Super-aligned films of sub-1 nm Bi_(2)O_(3)-polyoxometalate nanowires as interlayers in lithiumsulfur batteries  

超顺排的Bi_(2)O_(3)-多酸亚纳米线薄膜用于锂硫电池中间层

作　　者：Simin Zhang Haodong Shi Junwang Tang Wenxiong Shi Zhong-Shuai Wu Xun Wang 张思敏;石浩东;唐军旺;匙文雄;吴忠帅;王训(Key Lab of Organic Optoelectronics and Molecular Engineering,Department of Chemistry,Tsinghua University,Beijing 100084,China;State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China;Dalian National Laboratory for Clean Energy(DNL),Chinese Academy of Sciences(CAS),Dalian 116023,China;University of Chinese Academy of Sciences,Beijing 100049,China;Department of Chemical Engineering,University College London(UCL),WC1E 7JE London,United Kingdom;Institute for New Energy Materials and Low Carbon Technologies,School of Materials Science and Engineering,Tianjin University of Technology,Tianjin 300387,China)

机构地区：[1]Key Lab of Organic Optoelectronics and Molecular Engineering,Department of Chemistry,Tsinghua University,Beijing 100084,China [2]State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China [3]Dalian National Laboratory for Clean Energy(DNL),Chinese Academy of Sciences(CAS),Dalian 116023,China [4]University of Chinese Academy of Sciences,Beijing 100049,China [5]Department of Chemical Engineering,University College London(UCL),WC1E 7JE London,United Kingdom [6]Institute for New Energy Materials and Low Carbon Technologies,School of Materials Science and Engineering,Tianjin University of Technology,Tianjin 300387,China

出　　处：《Science China Materials》2021年第12期2949-2957,共9页中国科学（材料科学（英文版）

基　　金：supported by the Ministry of Science and Technology of China (2017YFA0700101, 2016YFA0202801 and 2016YBF0100100);China Postdoctoral Science Foundation funded project (2020TQ0164);the Shuimu Tsinghua Scholar Program;the National Natural Science Foundation of China (22035004, 51872283 and 21805273);Liaoning Bai Qian Wan Talents Program;Liaoning Revitalization Talents Program (XLYC1807153);Dalian Institute of Chemical Physics (DICP ZZBS201708, DICP ZZBS201802 and DICP I202032);DICP&QIBEBT (DICP&QIBEBT UN201702);Dalian National Laboratory For Clean Energy (DNL) Cooperation Fund;CAS (DNL180310, DNL180308, DNL201912 and DNL201915)。

摘　　要：Sub-1 nm nanowires(SNWs) can not only be processed like polymers due to their polymer-analogue properties but also show multifunctions owing to their well-manipulated compositions and structures. Rationally designed and engineered multicomponent heterostructure SNWs can further enhance their multifunction performance while it is very challenging to achieve such SNWs at sub-nanoscale.Herein, we synthesized Bi_(2)O_(3)-polyoxometalate heterostructure SNWs(PMB SNWs), and fabricated super-aligned PMB SNWs films(S-PMB SNWs films), which can serve as interlayers to efficiently suppress lithium polysulfide(LPS)shuttling, intrinsically promote the redox kinetics of the LPS conversion and substantially protect the Li anode. The lithium-sulfur(Li-S) battery with the S-PMB SNWs film as the interlayer showcases an ultralow capacity decay rate with 0.013% per cycle over 850 cycles. This study demonstrates the potential of heterostructure SNWs to improve the performance of Li-S batteries.亚纳米线(SNWs)具有类高分子的性质,可以像高分子一样进行加工,而且其组成和结构易于调控,具有丰富的功能.合理设计多组分异质结构SNWs可以进一步提高其功能性,然而目前合成这种SNWs仍然面临着巨大的挑战.本文合成了Bi_(2)O_(3)-多酸异质结构SNWs(PMB SNWs),并制备了超顺排的PMB SNWs薄膜(S-PMB SNWs薄膜),该薄膜可以作为中间层,有效抑制多硫化锂(LPSs)的穿梭,从本质上促进LPSs氧化还原转化动力学,并对锂阳极起到保护作用.以S-PMB SNWs膜作为中间层的锂硫(Li-S)电池在850次循环中表现出超低的容量衰减率,每循环一圈只衰减0.013%.本研究证明了这种异质结构的SNWs具有改善锂硫电池性能的潜力.

关 键 词：sub-1 nm nanowires polymer-resembling films lithium-ion batteries interlayer 

分 类 号：TM912[电气工程—电力电子与电力传动] TB383.2[一般工业技术—材料科学与工程]