Ternary perovskite nickel titanate/reduced graphene oxide nano-composite with improved lithium storage properties

Abstract

As anode materials, TiO2 exhibits a suitable potential, fast kinetics and excellent cycling performance, while other transition metal oxides (such as NiO) deliver a much higher theoretical capacity with a moderate kinetics and limited cycling performance. Herein, a novel perovskite NiTiO3/reduced graphene oxide (RGO) composite with a particle size of 40-50 nm was first synthesized by solvothermal method and introduced as anode materials for lithium-ion batteries. The structure morphology and electrochemical performance of NiTiO3/RGO nanocomposite were investigated by X-ray diffraction (XRD), Raman spectroscopy measurements, scanning electron microscopy (SEM), transmission electron microscopy (TEM), galvanostatic charge-discharge tests, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) tests. The NiTiO3/RGO nanocomposite delivers a higher discharge capacity (1110.7 mAh g -1 ) and better cycling stability (65.3 %), as well as improved rate capability over 50 cycles, compared with those of bare NiTiO3. The improved electrochemical properties of NiTiO3/RGO can be attributed to the good conductivity and large surface of RGO and the combination nanostructure of NiTiO3 and RGO.

Synergistic Catalytic Activity of Porous Rod-like TMTiO3 (TM = Ni and Co) for Reversible Hydrogen Storage of Magnesium Hydride

“…TMTiO 3 (TM = Ni and Co), a kind of titanium-based materials with ilmenite structure, possesses widespread application in the photocatalyst for the complete oxidation of hydrocarbons, hydrogen production, and negative materials for lithium batteries. − In this work, porous rod-like TMTiO 3 samples were designed and fabricated by a sol–gel method and calcination procedure, respectively, and the TMTiO 3 samples were first introduced into an MgH 2 system for hydrogen storage. The TMTiO 3 samples contain high catalytic activity elements for hydrogen storage properties of MgH 2 , and are expected to have high desorption kinetics and improving cycling performance under the synergistic catalytic reaction of Ni/Co and Ti elements.…”

Facile synthesis of perovskite CeMnO3 nanofibers as an anode material for high performance lithium-ion batteries

“…Between the layers, the insertion and deinsertion of Li + can achieve from this perovskite structure. 33 Therefore, CeMnO 3 NFs exhibit high reversible capacity compared with the other two samples. The cycling performances of CeO 2 , Mn 3 O 4 , and CeMnO 3 anodes under a current density of 200 mA g À1 with the voltage ranging from 0.01 to 3.0 V are presented in Fig.…”

“…Between the layers, the insertion and deinsertion of Li + can achieve from this perovskite structure. 33 Therefore, CeMnO 3 NFs exhibit high reversible capacity compared with the other two samples.…”

“…Compared with Mn 3 O 4 , the unique perovskite structure of CeMnO 3 can improve the diffusion of Li + , alleviate the structure collapse resulting from Li + insertion and extraction, and improve the cycle stability. 33 Aer 200 cycles the capacities of CeO 2 , Mn 3 O 4 , and CeMnO 3 anode are 175.6, 315 and 322.9 mA h g À1 , respectively. In comparison with common CeO 2 with the reversible capacity of 315 mA h g À1 aer 50 cycles, the fabricated CeMnO 3 as anode material exhibits more stable cycle life and higher capacity.…”

“…30 As a stable oxide, CeO 2 is used in the elds of electronic devices, catalysis, and electrochemical energy storage due to its favorably thermal stability, catalytic activity, and suitable valence states. [31][32][33] The charge mass transfer resistance is greatly reduced, and the electrochemical performance is highly improved by constructing ternary perovskite structure. 34 Till now, the application of CeMnO 3 nanobers with perovskite structure in lithium-ion batteries has not been studied.…”