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in situ/operando(Soft) X-ray Spectroscopy Study of Beyond Lithium-ion Batteries

Energy & Environmental Materials 2021年第2期4卷 139-157页

作者： Feipeng Yang Xuefei Feng Yi-Sheng Liu Li Cheng Kao Per-Anders Glans Wanli Yang Jinghua Guo Joint Center for Energy Storage Research Lemont IL 60439USA Advanced Light Source Lawrence Berkeley National LaboratoryBerkeley CA 94720USA Department of Chemistry and Biochemistry University of California Santa CruzSanta Cruz CA 95064USA

The lightweight,rechargeable lithium-ion battery is one of the dominant energy storage devices globally in portable electronics due to its high energy density,no memory effect,wide operating voltage,lightweight,and good charge ***,due to safety concerns,the depletion of lithium reserves,and the corresponding increase of cost,an alternative battery system becomes more and more *** develop alternative battery systems with low cost and high material abundance,for example,sodium,magnesium,zinc,and calcium,it is important to understand the chemical and electronic structure of *** X-ray spectroscopy,for example,X-ray absorption spectroscopy(XAS),X-ray emission spectroscopy(XES),and resonant inelastic soft X-ray scattering(RIXS),is an element-specific technique with sensitivity to the local chemical environment and structural order of the element of *** soft X-ray systems enable operando experiments that can be applied to amorphous and crystalline samples,making it a powerful tool for studying the electronic and structural changes in electrode and electrolyte *** this article,the application of in situ/operando(soft)X-ray spectroscopy in beyond lithium-ion batteries is reviewed to demonstrate how such spectroscopic characterizations could facilitate the interpretation of interfacial phenomena under in situ/operando condition and subsequent development of the beyond lithium-ion batteries.

关键词： (soft)X-ray spectroscopy beyond lithium-ion battery in situ/operando interface

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Unraveling Shuttle Effect and Suppression Strategy in Lithium/Sulfur Cells by in situ/operando X-ray Absorption Spectroscopic Characterization

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Energy & Environmental Materials 2021年第2期4卷 222-228页

作者： Lujie Jia Jian Wang Shuaiyang Ren Guoxi Ren Xiang Jin Licheng Kao Xuefei Feng Feipeng Yang Qi Wang Ludi Pan Qingtian Li Yi-sheng Liu Yang Wu Gao Liu Jun Feng Shoushan Fan Yifan Ye Jinghua Guo Yuegang Zhang State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics Tsinghua UniversityBeijing 100084China Advanced Light Source and Energy Storage and Distributed Resources DivisionLawrence Berkeley National LaboratoryBerkeley CA 94720USA i-Lab Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China CAS Center for Excellence in Superconducting Electronics State Key Laboratory of Functional Materials for InformaticsShanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China 不详

The polysulfides shuttle effect represents a great challenge in achieving high capacity and long lifespan of lithium/sulfur(Li/S)cells.A comprehensive understanding of the shuttle-related sulfur speciation and diffusion process is vital for addressing this ***,we employed in situ/operando X-ray absorption spectroscopy(XAS)to trace the migration of polysulfides across the Li/S cells by precisely monitoring the sulfur chemical speciation at the cathodic electrolyte-separator and electrolyte-anode interfaces,respectively,in a real-time *** we adopted a shuttle-suppressing strategy by introducing an electrocatalytic layer of twinborn bismuth sulfide/bismuth oxide nanoclusters in a carbon matrix(BSOC),we found the Li/S cell showed greatly improved sulfur utilization and longer life *** operando S Kedge XAS results revealed that the BSOC modification was bi-functional:trapping polysulfides and catalyzing conversion of sulfur species *** elucidated that the polysulfide trapping-and-catalyzing effect of the BSOC electrocatalytic layer resulted in an effective lithium anode *** results could offer potential stratagem for designing more advanced Li/S cells.

关键词： in situ/operando lithium/sulfur cell shuttle effect sulfur speciation X-ray absorption spectroscopy

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Charactering and optimizing cathode electrolytes interface for advanced rechargeable batteries:Promises and challenges

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Green Energy & Environment 2022年第4期7卷 606-635页

作者： Zhongyang Zhang Xinran Wang Ying Bai Chuan Wu Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science&EngineeringBeijing Institute of TechnologyBeijingChina Yangtze Delta Region Academy of Beijing Institute of Technology Jiaxing314019China

With the advancement of secondary batteries,interfacial properties of electrode materials have been recognized as essential factors to their electrochemical ***,the majority of investigations are devoted into advanced electrode materials synthesis,while there is insufficient attention paid to regulate their *** this regard,the solid electrolyte interphase(SEI)at anode part has been studied for 40 years,already achieving remarkable outcomes on improving the stability of anode ***,the study on the cathode electrolyte interfaces(CEI)remains in infancy,which constitutes a potential restriction to the capacity contribution,stability and safety of *** fact,the native CEI generally possesses unfavorable characteristics against structural and compositional stability that requires demanding optimization ***,an in-depth understanding of the CEI is of great significance to guide the optimization principles in terms of composition,structure,growth mechanism,and electrochemical *** this literature,recent progress and advances of the CEI characterization methods and optimization protocols are summarized,and meanwhile the mutually-reinforced mechanisms between detection and modification are *** criteria and the potential development of the CEI characterization are proposed with insights of novel optimization directions.

关键词： Cathode electrolyte interface Secondary battery Characterization methods in situ/operando Synchrotron radiation

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