Method for avoiding thermal runaway of lithium ion battery

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a method for avoiding thermal runaway of a lithium ion battery. The method comprises the following steps: (1) surface activation of raw vermiculite powder: grinding raw vermiculite into powder, cleaning the raw vermiculite powder, dynamically soaking the cleaned raw vermiculite powder in an acidic solution or an alkaline solution, carrying out solid-liquid separation, and drying the material; (2) preparation of a dispersion liquid: fully mixing and dissolving a solvent, a surfactant, a dispersingagent and a binder, adding raw vermiculite powder, uniformly stirring, and then adjusting the viscosity of the slurry to 1000-20000 mPa.S; (3) coating and baking. By adopting the method, the safety performance of the lithium ion battery can be improved, and the thermal runaway phenomenon is avoided. 本发明属于锂离子电池技术领域，具体涉及一种避免锂离子电池热失控的方法；包括如下步骤：(1)生蛭石粉的表面活化：取生蛭石研磨成粉后，将生蛭石粉清洗，采用酸性溶液或碱性溶液进行动态浸泡，然后经固液分离后烘干；(2)分散液配制：将溶剂、表面活性剂、分散