Nanometer silicon carbide powder, polysiloxane or silicon oxide, lithium polyacetylene and metal mixed powder;
The metal mixed powder is made of metal lithium powder, metal aluminum powder, metal beryllium powder, metal magnesium powder, metal titanium powder (negative electrode material), or metal lithium powder and metal lanthanum powder (positive electrode material);
Anode material formula:
The weight ratio of nano silicon carbide powder, polysiloxane, lithiated polyacetylene and metal mixed powder is 0.1 to 2%; 45 to 54.5%; 30 to 45%; 0.4 to 23%;
The weight ratio of the (metal mixed powder) metal lithium powder, metal aluminum powder, metal beryllium powder, metal magnesium powder and metal titanium powder is 90 to 99%; 0.5 to 3%: 0.1 to 3%; 0.2 to 2%; 0.2 to 2%.
Cathode material formula:
The weight ratio of nanometer silicon carbide powder, silicon oxide, lithiated polyacetylene and metal mixed powder is 0.1 to 2%; 45 to 54.5%; 30 to 45%; 0.4 to 23%;
The weight ratio of the (metal mixed powder) metal lithium powder and metal lanthanum powder is 68 to 95%; 5 to 32%.
Steps:
1. The prepared reaction starting materials are mixed uniformly, then dried, and finally pressed into tablets;
2. A plurality of dielectric barrier discharge electrodes are arranged in the reaction vacuum chamber, and the wafer is placed between the dielectric barrier discharge electrodes, and a plurality of lasers are uniformly arranged outside the reaction vacuum chamber;
3. The reaction vacuum chamber is evacuated and energized. The dielectric barrier discharge generates a plasma, and the laser emits a laser to vaporize the wafer. It is left for 72 hours.
3. Results:
The full silicon lithium secondary battery assembled with electrodes prepared from the nano-silicon carbide material with high metal content has long life, high capacity, and good cycle performance. Its first Coulombic efficiency reaches 99.9%, and the discharge platform is 4.2 to 3.3V. , The specific capacity reaches 2500mAh / g, the discharge energy density reaches 1600 ～ 2200Wh / kg, the power density reaches 1500 ～ 2600W / kg, and the cycle can reach 30,000 times.