Efficient Polysulfides Conversion Kinetics Enabled by Ni@CNF Interlayer for Lithium Sulfur Batteries
Rakhimbek I. Baikalov N. Konarov A. Mentbayeva A. Zhang Y. Mansurov Z. Wakihara M. Bakenov Z.
20 November 2023Institute of Combustion Problems, al-Farabi Kazakh State National University
Eurasian Chemico-Technological Journal
2023#25Issue 3147 - 156 pp.
Recent advances in the development of lithium-sulfur batteries (Li-S) demonstrated their high effectiveness owing to their tremendous theoretical specific capacity and high theoretical gravimetrical energy. Nevertheless, the potential commercialization of Li-S is significantly held by the insulating nature of sulfur and complicated RedOx reactions during the electrochemical charge-discharge processes. This paper presents nickel nanoparticles embedded carbon nanofibers interlayer (Ni@CNF) between a cathode and a separator as an additional physical barrier against lithium polysulfides shuttle for their efficient conversion during the charge-discharge cycling. Furthermore, the interlayer provides an auxiliary electron pathway with subsequent lowering of the charge transfer resistance. The electrochemical analysis of a Li-S cell with the Ni@CNF interlayer demonstrated high initial discharge capacities of 1441.2 mAh g-1 and 1194.2 mAh g-1 at 0.1 and 1.0 C rates, respectively, with remarkable capacity retention of ~83% after 100 cycles. This study revealed the advantageous impact of Ni@CNF towards solving the major issues of lithium-sulfur batteries, i.e., sluggish kinetics and the shuttle effect.
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National Laboratory Astana, Nazarbayev University, 53, Kabanbay batyr ave, Astana, Kazakhstan
Department of Chemical and Materials Engineering, Nazarbayev University, 53, Kabanbay batyr Ave, Astana, Kazakhstan
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, No. 457 Zhongshan Road, Liaoning, Dalian, 116023, China
Institute of Combustion Problems, 172 Bogenbay Batyr str, Almaty, Kazakhstan
Tokyo Institute of Technology, T2 Chome-12-1 Ookayama, Tokyo, Meguro City, 152-8550, Japan
National Laboratory Astana
Department of Chemical and Materials Engineering
Dalian Institute of Chemical Physics
Institute of Combustion Problems
Tokyo Institute of Technology
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