Flexible yet impermeable composites with wrinkle structured BNNSs assembling for high-performance thermal management

Guo，Guilei1; Liu，Yijie2,3; Ding，Yafei4; Liu，Wenjie2; Zhu，Guimei5; Hao，Xiaoli6; Huang，Xingyi2; Xia，Jianfei6; Li，Baowen4,5,7; Zhang，Tong Yi8; Sun，Bin1,9

2024-12-01

10.1038/s41528-024-00320-4

npj Flexible Electronics   影响因子和分区

2397-4621

Efficient thermal management has become one of the most critical issues of electronics because of the high heat flux generated from highly integrated, miniaturized, and increased power. Here we report highly flexible composites with aligned and overlapping interconnected boron nitride nanosheets (BNNSs) assembled in wrinkle structures. Besides high in-plane thermal conductivity of more than 26.58 W m K, such structure rendered enhanced through-plane conduction along with increasing pre-stain. As thermal interface materials (TIMs) of both rigid and flexible devices, the composites revealed an outstanding thermal cooling capability outperforming some commercial TIMs. During a record-long bending process of more than 3000 cycles, the maximum temperature fluctuation of the flexible device with 100%-prestrained composite was only within 0.9 °C, less than one-third of that with commercial thermal pad. Moreover, the composite revealed a superior impermeability for flexible seals. Our results illustrate that the composites could be an ideal candidate for the thermal management of emerging flexible electronics.

SCI

英语

其他

2-s2.0-85194826800

Scopus

1.College of Electronics and Information,Qingdao University,Qingdao,266071,China
2.Department of Polymer Science and Engineering,Shanghai Key Laboratory of Electrical Insulation and Thermal Aging,Shanghai Jiao Tong University,Shanghai,200240,China
3.School of Electrical Engineering,Southwest Jiaotong University,Chengdu,611756,China
4.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
5.School of Microelectronics,Southern University of Science and Technology,Shenzhen,518055,China
6.College of Chemistry and Chemical Engineering,Shandong Sino-Japanese Center for Collaborative Research of Carbon Nanomaterials,Instrumental Analysis Center of Qingdao University,Qingdao University,Qingdao,266071,China
7.Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China
8.Guangzhou Municipal Key Laboratory of Materials Informatics,Sustainable Energy and Environment Thrust,Advanced Materials Thrust,Hong Kong University of Science and Technology (Guangzhou),Guangzhou,511400,China
9.Weihai Innovation Research Institute of Qingdao University,Weihai,264200,China

Guo，Guilei,Liu，Yijie,Ding，Yafei,et al. Flexible yet impermeable composites with wrinkle structured BNNSs assembling for high-performance thermal management[J]. npj Flexible Electronics,2024,8(1).

Guo，Guilei.,Liu，Yijie.,Ding，Yafei.,Liu，Wenjie.,Zhu，Guimei.,...&Sun，Bin.(2024).Flexible yet impermeable composites with wrinkle structured BNNSs assembling for high-performance thermal management.npj Flexible Electronics,8(1).

Guo，Guilei,et al."Flexible yet impermeable composites with wrinkle structured BNNSs assembling for high-performance thermal management".npj Flexible Electronics 8.1(2024).