Layer‐structured bismuth (Bi) is an attractive anode for Na‐ion and K‐ion batteries due to its large volumetric capacity and suitable redox potentials. However, the cycling stability and rate capability of the Bi anode are restricted by the large volume expansion and sluggish Na/K‐storage kinetics. Herein, a structural dimensionality reduction strategy is proposed and developed by converting 2D‐layer‐structured Bi into a quasi‐1D structured NiBi3 with enhanced reaction kinetics and reversibility to realize high‐rate and stable cycling performance for Na/K‐ion storage. As a proof of concept, the quasi‐1D intermetallic NiBi3 with low formation energy, metallic conductivity, and 3D Na/K‐ion diffusion pathways delivers outstanding capacity retention of 94.1% (332 mAh g−1) after 15 000 cycles for Na‐ion storage, and high initial coulombic efficiency of 93.4% with improved capacity retention for K‐ion storage. Moreover, investigations on the highly reversible Na/K‐storage reaction mechanisms and cycling‐driven morphology reconstruction further reveal the origins of the high reversibility and the accommodation to volume expansion. The finding of this work provides a new strategy for high‐performance anode design by structural dimensionality manipulation and cycling‐driven morphology reconstruction.

2D-Layer-Structure Bi To Quasi-1D-Structure NiBi3 : Structural Dimensionality Reduction to Superior Sodium and Potassium Ion Storage.

Research Progress towards the Corrosion and Protection of Electrodes in Energy-storage Batteries

The conventional weak acidic electrolyte for aqueous zinc-ion batteries breeds many challenges, such as undesirable side reactions, and inhomogeneous zinc dendrite growth, leading to low Coulombic efficiency, low specific capacity, and poor cycle stability. Here, an aqueous densified electrolyte, namely, a conventional aqueous electrolyte with addition of perovskite SrTiO3 powder, is developed to achieve high-performance aqueous zinc-ion batteries. The densified electrolyte demonstrates unique properties of reducing water molecule activity, improving Zn2+ transference number, and inducing homogeneous and preferential deposition of Zn (002). As a result, the densified electrolyte exhibits an ultra-long cycle stability over 1000 cycles in Zn/Ti half cells. In addition, the densified electrolyte enables Zn/MnO2 cells with a high specific capacity of 328.2 mAh g-1 at 1 A g-1 after 500 cycles under an extended voltage range. This work provides a simple strategy to induce dendrite-free deposition characteristics and high performance in high-voltage aqueous zinc-ion batteries. 

An aqueous electrolyte densified by perovskite SrTiO3 enabling high-voltage zinc-ion batteries

Texturing metallic zinc anodes (MZAs) for selective exposure of (002)Zn plane with high thermodynamical stability is an efficient scheme for dendrite‐free Zn electrodeposition. However, fundamental factors that influence Zn deposition morphology via surface crystallographic texture engineering are not well understood. Herein, different from traditional cognition, MZAs with preferential exposure of (101)Zn facet are demonstrated to be equally effective in promoting dendrite‐free Zn deposition, which is enabled by introducing trace amount (0.01 m) of theophylline into ZnSO4 electrolyte. Experimental results and mathematical model corroborate, indicating mechanistically that the theophylline derived cations preferentially adsorb on the (002)Zn crystal plane due to higher adsorption energy, thereby accelerating its growth through increased binding affinity with Zn2+ ions. Consequently, this phenomenon facilitates the texture exposure of (101)Zn facet to achieve ordered surface crystallographic orientation of MZAs (101‐Zn), thus enabling electrodeposition/dissolution cycling over 650 h under a depth of discharge up to 40% and significantly boosting the rechargeability (76.7% capacity retention after 1000 cycles) of the 101‐Zn||carbon‐cloth@MnO2 full battery relative to counterpart without theophylline additive (36.3%). The work offers deep insights on the scientific links between the surface crystallographic orientation of MZAs and Zn deposition morphology, while opens up vast untapped opportunities to realize dendrite‐free MZAs.

Texture Exposure of Unconventional (101)Zn Facet: Enabling Dendrite‐Free Zn Deposition on Metallic Zinc Anodes

Li/fluorinated carbon (Li/CFx) batteries are promising systems with ultrahigh energy density and long storage life. They are particularly suitable for emerging applications in military equipment, interventional medical devices, and spacecrafts....

Fundamentals of Li/CFx battery design and application

Recent Promise of Lead-free Halide Perovskites in Optoelectronic Applications

The influence of electrolyte concentration and solvent on operational voltage of Li/CF primary batteries elucidated by Nernst Equation

Tailoring the interactions of heterostructured Ni4N/Ni3ZnC0.7 for efficient CO2 electroreduction

Transition metal sulfides demonstrate attractive potential for sodium storage owing to their high theoretical specific capacity and high reserve. However, the low conductivity and volume expansion deteriorate their high-rate performance and cycling stability. In this work, we construct NiS 2 /FeS heterostructure by growing Ni-based layered double hydroxide nanosheets on Fe-based Prussian Blue nanocrystals followed by gaseous sulfurization, giving rise to flower-like NiS 2 /FeS nanoparticles. The as-prepared nanocomposite exhibits good rate performance of 156 mAh g −1 at 50 A g −1 and long cycle life of 606 mAh g −1 at 5 A g −1 after 1,000 cycles, which are superior to the heterostructure-free counterpart of NiS 2 and FeS. Density functional theory calculation further verifies that the enhanced electrochemical performance of NiS 2 /FeS is due to the existence of interface derived from the heterostructure. 

NiS
 2
 /FeS Heterostructured Nanoflowers for high-performance sodium storage

Homogeneously Distributed Heterostructured Interfaces in Rice Panicle-Like SbBi-Bi2Se3-Sb2Se3 Nanowalls for Robust Sodium Storage

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Papers

Recent Promise of Lead-free Halide Perovskites in Optoelectronic Applications

The influence of electrolyte concentration and solvent on operational voltage of Li/CF primary batteries elucidated by Nernst Equation

Tailoring the interactions of heterostructured Ni4N/Ni3ZnC0.7 for efficient CO2 electroreduction

NiS 2 /FeS Heterostructured Nanoflowers for high-performance sodium storage

Homogeneously Distributed Heterostructured Interfaces in Rice Panicle-Like SbBi-Bi2Se3-Sb2Se3 Nanowalls for Robust Sodium Storage