Eliminating Graphite Exfoliation with an Artificial Solid Electrolyte Interphase for Stable Lithium‐Ion Batteries. Issue 15 (27th February 2022)

• Record Type: Journal Article
• Authors: Zhou, Junhua; Ma, Keni; Lian, Xueyu; Shi, Qitao; Wang, Jiaqi; Chen, Zhujie; Guo, Lingli; Liu, Yu; Bachmatiuk, Alicja; Sun, Jingyu; Yang, Ruizhi; Choi, Jin‐Ho; Rümmeli, Mark H.
• Is Part Of: Small. Volume 18:Issue 15(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-02-27
• Subjects: artificial solid electrolyte interphase (SEI) -- graphite anodes -- graphite exfoliation; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.202107460
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: Although graphite materials with desirable comprehensive properties dominate the anode market of commercial lithium‐ion batteries (LIBs), their low capacity during fast charging precludes further commercialization. In the present work, natural graphite (G) is reported not only to suffer from low capacity during fast charging, but also from charge failure after many charging cycles. Using different characterization techniques, severe graphite exfoliation, and continuously increasing solid electrolyte interphase (SEI) are demonstrated as reasons for the failure of G samples. An ultrathin artificial SEI is proposed, addressing these problems effectively and ensuring extremely stable operation of the graphite anode, with a capacity retention of ≈97.5% after 400 cycles at 1 C. Such an artificial SEI modification strategy provides a universal approach to tailoring and designing better anode materials for next‐generation LIBs with high energy densities. Abstract : The authors design an artificial solid electrolyte interphase (SEI), which can solve problems regarding graphite exfoliation and continuously increased SEI effectively, ensuring the extremely stable operation of graphite anode, with capacity retention of around 97.5% after 400 cycles at 1 C.