Electrometallurgy 2020: Applications to Battery or Materials Synthesis
Sponsored by: TMS Extraction and Processing Division, TMS: Hydrometallurgy and Electrometallurgy Committee, TMS: Process Technology and Modeling Committee, TMS: Pyrometallurgy Committee
Program Organizers: Antoine Allanore, Massachusetts Institute of Technology; Michael Free, University of Utah; Georges Houlachi, Hydro-Quebec; Hojong Kim, Pennsylvania State University; Takanari Ouchi, University of Tokyo; Shijie Wang, Coeur Mining, Inc
Tuesday 8:30 AM
February 25, 2020
Room: 14A
Location: San Diego Convention Ctr
Session Chair: Hojong Kim, Pennsylvania State University
8:30 AM Cancelled
A Low-cost Intermediate Temperature Molten Salt Battery for Grid-scale Energy Storage: Xiaohui Ning1; 1Xi'an Jiao Tong University
The lack of low-cost and dense energy storage systems critically limits the deployment of renewable energies. We developed an intermediate temperature molten-salt battery that emphatically resolves this issue by using all earth-abundant elements. Operated at 170 degrees celsius, the cell comprises of a Fe metal anode, NaCl saturated NaAlCl4 electrolyte and an AlCl4- intercalated graphite cathode in the fully charged state. It has a capacity retention of 85% after nearly 10,000 cycles. After characterizing the anode, it was determined that the high reversibility of the Fe to FeCl2 solid state transformation are responsible for the absence of dendritic growth on such a metal anode. Different electrode capacity matching strategies were discussed in the context of ensuring safe operation during overcharging. Finally, the overall material cost of the Fe/Graphite cell was estimated to be 33.9 $ kWh-1, which can potentially meet the demands of the commercial energy storage market.
8:50 AM Cancelled
High-performance Composite Electrolyte Enhanced by Solid Plasticizer and Conductive Ceramic Filler for All-Solid-State Lithium Battery: Fei Chen1; 1Wuhan University of Technology
The scalable composite solid electrolyte with high ionic conductivity, wide electrochemical stable window and good compatibility with electrodes is demonstrated as a promising candidate for high performance all-solid-state batteries (ASSLBs). In this work, the composite electrolytes composed of Li7La3Zr2O12, poly (ethylene oxide), lithium bis (trifluoromethane) sulfonimide, and solid plasticizer succinonitrile are fabricated via conventional solution-casting technique and their electrochemical characteristics are systematically investigated. Among these electrolytes, the sample containing 7.5 wt.% and 60 wt.% Li7La3Zr2O12 and 10 wt.% succinonitrile possess the maximum conductivities and good electrochemical stability of 5.5 V vs. Li/Li+. Owing to the improved interface contact and enhanced Li+ transference, ASSLBs with both two composite electrolytes present outstanding cycling and rate performance at 60 °C. Meanwhile, they can also be successfully applied to ASSLBs at lower temperature (30 °C and 45 °C) while still delivering a relatively high specific capacity.
9:10 AM
Study on High-temperature Liquid Lithium Battery with LiI-KI Electrolyte: Hao Yu1; Huimin Lu1; Neale Neelameggham2; 1Beihang University; 2IND LLC
High-temperature liquid metal lithium batteries have always occupied a very important position in the field of energy storage. It has high energy storage efficiency and long life. However, high operating temperatures and low safety have been factors that have plagued the development of liquid metal lithium batteries. Here，we report a new chemistry of LiI-KI electrolyte and Bi-Sn positive electrode to lower the operation temperature of Li-based LMBs and achieve the long-term stability. We show that the assembled Li|| LiI-KI || Bi–Sn can stably cycle at an intermediate temperature less than 300 °C at current densities of 50 mA/cm-2 to 200 mA/cm−2 respectively with almost no capacity decay, and an average Coulombic efficiency of 97~98%. Our design provides new ideas for the development of energy storage.