Direct Tracking of Additive‐Regulated Evolution on the Lithium Anode in Quasi‐Solid‐State Lithium–Sulfur Batteries. Issue 40 (26th August 2022)

• Record Type: Journal Article
• Authors: Liu, Gui‐Xian; Wan, Jing; Shi, Yang; Guo, Hui‐Juan; Song, Yue‐Xian; Jiang, Ke‐Cheng; Guo, Yu‐Guo; Wen, Rui; Wan, Li‐Jun
• Is Part Of: Advanced energy materials. Volume 12:Issue 40(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-08-26
• Subjects: additive regulation -- anode process -- in‐situ AFM -- quasi‐solid‐state lithium‐sulfur batteries -- solid electrolyte interphase; Energy harvesting -- Materials -- Periodicals; Energy conversion -- Materials -- Periodicals; Energy storage -- Materials -- Periodicals; Photovoltaics -- Periodicals; Fuel cells -- Periodicals; Thermoelectric materials -- Periodicals; 621.31
• DOI: 10.1002/aenm.202201411
• Languages: English
• ISSNs: 1614-6832

Abstract

Abstract: The complicated problems confronted by lithium (Li) anode hinder the practical application of quasi‐solid‐state lithium‐sulfur (QSSLS) batteries. However, the interfacial processes and reaction mechanisms, which are still vague, pose challenges to disclose. Herein, the insoluble sulfides stacking and Li dendrites growth on the Li anode are real‐time monitored via in‐situ atomic force microscopy inside the working QSSLS batteries. In the LiNO3 ‐added electrolyte, it is detected that the formation process of solid electrolyte interphase (SEI) involves two stages, forming loose nanoparticles (NPs, ≈102 nm) at the open circuit potential and dense NPs (≈74 nm) during discharging owing to the synergism of Li polysulfides (LiPSs) and LiNO3 . The compact SEI film not only blocks the erosion of LiPSs but also homogenizes the Li deposition behaviors, leading to the electrochemical performance enhancement of QSSLS batteries. These straightforward insights uncover the additive‐manipulated morphological/chemical evolution and interfacial properties and thus facilitate the improvement of QSSLS batteries. Abstract : The electrochemical processes on the lithium anode in quasi‐solid‐state lithium‐sulfur batteries are revealed via in‐situ atomic force microscopy and Raman spectroscopy. The insoluble sulfides accumulation and lithium dendrites growth take responsibilities for anode degradation. In‐situ analyses reveal that the on‐site formed solid electrolyte interphase induced by the addition of LiNO3 blocks erosion of polysulfides and further regulates Li deposition behaviors.