Mujtaba, Jawayria

Mølhave, Kristian

Sun, Hongyu

Zhu, Jing

Online Research Database In Technology

                       General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.  • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal   If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.     Downloaded from orbit.dtu.dk on: Nov 08, 2017Chemically Modified Hierarchical Metal Oxide Nanostructures for Excellent LithiumStorageSun, Hongyu; Mujtaba, Jawayria ; Zhu, Jing ; Mølhave, KristianPublished in:Book of Abstracts. DTU's Sustain Conference 2015Publication date:2015Document VersionPublisher's PDF, also known as Version of recordLink back to DTU OrbitCitation (APA):Sun, H., Mujtaba, J., Zhu, J., & Mølhave, K. (2015). Chemically Modified Hierarchical Metal OxideNanostructures for Excellent Lithium Storage. In Book of Abstracts. DTU's Sustain Conference 2015 [M-13]Lyngby: Technical University of Denmark (DTU).   Chemically Modified Hierarchical Metal Oxide Nanostructures for Excellent Lithium Storage  Hongyu Sun1, 2, *, Jawayria Mujtaba 2, Jing Zhu 2, Kristian Mølhave 1, * 1: DTU Nanotech; 2: Beijing National Center for Electron Microscopy, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China  *Corresponding author email: hsun@nanotech.dtu.dk, Kristian.molhave@nanotech.dtu.dk   The overall performance of lithium-ion batteries (LIBs) is highly dependent on the inherent electrochemical properties of the electrode materials.1, 2 Specifically, three-dimensional complex hierarchical architectures assembled by low-dimensional nano-sized building blocks usually possess enhanced LIB performance.3, 4 Herein, by employing post chemical modification, we obtain novel hierarchical metal oxide nanostructures: crystalline@amorphous core/shell Co3O4 nanoparticles decorated ultrathin Co3O4 nanosheets; NiO nanowires decorated NiO nanosheets. The concentration of oxygen vacancies can be well controlled in the nanostructures, which is of importance because the conductivity can be tuned accordingly. The lithium storage properties of the chemically-modified hierarchical electrodes are found to be strongly correlated with oxygen vacancy concentration. It is believed that the excellent electrochemical performance can be attributed to the unique designed hierarchical nanostructures. The presented facile synthesis route can be applied to other metal oxides with desirable nanostructures, which provides a novel way to optimize their functions.     (a) Crystalline@amorphous core/shell Co3O4 nanoparticles decorated ultrathin Co3O4 nanosheets, (b) NiO nanowires (the white arrows) decorated NiO nanosheets 1. Goodenough, J. B. et al. A perspective on electrical energy storage. MRS Commun. 4, 135 (2014). 2. Goriparti, S. et al. Review on recent progress of nanostructured anode materials for Li-ion batteries. J. Power Sources 257, 421 (2014). 3. Sun, Y.-K. et al. Nanostructured high-energy cathode materials for advanced lithium batteries. Nat. Mater. 11, 942 (2012). 4. Magasinki, A. et al. High-performance lithium-ion anodes using a hierarchical bottom-up approach. Nat. Mater. 9, 353 (2010). Sustain DTU Abstract: M-13

Chemically Modified Hierarchical Metal Oxide Nanostructures for Excellent Lithium Storage

http://orbit.dtu.dk/ws/files/119754867/M13_DTU_Sustain_2015.pdf

Chemically Modified Hierarchical Metal Oxide Nanostructures for Excellent Lithium Storage

Abstract

Similar works

Full text

Available Versions

Online Research Database In Technology