NiCo-layered Double Hydroxide Research Articles

MXene nanomesh for high-performance supercapacitor

The merits of excellent electrical conductivity, good hydrophilicity, and large specific capacitances render MXene film electrodes attractive in supercapacitors (SCs). However, the tortuous ion transfer in restacked nanosheets limits the electrochemical performance of dense film electrodes. To solve the ion transfer issue, we propose a strategy to produce porous films assembled by Ti3C2 nanomesh via the chemical oxidation-etching process. The rich in-plane pores in Ti3C2 nanomesh provide abundant pathways and new active sites for ion transfer/adsorption, greatly improving the electrochemical activity. Specifically, the obtained Ti3C2 nanomesh films exhibit high specific capacitances of 235 F g-1 at 1 A g-1 and 184 F g-1 at 10 A g-1 in 6 M KOH, which are ∼2 times higher than the pristine Ti3C2 films (118 F g-1 at 1 A g-1 and 90 F g-1 at 10 A g-1). Furthermore, hybrid capacitors, composed of the Ti3C2 nanomesh films as the negative electrodes and Ni-Co layered double hydroxides as the positive electrodes, in KOH electrolytes, are also demonstrated to show practicability. This work provides an opportunity to develop high-performance energy storage devices with the 2D nanomesh.

Dual-modal flexible zinc-air battery-driven self-powered and impedimetric aptasensor based on the hybrid of V2CTx MXene and bimetallic layered double hydroxide for the detection of cortisol

Based on the heterojunction of V2CTx MXene and bimetallic CoNi-layered double hydroxide (CoNi-MLDH), a novel dual-modal electrochemical aptasensor (denoted as CoNi-MLDH@V2CTx) was developed for the noninvasive point-of-care detection of cortisol in different body fluids (such as sweat, urine, and blood). Herein, V2CTx nanosheets (NSs) were used as scaffolds for the in-situ growth of cobalt/nickel zeolitic imidazolate framework (CoNi-ZIF) polyhedrons, which was then converted to CoNi-MLDH NSs through an in situ etching–coprecipitating process. Benefiting from the merits of V2CTx NSs (excellent electrochemical activity) and CoNi-ZIF (large specific surface and pore size, rich functionality, excellent oxygen reduction, and strong bioaffinity toward aptamer), and from the synergistic effect, the CoNi-LDH@V2CTx junction showed great potential as a platform for the constructing the electrochemical aptasensor for detecting cortisol. Within a wide cortisol range 10 fg mL−1 to 100 ng mL−1, the dual-modal impedimetric and zinc-air battery-driven self-powered aptasensor based on CoNi-MLDH@V2CTx illustrated the ultralow detection limit of cortisol, 0.26 and 0.17 fg mL−1, respectively. They demonstrated high selectivity, superior stability, excellent reproducibility, and promising regeneration ability, and showed potential applications for cortisol analysis in different environments (sweat, urine, and blood). The present work provides a promising option for maintaining people’s mental health through the sensitive and selective detection of cortisol in human fluids.

Preparation and electrochemical properties of NiCo-layered double hydroxide supercapacitor

Layered double hydroxides (LDHs) are favorable pseudocapacitance electrodes due to their adjustable composition and low cost. Here, a series of NiCo-LDHs were prepared by a novel ammonia diffusion method at room temperature. Compared with other synthesis methods, this method is a simple, green, original and effective method. The morphology, structure, and elemental composition of NiCo-LDH electrode materials were characterized and their electrochemical properties were tested. The optimal honeycomb NiCo-LDH shows a specific capacitance (Cs) of 1463.2F·g−1 at 1 A·g−1, and the rate capacity is 75.2 % at 20 A·g−1. Particularly, the Cs is still 87.9 % after 2000 charge–discharge cycles at a high current density of 20 A·g−1. In addition, the hybrid supercapacitor with NiCo-LDH//activated carbon (AC) could show an energy density of 23.4 Wh·kg−1 at a power density of 900 W·kg−1, along with 73.4 % capacity retention after 5000 cycles.

