Preparation method of lithium battery negative electrode thin film material and lithium battery with high cycle performance

The invention provides a preparation method of a lithium battery negative electrode thin film material and a lithium battery with high cycle performance, lithium, a lithium-loving metal and a carbon material are mixed to form an alloy by adopting a melting method, and the alloy is uniformly coated on a carbon nanotube thin film, so that an ultrathin flexible lithium negative electrode material with certain mechanical strength is obtained. According to the composite lithium negative electrode material, lithium can be uniformly deposited in the cycle process of the battery, lithium dendrites are prevented from being generated, the problems of lithium volume expansion and the like are solved, the cycle stability, safety and rate capability of the battery are greatly improved, and the composite lithium negative electrode material has a wide application prospect in the field of lithium metal batteries. 本发明提供了一种锂电池负极薄膜材料的制备方法及高循环性能的锂电池，采用熔融法将锂、亲锂金属、碳材料混合形成合金并均匀地涂覆在碳纳米管薄膜上，从而获得超薄的具有一定机械强度的柔性锂负极材料。所述复合锂负极材料在电池循环过程中能够