Co9S8 Hollow Research Articles

CNT/Co3S4@NiCo LDH ternary nanocomposites as battery-type electrode materials for hybrid supercapacitors

Hybrid supercapacitors with high energy density and power density have been greatly required for electronic devices. However, the development of the battery-type electrode materials with high performance is still a challenge. In this study, a ternary carbon nanotube (CNT)/Co3S4 @NiCo layered double hydroxides (NiCo LDH) nanocomposite has been prepared by first synthesis of hollow and core-shell Co3S4 @NiCo LDH nanocubes and then mixing them physically with commercial CNT. The electrochemical studies show that the specific capacity of Co3S4 @NiCo LDH is superior to that of individual Co3S4 or NiCo LDH due to their synergistic effect and CNT can remarkably improve the specific capacity of Co3S4 @NiCo LDH. At the optimum mass ratio of 3:10, the specific capacity of CNT/Co3S4 @NiCo LDH at 1 A g −1 can be up to 744 C g −1 (or 206.7 mAh g−1), about 1.8 times that of Co3S4 @NiCo LDH. In addition, a hybrid supercapacitor using Co3S4 @NiCo LDH or CNT/Co3S4 @NiCo LDH as the positive electrode and active carbon (AC) as the negative electrode was assembled. The performance of Co3S4 @NiCo LDH//AC, CNT/Co3S4 @NiCo LDH//AC and two CNT/Co3S4 @NiCo LDH//AC in series was investigated, displaying good practicability as the energy storage and supply devices. This work provides not only a highly efficient battery-type electrode material but also an easy and effective method to fabricate ternary electrode materials.

Highly efficient activation of peroxymonosulfate by cobalt sulfide hollow nanospheres for fast ciprofloxacin degradation

We reported a facile preparation of CoS2, Co3S4, and Co9S8 hollow nanospheres (HNSs) and their use as peroxymonosulfate (PMS) activators for ciprofloxacin (CIP) degradation. The CIP degradation efficiency follows the order of CoS2 > Co3S4 > Co9S8. The Co2+ is proved to be active site for PMS activation and reactive oxygen species generation. The effect of operating parameters on performance of CoS2 HNSs/PMS system was explored. CoS2 HNSs exhibited highly catalytic activity in a wide pH range of 3 – 10. Complete removal of 10 mg/L CIP was achieved by CoS2 HNSs in 3 min at initial pH of 8.0 with 62.6% CIP mineralization. Three other organic pollutants (rhodamine B, methylene blue and tetracycline) were also degraded to evaluate the universality of the CoS2 HNSs/PMS system. The catalytic performance dropped in the presence of chloride, phosphate, nitrate ions and humic acid. Above 97% CIP removal was achieved even in the sixth run. The degradation pathway of CIP was proposed based on HPLC–MS/MS analysis of CIP intermediates, and two new intermediates, namely, C15H18O4N3F (m/z 323) and C29H31O4N6F (m/z 546), were identified for the first time. Both OH and SO4− were generated and the latter played a key role in CIP degradation.

In-situ MOFs-derived hollow Co9S8 polyhedron welding on the top of MnCo2S4 nanoneedles for high performance hybrid supercapacitors

MOFs-derived hollow Co 9 S 8 polyhedron welding on the top of MnCo 2 S 4 nanoneedles showed a superior energy density of 45.8 W·h·kg −1 at a power density of 800 W·kg −1 . • Waxberry-like MnCo 2 S 4 /Co 9 S 8 hierarchical electrodes are rationally constructed. • This unique structure provides more abundant reaction sites for faradaic reaction. • The MnCo 2 S 4 /Co 9 S 8 electrode exhibits a high specific capacity of 1100.5 F g −1 . • The assembled MnCo 2 S 4 /Co 9 S 8 //AC supercapacitor achieves an excellent electrochemical property. Metal-organic frameworks (MOFs) have been considered as the outstanding templates and precursors in synthesizing advanced cathode materials for supercapacitor. Herein, a novel hierarchical structure with hollow Co 9 S 8 polyhedrons welding on the top of MnCo 2 S 4 nanoneedles are rationally designed via a facile in-situ vulcanization approach. The unique morphology can provide more abundant reaction sites and ensure the efficient electron transport. Due to the synergistic effect between MnCo 2 S 4 and Co 9 S 8 , the hybrid electrode delivers a favorable specific capacity of 1100.5 F·g −1 at a current density of 1 A·g −1 in three-electrode system. Furthermore, an assembled asymmetric supercapacitor comprising MnCo 2 S 4 /Co 9 S 8 and activated carbon delivers a high energy density up to 45.8 W·h·kg −1 at a power density of 800 W·kg −1 . Moreover, the device holds more than 94.8% capacitance retention after 5000 cycles, demonstrating it could be a potential electroactive material for next-generation high performance energy storage device.

