35results about How to "Improve lithium intercalation capacity" patented technology

This application provides a negative electrode material comprising a carbon matrix and a silicon material, with at least a portion of the silicon material located within the carbon matrix. Raman spectroscopy was performed on N randomly selected sites on the particles of the negative electrode material, revealing an internal depth of 1342 ± 10 cm⁻¹. ‑1 It has the first characteristic peak at 1595±10 cm. ‑1 It has a second characteristic peak at 480±10 cm. ‑1 It has a third characteristic peak at 517±10 cm. ‑1 The anode material exhibits a fourth characteristic peak. The average value of the peak intensity ratio I1 / I2 of the first and second characteristic peaks measured at N sites is P, and the average value of the peak intensity ratio I3 / I4 of the third and fourth characteristic peaks measured at N sites is S. The anode material satisfies the following conditions: 0.9 < P < 1.2, 1.05 < S < 1.25, N ≥ 10. The anode material provided in this application possesses high capacity, low expansion, and superior first-pass coulombic efficiency.