One-step synthesis of uniformly distributed SiO_x–C composites as stable anodes for lithium-ion batteries

Abstract

SiOx is one of the most promising anode materials for lithium-ion batteries (LIBs), due to its high theoretical capacity and low cost. However, the huge volume expansion and low electron/ion...

Batch-Scale Synthesis and Interfacially Enhanced Stability of Silicon Suboxide-Based Anodes toward High-Performance Lithium-Ion Batteries

“…Figure d displays the high-resolution Si 2p XPS spectrum of the Pre-TA precursor, with deconvoluted peaks at 102.8 and 102.1 eV corresponding to Si 3+ and Si 2+ , , respectively. Figure e shows the high-resolution Si 2p XPS spectrum of T-SiO x /C/CNTs, indicating that silicon exists primarily in the forms of Si 4+ and Si 3+ , with corresponding deconvoluted peaks at 104.6 and 103.8 eV . Furthermore, Figure f shows that the C 1s spectrum can be deconvoluted into three peaks corresponding to C–C, C–N, and C–O bonds.…”

“…Figure 2e shows the high-resolution Si 2p XPS spectrum of T-SiO x /C/CNTs, indicating that silicon exists primarily in the forms of Si 4+ and Si 3+ , with corresponding deconvoluted peaks at 104.6 and 103.8 eV. 35 Furthermore, Figure 2f 36 FTIR was also used to characterize the organic functional groups on the sample surfaces. Figure S6 and Figure 2h show the FTIR spectra of the Pre-TA and T-SiO x /C/CNTs samples, respectively.…”

Review on Improving the Performance of SiOx Anodes for a Lithium-Ion Battery through Insertion of Heteroatoms: State of the Art and Outlook

“…This additionally shows that multiple doping can help achieve a stable amorphous structure, leading to improved cyclability and rate capability. Siyu et al 50 realized SiO x −C composite materials co-doped with both nitrogen and phosphorus using a molecular polymerization method. SiO and carbon were uniformly dispersed at the atomic level along with the embedded carbon nanotubes.…”

Modified preparation of Si@C@TiO2 porous microspheres as anodes for high-performance lithium-ion batteries

“…), [4][5][6][7][8][9] silicon (Si) is considered as a candidate for the next-generation anode material owing to its ultrahigh specific capacity of 3580 mA h g −1 , environmental friendliness, natural abundance and a low discharge potential (≈0.4 V vs. Li/Li + ). [10][11][12] However, there are two inherent disadvantages in Si-based materials that hinder their large-scale application as anodes for LIBs. During lithiation, the massive volume expansion (≈300%) of Si-based materials causes a constant change in stress/strain in the elec-trode, which leads to structural pulverization and continuous formation of solid-electrolyte interphase (SEI) films, resulting in rapid capacity degradation.…”