Rational design of the pea-pod structure of SiO_x/C nanofibers as a high-performance anode for lithium ion batteries

Abstract

Pea-pod structured SiOx/C nanofibers were synthesized by the electrospinning method, whose structure can be controlled by adjusting the addition amounts of organosilica-polymer nanospheres and they exhibit superior electrochemical performance.

Tunable Synthesis of Hierarchical Yolk/Double‐Shelled SiOx@TiO2@C Nanospheres for High‐Performance Lithium‐Ion Batteries

“…The impedance data were analyzed using Z ‐view software by fitting them to an equivalent electrical circuit composed of the solution resistance ( R s ), R ct , the constant phase element ( CPE ), the Warburg impedance ( W 0 ), and the intercalation capacitance ( C int ). R ct depends on the diameter of the semicircle in the high‐frequency region [28] . According to the fitting results, the value of the R s is 9.44 Ω, and the value of R ct is 103.55 Ω.…”

“…R ct depends on the diameter of the semicircle in the high-frequency region. [28] According to the fitting results, the value of the R s is 9.44 W,and the value of R ct is 103.55 W.…”

“…[24][25][26][27] However,T iO 2 also has its inherent disadvantages, such as semiconductor materials, poor electrical conductivity,a nd low theoretical capacity despite its stable cycle performance. [28] Current research strategiesi ncludet he combination of TiO 2 and highly conductive materials, such as carbon materials, or the combination of TiO 2 and high specific capacity materials.…”

“…Metal oxide TiO 2 has been a research hotspot as an electrode material due to its small volume change rate, [23] excellent cycle performance, and safe and stable chemical properties [24–27] . However, TiO 2 also has its inherent disadvantages, such as semiconductor materials, poor electrical conductivity, and low theoretical capacity despite its stable cycle performance [28] . Current research strategies include the combination of TiO 2 and highly conductive materials, such as carbon materials, or the combination of TiO 2 and high specific capacity materials.…”

Theoretical Study of a New Porous 2D Silicon-Filled Composite Based on Graphene and Single-Walled Carbon Nanotubes for Lithium-Ion Batteries

“…The disadvantage of the silicon anode material is its instability caused by significant change in volume that mayincrease to 300% during the process of lithiation/delithiation. This leads to mechanical destruction, and consequently, to a decrease in capacity, electrical conductivity, and to the formation of SEI-solid electrolyte interphase [13][14][15]. This problem can be solved by application of the so-called buffer electroconductive frame that can ensure the stability of the anode material volume.…”