Preparation of SiO₂nanowire arrays as anode material with enhanced lithium storage performance

Abstract

SiO2 nanowire arrays were synthesized using an AAO template-assisted sol–gel method. As a lithium negative electrode material, the sample exhibited excellent electrochemical properties.

High Lithium Storage Performance of Co Ion-Doped Li4Ti5O12 Induced by Fast Charge Transport

“…The addition of Co 3 O 4 effectively inhibited the growth of LTO nanoparticles. The grain refinement would improve the specific surface area of the composite ( Li et al, 2018 ). Figure 3C shows that the LTO nanoparticles were uniformly dispersed on the layered surface of Co 3 O 4 , indicating that LTO and Co 3 O 4 combined well.…”

Fast-Charging Anode Materials and Novel Nanocomposite Design of Rice Husk-Derived SiO2 and Sn Nanoparticles Self-Assembled on TiO2(B) Nanorods for Lithium-Ion Storage Applications

“…Thus, amorphous SiO 2 was reduced to form Si and Li 2 O in a discharge state at approximately 0.45 V, which agreed to eq . , The peak at 1.00 V suggests a chemical interaction between SiO 2 and Li + . As demonstrated in eqs and , when the material was first discharged, amorphous SiO 2 was converted to Si and produced Li 2 Si 2 O 5 or Li 4 SiO 4 . , The irreversible Li 4 SiO 4 phase produced during the reaction required a significant capacity. As indicated in eq , the characteristic peaks associated with the reversible alloy/de-alloy reaction with Li + of Si include cathodic peaks of 0.19–0.21 V, which correspond to the transformation from Si to Li x Si, and anodic peaks of 0.52 V (Li x Si to Si) .…”

Enhanced Electrochemical Performance Promoted by Tin in Silica Anode Materials for Stable and High-Capacity Lithium-Ion Batteries

“…High-capacity and low-cost materials have triggered vast interest in the past few years [ 15 , 16 , 17 , 18 , 19 , 20 , 21 ], which can bring great promise for next-generation LIBs with a higher price–performance ratio. Silica (SiO 2 ) has recently captured great attention as a promising candidate anode materials for LIBs because of its suitable working potential (~0.25 V vs. Li/Li + ), proper theoretical specific capacity (~1960 mAh·g −1 ), lesser volume variation (~100%), and expanded cycling lifespan compared to silicon and other alloys [ 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 ]. In addition, SiO 2 is one of the most abundant materials on earth, and its environmentally friendly and low-cost nature further turns it into an alternative electrode material [ 25 , 26 , 27 , 28 , 29 , 30 ].…”

“…However, the development of SiO 2 -based anode materials so far has been impeded due to its poor electrical conductivity and sluggish charge transfer kinetics. To overcome these limitations, extensive research efforts have been dedicated to the development of SiO 2 -based composite materials and structures, such as carbon-coated SiO 2 particles [ 32 , 35 , 36 ], SiO 2 /Cu polyacrylonitrile-C composite [ 33 ], Sn(SnO 2 )–SiO 2 /graphene nanocomposites [ 37 ], Bi 2 S 3 @SiO 2 core-shell microwires [ 38 ], Ni/SiO 2 hierarchical hollow spheres [ 39 ], and so on [ 34 , 40 ]. Even though significant progress has been achieved, the commercialization of SiO 2 -based anodes is still restricted by the low electrochemical activity.…”