Hi'/> Thermal performance enhancement of composite phase change materials (PCM) using graphene and carbon nanotubes as additives for the potential application in lithium-ion power battery
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首页> 外文期刊>International Journal of Heat and Mass Transfer >Thermal performance enhancement of composite phase change materials (PCM) using graphene and carbon nanotubes as additives for the potential application in lithium-ion power battery
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Thermal performance enhancement of composite phase change materials (PCM) using graphene and carbon nanotubes as additives for the potential application in lithium-ion power battery

机译：使用石墨烯和碳纳米管作为添加剂的复合相变材料（PCM）的热性能增强，有望在锂离子动力电池中应用

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Highlights•Synergetic enhancement heat transfer using graphene and MWCNT was put forward.•The optimal addition amount of carbon additives was obtained.•The optimal MWCNT/graphene mass ratio was obtained.•Effect of convection heat transfer on battery thermal management was analyzed.AbstractTo improve the performance of lithium-ion power battery thermal management system, multi-walled carbon nanotubes (MWCNT)-based, graphene-based and MWCNT/graphene-based composite phase change materials (PCM) were prepared and experimentally studied. MWCNT-based and graphene-based composite PCM were studied to obtain the optimal addition amounts which could not only improve thermal conductivity but also restrain a rapid temperature rise in liquid PCM. Based on that, composite PCM with various proportion of graphene and MWCNT have been prepared and characterized under the optimal addition amount. In comparison, results showed that composite PCM at the MWCNT/graphene mass ratio of 3/7 could exhibit the best synergistic enhancement heat transfer effect, which the thermal conductivity was increased by 31.8%, 55.4% and 124% compared to graphene-based composite PCM, MWCNT-based composite PCM and pure PCM respectively. In addition, this composite PCM has the highest increase/decrement rate of temperature which can be shortened by 63.3% and 50.0% compared to pure PCM. Finally, the phase change properties and thermal properties of the MWCNT/graphene-based PCM were compared with those of pure PCM. The composite PCM showed great potential in lithium-ion power battery thermal management.
机译： 突出显示 • 提出了利用石墨烯和MWCNT的协同增强传热的方法。 < ce：list-item id =“ o0010”> • 获得了最佳的碳添加剂添加量。 • 获得了最佳的MWCNT /石墨烯质量比。 • < ce：para id =“ p0020” view =“ all”>分析了对流换热对电池热管理的影响。 摘要 为了改善锂离子动力电池热管理系统的性能，制备并实验研究了多壁碳纳米管（MWCNT），石墨烯以及MWCNT /石墨烯复合相变材料（PCM）。对MWCNT基和石墨烯基复合PCM进行了研究，以获得最佳的添加量，该添加量不仅可以提高导热系数，而且可以抑制液态PCM中温度的快速升高。在此基础上，制备了具有不同比例的石墨烯和MWCNT的复合PCM，并对其进行了优化。相比之下，结果表明，MWCNT /石墨烯质量比为3/7的复合PCM可以表现出最佳的协同增强传热效果，与石墨烯基复合材料相比，导热系数提高了31.8％，55.4％和124％ PCM，基于MWCNT的复合PCM和纯PCM。另外，该复合PCM具有最高的温度升高/降低速率，与纯PCM相比可以缩短63.3％和50.0％。最后，将MWCNT /石墨烯基PCM与纯PCM的相变性质和热性质进行了比较。复合PCM在锂离子动力电池热管理中显示出巨大潜力。

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