Please use this identifier to cite or link to this item: https://apo.ansto.gov.au/dspace/handle/10238/11625
Title: New electrode materials for lithium- and sodium-ion batteries
Authors: Xia, Q
Ling, CD
Wang, C
Avdeev, M
Keywords: Electrochemistry
Electric batteries
Lithium ion batteries
Neutron diffraction
Magnetic properties
Phase transformations
Issue Date: 3-Dec-2017
Publisher: Society of Crystallographers in Australia and New Zealand
Citation: Xia, Q., Ling, C. D., Wang, C., & Avdeev, M. (2017). New electrode materials for lithium- and sodium-ion batteries. Paper presented at CRYSTAL 31, the 31st Biennial Conference of the Society of Crystallographers in Australia and New Zealand, Pullman Bunker Bay, Western Australia, 3 – 7 December 2017. Retrived from: https://crystal31.com/wp-content/uploads/2017/11/SCANZ-Crystal-31-2017-Book-of-Abstracts-FINAL.pdf#page=56
Abstract: As a result of increased energy demand, energy storage has become a growing global concern over the past decade. Electrochemical energy storage (EES) technologies based on batteries are beginning to show considerable promise as a result of many breakthroughs in the last few years due to their appealing features including high round-trip efficiency, flexible power, energy characteristics to meet different grid functions, long cycle life, and low maintenance [1, 2]. My project focuses on the discovery, characterisation and optimisation of electrode and solid electrolyte materials in both lithium-ion batteries and sodium-ion batteries, in which the investigation of nuclear materials and magnetic structures and the dynamics of Li/Na ion are key issues. In this presentation three techniques below that have been heavily utilised to theoretically and experimentally characterise new electrode materials will be systematically discussed. 1. Ab initio calculation—It is employed to identify and compare the energies of framework structures with hosting Li/Na from materials data mining, which give an improved understanding of how the experimentally determined structures arise and how they will evolve with mobile ion concentration under electrochemical cycling. Knowledge of the ground-state magnetic structure also permits the accurate calculation of redox potentials, in conjunction with electrochemical measurements. 2. Neutron scattering—It concerns new crystalline materials for light metal-ion batteries in several ways. Neutron diffraction reveals the location and occupancies of Li/Na sites in the crystal lattice and, hence, conduction pathways. In situ experiments explicitly reveal Li/Na ion mobility, as well as phase changes under operating conditions that undermine long-term stability. Inelastic and quasielastic neutron scattering probe the dynamics of the mobile ions and the supporting lattice. Besides, low temperature neutron diffraction reveals the spin-ordered ground states of the transition metal countercations, which are not only fundamentally fascinating due to their complex super-super-exchange pathways, but also characteristic of their electrochemical states in batteries. 3. In-situ TEM characterisation—It is performed to study how materials degrade on a larger scale over repeated cycling: nanocrystallisation, and changes in the roughness of the interfaces. The information of the materials failure collected by virtue of this technique will help to effectively design accurate ways to optimise the materials.
URI: https://crystal31.com/wp-content/uploads/2017/11/SCANZ-Crystal-31-2017-Book-of-Abstracts-FINAL.pdf#page=56
https://apo.ansto.gov.au/dspace/handle/10238/11625
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