【摘要】 石墨烯气凝胶(graphene aerogel,GA)由于其不理想的导热性能限制了它在储能装置中的应用。针对这个问题,系统而定量地研究了如何在提高GA热性能的同时降低电导率并应用在电池散热中的方法。该方法通过对GO进行氮掺杂并在中低温环境下进行水热反应制备复合气凝胶,对制备的复合气凝胶进行一系列相关测试,证明其优异的性能,并将制备的复合气凝胶用于电池散热中,设计了相关实验。实验结果表明,相较于空气自热冷却,采用复合气凝胶填充的电池pack组在放电时温升降低了15～23℃,表明了复合气凝胶用于电池散热的可行性和有效性。更多还原

【Abstract】 Graphene aerogels(GA) limit their applications in energy storage devices due to their poor thermal conductivity. In order to solve this problem, this paper systematically and quantitatively studied how to improve the thermal properties of GA while reducing the electrical conductivity and further applying the method to the heat dissipation of the battery. This method first prepared the compound aerogel by the nitrogen doping of GO and the hydrothermal reaction under the medium and low temperature environment. Then a series of related tests were carried out on the prepared composite aerogels. The results showed their excellent performance. Finally, the prepared composite aerogels were used in the heat dissipation of the battery, and the related experiments were designed. The experimental results showed that the temperature of the pack group filled with compound gas condensate decreased by 15～23 ℃ when the air cooled, and the compound aerogel was used for the use of the aerogel. It shows that the heat dissipation of the battery is feasible and effective.更多还原