LDHs derived nanoparticle-stacked metal nitride as interlayer for long-life lithium sulfur batteries

Zhen Li; Zhaoling Ma; Yanyong Wang; Ru Chen; Zhenjun Wu; Shuangyin Wang

doi:10.1016/j.scib.2017.12.018

LDHs derived nanoparticle-stacked metal nitride as interlayer for long-life lithium sulfur batteries

Sci Bull (Beijing). 2018 Feb 15;63(3):169-175. doi: 10.1016/j.scib.2017.12.018. Epub 2017 Dec 20.

Authors

Zhen Li¹, Zhaoling Ma¹, Yanyong Wang¹, Ru Chen², Zhenjun Wu³, Shuangyin Wang⁴

Affiliations

¹ State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Provincial Hunan Key Laboratory for Graphene Materials and Devices, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.
² State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Provincial Hunan Key Laboratory for Graphene Materials and Devices, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China. Electronic address: chenru@hnu.edu.cn.
³ State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Provincial Hunan Key Laboratory for Graphene Materials and Devices, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China. Electronic address: wooawt@hnu.edu.cn.
⁴ State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Provincial Hunan Key Laboratory for Graphene Materials and Devices, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China. Electronic address: shuangyinwang@hnu.edu.cn.

PMID: 36659002
DOI: 10.1016/j.scib.2017.12.018

Abstract

Shuttle effect is one of the most serious disadvantages in lithium-sulfur battery which results in poor cycle performance and hinders the commercialization of Li-S battery. To reduce the dissolution of polysulfides into the electrolyte and prolong the cycling stability, nanoparticle-stacked metal nitride derived from layered double hydroxides (LDHs) as an interlayer was inserted between sulfur cathode and separator to confine polysulfides by physical and chemical interactions. Meanwhile, the surface of metal nitride will form an oxide passivation layer. The passivation layer possesses hydrophilic metal-O group and provides a polar surface for strong binding with polysulfide. What's more, the nanoparticles-stacked structure could immerge and retain electrolyte well, which could enhance the ability of promoting the electron exchange rate. The sulfur electrode with nanoparticle-stacked metal nitride interlayer has an excellent cycle performance owing to the interactions between metal nitride and polysulfides. The battery delivered an initial capacity of 764.6 mAh g^-1 and still possesses a capacity of 477.5 mAh g^-1 with the retention of 62.4% after 800 cycles.

Keywords: Interlayer; Li-S batteries; Lithium polysulfides; Metal nitride; Nanoparticle-stacked structure.