Porous silicon structure battery
A tandem structure of porous silicon film on single-walled carbon nanotube (SWNT) film is presented to significantly improve the cycling stability of silicon as lithium-ion battery anode material and will provide a powerful means for the development of lithium- ion batteries. Development of materials and structures leading to high energy and power density … - Download [PDF]
Tandem structure of porous silicon film on single-walled carbon ...
A tandem structure of porous silicon film on single-walled carbon nanotube (SWNT) film is presented to significantly improve the cycling stability of silicon as lithium-ion battery anode material and will provide a powerful means for the development of lithium- ion batteries. Development of materials and structures leading to high energy and power density …
The Transition to Lithium-Silicon Batteries
Additionally, the porous carbon structures'' inherent tunability means we can meet different silicon content needs with relative ease, adjusting for capacity and cycle stability control. Furthermore, having a carbon-silicon interface allows for good electronic conductivity, which is important for rate capability (an ability to generate a ...
Surface Binding of Polypyrrole on Porous Silicon Hollow …
Uniform porous silicon hollow nanospheres are prepared without any sacrificial templates through a magnesiothermic reduction of mesoporous silica hollow nanospheres and surface modified by the following in situ chemical polymerization of polypyrrole. The porous hollow structure and polypyrrole coating contribute significantly to the excellent structure stability and …
A hierarchical porous hard carbon@Si@soft carbon material for …
Hierarchical porous silicon structures with extraordinary mechanical strength as high-performance lithium-ion battery anodes
Porous Silicon and Li-Ion Batteries | SpringerLink
Zhao Y, Liu X, Li H, Zhai T, Zhou H (2012) Hierarchical micro/nano porous silicon Li-ion battery anodes. Chem Commun 48:5079–5081. Article CAS Google Scholar Zheng H, Fang S, Tong ZK, Dou H, Zhang XG (2016) Porous silicon@Polythiophene core-shell nanospheres for lithium-ion batteries. Part Part Syst Charact 33:75–81
Preparation and anti-reflection performance of porous silicon/gold ...
2.1 Experimental design. Among the many methods for preparing porous silicon, electrochemical anodic corrosion is widely used because of its speed and simplicity. In the etching process of porous silicon, electrolyte and current density, etching time will affect the surface morphology of porous silicon, and there have been many studies on these parameters, which …
(PDF) Review of porous silicon preparation and its application for ...
Three types of porous silicon structures. (a) SEM images of the inverse opal structure from 890 nm pre-sintered silica ... Hierarchical micro/nano porous silicon Li-ion battery. anodes Chem ...
Flexible-rigid covalent nano-template of micron porous silicon …
Developing robust micron porous silicon (MPSi) anodes has received much attention for next-generation lithium (Li)-ion batteries. Nevertheless, localized high stresses during fabrication and cycling tremendously bring about structural failure and capability degradation. Herein, a flexible-rigid covalent nano
Dynamic magnesiothermic reduction of various silica to porous …
A dynamic magnesiothermic reduction (DMR) of various silica having different size and porosity is conducted to study the effects of silica properties on the ⅰ) DMR reaction …
(PDF) Advances of Synthesis Methods for Porous Silicon-Based …
To address these problems existed for applications, nanostructured silicon materials, especially Si-based materials with three-dimensional (3D) porous structures have received extensive attention ...
The Transition to Lithium-Silicon Batteries
Additionally, the porous carbon structures'' inherent tunability means we can meet different silicon content needs with relative ease, adjusting for capacity and cycle stability control. Furthermore, having a carbon-silicon interface allows for good …
Review of porous silicon preparation and its application for …
For lithium-ion batteries, a porous silicon electrode was prepared through electrochemical etching on a wafer with a hydrofluoric acid (HF) etching solution at a constant current density. The …
A new porous metallic silicon dicarbide for highly efficient Li-ion ...
First, we perform the global structure search based on Particle Swarm Optimization (PSO) algorithm as implemented in the CALPSO code [26] to find all the possible 3D structures of LiC 2 Si within a supercell containing 24 atoms (corresponding to six formulae) with lower energy and porous C 2 Si frame, three of which are shown in Fig. 1 (a–c) g. 1 (a) is the …
Porous Doped Silicon Nanowires for Lithium Ion Battery …
Figure 1. (a) Schematic diagram of a porous silicon structure. (b) One unit of the porous structure used for theoretical simulation and analysis. (c) Pore size before and after lithiation and (d) corresponding maximum stress at fixed pore-to-pore distance (l = …
Three-dimensional nitrogen-doped carbon coated hierarchically porous ...
Three-dimensional (3D) Nitrogen-doped carbon coated hierarchically porous silicon (hp-Si@NC) composite with cocontinuous skeletons and abundant interconnected macropores was prepared by a sol-gel route, followed by a magnesiothermic reduction and a polydopamine pyrolyzation. The BET specific surface area and pore volume of the obtained hp …
Porous interface for fast charging silicon anode
Compared with traditional carbon interface, the porous carbon interface with aligned mesopores and an average pore size centered at about 3 nm 24-26 would vastly improve the ion/electron transport, which …
A solid-state lithium-ion battery with micron-sized silicon anode ...
