Guo Xincheng, Wan Pengfei, Xia Peng, Jin Xuanyang, Lu Shengjun, Zhang Yufei, Fan Haosen
College of Materials Science and Metallurgy Engineering, Guizhou University, Guiyang 550025, China.
College of Materials Science and Metallurgy Engineering, Guizhou University, Guiyang 550025, China; School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China.
J Colloid Interface Sci. 2025 Jan 15;678(Pt A):393-406. doi: 10.1016/j.jcis.2024.08.176. Epub 2024 Aug 24.
With the rapid development of large-scale clean energy, lithium-sulfur (Li-S) batteries are considered to be one of the most promising energy storage devices. In this manuscript, the polymetallic hetero-nanocrystal of iron nickel@cobalt nitride encapsulating into boron carbonitride nanotubes (FeNi@CoN@BCN) was designed and optimized for use as a modified material for commercial polypropylene (PP) separators. The prepared FeNi@CoN@BCN-12 hybrid material presents strong chemisorption and catalytic conversion capabilities, which endows the FeNi@CoN@BCN-12//PP separator with enhanced polysulfide shuttling inhibition. The assembled Li-S cells with FeNi@CoN@BCN-12//PP separators have minimized charge transfer resistance and faster redox kinetics. Additionally, cells with FeNi@CoN@BCN-12//PP separator provide high reversible capacity of 674 mAh/g for 400 cycles at 0.5C and excellent cyclability for 1000 cycles at 2C with a low decay rate of 0.05 % per cycle. Therefore, this study provides a feasible functionalization route for improving the electrochemical performance of Li-S batteries through separator modification.
随着大规模清洁能源的快速发展，锂硫（Li-S）电池被认为是最具前景的储能装置之一。在本论文中，设计并优化了一种封装在硼碳氮化物纳米管中的铁镍@氮化钴多金属异质纳米晶体（FeNi@CoN@BCN），用作商用聚丙烯（PP）隔膜的改性材料。制备的FeNi@CoN@BCN-12杂化材料具有很强的化学吸附和催化转化能力，这赋予了FeNi@CoN@BCN-12//PP隔膜更强的多硫化物穿梭抑制能力。采用FeNi@CoN@BCN-12//PP隔膜组装的锂硫电池具有最小的电荷转移电阻和更快 的氧化还原动力学。此外，采用FeNi@CoN@BCN-12//PP隔膜的电池在0.5C下400次循环时提供674 mAh/g的高可逆容量，在2C下1000次循环时具有优异的循环稳定性，每次循环的衰减率低至0.05%。因此，本研究为通过隔膜改性提高锂硫电池的电化学性能提供了一条可行的功能化途径。