Tandem Nitrate Electroreduction to Ammonia with Industrial-Level Current Density on Hierarchical Cu Nanowires Shelled with NiCo-Layered Double Hydroxide

Tandem Nitrate Electroreduction to Ammonia with Industrial-Level Current Density on Hierarchical Cu Nanowires Shelled with NiCo-Layered Double Hydroxide

Enhanced interfacial charge transfer by oxygen vacancies in ZnCdS/NiCo-LDH heterojunction for efficient H2 evolution

The elaborate modulation of charge transfer in Z-scheme heterojunctions is of significant importance yet poses a formidable challenge for achieving efficient photocatalytic hydrogen production. The present study reports the fabrication of ZnCdS nanoparticle wrapped by NiCo-layered double hydroxide with enriched oxygen vacancies (ZCS@LDH-Ov) was fabricated, which exhibits enhanced interfacial binding and internal electric field (IEF) in comparison to ZCS@LDH. Under visible-light irradiation, the as-prepared ZCS@LDH-Ov exhibits a superior photocatalytic H2 production rate of up to 2.68 mmol·g−1·h−1, which is approximately 9.24-fold and 2.68-fold of the pristine ZnCdS and ZCS@LDH, respectively. The stability of the photocatalyst after 5 cycles is obviously enhanced, with ZCS@LDH exhibiting a remaining hydrogen evolution reaction (HER) rate of 52.7 % and ZCS@LDH-Ov demonstrating an impressive remaining rate of 98.2 %. The Z-scheme facilitates rapid charge transfer and efficient separation, thereby enhancing the catalytic activity for HER. The excellent recyclability of ZCS@LDH-Ov is primarily attributed to enhanced photo-corrosion resistance of ZnCdS, which can be ascribed to the efficient transfer of photo-generated holes through a rapid interfacial charge pathway.

NiCo-layered double hydroxide modified TiO2 nanotube arrays and its application in photoelectrochemical cathodic protection of 304 stainless steel

NiCo-layered double hydroxide (NiCo-LDH) modified TiO2 (NiCo/TiO2) were prepared by a simple electrochemical deposition method. The morphology, chemical composition, light adsorption and photoelectrochemical (PEC) properties of these composites were fully characterized. The performance of NiCo/TiO2 in PEC cathodic protection of 304 stainless steel (304 SS) was investigated in NaCl solution. The results showed that NiCo(−0.8)/TiO2 had the best PEC cathodic protection performance, as indicated by the largest photo-induced potential drop (−440 mV) of 304 SS. It was proposed that a type II heterojunction was built between NiCo-LDH and TiO2, leading to a more efficient separation of photo-generated charge carriers.

Metal organic framework derived NiCo layered double hydroxide anode aggregated with biomass derived reduced graphene oxide cathode: A hybrid device configuration for supercapattery applications

Metal-organic frameworks (MOFs), due to its exceptional characteristics like high specific surface area and design diversity, serve as an outstanding sacrificial template in forming layered double hydroxides (LDHs) for highly efficient electrodes in supercapattery devices. In this work, we have prepared bimetallic layered Nickel Cobalt LDH via in-situ etching of Co-ZIF, in different Nickel concentrations directly on Ni foam that enhances the interfacial contact between substrate and the material. The optimised NiCo LDH-2 sample exhibited remarkable electrochemical behaviour with fast electrolyte ion diffusion kinetics ideal for supercapattery device and delivered a high specific capacitance of 2567 Fg−1 at 1 Ag−1. Further, the supercapattery device assembled with Ni-Co LDH as anode and rGO derived from a sustainable source as cathode demonstrated an energy density of 21 Whkg−1, power density of 0.307 kWkg−1 and good cyclic stability with capacitance retention of 88.89 % along with coulombic efficiency of 90.58 % over 1500 cycles. This work proposes an effective approach for designing layered NiCo-LDH that can be further extended to the synthesis of other transition metal-derived LDH for supercapattery devices.

Regulating the Oxygen Vacancy and Electronic Structure of NiCo Layered Double Hydroxides by Molybdenum Doping for High-Power Hybrid Supercapacitors.

