TY - JOUR
T1 - Elucidating Polymer Binder Entanglement in Freestanding Sulfide Solid-State Electrolyte Membranes
AU - Mills, Anna
AU - Kalnaus, Sergiy
AU - Tsai, Wan Yu
AU - Su, Yi Feng
AU - Williams, Ella
AU - Zheng, Xueli
AU - Vaidyanathan, Swetha
AU - Hallinan, Daniel T.
AU - Nanda, Jagjit
AU - Yang, Guang
N1 - Publisher Copyright:
© 2024 American Chemical Society.
PY - 2024/6/14
Y1 - 2024/6/14
N2 - This study advances the development of flexible, sheet-type sulfide solid-state electrolytes (SSEs) for use in all-solid-state batteries, emphasizing the important and previously insufficiently investigated role of polymer binder entanglement. The molecular weight of polymer binders is pivotal in crafting robust, freestanding SSE films. Our research uncovers a dual impact: higher molecular weight binders bolster the structural integrity of SSE films but elevate grain boundary resistance and diminish critical current density, whereas lower molecular weight poly(isobutylene) films, despite their more uniform distribution, lack the essential strain hardening or strength for sustained active material contact. Crucially, full cells employing higher molecular weight binders demonstrate improved discharge capacity retention, contrasting sharply with the notable capacity degradation in lower molecular weight cells. Our findings not only deepen the comprehension of binder influences in solid-state batteries but also chart a course for refining all-solid-state battery technologies, a key stride for the future of energy storage solutions.
AB - This study advances the development of flexible, sheet-type sulfide solid-state electrolytes (SSEs) for use in all-solid-state batteries, emphasizing the important and previously insufficiently investigated role of polymer binder entanglement. The molecular weight of polymer binders is pivotal in crafting robust, freestanding SSE films. Our research uncovers a dual impact: higher molecular weight binders bolster the structural integrity of SSE films but elevate grain boundary resistance and diminish critical current density, whereas lower molecular weight poly(isobutylene) films, despite their more uniform distribution, lack the essential strain hardening or strength for sustained active material contact. Crucially, full cells employing higher molecular weight binders demonstrate improved discharge capacity retention, contrasting sharply with the notable capacity degradation in lower molecular weight cells. Our findings not only deepen the comprehension of binder influences in solid-state batteries but also chart a course for refining all-solid-state battery technologies, a key stride for the future of energy storage solutions.
UR - http://www.scopus.com/inward/record.url?scp=85192823464&partnerID=8YFLogxK
U2 - 10.1021/acsenergylett.3c02813
DO - 10.1021/acsenergylett.3c02813
M3 - Article
AN - SCOPUS:85192823464
SN - 2380-8195
VL - 9
SP - 2677
EP - 2684
JO - ACS Energy Letters
JF - ACS Energy Letters
IS - 6
ER -