Sb embedded TiO2/C spheres as high cyclability anode for lithium ion battery

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

“…Figure 5 a shows the electrochemical impedance spectroscopy (EIS) curves of the STC1, STC2, STC3, and TC electrodes. It can be clearly observed that the STC3 electrode shows a considerably smaller diameter in the high‐frequency range than other three electrodes, indicating STC3 electrode possesses an improved electrochemical performance, such as the reduced charge‐transfer impedances ( R ct ) [15, 26] . Figure 5 b shows the impedance spectrum and the equivalent electrical circuit of STC3 anode.…”

“…It can be clearly observed that the STC3 electrode shows ac onsiderably smaller diameter in the high-frequency range than other three electrodes, indicating STC3 electrode possesses an improved electrochemical performance, such as the reduced charge-transfer impedances (R ct ). [15,26] Figure 5b shows the impedance spectrum and the equivalent electrical circuit of STC3 anode. 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 ,t he constantp hase element (CPE), the Warburg impedance( W 0 ), and the intercalation capacitance (C int ).…”

“…Metal oxide TiO 2 hasb een ar esearch hotspot as an electrode materiald ue to its small volumec hange rate, [23] excellent cycle performance, andsafe and stable chemical properties. [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.…”

“…If the metal oxide can be modified, then it has good application prospects. 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] .…”

Rational Design of Porous TiO2@N‐Doped Carbon for High Rate Lithium‐Ion Batteries

“…On the one hand, researchers have composite TiO 2 with high conductive carbon materials, including graphene, carbon nanotubes, graphitic carbon, N‐doped carbon, and so on. On the other hand, TiO 2 is usually coupled or doped with high capacity materials, such as Nb, Ni, Si, Sb, MnO 2 , Co 3 O 4 , etc. Although remarkable results have been achieved, these fabrication methods were still complicated and costly.…”