基于硅/碳负极的锂离子电池宽温域性能优化与机理研究数据集

数据集收集了2023年6月至2024年11月期间，基于硅/碳复合材料的锂离子电池的宽温域性能优化和机理研究。通过电解质组分优化，在硅/碳负极上构筑“刚柔并济”、低电阻的稳定 SEI，缓解微米级硅基负极巨大的体积膨胀，实现宽温域范围内硅/碳负极的高容量和稳定循环；采用变温Raman、FT-IR、EIS等表征技术，表征了不同环境温度下硅/碳负极在充放电过程中的组分、结构、SEI的演变，总结 SEI 微结构-宽温域性能的构效关系，揭示基于硅/碳复合材料的锂离子电池的宽温域性能增强机制。通过电解液调控优化了2种电解液体系，实现硅/碳负极在−40~60 ℃范围内稳定工作，循环寿命>100 次：25 ℃时容量为1990 mAh/g；−40 ℃下容量为782 mAh/g；60 ℃下容量为591 mAh/g，并通过了第三方检测。在潜在利用价值与意义方面，该数据集为制备高性能的锂离子电池负极材料提供了重要的方法和数据基础，具有重要的学术和应用价值，数据量为56.3MB。

This dataset focuses on the wide-temperature performance optimization and mechanism research of silicon/carbon composite-based lithium-ion batteries, covering the period from June 2023 to November 2024. By optimizing electrolyte components, a stable SEI (Solid Electrolyte Interphase) with balanced rigidity and flexibility and low resistance is constructed on the silicon/carbon anode, which alleviates the severe volume expansion of micron-scale silicon-based anodes and realizes high capacity and stable cycling of the silicon/carbon anode across a wide temperature range. Characterization techniques including variable-temperature Raman, Fourier Transform Infrared Spectroscopy (FT-IR), and Electrochemical Impedance Spectroscopy (EIS) are employed to characterize the composition, structure, and SEI evolution of silicon/carbon anodes during charging and discharging processes under different ambient temperatures. The structure-performance relationship between SEI microstructure and wide-temperature performance is summarized, and the wide-temperature performance enhancement mechanism of silicon/carbon composite-based lithium-ion batteries is revealed. Two electrolyte systems are optimized through electrolyte regulation, enabling the silicon/carbon anode to operate stably within the temperature range of -40 °C to 60 °C with a cycle life of over 100 cycles: the specific capacity reaches 1990 mAh/g at 25 °C, 782 mAh/g at -40 °C, and 591 mAh/g at 60 °C. The test results have passed third-party verification. In terms of potential application value and academic significance, this dataset provides an important methodological and data foundation for the preparation of high-performance lithium-ion battery anode materials, holding significant academic and application values. The total data volume of this dataset is 56.3 MB.

搜集汇总

背景与挑战

背景概述

该数据集聚焦于硅/碳负极锂离子电池，通过优化电解质组分和表征技术，研究其在宽温域（-40~60℃）下的性能优化与机理。数据涵盖了2023年6月至2024年11月期间的实验成果，包括容量和循环寿命等关键指标，为高性能电池负极材料的开发提供了重要基础。