Fabrication of ZIF-67 Derived Co3S4-WS2 Heterostructures for All-Solid-State Symmetrical Supercapacitors

Development and modification of the existing material for renewable energy area is gaining its significance however a long way to get commercialization. Transition metal dichalcogenides (TMDs) are gaining interest rapidly in the field of supercapacitors due to their 2D layered morphology, however loses interest for long cyclic stability. Herein we employed hollow Co3S4 microspheres using nitrogen rich ZIF-67 as a precursor. Furthermore, these hollow Co3S4 microspheres are insitu modified by covering with WS2 nanostructures to enhance its energy density. The obtained Co3S4/WS2 composite when employed as an electrode, delivers the specific capacitance of 412.7 F/g at the current density of 1 A/g. Furthermore, the Co3S4/WS2 composite electrodes are used to fabricate an all solid-state symmetrical supercapacitor device, exhibiting a wide potential window of 2 V. The assembled device delivers a very high energy density of 70.7 Wh/kg along with a high-power density of 10.2 kW/kg. The excellent electrochemical performance with 92 % capacity retention proves its potential toward the practical application. The high value of specific capacitance and splendid cycle stability is attributed to the synergy of high surface area ZIF-67 derived Co3S4 microsphere with 2D networked WS2 material.

Lithium-Sulfur Batteries with a Vertical Co9S8 Hollow Nanowall Arrays-Modified Celgard Separator

Advanced energy-storage technologies are urgently needed to satisfy the energy demands of the society. Sulfur is an appealing candidate for high energy-density batteries, owing to its high theoretical capacity (1,675 mA h g-1), natural abundance, and low cost.1-3 However, the rapid capacity degradation, low Coulombic efficiency, and short cycle life originating from polysulfide dissolution and migration remain challenging for the practical application of lithium-sulfur (Li-S) batteries.4, 5 Our previous reports have demonstrated that configuring interlayers between the separator and the sulfur cathode is an effective and convenient strategy to alleviate the shuttle effect.6 However, most of those interlayers are fabricated by vacuum-filtration method, which makes those polar materials easily stack together and thus form a very thick interlayer. Therefore, on the one hand, the transport of lithium ions will be limited by the thick polar interlayers, which is not desirable for fast insertion/de-insertion of Li ions and high rate capacity. On the other hand, the stacked thick interlayers, as an inactive material, will decrease the overall cell energy density. To address such issues, we present here a novel Co9S8 nanowall array with vertical hollow naoarchitecture as an efficient barrier for lithium polysulfides (LiPS) in Li-S batteries.7 We present well-aligned, hollow Co9S8 arrays in-situ grown on a Celgard (Co9S8-Celgard) separator as an efficient polysulfide barrier for high-performance Li-S cells without any significant increase in the weight and volume (Fig. 1a). This novel concept/strategy of designing a multifunctional separator via in-situ grown polar and conductive materials (Co9S8 hollow arrays) on a commercial separator dramatically suppresses the shuttle effect of LiPSs and significantly improves the electrochemical performance of Li-S cells. Due to its well-designed structure, in-situ growth/transformation, and the polarity and high conductivity of Co9S8, the Li-S cell with the Co9S8-Celgard separator not only effectively blocks the LiPSs even with pure sulfur cathodes with a high sulfur loading (5.6 mg cm-2), but also delivers excellent specific capacity, outstanding rate capability, and remarkable cycling stability for an impressive number of 1,000 cycles (Fig. 1b - d). In essence, the novel design and in-situ growth of MOF-derived multifunctional Co9S8 layers are crucial to suppress the severe polysulfide diffusion and alleviate the shuttle effect of LiPSs. We believe that this approach would promote greatly the development of modified separators, particularly the design and synthesis of multifunctional separators. Fig. 1 (a) Schematic illustration of the synthesis process of Co9S8-Celgard. (b) Rate performances at various cycling rates with the Celgard, MOF-Celgard, and Co9S8-Celgard separators. (c) Cycling performances of Li-S cells with high sulfur-loading cathodes with Co9S8-Celgard separators. (d) Long-term cycling performances of the Li-S cells with the Co9S8-Celgard separators at 1C rate for 1,000 cycles. REFERENCES 1 J. He, Y. Chen, W. Lv, K. Wen, C. Xu, W. Zhang, Y. Li, W. Qin, W. He, ACS Nano 2016, 10, 10981. 2 J. He, L. Luo, Y. Chen, A. Manthiram, Adv. Mater. 2017, 29, 1702707. 3 F. Wu, J. T. Lee, N. Nitta, H. Kim, O. Borodin, G. Yushin, Adv. Mater. 2015, 27, 101. 4 G. Zhou, S. Pei, L. Li, D. Wang, S. Wang, K. Huang, L. Yin, F. Li, H. Cheng, Adv. Mater. 2014, 26, 625. 5 J. He, Y. Chen, P. Li, F. Fu, Z. Wang, W. Zhang, J. Mater. Chem. A 2015, 3, 18605. 6 Y. Su, A. Manthiram, Nat. Commun. 2012, 3, 1166. 7 J. He, Y. Chen, A. Manthiram, Energ. Environ. Sci. 2018, 11, 2560. Figure 1

