The intercalation of potassium ions into graphite is demonstrated to be feasible, while the electrochemical performance potassium-ion batteries (KIBs) remains unsatisfying. More effort needed improve specific capacity maintaining a superior rate capability. As an attempt, nitrogen/oxygen dual-doped hierarchical porous hard carbon (NOHPHC) introduced as anode in KIBs by carbonizing and acidizing NH2 -MIL-101(Al) precursor. Specifically, NOHPHC electrode delivers high reversible capacities 365...

Binary metal oxides have been regarded as ideal and potential anode materials, which can ameliorate offset the electrochemical performance of single oxides, such reversible capacity, structural stability electronic conductivity. In this work, monodisperse NiCo2O4 mesoporous microspheres are fabricated by a facile solvothermal method followed pyrolysis Ni0.33Co0.67CO3 precursor. The Brunauer–Emmett–Teller (BET) surface area is determined to be about 40.58 m2 g–1 with dominant pore diameter...

Abstract In this work, a novel hydrothermal route is developed to synthesize cobalt carbonate hydroxide, Co(CO 3 ) 0.5 (OH)·0.11H 2 O. method, sodium chloride salt utilized organize single‐crystalline nanowires into chrysanthemum‐like hierarchical assembly. The morphological evolution process of organized product investigated by examining different reaction intermediates during the synthesis. growth and thus final assembly O can be finely tuned selecting preparative parameters, such as molar...

Abstract Flower power : Various mesoporous Co 3 O 4 architectural structures (see figure) have been successfully prepared through a facile binary‐solution route and sequential thermal decomposition at atmospheric pressure. The electrochemical experiments showed that the specific capacitance of nanosheets was higher than microspheres in KOH electrolyte. magnified image Novel complex 2D 3D architectures oxide semiconductor , including nanosheets, nearly monodisperse are self‐assembled from...

Dendrite growth of metal anodes is one the key hindrances for both secondary aqueous batteries and nonaqueous batteries. In this work, a freestanding Ti3C2Tx MXene@Zn paper designed as zinc anode lithium host to address issue. The binder-free exhibits merits good mechanical flexibility, high electronic conductivity, hydrophilicity, lithiophilicity. crystal mechanism Zn on common foil composite also studied. It found that can effectively suppress dendrite Zn, enabling reversible fast...

A facile and general way for the synthesis of porous hollow complex oxides is highly desirable owing to their significant applications energy storage other fields. In this contribution, uniform Mn0.33Co0.67CO3 Co0.33Mn0.67CO3 microspheres are firstly fabricated solvothermally just by tuning molar ratio Mn Co. Subsequently, growth multiporous MnCo2O4 CoMn2O4 quasi-hollow topotactic chemical transformation from corresponding precursors realized through a non-equilibrium heat treatment process....

Despite the desirable advancement in synthesizing transition-metal phosphides (TMPs)-based hybrid structures, most methods depend on foreign-template-based multistep procedures for tailoring specific structure. Herein, a self-template and recrystallization-self-assembly strategy one-step synthesis of core-shell-like cobalt phosphide (CoP) nanoparticles embedded into nitrogen phosphorus codoped porous carbon sheets (CoP⊂NPPCS), is first proposed. Relying unusual coordination ability melamine...

The first synthesis of MnO@Mn3 O4 nanoparticles embedded in an N-doped porous carbon framework (MnO@Mn3 /NPCF) through pyrolysis mixed-valent Mn8 clusters is reported. unique features /NPCF are derived from the distinct interfacial structure clusters, implying a new methodological strategy for hybrids. characteristics determined by conducting high angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) and energy loss spectroscopy (EELS) valence-state analyses. Due to...

Rechargeable aqueous zinc-ion batteries (AZIBs) have captured a surge of interest in recent years as promising alternative for scalable energy storage applications owing to the intrinsic safety, affordability, environmental benignity, and impressive electrochemical performance. Despite facilitated development this technology by many investigations, however, its smooth implementation is still plagued inadequate density undesirable life span, which calls an efficient controllable cathode...

A facile two‐step strategy involving a polyol method and subsequent thermal annealing treatment is successfully developed for the large‐scale preparation of ZnCo 2 O 4 various hierarchical micro/nanostructures (twin mcrospheres microcubes) without surfactant assistance. To best our knowledge, this first report on synthesis mesoporous twin microspheres microcubes. More significantly, based effect reaction time morphology evolution precursor, brand‐new crystal growth mechanism, multistep...

Abstract A facile one‐step hydrothermal method is developed for large‐scale production of well‐designed flexible and free‐standing Co 3 O 4 /reduced graphene oxide (rGO)/carbon nanotubes (CNTs) hybrid paper as an electrode electrochemical capacitors. Densely packed unique monolayer microsphere arrays uniformly cover the surface rGO/CNTs film. The alkaline treatment leads to not only deposition microspheres array, but also reduction GO sheets at same time. evaluated capacitors without any...

