ORAL

SESSION: EnergyMonAM-R2	Dodds International Symposium on Sustainable Energy Production (4th Intl. Symp. on Sustainable Energy Production: Fossil; Renewables; Nuclear; Waste handling , processing, and storage for all energy production technologies; Energy conservation)
Mon Oct, 23 2017	Room: Peninsula 3
Session Chairs: Wesley Williams; Martin Mansson; Session Monitor: TBA

12:00: [EnergyMonAM03] Keynote
Towards Green and Safe Sodium Batteries
Martin Mansson¹ ; Ola Kenji Forslund¹ ; ¹KTH Royal Institute of Technology, Kista Stockholm, Sweden;
Paper Id: 257 [Abstract]

While Li-ion batteries are considered the main candidate for mobile energy storage applications, compounds based on lithium's heavier cousin, sodium (Na) have recently started to receive a lot of attention. One reason is that our Li-reserves are limited and to realize future electric vehicles we might have to reconsider the Li-ion technology. Na has indeed many advantages over Li e.g. Na is one of the most abundant elements in nature (earth's crust as well as in normal seawater of our great oceans), which makes it about 5 times cheaper than Li. Further, Na-ion batteries can also be much less toxic and easier to recycle. In many ways the NaxCoO2 compound is a Na-analog of the most common Li-ion battery electrode material LixCoO2. Hence, understanding Na-ion diffusion mechanisms in NaxCoO2 would seem a logical first step. In this talk I will show that neutron scattering is a crucial technique for the understanding of these materials. I will also summarize our recent results that reveal how the ion-diffusion process is intrinsically linked to a series of subtle structural transitions along with novel and functional possibilities for tuning battery performance using lattice-strains.

SESSION: SISAMMonAM-R9	3rd Intl. Symp. Surfaces and Interfaces of Sustainable, Advanced Materials (SISAM)
Mon Oct, 23 2017	Room: Condesa III
Session Chairs: Jean-Marie Dubois; Isabelle Braems; Session Monitor: TBA

12:00: [SISAMMonAM03]
Muons as an Optimal Probe for Future All Solid-State Energy Devices: A Brief Introduction and Review
Ola Kenji Forslund¹ ; Martin Mansson¹ ; ¹KTH Royal Institute of Technology, Kista Stockholm, Sweden;
Paper Id: 342 [Abstract]

To ensure the general breakthrough of electrical vehicles in our modern society it is highly desirable to improve performance, safety and lifetime of current batteries, fuel cells and hydrogen storage systems. It is commonly thought that such improvements are found within the so-called all-solid-state energy devices. To accomplish a paradigm shift within this field a new generation of energy materials needs to be developed. Further, a better understanding of how surface and interface effects are potentially affecting intrinsic material properties is clearly needed. Muon spin rotation and relaxation (mu+SR) is a hidden gem among the available experimental techniques. Its extreme sensitivity to static and dynamic electronic as well as nuclear fields makes it ideal to study especially ion dynamics in solid energy materials. It is also one of the very few techniques that is able to acquire non-destructive depth profiling of ion diffusion across an interface. In this presentation I will briefly outline the working principle of this unique method and show its capabilities through our recent results from studies of batteries as well as hydrogen storage materials.