Dendritic silver hierarchical structures for anode materials in Li ion batteries

Abstract

Dendritic silver hierarchical structures were prepared via a simple electrochemical deposition method in the presence of citric acid. The influence of the molar ratio of citric acid and AgNO 3 , the deposition time and the deposition current on the crystalline and morphology of the products were studied by X-ray diffraction and scanning electron microscopy. Dendritic silver hierarchical structures consist of a long trunk with secondary branches, which grew in a parallel direction with a definite angle to the trunk. The average diameter of the trunk is 230-320 nm, that of the secondary branches is about 250 nm and the length of the branches is about 850 nm. The charge specific capacity of dendritic silver hierarchical structures was stable at around 250 mAh g −1 after 500 cycles at 0.1C. They also exhibited excellent rate capability at the various current rates from 0.1 to 5C.

Effects of Adsorbate Diffusion and Edges in a Transition from Particle to Dendritic Morphology during Silver Electrodeposition

“…In recent years, silver deposits with a dendritic morphology attracted much attention as catalysts of various reactions , for their remarkable superhydrophobicity, for their antibacterial activity, and in other technological applications. ,,− The special properties of those structures are related to the high specific surface areas and to the hierarchical organization in tree-like or feather-like shapes. Electrodeposition is among the cheapest and most accurate techniques used to grow such nanostructures .…”

Performance and application of Si/Ti3C2T x (MXene) composites in lithium ion battery

“…nanoparticles (SiNPs), nanowires, nanotubes, hollow nanostructures, and porous structures have been proven to enhance the performances of Si-based negatrodes to different extents [8][9][10][11]. Secondly, compositing with other materials such as carbon [12][13][14][15][16][17], metal [18][19][20], and metal oxides [21,22] could combine the advantages of both Si and other materials into the negatrode with larger capacity, longer cycle life, and higher stability. For example, the famous two-dimensional (2D) material, graphene, has been utilized as a buffer layer and conducting layer in Si-based composites due to its favorable flexibility, strength, and conductivity, which could help stabilize the integrity of Si and also assist the conduction of electron and Li + ion [15,[23][24][25][26].…”

One-step green synthesis of 2D Ag-dendrite-embedded biopolymer hydrogel beads as a catalytic reactor

“…[21][22][23][24][25][26][27][28] Several methods have been developed to synthesize these noble-metal nanocrystals with dendritic structures, including electrochemical deposition, electroless redox reactions, photochemical reduction, a sonoelectrochemical method, and a microwave-assisted solution method. [29][30][31][32][33][34][35][36][37][38] However, most of these methods require expensive and/or sophisticated equipment, a long reaction time, an elevated reaction temperature, complex synthesis steps, specic additives such as surfactants, and a supplementary etching process to remove the templates or surfactants. 39,40 Therefore, synthesizing Ag dendrites through a simple synthetic method without surfactants or harmful materials and under ambient conditions remains a challenge.…”