Cerium oxide nanorods anchored on carbon nanofibers derived from cellulose paper as effective interlayer for lithium sulfur battery
Cerium oxide nanorods anchored on carbon nanofibers derived from cellulose paper as effective interlayer for lithium sulfur battery
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DOI：
10.1016/j.jcis.2022.01.161
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发表时间：
2022-02-08
影响因子：
9.9
通讯作者：
Wang, Ruigang
中科院分区：
文献类型：
--
作者：
Azam, Sakibul;Wei, Zhen;Wang, Ruigang
研究硫锂电池的缓慢氧化还原动力学和多硫化物穿梭是设计先进硫锂电池的关键。氧化铈（CeO2）具有显著的多硫化物吸附能力，近年来在锂硫电池中得到了应用研究。为实现硫锂电池的商业化，采用水热法制备了CeO2纳米棒修饰的纤维素纸碳纤维，并将其作为硫锂电池的中间层材料。在这种新颖的设计中，碳纤维以其三维互连导电结构提供物理约束，CeO2通过化学方式吸附锂多硫化物，减少穿梭效应，从而实现锂硫电池的长寿命和高容量。当硫含量为2mg时，在0.2C温度下可获得1177 mAhg = 1的高容量，并且在300次循环中，每循环容量衰减仅为0.11%。这种性能的提高主要归功于CeO2对锂多硫化物的结合和致密导电碳纤维对多硫化物的物理阻隔。(c) 2022爱思唯尔公司版权所有。
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.