Multifunctional Co9S8 nanotubes for high-performance lithium-sulfur batteries

The commercialization of Lithium–sulfur (LiS) batteries is being hampered by the inherent insulation and volume expansion of sulfur, as well as by shuttle effect of polysulfides. To expand the LiS application, Co9S8@S nanotube composites were developed and fabricated via hydrothermal method combining with incorporating sulfur using melt-diffusion method. In comparison with pure sulfur cathode, the Co9S8@S nanotube composites cathode delivered excellent specific capacity, had remarkable rate performance and superior coulombic efficiency. The initial capacity of Co9S8@S nanotube composites cathode was 937mAh/g and stabled at 650mAh/g after 100cycles at 0.1C, much superior than pure S electrode. The improved electrochemical performance of Co9S8@S nanotube composites cathode was awarded to highly conductive and polar Co9S8 nanotubes. On the one hand, Co9S8 nanotubes help to form effective conductive networks which can improve the transport of electrons/lithium ion and overall electrical conductivity; on the other hand, polar Co9S8 nanotubes entrapped polysulfides through chemical adsorption to alleviate the shuttle effect. In addition, sulfur particles were well-distributed on the hollow Co9S8 nanotubes, which relieve the volume expansion of sulfur effectively. These synergistic effects were achieved by physical constraints and chemical effects of hollow Co9S8 nanotubes.

Carbon nanotube-stabilized Co9S8 dual-shell hollow spheres for high-performance K-ion storage.

In this work, carbon nanotube-coated dual-shell Co9S8 hollow spheres are studied as anode materials for K-ion batteries. The unique hollow structure and carbon nanotubes synergistically enhance the conductivity and resolve the critical drawbacks of Co9S8 electrodes, including large volume variation, structural instability and interfacial changes. Thus, the electrode delivers a stable reversible capacity of 320.5 mA h g-1 at 0.1 A g-1 after 200 cycles with a capacity retention of 91%. At 1.0 A g-1, the capacity is 163.9 mA h g-1 after 1000 cycles with a capacity retention of 73.6%. An investigation of the electrode reaction mechanism indicates that the surface capacity also contributes to the outstanding electrochemical performance.

Co3S4@C@MoS2 microstructures fabricated from MOF template as advanced lithium-ion battery anode

Transition metal chalcogenides as a promising anode material with high theoretical capacity has attracted more and more attention. This thesis focuses on a facile method to synthesize hollow Co3O4 encapsulated by carbon layers (Co3O4@C) with polydopamine as precursor, after reacting with thioacetamide and (NH4)6Mo7O24·4H2O, hollow rhombic dodecahedral shape Co3S4@C@MoS2 heterostructures are successfully fabricated and employed as the anode of lithium-ion battery. Benefiting from the typical layered structure of Co3S4@C@MoS2 heterostructures, the stability and capacity have been significantly improved, with a high capacity of 672.6 mAh g−1 after 200 cycles at the current density of 0.2 A g−1. The excellent electrochemical properties of hollow Co3S4@C@MoS2 heterostructures are ascribed to the consolidate of Co3S4, carbon and MoS2, and the stability of the composite structure.

