Electrically insulating phase change composite materials (PCCMs) with lightweight, good thermal management performance, high stability and high mechanical strength are strongly desired for lithium-ion battery (LIB) thermal management. This research study presents a group of PCCMs based on the integration of reduced graphene-oxide aerogel beads (rGOAB), phase change materials (PCMs) and thermally conductive silicone rubbers (SRs). To demonstrate the thermal management performance, a 3 × 3 square 18650 LIB module was inserted into a SR pack. The temperature reduction (temperature reduction of the battery cells at the hottest point in the SR pack compared with in air) reached 8.6 °C, 13.0 °C and 14.7 °C at 1C, 2C and 3C discharge rate, respectively, at a concentration of 20 wt% PCM beads in SR with thermal conductivity of 0.5 W/mK. The specific energy reduction of above-mentioned pack is only 15.8%, substantially lower than the commercial level (above 30% to 40%). The lowest specific energy reduction in SR pack with thermal conductivity of 0.3 W/mK goes down to 13.4%, indicating its remarkable lightweight and high energy density features. The effects of PCM-encapsulant type, SR matrix thermal conductivity and bead size on LIB temperature reduction were also discussed. The heat transfer mechanism between the matrixes and rGOAB/PCM was thoroughly explained. Mechanical properties and battery thermal management performance of the composites were systematically examined. The rGOAB/PCM@SR composites exhibited more than 10 times of impact strength compared with expanded graphite-based PCCMs and higher compressive toughness above the phase transition point.

锂离子电池（LIB）热管理迫切需要具有轻巧，良好的热管理性能，高稳定性和高机械强度的电绝缘相变复合材料（PCCM）。本研究报告提出了一组基于还原型氧化石墨烯气凝胶珠（rGOAB），相变材料（PCM）和导热硅橡胶（SRs）的PCCM。为了演示热管理性能，将一个3×3方形的18650 LIB模块插入了SR包中。在1C，2C和3C的放电速率下，温度降低（与空气中的SR电池组中最热的电池单元相比，空气中的温度降低）分别达到8.6°C，13.0°C和14.7°C。 SR中20 wt％的PCM珠，热导率为0.5 W / mK。上述包装的单位能耗降低仅为15.8％，大大低于商业水平（超过30％至40％）。在SR包中，导热系数为0.3 W / mK的最低单位能量降低降至13.4％，这表明它具有非凡的轻质和高能量密度特性。还讨论了PCM密封剂类型，SR矩阵热导率和磁珠尺寸对LIB温度降低的影响。彻底解释了基质与rGOAB / PCM之间的传热机理。系统地检查了复合材料的机械性能和电池热管理性能。与膨胀的石墨基PCCM相比，rGOAB / PCM @ SR复合材料的冲击强度高出10倍以上，并且在相变点以上具有更高的压缩韧性。