Abstract Lithium–sulfur batteries (LSBs) with a high theoretical capacity of 1675 mAh g −1 hold promise in the realm high‐energy‐density Li–metal batteries. To cope shuttle effect and sluggish transformation soluble lithium polysulfides (LiPSs), varieties traditional metal‐based materials (such as metal, metal oxides, sulfides, nitrides, carbides) unique catalytic activity for accelerating LiPSs redox have been exploited to fundamentally inhibit improve performance LSBs. Concurrently, some...

Co–Zn/N–C polyhedral nanocages: porous bimetallic Co/Zn embedded N-doped carbon (Co–Zn/N–C) nanocages have been synthesized through annealing a ZIF-8@ZIF-67 precursor for the first time. The excellent lithium-storage ability is attributed to unique structure of Co–Zn/N–C.

An integrated composite tin sulfide bonded on an amino-functionalized graphene as a novel anode material for NIBs is reported. Tight contact with SnS₂nanocrystals and discharge products the interface results in excellent electrochemical performance.

Sodium-ion batteries (SIBs) are considered promising next-generation energy storage devices. However, a lack of appropriate high-performance anode materials has prevented further improvements. Here, hierarchical porous hybrid nanosheet composed interconnected uniform TiO2 nanoparticles and nitrogen-doped graphene layer networks (TiO2 @NFG HPHNSs) that synthesized using dual-functional C3 N4 nanosheets as both the self-sacrificing template carbon source is reported. These HPHNSs deliver high...

Silicon is considered as one of the most favorable anode materials for next-generation lithium-ion batteries. Nanoporous silicon synthesized via a green, facile, and controllable vacuum distillation method from commercial Mg2Si alloy. formed by evaporation low boiling point Mg. In this method, magnesium metal alloy can be recycled. The pore sizes nanoporous secured adjusting distillated temperature time. optimized (800 °C, 0.5 h) delivers discharge capacity 2034 mA h g-1 at 200 100 cycles,...

Vanadium-based compounds with an open framework structure have become the subject of much recent investigation into aqueous zinc-ion batteries (AZIBs) due to high specific capacity. However, there are some issues vanadium dissolution from a cathode as well generation byproducts during discharge that should not be ignored, which could cause severe capacity deterioration and inadequate cycle life. Herein, we report several barium vanadate nanobelt cathodes constructed two sorts architectures,...

Abstract Silicon (Si) and lithium metal are the most favorable anodes for high‐energy‐density lithium‐based batteries. However, large volume expansion low electrical conductivity restrict commercialization of Si anodes, while dendrite formation prohibits applications lithium‐metal anodes. Here, uniform nanoporous Si@carbon (NPSi@C) from commercial alloy CO 2 is fabricated tested as a stable anode lithium‐ion batteries (LIBs). The porosity well graphitization degree thickness carbon layer can...

Potassium-ion batteries (KIBs) are considered favorable candidates for post-lithium-ion batteries, a quality attributed to their low cost, abundance as resource, and high working potential (-2.93 V K+/K). Owning its relatively potassiation theoretical capacity, antimony (Sb) is one of the most anodes KIBs. However, large volume changes during K-Sb alloying dealloying causes fast capacity degradation. In this report, nanoporous Sb (NP-Sb) fabricated by an environmentally friendly...

Owing to its high theoretical capacity, appropriate working potential, abundant resource, intrinsic safety, and low cost, zinc (Zn) metal is regarded as one of the most promising anode candidates for aqueous batteries. However, hazards caused by dendrite growth side reactions impede practical applications. Herein, solve these problems, a protective heterogeneous layer composed electronic conductive sulfur-doped three-dimensional (3D) MXene ionic ZnS on Zn designed constructed. The sulfur...

A novel nitrogen/oxygen co-doped carbon sponge (NOCS) is directly applied as a monolithic binder-free electrode for supercapacitors. It exhibits high specific capacitance and excellent electrochemical cyclability.

Defect-rich carbon materials possess high gravimetric potassium storage capability due to the abundance of active sites, but their cyclic stability is limited because low reversibility undesirable defects and deteriorative conductivity. Herein, in situ defect-selectivity order-in-disorder synergetic engineering via a self-template strategy reported boost K+ -storage capacity, rate simultaneously. The defect-sites are selectively tuned realize abundant reversible carbon-vacancies with...

Abstract Anode‐free zinc batteries (AFZBs) are proposed as promising energy storage systems due to their high density, inherent safety, low cost, and simplified fabrication process. However, rapid capacity fading caused by the side reactions between in situ formed metal anode electrolyte hinders practical applications. To address these issues, aqueous AFZBs enabled engineering form a stable interphase designed. By introducing multifunctional fluoride (ZnF 2 ) additive into electrolyte,...