Controlling dendrite propagation in solid-state batteries with engineered stress

What causes dendrite failure in lithium metal solid-state batteries?

Analysis of dendrite initiation, owing to filling of pores with lithium by means of microcracks, and propagation, caused by wedge opening, shows that there are two separate processes during dendrite failure of lithium metal solid-state batteries.

Can a stress-based approach mitigate metal-dendrite-induced failure in solid-state batteries?

We propose a stress-based approach to mitigating metal-dendrite-induced failure in solid-state batteries. Using experiments and a fracture mechanics model, we show that metal dendrites growing through solid electrolytes can be deflected by an imposed stress.

Can electrolytes inhibit dendrite propagation?

While most previous electrolyte engineering efforts focus on increasing the current density at which dendrites initiate, our findings suggest a new paradigm: that electrolytes can be engineered to inhibit dendrite propagation. Based upon this principle, we outline design approaches suitable for deflecting metal dendrites in solid-state batteries.

Can lithium metal dendrites be propagated through a solid electrolyte?

We observe the propagation of lithium metal dendrites through a model solid electrolyte, Li6.6 La 3 Zr 1.6 Ta 0.4 O 12 (LLZTO), under sequential and simultaneous electrochemical and mechanical stimulation.

Can metal dendrites be deflected in solid-state batteries?

Based upon this principle, we outline design approaches suitable for deflecting metal dendrites in solid-state batteries. Metal-dendrite penetration is a mode of electrolyte failure that threatens the viability of metal-anode-based solid-state batteries.

Can compressive stresses mitigate dendrite propagation in electrolyte samples?

Growing dendrites deflected toward the loading axis (Figures 4 C–4E), with the crack-plane oriented normal to the page (Figure 4 F). This result shows that compressive stresses may be used to mitigate dendrite propagation in electrolyte samples of similar thickness to those commonly studied in literature.