporated mixed anionic nickel phosphorus-selenium (Ni0.85Se|P) hollow yolk-shell microspheres synthesized by simultaneous selenization and phosphatization of Ni-based metal organic framework (Ni-MOF). Our experimental results indicated that P-doping reduces the synthesis temperature of the system and enhances the crystallinity of Ni0.85Se. As a result, this unique structure (Ni0.85Se|P) with better crystallinity and higher Ni2+/Ni3+ ratio shows outstanding specific capacity of 506 C g−1 at 1 A g−1. And the assembled Ni0.85Se|P//AC hybrid supercapacitor shows high power density of 20.7 Wh kg−1 at energy density of 798.7 W kg−1. Meanwhile, Ni0.85Se|P exhibits smaller Tafel slope of 90 mV dec−1 and lower onset overpotential of 179 mV versus reversible hydrogen electrode (RHE) for hydrogen evolution reaction (HER) than that of NiP2 and Ni0.85Se, which demonstrates the modulated electronic structure of Ni0.85Se|P. Our study will provide a new strategy for combining P-doped induced high crystallinity mixed anion transition metal complexes with MOF of hollow structures for energy storage device and HER.

Construction of Hollow Cobalt–Nickel Phosphate Nanocages through a Controllable Etching Strategy for High Supercapacitor Performances

Bimetal phosphates, especially those with hollow structures, have been recognized as promising materials for energy storage application. However, research on hollow bimetal phosphates is quite rare because of the difficulty in controlling the preparation process. In this work, through a shell-coating and then controllable etching process, a nonspherical hollow bimetal (Co/Ni) phosphate nanocage (named ZIF-67-LDH-CNP-110) is successfully constructed for the first time, to the best of our knowledge. When utilized as an electrode material for supercapacitor application, the as-prepared nanocages exhibit a high specific capacitance of 1616 F g–1 at 1 A g–1 and excellent ratio capability of remaining 80.32% of initial capacitance at a high current density of 10 A g–1. In addition, the as-fabricated ZIF-67-LDH–CNP-110//AC hybrid supercapacitor presents a remarkable energy density of 33.29 Wh kg–1 at a power density of 0.15 kW kg–1.