Functional and structural insight into lignocellulosic fibers for high-areal-capacity lithium-sulfur batteries
- Yun, Jong Hyuk; Kim, Joo-Hyung; Ragupathy, Pitchai; Kim, Dong Jun; Kim, Do Kyung
- Issue Date
- ROYAL SOC CHEMISTRY
- JOURNAL OF MATERIALS CHEMISTRY A, v.9, no.34, pp.18260 - 18271
- Journal Title
- JOURNAL OF MATERIALS CHEMISTRY A
- Start Page
- End Page
- Hemp-fibers have a long history as a source of making paper, ropes, and canvas. Recently, due to their superior mechanical strength with biodegradability, hemp-fibers are resurfacing as an environmentally friendly engineering material. Meanwhile, lithium-sulfur batteries are receiving substantial attention for the next-generation rechargeable batteries, owing to their high energy density combined with the natural abundance of sulfur. Despite these advantages, sulfur active materials still encompass a number of challenges for practical applications, such as intrinsically low electrical conductivity, dissolution in the electrolyte and limited areal loading. By utilizing hemp-fibers as a scaffold for the sulfur active material, herein we report the fabrication of a hybrid porous carbon architecture that mimics the resource acquisition and transport system of vascular plants. The hemp fiber-derived hybrid electrodes show an exceptionally high sulfur loading of 15.36 mg cm(-2) and display a high areal capacity of 14.8 mA h cm(-2) at 0.1C current rate. We also demonstrate the feasibility of the practical application by fabricating large-area pouch-cells. Furthermore, our operando Raman and X-ray photoelectron spectroscopy studies have revealed the chemisorption mechanism of the hemp hybrid electrode with lithium polysulfide, which enables long cycle life.
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- 공학계열 > Dept.of Materials Engineering and Convergence Technology > Journal Articles
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