Amelioration of nickel-cobalt layered double hydroxides (NiCo-LDH) with a high specific theoretical capacitance is of great desire for high-power supercapacitors. Herein, a molybdenum (Mo) doping strategy is proposed to improve the charge-storage performance of NiCo-LDH nanosheets growing on carbon cloth (CC) via a rapid microwave process. The regulation of the electronic structure and oxygen vacancy of the LDH is consolidated by the density functional theory (DFT) calculation, which demonstrates that Mo doping narrows the band gap, reduces the formation energy of hydroxyl vacancies, and promotes ionic and charge transfer as well as electrolyte adsorption on the electrode surface. The optimal Mo-doped NiCo-LDH electrode (MoNiCo-LDH-0.05/CC) has an amazing specific capacity of 471.1mA h g-1 at 1 A g-1 , and excellent capacity retention of 84.8% at 32 A g-1 , far superior to NiCo-LDH/CC (258.3mA h g-1 and 76.4%). The constructed hybrid supercapacitor delivers an energy density of 103.3W h kg-1 at a power density of 750W kg-1 and retains the cycle retention of 85.2% after 5000 cycles. Two assembled devices in series can drive thirty LED lamps, revealing a potential application prospect of the rationally synthesized MoNiCo-LDH/CC as an energy-storage electrode material.

In situ tellurization strategy for crafting nickel ditelluride/cobalt ditelluride hierarchical nanostructures: A leap forward in hybrid supercapacitor electrode materials

Advancements in renewable energy conversion can be significantly propelled by optimizing the performance of transition-metal-based electrodes. In this study, we introduce an innovative, in situ tellurization strategy to synthesize novel, flower-like hierarchical structures of nickel ditelluride/cobalt ditelluride (NiTe2/CoTe2) on a nickel foam substrate (labeled as NF/FNCT), making them promising candidates for electrodes in hybrid supercapacitors. Initially, we utilized a hydrothermal method to create flower-like NiCo-layered double hydroxide (NiCo-LDH) nanoarrays on nickel foam (NF/FNCLDH). This process was followed by the tellurization of these nanoarrays, which yields the NiTe₂/CoTe₂ nanostructures. The strategic assembly of active materials on a conductive substrate effectively obviates the need for inert, slow-conductive binders, thereby facilitating redox chemistry. Capitalizing on the synergistic effects of the conductive tellurium and hierarchical flower-like nanomorphology, the NF/FNCT showcases expedited electron/ion transport, enhanced efficiency, and exceptional electrochemical performance. The NF/FNCT electrode discloses an impressive capacity of 1388.9 (±3) C/g, superior rate capability (83.45 % capacity retention at 30 A/g), and remarkable cycling durability of 96.67 %. Furthermore, when integrated with activated carbon (AC), the resultant hybrid supercapacitor delivers a desirable energy density of 58.85 Wh kg−1 at a power density of 806.85 W kg−1, demonstrating commendable rate capability and cycling durability. This investigation opens new avenues for the synthesis of materials for hybrid supercapacitors.

Two-in-one strategy for the construction of folded boron-doped NiCo-layered double hydroxides for electrochemical energy storage

The layered double hydroxides (LDHs) with redox metal centers and tailorable layered structures have been regarded as the favorable electrode materials for supercapacitors. In this work, a two-in-one strategy has been designed to synthesis two-dimensional (2D) boron-doped NiCo-LDH with abundant wrinkles by reacting NiCo-zeolite imidazolate frameworks with KBH4 in only 30 min. The abundant wrinkles can afford rich active sites for redox reaction and the 2D structure can shorten the ion transport path. The theoretical calculation confirms that mixed NiCo composition and B doping can enhance the OH− adsorption and regulate the electronic properties. Because of the synergistic effect of Ni and B occurred in the B-NiCo-LDH, the resulting B doped NiCo-LDH/nickel foam electrode can achieve good performance of 1351 F g−1 at 1 A g−1 and maintains 802 F g−1 at 20 A g−1. This study may provide a facile and efficient protocol for construction of B doped LDH based supercapacitor electrodes.

A hierarchical heterostructure NiCo-layered double hydroxide nanosheets/CoP nanowires/Ni foam for high-efficiency oxygen evolution reaction

Developing a hierarchical heterostructure is a feasible strategy to explore high-efficiency electrocatalysts for oxygen evolution reaction (OER). In this work, a hierarchical heterostructure was built by interface engineering between NiCo-LDH nanosheets and CoP nanowires. Their electronic structure is affected each other by a strong interaction due to the formed hierarchical heterostructure, regulating the intrinsic activity. CoP with a thin and long nanowire structure provides a large electrochemical active area. With these advantages, the prepared NiCo-LDH nanosheets/CoP nanowires/Ni foam shows an enhanced oxygen evolution reaction (OER) performance with an overpotential of 253 mV at 10 mA·cm−2 in an alkaline environment (1 M KOH). This paper provides a potential strategy for high-efficiency oxygen evolution reaction (OER).

