Biomass-Mediated Synthesis of Cu-Doped TiO₂ Nanoparticles for Improved-Performance Lithium-Ion Batteries

Abstract

Pure TiO2 and Cu-doped TiO2 nanoparticles are synthesized by the biomediated green approach using the Bengal gram bean extract. The extract containing biomolecules acts as capping agent, which helps to control the size of nanoparticles and inhibit the agglomeration of particles. Copper is doped in TiO2 to enhance the electronic conductivity of TiO2 and its electrochemical performance. The Cu-doped TiO2 nanoparticle-based anode shows high specific capacitance, good cycling stability, and rate capability performance for its envisaged application in lithium-ion battery. Among pure TiO2, 3% Cu-doped TiO2, and 7% Cu-doped TiO2 anode, the latter shows the highest capacity of 250 mAh g–1 (97.6% capacity retention) after 100 cycles and more than 99% of coulombic efficiency at 0.5 A g–1 current density. The improved electrochemical performance in the 7% Cu-doped TiO2 is attributed to the synergetic effect between copper and titania. The results reveal that Cu-doped TiO2 nanoparticles might be contributing to the enhanced electronic conductivity, providing an efficient pathway for fast electron transfer.

Dye degradation performance, bactericidal behavior and molecular docking analysis of Cu-doped TiO2 nanoparticles

“…These planes belong to tetragonal anatase phase of Cu-doped TiO 2 that correlates with standard spectrum (JCPDS card 21-1272) along with space group I4 1 /amd (141) with corresponding cell dimensions of a ¼ 3.758 A and c ¼ 9.513 A. [47][48][49][50][51][52][53][54][55][56][57] The lattice spacing is $0.35 nm for TiO 2 equivalent to (101) facet, also validated with HR-TEM observation (see Fig. 9).…”

“…5a depicts higher peak intensity of doped samples compared to control sample which signies effective incorporation of Cu such that the dopant boosts the crystallinity and enhances the structural quality of host sample. 54 In addition, in Fig. 5a 0 a notable shi of anatase reection (101) to higher angles (25.3 to 25.9 ) was observed with increasing dopant concentration.…”

“…As a result, the intensity ratio of dopant peak is lower in comparison with the host material. 47,54,55 Fig. 5a depicts higher peak intensity of doped samples compared to control sample which signies effective incorporation of Cu such that the dopant boosts the crystallinity and enhances the structural quality of host sample.…”

TiO2 Nanocrystal‐Framed Li2TiSiO5 Platelets for Low‐Voltage Lithium Battery Anode

“…[47][48][49][50] There is no CV peak below 1 V which can be attributed to TiO 2 . [51,52] The peak intensities of the T@Ls are in proportion to their TiO 2 structure contents. Among T@L3(800), T@L5(800), and T@L7(800), the relative peak intensity of TiO 2 compared with LTSO was gradually enhanced with the increase in t, due to the increased formation of TiO 2 content derived from the conversion of LTSO.…”

Marigold micro-flower like NiCo2O4 grown on flexible stainless-steel mesh as an electrode for supercapacitors

“…[7][8][9] On the other hand, transition metal oxides (TMOs) as electrode materials have been widely explored because of their high theoretical specic capacitances, abundance, high voltage window in aqueous electrolyte, environmental friendliness, and low-cost of electrode material for pseudocapacitors. [10][11][12][13][14] Unfortunately, most TMOs suffer from their weak electrical conductivities resulting in poor electrochemical performance. 15,16 To circumvent this issue, researchers developed mixed TMOs with different metal cations demonstrating the synergic effect, reversible capacity, structural stability, more active reaction sites for redox (faradaic) reaction, and higher electrical conductivity compared to TMOs.…”