期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 615, 期 -, 页码 417-431出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2022.01.161
关键词
Lithium sulfur batteries; Lithium polysulfides; Shuttle effect; Interlayer; Cerium oxide
资金
- National Science Foundation [CBET-2118784, IIP-2147564]
- Alabama Transportation Institute
In this study, cellulose paper-derived carbon fiber decorated with CeO2 nanorods was fabricated and used as an interlayer material for lithium sulfur battery. The binding of lithium polysulfides by CeO2 and the physical blocking effect of conducting carbon fiber contributed to the improved performance of the battery in terms of cycle life and capacity.
Investigation of sluggish redox kinetics and polysulfide shuttling is crucial to design advanced lithium sulfur battery. Cerium oxide (CeO2) has remarkable polysulfide adsorption capability and has been recently investigated in lithium sulfur battery application. With the goal of bridging towards commercialization of lithium sulfur battery, cellulose paper derived carbon fiber decorated with CeO2 nanorods using hydrothermal method has been fabricated and used as interlayer material for lithium sulfur battery. In this novel design, the carbon fiber provides physical confinement with its 3-D interconnected conductive structure and CeO2 adsorbs lithium polysulfides chemically to reduce shuttle effect to achieve long lifetime and high capacity for lithium sulfur battery. With a sulfur content of 2 mg, a high capacity of 1177 mAhg = 1 was achieved at 0.2C with an excellent stability of only 0.11% capacity decay per cycle over 300 cycles. The improved performance is attributed to the binding of lithium polysulfides by CeO2 and the blocking of polysulfides physically by the compact conducting carbon fiber. (c) 2022 Elsevier Inc. All rights reserved.
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