We envision this versatile elastic solid electrolyte to permeate and occupy the internal voids of the porous electrode, and have the ability to encapsulate the irregularly …
Scalable synthesis of ant-nest-like bulk porous silicon for high ...
The carbon-coated porous silicon anode delivers a high capacity of 1,271 mAh g −1 at 2,100 mA g −1 with 90% capacity retention after 1,000 cycles and has a low electrode …
Porous Silicon as Anode Material for Lithium-Ion Batteries
To achieve commercial viability, work is being pursued on silicon battery anode structures and processes with a special emphasis on the cost and environment. In this review book chapter, we will summarize recent development of a cost-effective electrochemically etched porous silicon as an anode material for lithium-ion batteries.
Porous interface for fast charging silicon anode
Compared with traditional carbon interface, the porous carbon interface with aligned mesopores and an average pore size centered at about 3 nm 24-26 would vastly improve the ion/electron transport, which simultaneously buffer-the volume expansion and retain the whole structure integrity. Porous carbon with electrochemical stability is an ideal ...
Porous silicon from industrial waste engineered for superior …
The silicon etched by HF solution possesses porous structure, which exhibits higher capacity than unetched samples. Comparatively, the silicon etched by NaOH solution has the flaky shape with about 110 nm and shows superior cycling performance and stability (600.7 mAh g−1 after 200 cycles at 420 mA g−1), which can be ascribed to its ...
Multi-step low-cost synthesis of ultrafine silicon porous …
We demonstrate multi-step synthesis of silicon porous structures with various particle sizes via low-cost annealing and pickling reactions from ball-milled Mg2Si or Si/Mg powder. Thereinto, the ultrafine Si porous structures (< …
Hierarchical porous silicon structures with extraordinary mechanical ...
Hierarchical porous silicon structures with extraordinary mechanical strength as high-performance lithium-ion battery anodes. ... to retain sufficient volumetric capacity density and high mechanical strength that can withstand calendering and other battery assembly procedures. The porous structure evolution from CNT@SiO 2 microsphere to CNT@Si ...
Review of porous silicon preparation and its application for lithium ...
In this review, the merits of using porous silicon for anodes through both theoretical and experimental study are discussed and recent progress in the preparation of porous silicon through the template-assisted approach and the non-template approach are highlighted. Silicon is of great interest for use as the anode material in lithium-ion batteries due to its high …
Design and Construction of Porous Silicon Materials as Stable …
Herein, we report the design and construction of novel porous silicon materials with regulated pore structure and surface oxygen content. The facile strategy for the synthesis of the materials is using Mg 2 Si and tetraethyl orthosilicate (TEOS) as Si resource, and the oxygen in the feedstock is ingeniously used at the same time.
(PDF) Hierarchical porous silicon structures with extraordinary ...
Hierarchical porous silicon structures with extraordinary mechanical strength as high-performance lithium-ion battery anodes ... Wu, H. et al. Stable cycling of double-walled silicon nanotube battery anodes through solid-electrolyte interphase control. Nat. Nanotechnol. 7, 309–314 (2012). Chen, D. Y. et al. Reversible lithium-ion storage in ...
Porous silicon derived from 130 nm Stöber silica as lithium‐ion battery ...
The size of the silica particles plays a vital role in the structure control of the porous silicon. In this work, silica particles with a diameter of 130 nm are used as templates to guide the ...
High-Temperature Magnesiothermic Reduction Enables HF-Free …
Porous silicon-based anode materials have gained much interest because the porous structure can effectively accommodate volume changes and release mechanical stress, leading to improved cycling performance. ... Magnesiothermic Reduction Enables HF-Free Synthesis of Porous Silicon with Enhanced Performance as Lithium-Ion Battery Anode …
Lithiated porous silicon nanowires stimulate periodontal ...
Particularly, the prelithiation of porous silicon nanowires has been extensively investigated, since the porous structure assists maintaining anode integrity through the volumetric expansions and ...
Multi-step low-cost synthesis of ultrafine silicon porous structures ...
We demonstrate multi-step synthesis of silicon porous structures with various particle sizes via low-cost annealing and pickling reactions from ball-milled Mg2Si or Si/Mg powder. Thereinto, the ultrafine Si porous structures (< 50 nm) have been prepared by the two-step alloying/de-alloying processes between Si and Mg, and the formation processes and …
Monodisperse Porous Silicon Spheres as Anode Materials for
Extensive research has been conducted on nanostructured silicon such as silicon nanoparticles 14, silicon nanotubes/nanowires 1,15, silicon thin films and 3D porous structures 16,17.
(PDF) Hierarchical porous silicon structures with …
Hierarchical porous silicon structures with extraordinary mechanical strength as high-performance lithium-ion battery anodes March 2020 Nature Communications 11(1)