Lithium battery crystal penetration

Where does lithium metal penetration occur?

By far, the greatest amount of lithium metal penetration has occurred from location 1 at the edge of the gold working electrode. This condition was observed in all four of the electrodeposition cells that exhibited a short circuit.

Which brittle solid electrolyte is used in lithium electrodeposition experiments?

Lithium electrodeposition experiments were performed using single-crystal Li 6 La 3 ZrTaO 12 garnet as a model brittle solid electrolyte to investigate the factors that determine lithium metal penetration.

Does lithium short-circuit through solid electrolytes?

Lithium short-circuits through solid electrolytes occurs through a fundamentally different process than through liquid electrolytes. The onset of Li infiltration depends on solid-state electrolyte surface morphology, in particular the defect size and density.

How does lithium crystallization work?

In contrast to the conventional understanding, lithium crystallization takes multi-step pathways mediated by interfacial lithium atoms with disordered and random-closed-packed configurations as intermediate steps, which give rise to the energy barrier of crystallization.

Does lithium infiltration cause short circuits?

Lithium infiltration resulting in short circuits occurred on the minute time scale at current density of 10 mA/cm 2. The initiation of lithium metal filled cracks occurred predominantly at the perimeter of the working electrode, even when much larger (up to 0.4 mm), intentionally produced surface defects are present nearby.

What causes a short circuit in a lithium ion electrolyte?

These include the formation of an unstable solid-electrolyte interphase on the lithium metal that continuously depletes the electrolyte during cycling, and a susceptibility to short circuits due to dendrite formation through the liquid electrolyte at practical current densities (1–3 mA⋅cm −2 ). 7 – 9