Hierarchically structured Co9S8@NiCo2O4 nanobrushes for high-performance flexible asymmetric supercapacitors

Hierarchically structured Co9S8@NiCo2O4 nanobrushes constructing by NiCo2O4 nanosheets grown on Co9S8 hollow nanoneedles are first fabricated on carbon cloth substrates via a multi-step route. Remarkably, such Co9S8@NiCo2O4 electrode processes multiplied electrochemical performance as compared to single Co9S8 and NiCo2O4 electrodes. It displays high-performance electrochemical behavior, achieving a specific capacitance of 1966 F g−1 at 1 A g−1 while maintaining excellent stability with about 92.9% capacitance retention after 5000 cycles. The flexible solid-state asymmetric supercapacitor based on this Co9S8@NiCo2O4 electrode exhibits a high specific capacitance of over 250 F g−1 at 1 A g−1, and delivers a high energy density of 86 W h kg−1 at 792 W kg−1 and a maximum specific power of 11360 W kg−1 at 64 W h kg−1. Moreover, the supercapacitor holds more than 84.2% capacitance retention after 10,000 cycles at 10 A g−1 and demonstrates good durability after different deformation, suggesting its outstanding cycle stability and flexibility. Thus, the Co9S8@NiCo2O4 electrode with special heterogeneous structures shows the potential application in wearable energy storage devices.

Boosting Oxygen Reduction Catalysis with N-doped Carbon Coated Co9S8 Microtubes.

Herein, nitrogen-doped carbon coated hollow Co9S8 microtubes (Co9S8@N-C microtubes) are prepared through a facile solvothermal procedure, followed by dopamine polymerization process together with a post-pyrolysis which present excellent electrocatalytic activity for oxygen reduction reaction (ORR). The Co9S8 within the hollow Co9S8@N-C microtubes presents a well-defined single-crystal structure with dominated (022) plane. To obtain desired electrocatalyst, the annealing temperature and the thickness of carbon layer tuned by changing the dopamine concentration are optimized systematically. The electrochemical results demonstrate that the coordination of the N-doped carbon layer, exposed (022) plane, and hollow architecture of Co9S8 microtubes calcined at 700 °C affords outstanding ORR performance to Co9S8@N-C microtubes. The moderate thickness of the carbon layer is crucial for improving ORR activity of Co9S8@N-C microtubes, while increasing or decreasing the thickness would result in activity decrease. More importantly, the N-doped carbon layer can protect inner Co9S8 from undergoing aggregation and dissolution effectively during the ORR, resulting in excellent electrocatalytic stability.

Interlaced Ni-Co LDH nanosheets wrapped Co9S8 nanotube with hierarchical structure toward high performance supercapacitors

High electrochemical performance of supercapacitor electrodes largely rely on the smart design of nanoarchitectures with scrupulous combination of different active materials. We present a facile method for the multicomponent design of hierarchical Co9S8 hollow nanotubes (CS NTs) wrapped with Ni-Co layered double hydroxides nanosheets (Ni-Co LDH NSs) core-shell high-performance supercapacitors. The CS NTs serve as an ideal backbone with pentagonal cross-section to enhance the conductivity for acting as a “superhighway” for electron transport, whereas the Ni-Co LDH NSs with high electrochemical activity electrodeposited on the surface of CS NTs provide the electroactive sites and enhance the structural stability for faradaic reaction. The CS NTs@Ni-Co LDH NSs hierarchical electrode presents a high specific capacitance of 1020 C g−1 and high cycling stability of 90.4% after 10,000 cycles. Moreover, an asymmetric supercapacitor (ASC) was assembled with CS NTs@Ni-Co LDH NSs as the anode and active carbon as cathode. The as-fabricated ASC shows high energy density of 50 Wh kg−1 and exhibit superior cyclic stability of 86.4% retention over 5000 cycles, suggesting this electrode is promising for efficient electrochemical capacitors.

MOF-driven ultra-small hollow Co9S8 nanoparticles embedded in porous carbon for lithium-ion batteries

Abstract

Facile synthesis of nickel-doped Co9S8 hollow nanoparticles with large surface-controlled pseudocapacitive and fast sodium storage

Transition metal sulfides are considered to be promising candidates as anodes for sodium ion batteries (SIBs). However, their further applications are limited by poor electrical conductivity and sluggish electrochemical kinetics. We report, for the first time, nickel-doped Co9S8 hollow nanoparticles as SIB anodes with enhanced electrical conductivity and a large pseudocapacitive effect, leading to fast kinetics. This compound exhibits excellent sodium storage performance, including a high capacity of 556.7 mA h g−1, a high rate capability of 2000 mA g−1 and an excellent stability up to 200 cycles. The results demonstrate that nickel-doped Co9S8 hollow nanoparticles are a promising anode material for SIBs.

