Type

Journal Article

Authors

Colm O'Dwyer
Elaine Carroll
David McNulty

Subjects

Engineering

Topics
energy storage li ion batteries nanomaterials high rate lithium ion batteries life cycle tio2 inverse opals tio2 nanomaterials

Rutile TiO2 inverse opal anodes for Li-ion batteries with long cycle life, high-rate capability and high structural stability (2017)

Abstract Rutile TiO2 inverse opals provide long cycle life and impressive structural stability when tested as anode materials for Li-ion batteries. The capacity retention of TiO2 inverse opals (IOs) is greater than previously reported values for other rutile TiO2 nanomaterials, and the cycled crystalline phase and material interconnectivity is maintained over thousands of cycles. Consequently, this paper offers insight into the importance of optimizing the relationship between the structure and morphology on improving electrochemical performance of this abundant and low environmental impact material. TiO2 IOs show gradual capacity fading over 1000 and 5000 cycles, when cycled at specific currents of 75 and 450 mA g−1, respectively, while maintaining a high capacity and a stable overall cell voltage. TiO2 IOs achieve a reversible capacity of ≈170 and 140 mA h g−1 after the 100th and 1000th cycles, respectively, at a specific current of 75 mA g−1, corresponding to a capacity retention of ≈82.4%. The structural stability of the 3D IO phase from pristine rutile TiO2 to the conductive orthorhombic Li0.5TiO2 is remarkable and maintains its structural integrity. Image analysis conclusively shows that volumetric swelling is accommodated into the predefined pore space, and the IO periodicity remains constant and does not degrade over 5000 cycles.
Collections Ireland -> University College Cork -> College of Science, Engineering and Food Science
Ireland -> University College Cork -> Tyndall National Institute
Ireland -> University College Cork -> Tyndall National Institute - Journal Articles
Ireland -> University College Cork -> Chemistry
Ireland -> University College Cork -> Chemistry - Journal Articles
Ireland -> University College Cork -> Research Institutes and Centres

Full list of authors on original publication

Colm O'Dwyer, Elaine Carroll, David McNulty

Experts in our system

1
Colm O'Dwyer
University College Cork
Total Publications: 121
 
2
David McNulty
University College Cork
Total Publications: 20