The material inside the hard carbon coated equipment is the earliest discovered. Then, due to its safety issues, graphite was added to stabilize the negative electrode. The current problem is that the energy crisis and environmental pollution require the vigorous development of new energy vehicles. However, lithium batteries with graphite as the negative electrode have insufficient energy to reduce the cost of new energy vehicles and increase their range. In order to reduce the cost of new energy vehicles and increase their range, research has shifted back to metal lithium negative electrodes, despite some technological advancements, However, metal lithium negative electrodes still cannot be applied in practice, but the development of technology cannot keep up with the huge demand in the current market. So what should we do? Improve the original graphite negative electrode - research has proven that the carbon homologous element - silicon has a huge theoretical specific capacity
The presence of carbon material in hard carbon coating equipment can effectively improve its conductivity, and its volume will also change accordingly to avoid agglomeration of silicon particles. Reasonable design of the structure of silicon carbon materials can better suppress the volume change of the material, such as designing silicon carbon materials into core-shell structures, porous structures, etc., to reserve space for volume expansion or buffering