ZIF-67 derived hollow cobalt sulfide as superior adsorbent for effective adsorption removal of ciprofloxacin antibiotics

The hollow nanostructures receive increasing attention in recent years. In particular, the confined cavity in the hollow nanostructures can function as a carrier for loading target molecules, whereas the porous walls are beneficial for shortening the transport distance of target molecules from solution to surface of adsorbent, making it possible to achieve high adsorption capacity with short adsorption time. Here, the hollow Co3S4 was synthesized by using ZIF-67 as template and thioacetamide as sulfide reagent through a simple solvothermal method, and characterized by SEM, TEM, HRTEM, XRD, FT-IR, zeta potential measurement, TG, N2 adsorption-desorption and XPS analysis. The adsorption performance of hollow Co3S4 for ciprofloxacin (CIP) antibiotics was evaluated in neutral aqueous solution. The equilibrium adsorption data were well fitted by Langmuir model, and a high maximum CIP adsorption capacity of 471.7 mg g−1 was obtained. The relatively high correlation coefficient of Tempkin model (r2 = 0.960) indicated a stronger electrostatic interaction between CIP and hollow Co3S4, which was consistent with the observation from the effects of pH and ionic strength. Result of adsorption kinetic investigation indicated fast CIP adsorption by hollow Co3S4. The adsorption kinetics follows the pseudo-second-order kinetic model and liquid-film diffusion model. CIP adsorption by hollow Co3S4 was hardly affected by humic acid. Further, the hollow Co3S4 exhibited no obvious loss in CIP removal after recycling for five times. The result displays an important environmental significance of hollow Co3S4 for CIP sequestration, in particular in wastewater, where CIP antibiotics are only slightly transformed or even unchanged.

Elaborately assembled core-shell structured metal sulfides as a bifunctional catalyst for highly efficient electrochemical overall water splitting

Low efficiency, short lifetimes, and limited kinds of catalysts are still three fundamental shortcomings that have plagued electrochemical water splitting. Herein, we rationally synthesized a cost-effective Co3S4@MoS2 hetero-structured catalyst that has proven to be a highly active and stable bifunctional catalyst for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in an alkaline environment. The heterostructure was obtained via a first hydrothermal approach to obtain hollow Co3S4 nanoboxes based on the ionic exchange reaction between Fe(CN)63− of Co-Fe Prussian blue analogue (PBA) and S2− at 120 °C, and the subsequent in situ growth of MoS2 nanosheets on the surface of Co3S4 nanoboxes at an elevated temperature of 200 °C. The synergistic effects between the active and stable HER catalyst of MoS2 and the efficient OER catalyst of Co3S4, as well as the morphological superiority of hollow and core-shell structures, endow Co3S4@MoS2 with remarkable electrocatalytic performance and robust durability toward overall water splitting. As a result, the designed non-noble electrocatalyst of Co3S4@MoS2 exhibits a low overpotential of 280 mV for OER and 136 mV for HER at a current density of 10 mA cm−2 in an alkaline solution. Meanwhile, a low cell voltage of 1.58 V is achieved by using the heterostructure as both anode and cathode catalysts. This work paves the way to the design and construction of other prominent electrocatalysts for overall water splitting.

Hollow Co9S8 from metal organic framework supported on rGO as electrode material for highly stable supercapacitors

Metal sulfides as a feasible candidate with high specific capacitance for supercapacitors suffer from sluggish ion/electron transport kinetics and rapid capacitance fading. Herein, we demonstrate a method to fabricate a composite of reduced graphene oxide (rGO) with hollow Co9S8 derived from metal organic framework (MOF). Due to the combined highly conductive rGO substrates and hollow shell, the prepared rGO/Co9S8 composite exhibits a high specific capacitance of 575.9F/g at 2A/g and 92.0% capacitance retention after 9000 cycles. Its excellent electrochemical performance provides great promise for application, and this versatile method can be extended to prepare other similar nanocomposite.

