ORALS

SESSION: BatteryMonAM-R9	5th Intl. Symp. on Sustainable Secondary Battery Manufacturing and Recycling
Mon Nov, 5 2018 / Room: Asian (60/3rd)
Session Chairs: Vasant Kumar; Miles Freeman; Session Monitor: TBA

11:45: [BatteryMonAM02] Keynote
Preparation of High-Performance Cathode and Anode Materials for Sodium-Ion Batteries and Investigating the Reaction Mechanism
Ghulam Ali¹ ; Ji Young Kim¹ ; Hee-dae Lim¹ ; Kyung Yoon Chung¹ ; ¹Korea Institute of Science and Technology (KIST), Seoul, South Korea;
Paper Id: 389 [Abstract]

The demand for energy storage systems (ESS) has increased tremendously in the last decade due to their use in a variety of applications ranging from mid- to large-scale. The most important factors in the development of ESS include high-performance and cost-effective systems. At present, lithium-ion batteries (LIBs) are being used as storage devices but their application is limited to small- to medium-scale. The main reasons to not use LIBs at large-scale are high production cost and limited lithium resources. While searching for alternatives, sodium-ion batteries (SIBs) have emerged as a potential candidate for the use of ESS, which is considered cost-effective and also share similar electrochemical principle to LIBs. However, high-performance cathode and anode materials are urgently required for the commercialization of SIBs.
In the search of high-performance electrode materials, we have prepared several cathode and anode materials for SIBs. I will briefly discuss the preparation and electrochemical properties of the high-performance cathode materials, which include FeF₃.0.5H₂O and olivine-type NaFePO₄, and also discuss the investigated reaction mechanism. The nanocomposite of FeF₃.0.5H₂O and reduced graphene oxide has shown high sodium storage performance where it delivers a capacity of 266 mAh g^-1 while NaFePO₄ has shown excellent cyclability with a capacity retention of 94% after 100 cycles. Further, alloying-based SnF₂ anode material was prepared and the electrochemical properties, as well as reaction mechanism, were systematically investigated. The nanocomposite of SnF₂ and acetylene black has shown promising electrochemical performance where it delivers a high capacity of 563 mAh g^-1. In-situ XRD and synchrotron-based X-ray absorption spectroscopy (XAS) were used to investigate the reaction mechanism of the above-mentioned materials. The details of the investigated reaction mechanism will be discussed in my presentation.

References:
[1] Ali, G., S. H. Oh, S. Y. Kim, J. Y. Kim, B. W. Cho and K. Y. Chung, Journal of Materials Chemistry A 3(19): 10258-10266 (2015)\n[2] Ali, G., J. H. Lee, D. Susanto, S. W. Choi, B. W. Cho, K. W. Nam and K. Y. Chung, ACS Applied Materials & Interfaces 8(24): 15422-15429 (2016).\n[3] Ali, G., J. H. Lee, S. H. Oh, H. G. Jung and K. Y. Chung, Nano Energy 42: 106-114 (2017).

SESSION: BatteryTueAM-R9	5th Intl. Symp. on Sustainable Secondary Battery Manufacturing and Recycling
Tue Nov, 6 2018 / Room: Asian (60/3rd)
Session Chairs: TBA Session Monitor: TBA

11:20: [BatteryTueAM01] Invited
Novel Electrode Materials as Anodes for High-Performance Na-ion Batteries
Ghulam Ali¹ ; ¹Korea Institute of Science and Technology (KIST), Seoul, South Korea;
Paper Id: 157 [Abstract]

There is a need to develop cost-efficient and high-performance large-scale batteries for intermittent energy sources. In this regard, sodium-ion batteries (SIBs) have emerged as a potential candidate for the use of electrical energy storage systems (ESS), which share similar electrochemical principles to the comparatively high-cost lithium-ion batteries (LIBs). However, high-performance electrode materials are required for the realization of SIBs. In this presentation, the development of anode materials for SIBs will be discussed. Our group has contributed to a variety of materials such as carbonaceous, intercalation-based metal oxides, conversion-based metal oxides, and alloying materials as anodes for SIBs. The results show that novel carbon-based anodes possess the capability of high energy and power density. The intercalation-based anodes such as TiO2 have also shown good stability over long cycling, thus demonstrating the suitability as anodes for SIBs. Conversion-based metal oxides also show promising electrochemical properties when used as a full sodium-ion cell. Finally, the nano-sized alloying-based SnF2 material was tested as anodes, and the electrochemical results, as well as the reaction mechanism of the material using synchrotron-based X-ray absorption spectroscopy, are measured. All of the above will be discussed in detail during the talk.