Rechargeable aqueous Zn-ion batteries are attractive cheap, safe and green energy storage technologies but bottlenecked by limitation in high-capacity cathode compatible electrolyte to achieve satisfactory cyclability. Here we report the application of nonstoichiometric ZnMn2O4/carbon composite as a new Zn-insertion material Zn(CF3SO3)2 electrolyte. In 3 M solution that enables ∼100% Zn plating/stripping efficiency with long-term stability suppresses Mn dissolution, spinel/carbon hybrid...

We report an aqueous Zn–V2O5 battery chemistry employing commercial V2O5 cathode, Zn anode, and 3 M Zn(CF3SO3)2 electrolyte. elucidate the Zn-storage mechanism in cathode to be that hydrated Zn2+ can reversibly (de)intercalate through layered structure. The function of co-intercalated H2O is revealed shielding electrostatic interactions between host framework, accounting for enhanced kinetics. In addition, pristine bulk gradually evolves into porous nanosheets upon cycling, providing more...

Lithium metal is considered a “Holy Grail” of anode materials for high‐energy‐density batteries. However, both dendritic lithium deposition and infinity dimension change during long‐term cycling have extremely restricted its practical applications energy storage devices. Here, thermal infusion strategy prestoring into stable nickel foam host demonstrated composite achieved. In comparison with the bare lithium, exhibits voltage profiles (200 mV at 5.0 mA cm −2 ) small hysteresis beyond 100...

Ultrasmall Sn nanodots (1-2 nm) are homogeneously encapsulated in porous N-doped carbon nanofibers using a simple and scalable electrospinning method. The composite weave into flexible free-standing membrane can be directly used as binder- current collector-free anode for Na-ion batteries, exhibiting excellent electrochemical performance with high reversible capacity, exceptional rate capability, ultralong cycle life.

Designed as a high‐capacity, high‐rate, and long‐cycle life anode for sodium‐ion batteries, ultrasmall Sn nanoparticles (≈8 nm) homogeneously embedded in spherical carbon network (denoted 8‐Sn@C) is prepared using an aerosol spray pyrolysis method. Instrumental analyses show that 8‐Sn@C nanocomposite with 46 wt% BET surface area of 150.43 m 2 g −1 delivers initial reversible capacity ≈493.6 mA h at the current density 200 , high‐rate 349 even 4000 stable ≈415 after 500 cycles 1000 . The...

Abstract Rechargeable aqueous zinc batteries have gained considerable attention for large‐scale energy storage systems because of their low cost and high safety, but they suffer from limitations in cycling stability density with advanced cathode materials. Here, a high‐performance V 5 O 12 ·6H 2 (VOH) nanobelt uniformly located on stainless‐steel substrate via facile electrodeposition technique is reported. We show that the hydrated layered VOH enables highly reversible ultrafast Zn 2+...

This review is focused on the recent progress and strategies in fabrication of high performance anode materials for Na-ion batteries.

To develop a long cycle life and good rate capability electrode, 3D hierarchical porous α‐Fe 2 O 3 nanosheets are fabricated on copper foil directly used as binder‐free anode for lithium‐ion batteries. This electrode exhibits high reversible capacity excellent capability. A up to 877.7 mAh g −1 is maintained at C (2.01 ) after 1000 cycles, even when the current increased 20 (20.1 ), of 433 mA h retained. The unique nanostructure improves electronic–ionic transport, mitigates internal...

MnFe2O4 nanodots (∼3.3 nm) homogeneously dispersed in porous nitrogen-doped carbon nanofibers (denoted as MFO@C) were prepared by a feasible electrospinning technique. Meanwhile, MFO@C with the character of flexible free-standing membrane was directly used binder- and current collector-free anode for sodium-ion batteries, exhibiting high electrochemical performance high-rate capability (305 mA h g–1 at 10000 comparison 504 100 g–1) ultralong cycling life (ca. 90% capacity retention after...

A simple and template‐free method for preparing three‐dimensional (3D) porous γ ‐Fe 2 O 3 @C nanocomposite is reported using an aerosol spray pyrolysis technology. The contains inner‐connected nanochannels nanoparticles (5 nm) uniformly embedded in a carbon matrix. size of nanograins content can be controlled by the concentration precursor solution. unique structure 3D offers synergistic effect to alleviate stress, accommodate large volume change, prevent aggregation, facilitate transfer...

Abstract Layered materials have great potential as cathodes for aqueous zinc‐ion batteries (AZIBs) because of their facile 2D Zn 2+ transport channels; however, either low capacity or poor cycling stability limits practical applications. Herein, two classical layered are innovatively combined by intercalating graphene into MoS 2 gallery, which results in significantly enlarged interlayers (from 0.62 to 1.16 nm) and enhanced hydrophilicity. The sandwich‐structured /graphene nanosheets...