The excellent microwave absorption properties of the composite structure of 3D flower-like layered double hydroxide derivatives and multi-walled carbon nanotubes

The control of electromagnetic pollution and military affairs both heavily rely on the absorption and attenuation of electromagnetic waves. NiO/Co3O4 obtained by pyrolysis of NiCo-layered double hydroxides retained the structural framework of the precursor and introduced a porous structure in the pyrolysis process, which effectively enhanced the multiple reflections and scattering of electromagnetic waves. Furtherly, multi-walled carbon nanotubes were embedded into bimetallic oxides to create a conductive network and introduce polarization groups, resulting in a reflection loss of −56.90 dB and an absorption bandwidth of 6.19 GHz. Compared to traditional metal oxides, the NiO/Co3O4-MWCNT composite greatly improved the wave absorption effect. Such a new structure provided a new idea for the application of LDH in the field of wave absorption.

NiCo-layered double hydroxides /Co9S8 with heterogeneous structure as ultra-high performance electrocatalyst for oxygen evolution reaction

Heterogeneous interface engineering is an ideal method for designing low-cost and efficient electrocatalysts for oxygen evolution reaction (OER). NiCo-layered double hydroxide (LDH)/Co9S8 with heterogeneous structure was prepared by a two-step hydrothermal method and employed for OER. The layered structure with a spherical base exhibited the lower overpotential (151 mV) and Tafel slope (100 mV dec−1) at a current density of 10 mA cm−2, which surpass commercially available IrO2 and most reported non-precious metal electrocatalysts. The synergistic effect at the interface can increase the conductivity of the material, induce electron migration between NiCo-LDH and Co9S8, and decrease the energy barrier of the OER intermediate, thereby increasing the electrocatalytic activity. At the same time, heterostructures with rough surfaces and ultra-hydrophilic properties can provide the desired stability, promote ion penetration and the release of bubbles, improve the accessibility of the active site, and thus enhance the catalytic performance of OER. This work provides a feasible way to develop high performance OER electrocatalysts.

(Invited) towards Continuous Health Monitoring Platforms By Enzyme-Free Electrochemical Sensors and Triboelectric Sensors for Noninvasive Lactate Detection

Emerging wearable devices with non-invasively biosensing technics have drawn considerable attention to continuously monitor several metabolites in body fluids, such as a tear, saliva, and sweat, to diagnose human health conditions. Most importantly, wearable sensors could offer unique possibilities for online, real-time and non-invasive monitoring of health compared to traditional invasive biosensors. Among lots of analytes, lactic acid concentration in the human body exhibits a high relationship with several diseases such as acute heart diseases, hypoxia, muscle fatigue, meningitis, and cystic fibrosis, and it could also cause muscle pain in athletes. To further boost up the reproducibility and reliability of wearable biosensors to detect lactate concentration levels from human sweat, Ni-based layered double hydroxide (LDH) with various secondary transition metals (Fe and Co) was proposed as electrocatalysts in an enzyme-free electrochemical lactate sensor. According to the mechanism of lactate oxidation on the transition metal-based electrocatalyst, secondary transition metal of Co could serve as the active site for lactate oxidation and facilitate the adsorption of OH- in the alkaline electrolyte. To further increasing the active surface area for enhancing the sensitivity of Ni-based LDH, ZIF-67 derived NiCo LDH was synthesized as the electrocatalyst for non-enzymatic lactate detection. Co-based ZIF-67 served as self-sacrificial templates to fabricate hierarchically structural NiCo LDH with uniform porosity and high electrochemically active surface area to achieve outstanding electrocatalytic performance for lactate sensing. After optimizing the particle size of ZIF-67 and transformation times, ZIF-67 derived NiCo LDH reached the ultrahigh sensitivity of 83.98 μA mM- 1 cm- 2 at an applied potential of 0.55 V (vs. Ag/AgCl KCl sat’d) in the concentration range from 2 to 26 mM. On the other hand, pioneering works in biosensors for lactate detection in sweat has been encountered major challenges such as noble material usage, immobile power supply, and complicated circuit connection to realize the compact sustainable sensing systems. To solve these restrictions, herein, the self-powered molecular imprinted polymers based triboelectric sensor (MIP-TES) was designed to offer a multifunctional noninvasive approach for specific and simultaneous lactate detection. Free-standing PVDF/graphene flexible electrode modified poly(3-aminophenyl boronic acid) imprinted lactate molecule demonstrated the change of the surface properties afterlactate adsorption. MIP-modified electrode revealed the selective lactate sensing over non molecular imprinted polymers (NIP) electrode through the superior and stable signal change with variation of lactate concentration in human sweat. Moreover, MIP modified lactate sensor was further introduced in the triboelectric nanogenerator system to harvest mechanical energy from contact and separation into electrical output. The more adsorbed lactate led to lower energy barriers and decreasing electrical potential when detecting higher lactate concentration. Self-power triboelectric lactate sensor could directly power the number of LED lights without an external energy supply. Eventually, it was validated the feasible application of wearable sensors on human skin. After introducing noninvasive enzyme-free biosensors and triboelectric sensors, an innovatively continuous non-invasive health monitoring platforms can be achieved for practical applications, especially in the areas of home medical examination and wearable personal biosensors.

