In-situ grown CNTs modified SiO 2 /C composites as anode with improved cycling stability and rate capability for lithium storage

Enabling the ability of Li storage at high rate as anodes by utilizing natural rice husks-based hierarchically porous SiO2/N-doped carbon composites

“…S10a When the high rate increases to 5.0 A g -1 , meaning just five-minute discharging time, the discharge capacity is as high as 402 mAh g -1 . After the current density returns to the original 0.1 A g -1 , the reversible capacity maintains the value of 795 mAh g -1 , which is indicative of the remarkable rate capability in contrast with BM-RH-SiO 2 /C and the other SiO 2 /C materials reported in the previous literatures (Table S6) [13,[15][16][17][18][19]57]. The well-developed hierarchical porosity can accelerate electrolyte permeation and shorten the distance of ions diffusion, and the improved electrical conductivity allows the rapid electron transport, which can effectively boost electrochemical kinetics.…”

“…Wang et al prepared the SiO 2 /C/CNTs composites through an in-situ chemical vapor deposition (CVD) strategy. With the current densities at 0.05 A g −1 and 1.0 A g −1 the corresponding unstable capacity is 500 mAh g −1 over 100 cycles and 315 mAh g −1 after 1000 cycles [16]. Nita et al prepared the carbon/SiO 2 hybrid materials with interpenetrating network, in which tetraethyl orthosilicate (TEOS) was chosen as the precursor and the size of the synthesized SiO 2 particles is 2-5 nm.…”

Nanostructured diatom earth SiO2 negative electrodes with superior electrochemical performance for lithium ion batteries

“…3b, exhibit two peaks during the rst lithiation at 1.45 V and 0.78 V, which have been previously reported and are associated with irreversible reactions and SEI formation. 2,3,14,34,35 In the 5 th cycle the consolidation of two anodic peaks at approximately 0.31 V and 0.45 V, and two cathodic peaks at approximately 0.04 V and 0.17 V, all of them associated with silicon alloying/dealloying reactions, 36,37 are evidenced. The evolution of discharge capacity (i.e.…”

A Review: The Development of SiO2/C Anode Materials for Lithium-Ion Batteries

“…147,148 In general, using carbon materials with better structural integrity might enhance the electrical conductivity and cycle life. 86 The unique structure of CNTs can improve the cycling stability and rate capability of SiO 2 by reducing the time of lithiumion diffusion and providing a more active site for the interaction of ions. 146 The transport of electrons in the CNT occurs due to the quantum effects, so the CNTs can conduct electricity without scattering and dissipating heat.…”

“…149 In composite SiO 2 /CNT, CNTs can enhance the conductivity of SiO 2 and play a role in absorbing the mechanical stress of SiO 2 during the cycling process and act as a buffer to resist the volume. 86,150,151 The CNTs in the rational structure of composite SiO 2 /CNT can offer a more exposed active site for lithium-ion adsorption to facilitate electron transfer, which might improve the energy density, rate performance, and cycle life. 152,153 The large diameter of CNTs is also a good matrix material for encapsulating SiO 2 owing to its large inner space and conductivity.…”