This review summarizes the rational design and efficient synthesis of metal sulfides with controlled morphologies, sizes, compositions, micro/nano-structures, along their energy-related applications in Li/Na/Mg-ion batteries, supercapacitors, oxygen reduction reaction, hydrogen evolution storage.

Designed as a high-capacity, high-rate, and long-cycle life anode for sodium ion batteries, exfoliated-SnS2 restacked on graphene is prepared by the hydrolysis of lithiated SnS2 followed facile hydrothermal method. Structural morphological characterizations demonstrate that ultrasmall nanoplates (with typical size 20-50 nm) composed 2-5 layers are homogeneously decorated surface graphene, while hybrid structure self-assembles into three-dimensional (3D) network architecture. The obtained...

A graphene-like MoS₂/graphene nanocomposite exhibits excellent electrochemical performance with high capacity, rate capability and good cyclability as the anode for lithium-ion batteries.

Although transition metal oxide electrodes have large lithium storage capacity, they often suffer from low rate capability, poor cycling stability, and unclear additional capacity. In this paper, CoO nanowire clusters (NWCs) composed of ultra‐small nanoparticles (≈10 nm) directly grown on copper current collector are fabricated evaluated as an anode binder‐free lithium‐ion batteries, which exhibits ultra‐high capacity good capability. At a 1 C (716 mA g −1 ), reversible high 1516.2 h is...

NaVPO 4 F has received a great deal of attention as cathode material for Na‐ion batteries due to its high theoretical capacity (143 mA h g −1 ), voltage platform, and structural stability. Novel F/C nanofibers are successfully prepared via feasible electrospinning method subsequent heat treatment self‐standing batteries. Based on the morphological microstructural characterization, it can be seen that smooth continuous with nanoparticles (≈6 nm) embedded in porous carbon matrix. For...

NASICON (Na superionic conductor)-type cathode materials for sodium-ion batteries (SIBs) have attracted extensive attention due to their mechanically robust three-dimensional (3D) framework, which has sufficient open channels fast Na+ transportation. However, they usually suffer from inferior electronic conductivity and low capacity, severely limit practical applications. To solve these issues, we need deeply understand the structural evolution, redox mechanisms, electrode/electrolyte...

Abstract Sodium‐ion batteries (SIBs) have attracted incremental attention as a promising candidate for grid‐scale energy‐storage applications. To meet practical requirements, searching new cathode materials with high energy density is of great importance. Herein, novel Na superionic conductor (NASICON)‐type 4 MnCr(PO ) 3 developed high‐energy SIBs. The nanoparticles homogeneously embedded in carbon matrix can present an extraordinary reversible capacity 160.5 mA h g −1 three‐electron...

Abstract Aqueous Zn‐storage behaviors of MoS 2 ‐based cathodes mainly rely on the ion‐(de)intercalation at edge sites but are limited by inactive basal plane. Herein, an in‐situ molecular engineering strategy in terms structure defects manufacturing and O‐doping is proposed for (designated as D‐MoS ‐O) to unlock inert plane, expand interlayer spacing (from 6.2 9.6 Å), produce abundant 1T‐phase. The tailored ‐O with excellent hydrophilicity high conductivity allows 3D Zn 2+ transport along...

Abstract Maricite NaFePO 4 nanodots with minimized sizes (≈1.6 nm) uniformly embedded in porous N‐doped carbon nanofibers (designated as @C) are first prepared by electrospinning for maximized Na‐storage performance. The obtained flexible @C fiber membrane adherent on aluminum foil is directly used binder‐free cathode sodium‐ion batteries, revealing that the ultrasmall nanosize effect well a high‐potential desodiation process can transform generally perceived electrochemically inactive...

MOF-derived CoSe₂ hollow microspheres have been fabricated for the high-performance oxygen evolution reaction.

We report the synthesis and anode application for sodium-ion batteries (SIBs) of WS2 nanowires (WS2 NWs). NWs with very thin diameter ≈25 nm expanded interlayer spacing 0.83 were prepared by using a facile solvothermal method followed heat treatment. The as-prepared evaluated as materials SIBs in two potential windows 0.01-2.5 V 0.5-3 V. displayed remarkable capacity (605.3 mA h g(-1) at 100 ) but irreversible conversion reaction window In comparison, showed reversible intercalation...

Abstract The construction of bifunctional electrode materials for hydrogen evolution reaction (HER) and lithium‐ion batteries (LIBs) has been a hot topic research. Herein, metal–organic frameworks (MOFs) derived micro‐/nanostructured Ni 2 P/Ni hybrids with porous carbon coating (denoted as P/Ni@C) are prepared using feasible pyrolysis–phosphidation strategy. On the one hand, optimal P/Ni@C catalyst exhibits superior HER performance low overpotential 149 mV versus reversible (RHE) at 10 mA cm...