ALL SOLID-STATE BATTERIES

  • Broader Impact

All-solid-state batteries (SSBs) are promising next-generation batteries for their improved safety and energy density. However, limited cycle life hinders the practical applications of SSBs. Many factors are involved in the degradation of SSBs during cycling, including the growth of dendrites from anodes through the solid electrolyte, and microstructural degradation of the composite cathode. Developing new theoretical methods are critical for understanding the mechanisms of these physical problems and accelerating the material/structure design in SSBs.

  • Potential Award/Funding Source

1. DOE - Office of Energy Efficiency & Renewable Energy (EERE) 

2. Berkeley National Lab - Laboratory-Directed Research and Development (LDRD) 2020

3. Samsung Advanced Institute of Technology

  • Project 1: Electro-Chemo-Mechanics for Dendrite Growth at Li-Metal Anode/Solid Electrolyte Interface 

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[1]. Tu, Qingsong, et al. "Electrodeposition and Mechanical Stability at Lithium-Solid Electrolyte Interface during Plating in Solid-State Batteries." Cell Reports Physical Science (2020): 100106. [PDF]

[2]. Tu, Qingsong, et al. "Effect of creep and plastic flow of metal on the dendrite growth in the solid electrolyte in solid-state battery." Under scripting

[3]. Barroso-Luque, Luis, Qingsong Tu, and Gerbrand Ceder. "An analysis of solid-state electrodeposition-induced metal plastic flow and predictions of stress states in solid ionic conductor defects." Journal of The Electrochemical Society 167.2 (2020): 020534. [PDF]

  • Project 2: Microstructure Optimization of Composite Cathode in Solid-State Battery 

§. Growth of primary NMC particle

§. In-situ compression test on primary NMC particle

§. Clustering of secondary          NMC particle 

§. Volume expansion of            secondary NMC particle

§. Disassembling on secondary                    NMC particle into primary particles

§. In-situ compression test on secondary NMC particle (experiments & simulation)

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[1]. Patent: Tu, Qingsong, et al. "SOLID-STATE POSITIVE ELECTRODE, METHOD OF MANUFACTURE THEREOF, AND BATTERY INCLUDING THE ELECTRODE." U.S. Patent Application No. 16/459,896. [PDF]

[2]. Patent: Tu, Qingsong, et al. "CATHODE PACKING FOR BIMODAL DISTRIBUTION OF ACTIVE MATERIAL." U.S. Patent Application, Filed.

[3]. Tan Shi*, Qingsong Tu* (Co-first), et al. "High Active Material Loading in All‐Solid‐State Battery Electrode via Particle Size Optimization." Advanced Energy Materials 10.1 (2020): 1902881. [PDF]

[4]. Srinath, Qingsong Tu, et al. "Bi-modal NMC particles" In preparation

  • Project 3: Degradation of Solid Electrolyte due to Cycling of Solid-State Battery  

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[1]. Tu, Qingsong, et al. "Understanding Metal Propagation in Solid Electrolytes due to Mixed Ionic–Electronic Conduction." In preparation.