文献类型：期刊文献

英文题名：A polyaniline-coated Ni-Co Prussian blue analogue nanocube-modified separator for high-performance lithium-sulfur batteries

作者：Li, Zilong[1];Wang, Yulin[1];Wang, Bin[1];Su, Haiping[1];Shang, Yazhuo[1];Liu, Honglai[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：48

期号：12

起止页码：5289

外文期刊名：NEW JOURNAL OF CHEMISTRY

收录：;EI(收录号：20241015707603);WOS:【SCI-EXPANDED(收录号:WOS:001178438700001)】；

基金：This work was financially supported by the National Key R&D Program of China (2022YFA1503501) and the Fundamental Research Funds for the Central Universities (2022ZFJH004).

语种：英文

外文关键词：Binary alloys - Lithium batteries - Lithium compounds - Polysulfides - Reaction kinetics - Separators

摘要：Lithium-sulfur (Li-S) batteries have gained significant attention as promising candidates for next-generation energy storage systems due to their high theoretical energy density. However, their commercialization has been limited due to serious polysulfide dissolution. Herein, we synthesized polyaniline-coated Ni-Co Prussian blue nanocubes (NCP@PANi) for Li-S battery separator modification using a simple coprecipitation and in situ oxidation polymerization method. The synergistic catalytic effect of Ni and Co bimetallics enhanced the cathodic reaction kinetics. In addition, the coating of PANi on the NCP surface further improved the electrical conductivity and adsorption of polysulfides. The sulfur/ketjen black cathode (S/KB) using the modified separator exhibited an initial discharge specific capacity of 1443.1 mA h g-1 at 0.1C. Even at a high sulfur loading of 3.1 mg cm-2, it exhibited an initial capacity of 713.9 mA h g-1 at 0.5C and maintained 431.3 mA h g-1 after 300 cycles. Overall, the NCP@PANi modified separator effectively inhibited the polysulfide shuttling and thus improved the electrochemical performance. This study provides valuable insights into separator modification for Li-S batteries. A PANi-coated Ni-Co-based Prussian blue analogue (NCP@PANi) was synthesized through a simple coprecipitation and in situ oxidation polymerization method. The NCP@PANi-modified separators can inhibit the polysulfide shuttling effectively.