SPECTROSCOPIC STUDIES OF SOLID-ELECTROLYTE INTERPHASE ON POSITIVE AND NEGATIVE ELECTRODES FOR LITHIUM ION BATTERIES

The following sections are included:

• Introduction

• SEI on Tin Oxide Anode in Various Electrolytes

  • Sample Preparation and Instrumental

  • Capacity Loss and Electrolyte Decomposition in First Cycle

  • HRTEM Study of SEI Structure on Nano-SnO Surface

  • Identification of Li₂CO₃ and ROCO₂Li on Nano-SnO Anodes

  • Formation of Li₂CO₃ and ROCO₂Li on Nano-SnO Anodes

  • Question: What Is the Reduction Sequence of SnO and Electrolyte?

  • Electrolyte-Dependent SEI Compositions

  • Conclusions

• Surface Enhanced Raman Scattering (SERS) on Rough Electrodes

  • Normal Raman Scattering and SERS Studies on Battery Materials

  • Experimental

  • Electrochemical Performance of Ag Electrode

  • SERS Study of Passivating Film on Ag Electrode in Lithium Batteries

  • Prospects and Conclusions on Raman Scattering in SEI Investigation

• Infrared Absorption and X-ray Photoelectron Spectroscopic Investigation on Performance Improvement of Surface-Modified LiCoO₂ Cathode Materials

  • Sample Preparation

  • Comparison of EC Adsorbed on Different Substrates

  • IR Spectra of EC on Electrodes Charged to Different Voltages

  • XPS Study on Evolution of Electronic Structure of Cathode Materials with Charge Voltages

  • Conclusions

• Summary and Comments

• Acknowledgments

• References