Controlling dendrite propagation in solid-state batteries with engineered stress

A continuum electro-chemo-mechanical gradient theory coupled with damage: Application to Li-metal filament growth in all-solid-state batteries

“…Only upon fracture of the solid conductor, and subsequent creation of an empty deposition site, may Li-metal filaments proceed to grow by plating the newly fractured space. Recent work by Fincher et al [56] experimentally demonstrates this phenomenon. There, the authors apply an external, experimentally controlled stress field on a solid-state electrolyte through which a Li-filament is growing.…”

“…This interpretation conforms with experimental observations that for metal deposits to grow through a solid host, they must first overcome mechanical resistance by fracturing the solid to create the necessary vacant space to accommodate plating (c.f. Fincher et al [56] and Ren et al [76]).…”

State-of-the-Art of Solid-State Electrolytes on the Road Map of Solid-State Lithium Metal Batteries for E-Mobility

“…Recently researchers at MIT have identified solutions for dendrite formation using simple pressure from the perpendicular direction to the cell assembly which deflects the dendrites into a filament and hinders propagating into the cathode direction. Engineering solutions such as this are simple but scalable …”

“…Engineering solutions such as this are simple but scalable. 122 ■ APPROACHES TO SUPPRESS LITHIUM DENDRITES PENETRATION Similar to the conventional organic liquid electrolytes and separators, the main roles of SSE in a cell are to only permit lithium ions to be transferred between anode and cathode and to prevent electron conduction and short circuit. 3 The specifications of the next-generation SSE are that it must be safe and ecofriendly as well as having a higher ionic conductivity of above 10 −4 −10 −3 S cm −1 at ambient temperature, negligible electronic conductivity with a high lithium ion transference number, wide electrochemical stability windows up to 5.0 V, excellent mechanical properties and flexibility, outstanding thermal and chemical stability, and simple manufacturing processes.…”

Defect-rich Mo2S3 loaded wood-derived carbon acts as a spacer in lithium–sulfur batteries: forming a polysulfide capture net and promoting fast lithium flux

“…18 Moreover, the large pore structure is conducive to releasing the stress caused by volume change and alleviating the rapid growth of lithium dendrites caused by local stress concentration. 19 The uniform distribution of electric fields in the channels can induce transverse growth of the formed lithium dendrites without causing short circuits. 20 By further depositing graphene oxide (GO) on the positive side of the spacer, conductivity at the interface was further improved.…”