Electrochemically Finely Regulated NiCo‐LDH/NiCoOOH Nanostructured Films for Supercapacitors with Record High Mass Loading, Areal Capacity, and Energy Density

AbstractThe design of supercapacitor materials with both high mass loading and high areal capacity is a major strategy to overcome relatively low energy density of supercapacitors. Herein, NiCo‐layered double hydroxide (NiCo‐LDH)/NiCoOOH composite films with both ultrahigh mass loading and high areal capacity are prepared by a two‐step cyclic voltammetry method. The films consist of NiCo‐LDH/NiCoOOH microspheres assembled with ultrafine nanosheets with highly ordered pore distribution from macropores to micropores and abundant defect active sites, which are conducive to the transport of electrolyte ions, increasing the reaction kinetics, and greatly improving the utilization of active material. The optimal film with hierarchical microstructure featuring an ultrahigh mass loading of 80 mg cm−2 not only exhibits a state‐of‐the‐art high areal capacity of 14.7 mAh cm−2, but also shows a record‐high energy density of 10.7 mWh cm−2 , as well as presents remarkable mechanical stabilityand superior capacity retention of 99% after 20000 galvanostatic charge‐discharge cycles. Moreover, by combining the experimental analysis and theoretical calculations, the mechanism of preferential conversion of the NiCo‐LDH in the subtle defect region to NiCoOOH by electrochemistry and the synergistic effect in electrochemical energy storage of the NiCo‐LDH and NiCoOOH phases is proposed.

NiCo2 O4 /Hollow Mesoporous Carbon Nanosphere Hybrids Enabling Super-Hydrophobicity, Thermal Insulation, and Highly Efficient Microwave Absorption.

The combination of 2D magnetic nanosheets and mesoporous carbon with unique interfaces shows considerable prospects for microwave absorption (MA). However, traditional assembly procedures make it impossible to accurately manage the assembly of magnetic nanosheets in carbon matrices. Herein, a reverse strategy for preparing complex magnetic nanosheet cores inside carbon-based yolk-shell structures is developed. This innovative approach focuses on controlling the initial crystallite formation sites in a hydrothermal reaction as well as the inflow and in situ growth behavior of 2D NiCo-layered double hydroxide precursors based on the capillary force induced by hollow mesoporous carbon nanospheres. Accordingly, the as-prepared YS-CNC-2 absorber exhibits remarkable MA performances, with an optimal reflection loss as low as -60.30dB at 2.5mm and an effective absorption bandwidth of 5.20GHz at 2.0mm. The loss of electromagnetic waves (EMW) depends on natural resonance loss, dipole polarization relaxation, and multiple scattering behavior. Ontopof that, the functionalized super-hydrophobic MA coating is produced in spraying and curing processes utilizing YS-CNC-2 nanoparticles and fumed silica additives in the polydimethylsiloxane matrix. The excellent thermal insulation, self-cleaning capability, and durability in diverse solutions of the coating promise potential applications for military equipment in moist situations.

A heterostructure NiCo-layered double hydroxide nanosheets/Co3O4 Nanowires/Ni foam for the enhanced oxygen evolution reaction

A heterostructure NiCo-layered double hydroxide nanosheets/Co3O4 Nanowires/Ni foam for the enhanced oxygen evolution reaction

Controlled Synthesis of Flower-like Hierarchical NiCo-Layered Double Hydroxide Integrated with Metal-Organic Framework-Derived Co@C for Supercapacitors.