MOF-Derived Hollow Co3S4 Quasi-polyhedron/MWCNT Nanocomposites as Electrodes for Advanced Lithium Ion Batteries and Supercapacitors

Transition metal sulfides/carbon nanocomposites are being extensively studied as electrode materials since a rationally designed structure incorporated with carbonaceous materials can eliminate pulverization caused by volume expansion during the cycling process and promote electron transport in the electrodes. Herein, we report a cobalt sulfide/multiwalled carbon nanotube (MWCNT) nanocomposite with a novel structure where MWCNTs penetrate through hollow Co3S4 quasi-polyhedra and form conductive networks. The preparation of this unique structure involves sulfurization of ZIF-67/MWCNT precursors via solvothermal process and subsequent crystallization by thermal annealing. With the employment of TEM 3D reconstruction technology, a panoramic view of the as-prepared nanocomposites is demonstrated and the structure is thoroughly confirmed. Moreover, the hollow Co3S4/MWCNT nanocomposites exhibit high specific capacity and excellent cyclic stability as electrodes for both lithium ion batteries and supercapacitors...

Facile Synthesis of Co9S8 Hollow Spheres as a High-Performance Electrocatalyst for the Oxygen Evolution Reaction

Cobalt pentlandite (Co9S8) has recently attracted great attention as a highly efficient and stable earth-abundant catalyst for the oxygen evolution reaction (OER) because of its electronic properties and intrinsic structure. However, the rational design and synthesis of OER catalysts to further enhance the electrochemical activity and durability remain major challenges. Herein, novel Co9S8 hollow spheres were successfully obtained through a template- and surfactant-free method, and they exhibit impressive electrocatalytic properties for the OER. Notably, the as-prepared material has superior OER performance with a low overpotential of 285 mV reached at 10 mA cm–2, a Tafel slope of 58 mV decade–1, and improved stability in 1 M aqueous solution KOH. Impressively, the unique hollow structure of Co9S8 hollow spheres imparts large surface area and abundant active sites, resulting in the superior catalytic activity. Thus, this work provides promising alternative cobalt sulfide-based oxygen evolution electrocata...

Facile and Controllable One‐Pot Synthesis of Hierarchical Co9S8 Hollow Microspheres as High‐Performance Electroactive Materials for Energy Storage and Conversion

AbstractHierarchical Co9S8 hollow microspheres with nanosheet building units are synthesized via a one‐step hydrothermal method. The presence of glucose in the synthesis is essential to the formation of the hollow structure and influences the size and morphology of the microspheres. Benefiting from the advantages of a hollow architecture, a conductive carbon coating and Co9S8 nanosheet units, the composite exhibits outstanding electrochemical properties. When the composite electrode is evaluated as the cathode material for supercapacitors, it exhibits a high specific capacitance of 514 F g−1 at 1.0 A g−1 and a capacitance retention of circa 88 % over 1000 cycles at 8 A g−1. On the other hand, the nanosheet‐constructed hollow structure can efficiently promote the electrocatalytic activity of Co9S8 toward the oxygen evolution reaction. Due to the fact that Co9S8 nanosheets impart largely exposed active sites, the composite exhibits a low Tafel slope of 66 mV dec−1 and no obvious degradation after 12 h water oxidation.

Self-Templated Formation of Interlaced Carbon Nanotubes Threaded Hollow Co3S4 Nanoboxes for High-Rate and Heat-Resistant Lithium-Sulfur Batteries.

Lithium-sulfur batteries (Li-S) have attracted soaring attention due to the particularly high energy density for advanced energy storage system. However, the practical application of Li-S batteries still faces multiple challenges, including the shuttle effect of intermediate polysulfides, the low conductivity of sulfur and the large volume variation of sulfur cathode. To overcome these issues, here we reported a self-templated approach to prepare interconnected carbon nanotubes inserted/wired hollow Co3S4 nanoboxes (CNTs/Co3S4-NBs) as an efficient sulfur host material. Originating from the combination of three-dimensional CNT conductive network and polar Co3S4-NBs, the obtained hybrid nanocomposite of CNTs/Co3S4-NBs can offer ultrahigh charge transfer properties, and efficiently restrain polysulfides in hollow Co3S4-NBs via the synergistic effect of structural confinement and chemical bonding. Benefiting from the above advantages, the S@CNTs/Co3S4-NBs cathode shows a significantly improved electrochemical performance in terms of high reversible capacity, good rate performance, and long-term cyclability. More remarkably, even at an elevated temperature (50 °C), it still exhibits high capacity retention and good rate capacity.