Kashale Anil A, Dwivedi Pravin K, Sathe Bhaskar R, Shelke Manjusha V, Chang Jia-Yaw, Ghule Anil V
Department of Nanotechnology and Department of Chemistry, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad 431004, Maharashtra, India.
Department of Chemistry, Shivaji University, Kolhapur 416004, Maharashtra, India.
ACS Omega. 2018 Oct 31;3(10):13676-13684. doi: 10.1021/acsomega.8b01903. Epub 2018 Oct 19.
Pure TiO and Cu-doped TiO 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 TiO to enhance the electronic conductivity of TiO and its electrochemical performance. The Cu-doped TiO nanoparticle-based anode shows high specific capacitance, good cycling stability, and rate capability performance for its envisaged application in lithium-ion battery. Among pure TiO, 3% Cu-doped TiO, and 7% Cu-doped TiO anode, the latter shows the highest capacity of 250 mAh g (97.6% capacity retention) after 100 cycles and more than 99% of coulombic efficiency at 0.5 A g current density. The improved electrochemical performance in the 7% Cu-doped TiO is attributed to the synergetic effect between copper and titania. The results reveal that Cu-doped TiO nanoparticles might be contributing to the enhanced electronic conductivity, providing an efficient pathway for fast electron transfer.
采用孟加拉鹰嘴豆提取物通过生物介导的绿色方法合成了纯TiO和Cu掺杂的TiO纳米颗粒。含有生物分子的提取物充当封端剂，有助于控制纳米颗粒的尺寸并抑制颗粒的团聚。在TiO中掺杂铜以提高TiO的电子导电性及其电化学性能。基于Cu掺杂的TiO纳米颗粒的阳极在锂离子电池的设想应用中表现出高比电容、良好的循环稳定性和倍率性能。在纯TiO、3% Cu掺杂的TiO和7% Cu掺杂的TiO阳极中，后者在100次循环后显示出最高容量为250 mAh g（容量保持率为97.6%），在0.5 A g电流密度下库仑效率超过99%。7% Cu掺杂的TiO中电化学性能的改善归因于铜和二氧化钛之间的协同效应。结果表明，Cu掺杂的TiO纳米颗粒可能有助于提高电子导电性，为快速电子转移提供有效途径。
