Université de Fribourg

In situ deprotection of polymeric binders for solution‐processible sulfide‐based all‐solid‐state batteries

Lee, Jieun ; Lee, Kyulin ; Lee, Taegeun ; Kim, Hyuntae ; Kim, Kyungsu ; Cho, Woosuk ; Coskun, Ali ; Char, Kookheon ; Choi, Jang Wook

In: Advanced Materials, 2020, p. 2001702

Sulfide‐based all‐solid‐state batteries (ASSBs) have been featured as promising alternatives to the current lithium‐ion batteries (LIBs) mainly owing to their superior safety. Nevertheless, a solution‐based scalable manufacturing scheme has not yet been established because of the incompatible polarity of the binder, solvent, and sulfide electrolyte during slurry preparation. This...

Université de Fribourg

A pyrene–poly(acrylic acid)–polyrotaxane supramolecular binder network for high-performance silicon negative electrodes

Cho, Yunshik ; Kim, Jaemin ; Elabd, Ahmed ; Choi, Sunghun ; Park, Kiho ; Kwon, Tae‐woo ; Lee, Jungmin ; Char, Kookheon ; Coskun, Ali ; Choi, Jang Wook

In: Advanced Materials, 2019, p. 1905048

Although being incorporated in commercial lithium‐ion batteries for a while, the weight portion of silicon monoxide (SiOx, x ≈ 1) is only less than 10 wt% due to the insufficient cycle life. Along this line, polymeric binders that can assist in maintaining the mechanical integrity and interfacial stability of SiOx electrodes are desired to realize higher contents of SiOx. Herein, a...

Université de Fribourg

Highly elastic polyrotaxane binders for mechanically stable lithium hosts in lithium‐metal batteries

Yoo, Dong‐Joo ; Elabd, Ahmed ; Choi, Sunghun ; Cho, Yunshik ; Kim, Jaemin ; Lee, Seung Jong ; Choi, Seung Ho ; Kwon, Tae‐woo ; Char, Kookheon ; Kim, Ki Jae ; Coskun, Ali ; Choi, Jang Wook

In: Advanced Materials, 2019, vol. 31, no. 29, p. 1901645

Despite their unparalleled theoretical capacity, lithium‐metal anodes suffer from well‐ known indiscriminate dendrite growth and parasitic surface reactions. Conductive scaffolds with lithium uptake capacity are recently highlighted as promising lithium hosts, and carbon nanotubes (CNTs) are an ideal candidate for this purpose because of their capability of percolating a conductive...