Layered double hydroxides (LDHs) have come to the foreground recently, considering their unique layered structure and short ion channels when they act as electrode materials for supercapacitors (SCs). However, due to their poor rate and cycle performance, they are not highly sought after in the market. Therefore, a flower-like hierarchical NiCo-LDH@C nanostructure with flake NiCo-LDH anchored on the carbon skeleton has emerged here, which is constructed by calcination and hydrothermal reaction and applying flake ZIF-67 as a precursor. In this structure, NiCo-LDH grows outward with abundant and homogeneously distributed Co nanoparticles on Co@C as nucleation sites, forming a hierarchical structure that is combined tightly with the carbon skeleton. The flower-like hierarchical nanostructures formed by the composite of metal-organic frameworks (MOFs) and LDHs have successfully enhanced the cycle and rate performance of LDH materials on the strength of strong structural stability, large specific surface area, and unique cooperative effect. The NiCo-LDH@C electrode displays superb electrochemical performance, with a specific capacitance of 2210.6 F g-1 at 1 A g-1 and 88.8% capacitance retention at 10 A g-1. Furthermore, the asymmetric supercapacitor (ASC) constructed with NiCo-LDH@C//RGO reveals a remarkable energy density of 45.02 W h kg-1 with a power density of 799.96 W kg-1. This project aims to propose a novel avenue to exploit NiCo-LDH electrode materials and provide theory and methodological guidance for deriving complex structures from MOF derivatives.

Dual-mode electrochemical/colorimetric microfluidic sensor integrated tetrahedral DNA nanostructures with Au/Ni-Co LDH NCs nanozyme for ultrasensitive detection of aflatoxin B1

Aflatoxin B1 (AFB1) is one of the most hazardous mycotoxins and lead to a deadly danger to animal and human health. The development of portable, low-cost, and easy to operate analytical tools is essential for AFB1 detection, especially in resource-limited regions. Herein, a dual-mode microfluidic paper-based analytical device (μPAD) with electrochemical and colorimetric readout was constructed for AFB1 detection using Au NPs anchored Ni-Co layered double hydroxides nanocages (Au/Ni-Co LDH NCs) as a signal amplifier. In this design, tetrahedral DNA nanostructures (TDNs) were employed as a scaffold to anchor “bottom-up” aptamers (Apt) for improving capture efficiency of AFB1. Au/Ni-Co LDH NCs with excellent peroxidase (POD)-like activity were bound on the TDNs through hybridization of Apt and complementary DNA (cDNA), a significant electrochemical signal of H2O2 reduction was generated. Meanwhile, the·OH from H2O2 decomposition catalyzed the oxidation of 3,3′,5,5′-tetramethylbenzidine and resulted in a colorimetric signal. The binding of target AFB1 to Apt triggered the dissociation of Apt/cDNA, causing the release of the signal amplifier from the sensing interface and signal decrease. Consequently, a detection range of 0.2 pg/mL-100 ng/mL for electrochemical and 50 pg/mL-100 ng/mL for colorimetric were achieved for AFB1, holding promising application in the fields of food safety.

A novel approach to electromagnetic wave absorbing material design: Utilizing nano-antenna arrays for efficient electromagnetic wave capture

This paper proposes a new and unprecedented strategy for designing efficient and ultra-light electromagnetic wave (EMW) absorbing materials. The strategy utilizes a nano-antenna arrays structure to capture EMW. Specifically, CoNi-layered double hydroxide (CoNi-LDH) nanoneedles are designed on the surface of carbon fiber cloth (CFC) using a solvothermal method, whereafter an in situ chemical oxidative polymerization process is employed to construct polyaniline (PANI) coating on these CoNi-LDH nanoneedles. The resultant composite, named PANI@CoNi-LDH@CFC, possesses the unique shell-core PANI@CoNi-LDH nano-antenna arrays and thus exhibits enhanced EMW absorption performance. The PANI@CoNi-LDH@CFC composite obtains an effective absorption bandwidth of 14.8 GHz (1.0–5.0 mm) and a minimum reflection loss of −57.6 dB. In particular, computer simulation technology confirms that the radar cross section values of PANI@CoNi-LDH@CFC are lower than −16.4 dBm2 in the range of −60°<θ < 60°, indicating a high radar wave attenuation ability. This work pioneers the research on design of nano-antenna arrays structure to strengthen EMW capture and opens up a unique path for constructing high-performance EMW absorbing materials.