Korea Advanced Institute of Science and Technology reports on its research on aluminum oxide (Al2O3) and its use as an ultrathin coating on patterned silicon wafer (p-Si) as a negative electrode for lithium ion batteries by surface sol-gel method. This research was presented at a meeting of the American Chemical Society as part of the 245th National Meeting & Exposition of the American Chemical Society.
Abstract: Ultrathin coating of Al2O3 on negative electrode for lithium ion batteries
Minho Yang, Korea Advanced Institute of Science and Technology
Phone: 82-42-350-1152
Email: minho.yang@kaist.ac.kr
Next generation lithium ion batteries have required the high energy/power density and long cycling stability for powering transportation and grid systems. The silicon has been expected as a suitable negative electrode to apply these areas due to high theoretical energy capacity (4200 mAh/g). However, the silicon suffers from huge volume expansion, which cause loss of electrical contact among active materials and finally capacity fading. Here, we demonstrated the ultrathin coating of Al2O3 on patterned silicon wafer (p-Si) as a negative electrode for lithium ion batteries by surface sol-gel method. Al2O3 coated p-Si was characterized by transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The TEM and XPS data revealed that the p-Si was conformably coated with 5 nm of Al2O3. The electrochemical behavior and cycle performance were examined by cyclic voltammetry, electrochemical impedance spectroscopy, and battery cycler.
Abstract: Ultrathin coating of Al2O3 on negative electrode for lithium ion batteries
Minho Yang, Korea Advanced Institute of Science and Technology
Phone: 82-42-350-1152
Email: minho.yang@kaist.ac.kr
Next generation lithium ion batteries have required the high energy/power density and long cycling stability for powering transportation and grid systems. The silicon has been expected as a suitable negative electrode to apply these areas due to high theoretical energy capacity (4200 mAh/g). However, the silicon suffers from huge volume expansion, which cause loss of electrical contact among active materials and finally capacity fading. Here, we demonstrated the ultrathin coating of Al2O3 on patterned silicon wafer (p-Si) as a negative electrode for lithium ion batteries by surface sol-gel method. Al2O3 coated p-Si was characterized by transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The TEM and XPS data revealed that the p-Si was conformably coated with 5 nm of Al2O3. The electrochemical behavior and cycle performance were examined by cyclic voltammetry, electrochemical impedance spectroscopy, and battery cycler.
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Korea Advanced Institute of Science and Technology
American Chemical Society
