Sandwich shelled TiO₂@Co₃O₄@Co₃O₄/C hollow spheres as anode materials for lithium ion batteries

Abstract

A sandwich shelled hollow TiO2@Co3O4@Co3O4/C composite is synthesized by consecutive coating of Co3O4 nanosheets and TiO2 particles on Co3O4/C hollow spheres.

Rational Construction of Self‐Standing Layered Polyhedral Co3O4/CoS2 Heterostructure Materials Boosting Superior Lithium Storage Performance

“…[ 58 ] Four distinct anode peaks become 0.24, 0.97, 2.01, and 2.41 V. According to the second and third cycles, the Co 3 O 4 /CoS 2 //CC demonstrates more prominent reversible redox reactions. According to above analysis and previously reported literatures, the Co 3 O 4 /CoS 2 //CC anode materials demonstrate the following lithium storage mechanism, and the electrochemical reaction equations are as follows: [ 10,21,59–62 ] $$\[ \begin{array}{*{20}{c}}{{\rm{Co}}{{\rm{S}}_2} + {\rm{xL}}{{\rm{i}}^ + } + x{{\rm{e}}^ - } \to {\rm{LixCo}}{{\rm{S}}_2}}\end{array} \]$$ $$\[ \begin{array}{*{20}{c}}{{\rm{LixCo}}{{\rm{S}}_2} + \left( {4 - x} \right){\rm{L}}{{\rm{i}}^ + } + \left( {4 - x} \right){{\rm{e}}^ - } \to {\rm{Co}} + 2{\rm{L}}{{\rm{i}}_2}{\rm{S}}}\end{array} \]$$ $$\[ \begin{array}{*{20}{c}}{{\rm{Co}}{{\rm{S}}_2} + 4{\rm{L}}{{\rm{i}}^ + } + 4{{\rm{e}}^ - } \leftrightarrow {\rm{Co}} + 2{\rm{L}}{{\rm{i}}_2}{\rm{S}}}\end{array} \]$$ $$\[ \begin{array}{*{20}{c}}{{\rm{C}}{{\rm{o}}_3}{{\rm{O}}_4} + {\rm{xLi}} \to {\rm{LixC}}{{\rm{o}}_3}{{\rm{O}}_4}}\end{array} \]$$ …”

“…Furthermore, the preparation of binder‐free electrode is also an effective way to avoid the utilization of the binder and hence decreases the contact resistance between active materials and current collector, which can extraordinarily promote the electron transfer and increase the capacity utilization of the active materials. [ 21–23 ]…”

Phytosynthesis of Co3O4 Nanoparticles as the High Energy Storage Material of an Activated Carbon/Co3O4 Symmetric Supercapacitor Device with Excellent Cyclic Stability Based on a Na2SO4 Aqueous Electrolyte

“…After 100 cycles at 0.2 A g –1 , the composite has a lithium storage capacity of 1081.78 mAh g –1 and 772.23 mAh g –1 after 300 cycles at 1 A g –1 . 35 …”

Titanate-derived Nb-doped TiO2 nanoparticles displaying improved lithium storage performance

“…Due to its chemical stability, environmental friendliness, high safety and moderate capacity, titanium oxide (TiO 2 ) has been considered as a promising alternative anode material for lithium-ion batteries (LIBs). [1][2][3] However, the intrinsically poor electronic conductivity and slow lithium-ion kinetics of TiO 2 limit its application in the field of high-power devices. Doping TiO 2 with metallic ions has been considered to be an effective strategy to improve the electronic conductivity of TiO 2 and achieve a fundamental enhancement of its lithium-ion intercalation.…”