Materials Innovation for Next-Generation Batteries Corsin Battaglia - PowerPoint PPT Presentation

Willkommen Welcome Bienvenue Materials Innovation for Next-Generation Batteries Corsin Battaglia SCCER HaE Annual Symposium 2018

SCCER Heat and Electricity Storage www.sccer-hae.ch

Next-generation lithium-ion batteries Cathode Anode Team Battaglia Empa Team Kovalenko ETH/Empa State-of-the-art: 220 Wh/kg SCCER target: 275 Wh/kg

Energy density on cell level Panasonic NCR18650B LG INR MJ1 Samsung SDI INR 35E Charge 0.5 C Discharge 1.0 C Temperature 25°C Remaining capacity 70% DOD 0%-100%, 500 cycles DOD 6%-94%, 7’500 cycles DOD 8%-92%, 15’000 cycles DOD 10%-90%, 28’000 cycles DOD 20%-80%, 35’000 cycles http://blog.evandmore.com/lets-talk-about-the-panasonic-ncr18650b/ 70% after 500 cycles 90% after 180 cycles last 10% capacity during 70 min

How to reach 220 Wh/kg? 30 Wh/kg  Automated co-precipitation reactor Synthesis  Shape controlled synthesis  Validation with NMC111

How to reach 220 Wh/kg? 150 Wh/kg  Automated co-precipitation reactor Synthesis  Shape controlled synthesis  Validation with NMC111  Slurry formulation Coating  Tape casting  Drying and calendering

How to reach 220 Wh/kg? 220 Wh/kg  Automated co-precipitation reactor Synthesis  Shape controlled synthesis  Validation with NMC111  Slurry formulation Stacking Coating  Tape casting  Stacking  Drying and calendering Team Fürst BFH

How to go beyond 220 Wh/kg? 275 Wh/kg  Increase nickel content Synthesis  Reduce cobalt content  Gain in energy density & cost reduction  Sacrificial electrolyte additives Electrolyte  91% capacity retention after 200 cycles  Still suffer from impedance growth Vidal Laveda et al. in preparation

Non-flammable electrolytes  Stability window of water 1.23 V  High salt concentration to reach 2.6 V  77% capacity retention after 500 cycles Kühnel et al. Chem. Comm. 2016 Kühnel et al. ACS Energy Express 2017 Reber et al. ACS Sust. Energy Fuels 2017 Reber et al. submitted

Non-flammable electrolytes  Stability window of water 1.23 V  High salt concentration to reach 2.6 V  77% capacity retention after 500 cycles Kühnel et al. Chem. Comm. 2016 Kühnel et al. ACS Energy Express 2017 Reber et al. ACS Sust. Energy Fuels 2017 Reber et al. submitted

Non-flammable electrolytes  Stability window of water 1.23 V  High salt concentration to reach 2.6 V  77% capacity retention after 500 cycles Kühnel et al. Chem. Comm. 2016 Kühnel et al. ACS Energy Express 2017 Reber et al. ACS Sust. Energy Fuels 2017 Reber et al. submitted

Solid-state electrolytes 2- B 12 H 12 2- B 10 H 10 Na +  Closoborate salts  Suppression of transition by 1:1 anion mixing  Thermally stable up to at least 300 °C  ~1 mS/cm at room temperature Duchêne et al. Chem. Comm. 2017 Yan et al. Adv. Energy Mater. 2017 Roedern et al. Sci. Reports 2017 SNF Sinergia w/ UniGe & PSI

Solid-state electrolytes 3.0 V plating  3 V stability window  Compatible with sodium metal anode  Low overpotential for sodium plating/stripping Duchêne et al. Energy and Environ. Sci. 2017 Patent application submitted SNF Sinergia w/ UniGe & PSI

Solid-state electrolytes 3.0 V plating  3 V stability window  Compatible with sodium metal anode  Low overpotential for sodium plating/stripping  Candidate cathode material NaCrO 2 Duchêne et al. Energy and Environ. Sci. 2017  85% capacity retention after 250 cycles Patent application submitted SNF Sinergia w/ UniGe & PSI

From lab to market N a N i C l 4 L i - I o n 3 N a - I o n A l l - S o l i d - S t a t e 2 1 Several postdoc positions T R L to open soon Lab members, FZSonick, SNSF, BFE Contact SCCER & Sinergia partners CTI, InnoSuisse corsin.battaglia@empa.ch