Charge retention increases with the increase of ptfe concentration after the addition ptfe whether in positive electrodes or in negative electrodes or treated by hydrophobic in the surface of negative electrodes 无论是在正极还是负极添加ptfe乳液或者负极表面进行憎水处理,随着ptfe乳液用量或者浓度的升高,荷电保持率在增大。