Precisely visit the performance modulation of functionalized separator in Li-S batteries via consecutive multiscale analysis

DOI: 10.1016/j.ensm.2022.04.003

Authors: Zhangxiang Hao (Hubei University of Technology; University College London) , Jie Chen (Huazhong University of Science and Technology) , Xuekun Lu (University College London) , Liqun Kang (University College London) , Chun Tan (University College London) , Ruoyu Xu (University College London) , Lixia Yuan (Huazhong University of Science and Technology) , Dan J.l. Brett (University College London; The Faraday Institution) , Paul R. Shearing (University College London; The Faraday Institution) , Feng Ryan Wang (University College London) , Yunhui Huang (Huazhong University of Science and Technology)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Energy Storage Materials , VOL 1

State: Published (Approved)
Published: April 2022
Diamond Proposal Number(s): 19072 , 19246

Abstract: Despite progress of functionalized separator in preventing the shuttle effect and promoting the sulfur utilization, the precise and non-destructive investigation of structure-function-performance associativity remains limited so far in Li-S batteries. Here, we build consecutive multiscale analysis via combining X-ray absorption fine structure (XAFS) and X-ray computational tomography (CT) techniques to precisely visit the structure-function-performance relationship. XAFS measurement offers the atomic scale changes in the chemical structure and environment. Moreover, a non-destructive technique of X-ray CT proves the functionalized separator role for microscopic scale, which is powerful chaining to bridge the chemical structures of the materials with the overall performance modulation of cells. Benefiting from this consecutive multiscale analysis, we report that the uniform doping of Sr2+ into the perovskite LaMnO3-δ material changes the Mn oxidation states and conductivity (chemical structure), leading to effective lithium polysulfide trapping and accelerated sulfur redox (separator function), and resulting in outstanding cell performance.

Journal Keywords: Precisely visit; performance modulation; functionalized separator; Li-S batteries; consecutive multiscale analysis

Diamond Keywords: Batteries; Lithium-Sulphur

Subject Areas: Materials, Chemistry, Energy

Diamond Offline Facilities: Electron Physical Sciences Imaging Centre (ePSIC)
Instruments: B18-Core EXAFS , E01-JEM ARM 200CF

Added On: 06/04/2022 10:46

Documents:
1-s2.0-S2405829722001908-main.pdf

Discipline Tags:

Energy Storage Energy Physical Chemistry Energy Materials Chemistry Materials Science

Technical Tags:

Microscopy Spectroscopy Electron Microscopy (EM) X-ray Absorption Spectroscopy (XAS) Extended X-ray Absorption Fine Structure (EXAFS) X-ray Absorption Near Edge Structure (XANES) Scanning Transmission Electron Microscopy (STEM)